More Airports Hotter Than ‘nearby’ Stations

This is turning out to be rather consistent. There have been a couple that are flatter trend lines, but the airports are consistently in the ‘warmer than the average’ group and often in the top few. ( it would be very interesting to figure out what Wunderground uses to rank stations. It can’t just be temperature as they are in scatter on the trend line, perhaps distance or elevation?)

For each of these major Airports, I’ll put up the graph, the average of the data, the difference between the Airport data item and the average, in both F and C. Two graphs will be given for each. One that is “all data” not filtered for High and Low (though on one I tossed a duplicate that was identical on all terms including location and time of datum) and the next having the Highest and Lowest value tossed out (or sometimes 2 or more if they had a tie for a value). These are graphed with a gap in the chart on the missing data item so that the graphs can be visually easily compared. Remember that the very first data point on the left will be the airport itself.

To me, with this added group of charts, it’s pretty darned clear that these large airports are not at all representative of their locations and are consistently on the hot side. This data was gathered in the dead of night, so while not an absolute “coldest” are from what ought to be a ‘cold and cooling’ time for that station and nearby stations. It looks to me like Airports just don’t cool down very fast and have a couple of degrees lag. (I have looked at the nearby station during the daytime and while it is a bit warmer, it isn’t as big a difference. Clearly a day / night comparison set needs to be done too. The same stations compared at 3 PM and 3 AM (or some similar standardized time) to see if there is a consistent pattern; such as both warms and cools more slowly, or warms faster and further then stays hot higher and longer.

My first instinct is that solar heating will be more effective but on cloudy / rainy days there will be little difference to the hot side. Cooling at night to lag due to thermal mass of concrete and asphalt, but not when it snows or perhaps even in heavy rain. That’s the working thesis at any rate. What we see in these graphs is just that the airports are hotter than their ‘nearby’ reporting stations and that difference tends to increase as you move down the Wunderground list (though not always).

The two earlier postings in this series are:

http://chiefio.wordpress.com/2012/07/26/salt-lake-city-airport/

http://chiefio.wordpress.com/2012/07/26/airports-atlanta-and-chicago-midway-vs-wunderground-nearby-list/

Anchorage Alaska Elmendorf AFB

All data:

Anchorage Alaska Elmendorf AFB all data 25 July 2012

Anchorage Alaska Elmendorf AFB all data 25 July 2012

Anchorage Alaska Elmendorf AFB -HL 25 July 2012

Anchorage Alaska Elmendorf AFB -HL 25 July 2012

Airport Temp: 55
Average: 52.04
Difference: 2.96 F 1.64 C

Honolulu Hawaii

This one is a very large difference. If there is a solar heating component, that would tend to show up more in the tropics. Then again, in Hawaii, temperatures don’t change much… so I’m really wondering why the Airport is so hot. IIRC, this was where WUWT found a broken sensor that was not replaced for a long time. Once can only wonder if they are having more sensor problems; or if the new sensor is just in a very hot place surrounded by concrete and tarmac.

Honolulu Hawaii PHNL all data compared to 'nearby' stations 25 July 2012

Honolulu Hawaii PHNL all data compared to ‘nearby’ stations 25 July 2012

Airport Temp: 77
Average: 72.75
Difference: 4.25 F 2.36 C

Honolulu Hawaii PHNL minus High and 3 Lows 25 July 2012

Honolulu Hawaii PHNL minus High and 3 Lows 25 July 2012

Airport Temp: 77
Average: 74.09
Difference: 2.91 F 1.62 C

Why take out the three lowest temperatures? They were all fairly low and at fairly high altitudes, so unlikely to be an accurate comparison to a nearly sea level airport. There are other data points in the set of data that are at some altitude, so perhaps an altitude adjustment could be made to find out bias minus adiabatic lapse rate. (Data blocks at the end down below).

Sacramento, California McClellan AFB

Sacramento California,  McClellan AFB 25 July 2012 all data

Sacramento California, McClellan AFB 25 July 2012 all data

Airport Temp: 64
Average: 62.7
Difference: 1.3 F 0.7 C

Sacramento California,  McClellan AFB -High and Low  25 July 2012

Sacramento California, McClellan AFB -High and Low 25 July 2012

Airport Temp: 64
Average: 62.8
Difference: 1.2 F 0.7 C

Sacramento in July is often over 90 F and often stays in the 80 F range into the night. I grew up about 70 miles north of Sacramento and temperatures in the 60 F range at night in summer is fairly rare. It can happen, especially down near Sacramento when the winds start up off the San Franciso Bay / Delta waters. It has been fairly overcast and cloudy here a lot lately (rather like it was back in the 1950s) but that ought not to change the relative positions of the airport vs nearby too much (other than flattening the trend compared to solar heated tarmac a bit).

Still, a closer look at Sacramento on a clear hot sunny day and night would be in order.

Washington DC KDCA

The nation’s capital. It can get hot in that urban complex in the summer…

Washington DC KDCA all data 25 July 2012 'nearby' stations

Washington DC KDCA all data 25 July 2012 ‘nearby’ stations

Airport Temp: 74
Average: 71.95
Difference: 2.05 F 1.14 C

Wash DC KDCA -High and - 2 Lows 25 July 2012 for 'nearby' stations

Wash DC KDCA -High and – 2 Lows 25 July 2012 for ‘nearby’ stations

Airport Temp: 74
Average: 72.15
Difference: 1.85 F 1.03 C

The Data Grabbed in the dead of night

Anchorage

Anchorage, AK
1:16 AM AKDT on July 25, 2012 (GMT -0800)
Elev: 98 ft 
Lon: 149.9° W
Lat: 61.2° N
Source		Rapid Fire Updates™		Updated 22 min 34 sec ago 

Tropical Weather: Invest 98l  (North Atlantic) Invest 90e  (East Pacific) 

 Anchorage Weather at a Glance 
Weather Station
Elmendorf AFB (PAED)
Elevation
210 ft 
Station Select
Now

Overcast
Temperature
55 °F 
Feels Like 55 °F 
Wind(mph)
7
Sunrise / Set
5:15 AM
10:54 PM

Weather Stations Station Location	Temp.	Windchill	Dew Point	Humidity	Wind	Precipitation	Elevation	Updated	Type	Website
Government Hill, Anchorage, AK	54.2 °F 	-	51 °F 	87%	 WSW   at  0.0 mph 	0.00 in / hr	94 ft	8 min 4 sec ago	Normal	
NOS_PORTS Anchorage, AK, Anchorage, AK	56 °F 	-	 - 	-	 SSW   at  4 mph 	0.00 in / hr	0 ft	30 min 1 sec ago	MADIS	
The Spurlocks at Airport Heights, Anchorage, AK	54.6 °F 	-	48 °F 	78%	 South   at  0.0 mph 	0.00 in / hr	104 ft	23 sec ago	Normal	 
ENSTAR 3000 Spenard Rd, Anchorage, AK	54.0 °F	-	51 °F 	88%	 ESE   at  0.0 mph 	0.00 in / hr	152 ft	53 sec ago	Normal	
KTUU-TV, Anchorage, AK	54.0 °F 	-	53 °F 	97%	South  at  2.0 mph 	0.00 in / hr	115 ft	4 sec ago	Rapid Fire	
Turnagain, Anchorage, AK	51.8 °F 	-	49 °F 	91%	 North   at  0.0 mph 	0.00 in / hr	50 ft	35 sec ago	Rapid Fire	
ENSTAR 401 E. Int'l Airport Rd., Anchorage, AK	54.5 °F 	-	51 °F 	87%	 NNE   at  1.0 mph 	0.00 in / hr	131 ft	5 min 11 sec ago	Normal	
Earthquake Park, Anchorage, AK	52.2 °F 	-	48 °F 	85%	 SSE   at  0.0 mph 	 - / hr	62 ft	15 min 32 sec ago	Normal	 
Earthquake Park, Anchorage, AK	52.2 °F 	-	48 °F 	85%	 SSE   at  0.0 mph 	 - / hr	62 ft	15 min 32 sec ago	Normal	 
IkoWeather @Turpin/E10th, Anchorage, AK	53.6 °F	-	50 °F 	86%	 SSE   at  0.8 mph 	0.00 in / hr	230 ft	3 sec ago	Rapid Fire	 
Cheney Lake, Anchorage, AK	53.1 °F 	-	50 °F 	90%	 SE   at  0.0 mph 	0.00 in / hr	252 ft	46 sec ago	Rapid Fire	 
East Anchorage, Anchorage, AK	51.6 °F 	-	50 °F 	94%	 WSW   at  1.0 mph 	0.00 in / hr	228 ft	8 min 27 sec ago	Normal	 
APRSWXNET East Northern Lights AK , Anchorage, AK	51 °F 	-	50 °F 	95%	 NW   at  0 mph 	0.00 in / hr	224 ft	24 min 1 sec ago	MADIS	
RAWS CAMPBELL CREEK AK, Anchorage, AK	51 °F 	-	50 °F 	95%	 East   at  0 mph 	0.00 in / hr	157 ft	22 min 1 sec ago	MADIS	
APRSWXNET Anchorage AK, Anchorage, AK	51 °F 	-	 - 	-	 WNW   at  0 mph 	0.00 in / hr	257 ft	24 min 1 sec ago	MADIS	
APRSWXNET Anchorage AK , Anchorage, AK	54 °F 	-	48 °F 	81%	 SSW   at  3 mph 	0.00 in / hr	295 ft	15 min 1 sec ago	MADIS	
Muldoon, Anchorage, AK	54.2 °F	-	49 °F 	82%	South  at  3.3 mph 	0.00 in / hr	295 ft	16 sec ago	Rapid Fire	 
Southeast Anchorage, Anchorage, AK	53.4 °F 	-	50 °F 	90%	 West   at  0.0 mph 	0.00 in / hr	250 ft	58 sec ago	Normal	 
Cherry Perry (Below TotemTheater), Anchorage, AK	53.4 °F 	-	49 °F 	86%	 SSW   at  2.0 mph 	0.00 in / hr	340 ft	2 min 44 sec ago	Normal	 
Chugach Foothills, Anchorage, AK	52.8 °F 	-	48 °F 	85%	 WNW   at  0.0 mph 	0.00 in / hr	350 ft	17 min 32 sec ago	Normal	 
RAWS GRAZELKA RANGE AK, Fort Richardson, AK	50 °F 	-	49 °F 	98%	 WSW   at  1 mph 	0.00 in / hr	453 ft	49 min 1 sec ago	MADIS	
Service High School-AWWU, Anchorage, AK	51.5 °F 	-	48 °F 	86%	 SW   at  0.0 mph 	0.00 in / hr	400 ft	2 min 39 sec ago	Normal	 
Bayshore, Anchorage, AK	52.2 °F 	-	47 °F 	82%	 SW   at  0.0 mph 	0.00 in / hr	67 ft	7 min 55 sec ago	Normal	
Mid Hillside Zoo, Anchorage, AK	52.5 °F 	-	50 °F 	91%	 South   at  0.0 mph 	0.00 in / hr	402 ft	39 sec ago	Normal	
Oceanview, Anchorage, AK	51.8 °F 	-	49 °F 	90%	 ESE   at  0.0 mph 	0.00 in / hr	75 ft	58 sec ago	Normal	 
AKDOT Seward Highway @ Huffman Road, Anchorage, AK	47 °F 	47 °F 	45 °F 	93%	 SE   at  0 mph 	0.00 in / hr	193 ft	58 min 1 sec ago	MADIS	
Tributary Cir, Anchorage, AK	51.7 °F 	-	46 °F 	81%	 SW   at  0.0 mph 	0.00 in / hr	188 ft	5 sec ago	Rapid Fire	
AKDOT Hillside Road @ Upper Huffman Road, Anchorage, AK	51 °F 	-	47 °F 	88%	 SE   at  2 mph 	0.00 in / hr	1017 ft	54 min 1 sec ago	MADIS	
Goldenview, Anchorage, AK	51.7 °F 	-	48 °F 	87%	 West   at  0.0 mph 	0.00 in / hr	710 ft	30 sec ago	Normal	 
Upper Hillside, Anchorage, AK	49.5 °F 	50 °F 	 - 	-	 South   at  0.0 mph 	0.00 in / hr	1354 ft	18 min 1 sec ago	Normal	 
APRSWXNET Anchorage AK , Anchorage, AK	50 °F 	-	 - 	-	 SSW   at  2 mph 	0.00 in / hr	1377 ft	21 min 1 sec ago	MADIS	
Upper DeArmoun Rd., Anchorage, AK	50.1 °F 	-	47 °F 	88%	 NNE   at  0.0 mph 	0.00 in / hr	1275 ft	2 min 57 sec ago	Normal	
Upper Stroganof Drive, Anchorage, AK	49.6 °F 	50 °F 	46 °F 	88%	 WSW   at  2.0 mph 	 - / hr	1560 ft	1 min 23 sec ago	Normal	 
RAWS RABBIT CREEK AK, Anchorage, AK	50 °F 	-	44 °F 	81%	 South   at  2 mph 	0.00 in / hr	1479 ft	22 min 1 sec ago	MADIS	
APRSWXNET Anchorage AK, Anchorage, AK	49 °F 	49 °F 	45 °F 	86%	 South   at  1 mph 	0.00 in / hr	2194 ft	40 min 1 sec ago	MADIS	
Airport Heights, Anchorage, AK	52.0 °F 	-	48 °F 	85%	 North   at  0.0 mph 	0.00 in / hr	-10000 ft	2 sec ago	Rapid Fire	 
South Anchorage, Anchorage, AK	50.9 °F 	-	50 °F 	97%	 WNW   at  0.0 mph 	0.00 in / hr	-10000 ft	3 sec ago	Rapid Fire	 
South Hillside, Anchorage, AK	50.7 °F 	-	46 °F 	83%	 ENE   at  0.0 mph 	0.00 in / hr	-10000 ft	1 sec ago	Rapid Fire	 

Honolulu

Honolulu Weather at a Glance 
Weather Station
Honolulu (PHNL)
Elevation
10 ft 
Station Select
Now

Partly Cloudy
Temperature
77 °F 
Feels Like 77 °F 
Wind(mph)
16
Sunrise / Set
6:01 AM
7:13 PM

Weather Stations Station Location	Temp.	Heat Index	Dew Point	Humidity	Wind	Precipitation	Elevation	Updated	Type	Website
Manoa-Woodlawn, Honolulu, HI	73.2 °F 	77 °F 	58 °F 	59%	NE  at  3.0 mph 	0.00 in / hr	460 ft	4 sec ago	Rapid Fire	 
NOS_NWLON Honolulu Harbor, HI, Honolulu, HI	76 °F 	74 °F 	 - 	-	 ENE   at  8 mph 	0.00 in / hr	0 ft	32 min 25 sec ago	MADIS	
Kaneohe, Kaneohe, HI	75.2 °F 	76 °F 	68 °F 	77%	 ESE   at  3.4 mph 	0.00 in / hr	164 ft	6 sec ago	Rapid Fire	 
Hawaii Loa Ridge, Honolulu, HI	71.7 °F 	72 °F 	66 °F 	82%	 ENE   at  12.0 mph 	0.00 in / hr	750 ft	20 sec ago	Normal	 
Kaelepulu Wetland, Kailua, HI	75.6 °F 	77 °F 	69 °F 	79%	 ENE   at  3.0 mph 	0.00 in / hr	12 ft	5 min 34 sec ago	Normal	
Enchanted Lake, Kailua, HI	75.6 °F 	77 °F 	68 °F 	77%	ENE  at  3.0 mph 	0.00 in / hr	21 ft	1 sec ago	Rapid Fire	
Kailua Beach Boatramp, Kailua, HI	76.3 °F 	78 °F 	67 °F 	72%	 ENE   at  1.1 mph 	0.00 in / hr	36 ft	10 min 20 sec ago	Rapid Fire	
APRSWXNET Honolulu HI, Honolulu, HI	73 °F 	74 °F 	66 °F 	78%	 NE   at  9 mph 	0.00 in / hr	430 ft	20 min 25 sec ago	MADIS	
RAWS WAIAWA PHB HI, Pearl City, HI	75 °F 	77 °F 	63 °F 	66%	 ENE   at  6 mph 	0.00 in / hr	4 ft	39 min 25 sec ago	MADIS	
RAWS HONOULIULI PHB HI, Ewa Beach, HI	76 °F 	78 °F 	64 °F 	67%	 ENE   at  8 mph 	0.00 in / hr	4 ft	39 min 25 sec ago	MADIS	
Kapolei, Makakilo, HI	74.3 °F	77 °F 	59 °F 	60%	 NW   at  0.0 mph 	0.00 in / hr	350 ft	18 sec ago	Rapid Fire	
MesoWest Wheeler AFB: O`ahu , Wheeler Army Airfield, HI	 - 	-	 - 	-	 NE   at  1 mph 	0.00 in / hr	867 ft	1 hr 41 min 25 sec ago	MADIS	
Upper Makakilo, Makakilo City, HI	70.3 °F 	71 °F 	64 °F 	80%	NNE  at  6.9 mph 	0.00 in / hr	1060 ft	5 sec ago	Rapid Fire	 
Schofield Barracks, Wahiawa, HI	71.1 °F 	76 °F 	57 °F 	61%	 NE   at  6.0 mph 	0.00 in / hr	899 ft	28 sec ago	Rapid Fire	 
RAWS SCHOFIELD BARRACKS HI, Schofield, HI	65 °F 	-	65 °F 	100%	 WSW   at  2 mph 	0.00 in / hr	979 ft	23 min 25 sec ago	MADIS	
RAWS SCHOFIELDSOUTHRANGE HI, Schofield, HI	65 °F 	-	-30 °F 	-	 NNE   at  0 mph 	0.00 in / hr	1488 ft	29 min 25 sec ago	MADIS	
RAWS WAIANAE VALLEY HI, Waianae, HI	71 °F 	74 °F 	60 °F 	69%	 West   at  6 mph 	0.00 in / hr	957 ft	43 min 25 sec ago	MADIS	
RAWS OAHU FOREST NWR HI, Kaaawa, HI	64 °F 	-	63 °F 	98%	 NE   at  0 mph 	0.00 in / hr	2292 ft	44 min 25 sec ago	MADIS	
RAWS PALEHUA HI, Kapolei, HI	77 °F 	79 °F 	66 °F 	68%	 NNE   at  7 mph 	0.00 in / hr	2370 ft	44 min 25 sec ago	MADIS	

Sacramento

Sacramento, CA
2:31 AM PDT on July 25, 2012 (GMT -0700)
Elev: 49 ft 
Lon: 121.5° W
Lat: 38.6° N
Source		Rapid Fire Updates™		Updated 18 min 17 sec ago 	

Tropical Weather: Invest 98l  (North Atlantic) Invest 90e  (East Pacific) 
 
 Weather Summary 

Jessica Parker

Weather Underground Forecast for Wednesday, July 25, 2012. 

 A low pressure system over the Northern Plains is expected to move eastward 
Wednesday and Thursday and become the main weather producer for the nation. 
Showers and thunderstorms will continue from the Northern and Central Plains 
to the Great Lakes and Ohio Valley. In particular, a slight risk of severe 
thunderstorms is expected from the Upper Mississippi and Mid-Missouri valleys 
across the Great Lakes, with the main threat of hail and damaging winds. 

 Apart from this system, a frontal boundary will remain over the Mid-Atlantic 
and parts of the Tennessee Valley and Southeast. Showers and thunderstorms are 
anticipated with this system. 

 Elsewhere, unsettled weather will persist over portions of the Gulf States. 
Expect showers and thunderstorms to become more widespread in the afternoon and 
evening especially over the coastal region. In addition, monsoonal flow will 
keep scattered showers and thunderstorms going over the Four Corners region. 
Farther north, a weak front in the northern Intermountain West may trigger a few 
showers and thunderstorms. 

 Another hot day is in store for portions of the Central Plains, Mississippi 
Valley and Ohio Valley Wednesday and Thursday. Afternoon temperatures are 
expected in the 100s with possible heat indicies 105 to 110. Moreover, minimum 
nighttime temperatures will only fall into the mid-70s. 
Continue Reading…

Weather Underground Broadcast Network
 Sacramento Weather at a Glance 
Weather Station
Sacramento / Mc Clellan (KMCC)
Elevation
79 ft 
Station Select
Now

Clear
Temperature
64 °F 
Feels Like 64 °F 
Wind(mph)
9
Sunrise / Set
6:02 AM
8:22 PM

Weather Stations Station Location	Temp.	Dew Point	Humidity	Wind	Precipitation	Elevation	Updated	Type	Website
MesoWest SACRAMENTO POST OFFICE , Sacramento, CA	65 °F 	 - 	-	 North   at   - 	0.00 in / hr	25 ft	43 min 42 sec ago	MADIS	
Midtown, Sacramento, CA	62.0 °F	51 °F 	67%	SE  at  0.0 mph 	 - / hr	21 ft	1 min 1 sec ago	Normal	
24th and K, Sacramento, CA	64.2 °F 	53 °F 	66%	 SW   at  1.6 mph 	0.00 in / hr	22 ft	1 sec ago	Rapid Fire	 
HADS GIBSON NEAR CASTELLA 10SSW CA, Sacramento, CA	61 °F 	 - 	-	 North   at   - 	0.00 in / hr	20 ft	1 hr 33 min 42 sec ago	MADIS	
37th between J and M, Sacramento, CA	65.9 °F 	49 °F 	55%	South  at  0.7 mph 	0.00 in / hr	33 ft	8 sec ago	Rapid Fire	 
Elmhurst - 50th St at HWY 50, Sacramento, CA	62.1 °F 	50 °F 	65%	NNW  at  0.0 mph 	0.00 in / hr	33 ft	3 sec ago	Rapid Fire	 
Natomas, Sacramento, CA	63.9 °F 	52 °F 	64%	 SSW   at  0.7 mph 	0.00 in / hr	13 ft	4 sec ago	Rapid Fire	 
MesoWest Sacramento-Goldenland Court , Sacramento, CA	64 °F 	50 °F 	60%	 SSE   at  4 mph 	0.00 in / hr	13 ft	1 hr 33 min 42 sec ago	MADIS	
Arden/Arcade, Sacramento, CA	63.3 °F 	54 °F 	71%	 ESE   at  1.4 mph 	 - / hr	20 ft	57 min 35 sec ago	Normal	
APRSWXNET Sacramento CA, Sacramento, CA	62.0 °F	52 °F 	69%	ESE  at  1.0 mph 	0.00 in / hr	42 ft	19 sec ago	MADIS	
So Land Park, Sacramento, CA	65.3 °F 	46 °F 	50%	 SE   at  4.6 mph 	0.00 in / hr	24 ft	17 sec ago	Rapid Fire	 
Natomas Park, CA, Sacramento, CA	64.0 °F	50 °F 	61%	 SE   at  5.0 mph 	0.00 in / hr	40 ft	2 sec ago	Rapid Fire	 
APRSWXNET Sacramento CA , Sacramento, CA	62 °F 	49 °F 	63%	 East   at  0 mph 	0.00 in / hr	65 ft	29 min 42 sec ago	MADIS	
Pocket, Sacramento, CA	59.0 °F 	52 °F 	77%	 SSE   at  2.7 mph 	 - / hr	10 ft	9 min 15 sec ago	Normal	 
MesoWest Sacramento-Del Paso Manor , Sacramento, CA	64 °F 	54 °F 	70%	 SE   at  2 mph 	0.00 in / hr	125 ft	1 hr 33 min 42 sec ago	MADIS	
Rosemont 2, Sacramento, CA	60.4 °F	50 °F 	69%	 SE   at  0.0 mph 	0.00 in / hr	53 ft	3 sec ago	Normal	 
Maddox Park/Carmichael, Carmichael, CA	61.2 °F 	37 °F 	40%	 ESE   at  2.7 mph 	0.00 in / hr	98 ft	32 sec ago	Normal	 
APRSWXNET Carmichael CA , Sacramento, CA	63 °F 	52 °F 	68%	 SE   at  0 mph 	0.00 in / hr	55 ft	40 min 42 sec ago	MADIS	
MesoWest BRANCH CENTER , Sacramento, CA	64 °F 	 - 	-	 North   at   - 	0.00 in / hr	75 ft	3 hr 58 min 42 sec ago	MADIS	
MesoWest Bombay , Elverta, CA	60 °F 	 - 	-	 North   at   - 	0.00 in / hr	29 ft	53 min 42 sec ago	MADIS	
Foothill Farms, CA, Sacramento	66.2 °F	52 °F 	60%	 ESE   at  0.0 mph 	0.00 in / hr	117 ft	26 sec ago	Normal	 
Carmichael Colony Neighborhood Assoc., Carmichael, CA	59.7 °F 	49 °F 	68%	 SE   at  0.0 mph 	0.00 in / hr	140 ft	8 sec ago	Rapid Fire	 
MesoWest SACRAMENTO METRO AIRPORT , Sacramento, CA	63 °F 	 - 	-	 North   at   - 	0.00 in / hr	20 ft	1 hr 23 min 42 sec ago	MADIS	
Arcade Ck. Park, Carmichael, CA	63.6 °F 	52 °F 	65%	 WSW   at  0.0 mph 	0.00 in / hr	95 ft	14 sec ago	Rapid Fire	 
Ruama Station - Dartford/Jacinto, Sacramento, CA	63.2 °F	50 °F 	63%	SE  at  1.8 mph 	0.00 in / hr	25 ft	4 sec ago	Rapid Fire	 
Antelope Run, Antelope, CA	65.5 °F 	51 °F 	60%	ESE  at  0.0 mph 	0.00 in / hr	69 ft	2 sec ago	Rapid Fire	
Near Riverview School, Rancho Cordova, CA	64.9 °F 	48 °F 	54%	East  at  1.6 mph 	0.00 in / hr	93 ft	51 sec ago	Rapid Fire	
APRSWXNET El Macero CA , El Macero, CA	58 °F 	51 °F 	78%	 South   at  2 mph 	0.00 in / hr	59 ft	39 min 42 sec ago	MADIS	
Laguna Blvd near Franklin Blvd, Elk Grove, CA	60.4 °F 	42 °F 	51%	 North   at  0.0 mph 	0.00 in / hr	30 ft	19 sec ago	Rapid Fire	 
MAP FINCH FARMS (P268), CA , El Macero, CA	59 °F 	50 °F 	71%	 West   at  4 mph 	0.00 in / hr	22 ft	33 min 42 sec ago	MADIS	
Firestone, Antelope, CA, Antelope, CA	65.5 °F 	51 °F 	59%	 East   at  3.0 mph 	0.00 in / hr	155 ft	3 min 11 sec ago	Normal	 
APRSWXNET Elk Grove CA , Elk Grove, CA	61 °F 	53 °F 	76%	 SSW   at  0 mph 	0.00 in / hr	167 ft	39 min 42 sec ago	MADIS	

Washington DC

Washington, DC
5:28 AM EDT on July 25, 2012 (GMT -0400)
Elev: 75 ft 
Lon: 77.0° W
Lat: 38.9° N
Source		Rapid Fire Updates™		Updated 4:52 AM EDT 	

Tropical Weather: Invest 98l  (North Atlantic) Invest 90e  (East Pacific) 


Weather Underground Broadcast Network
 Washington Weather at a Glance 
Weather Station
Washington (KDCA)
Elevation
13 ft 
Station Select
Now

Clear
Temperature
74 °F 
Feels Like 74 °F 
Wind(mph)
9
Sunrise / Set
6:03 AM
8:25 PM

Weather Stations Station Location	Temp.	Heat Index	Dew Point	Humidity	Wind	Precipitation	Elevation	Updated	Type	Website
Eckington Pl, NE, Washington, DC	74.2 °F 	76 °F 	62 °F 	66%	 North   at  4.0 mph 	0.00 in / hr	90 ft	5:28 AM EDT	Normal	 
NoMa - H Street Corridor, Washington, DC	73.6 °F 	76 °F 	61 °F 	65%	 NNW   at  2.0 mph 	0.00 in / hr	56 ft	5:28 AM EDT	Rapid Fire	 
DCNet DC Municipal Building Washington D, Washington, DC	73 °F 	76 °F 	59 °F 	62%	 NNW   at  6 mph 	0.00 in / hr	304 ft	5:00 AM EDT	MADIS	
DCNet Hoover Building Washington DC, Washington, DC	76 °F 	78 °F 	60 °F 	57%	 NE   at  9 mph 	0.00 in / hr	231 ft	5:00 AM EDT	MADIS	
SW Washington, Washington, DC	75.3 °F 	77 °F 	63 °F 	65%	 NNE   at  3.0 mph 	0.00 in / hr	22 ft	5:18 AM EDT	Normal	 
NOS_PORTS Washington, DC, Washington, DC	 - 	-	 - 	-	 NNE   at  5 mph 	0.00 in / hr	0 ft	4:54 AM EDT	MADIS	
VADOT Rt_66_@_Rosslyn, Arlington, VA	75 °F 	77 °F 	59 °F 	58%	 East   at  1 mph 	0.00 in / hr	132 ft	4:41 AM EDT	MADIS	
Takoma, DC, Washington, DC	70.0 °F 	-	64 °F 	82%	 North   at  0.0 mph 	0.00 in / hr	310 ft	5:28 AM EDT	Rapid Fire	 
Palisades, Washington, DC	68.2 °F 	-	46 °F 	45%	 North   at  0.0 mph 	0.00 in / hr	211 ft	5:23 AM EDT	Normal	 
Cherrydale, Arlington, VA	71.3 °F 	72 °F 	65 °F 	80%	 NNW   at  0.0 mph 	0.00 in / hr	265 ft	5:25 AM EDT	Normal	 
Ashton Heights, Arlington, VA	73.2 °F 	73 °F 	68 °F 	83%	 North   at  0.7 mph 	0.00 in / hr	302 ft	5:15 AM EDT	Normal	
Glaizewood Manor, Takoma Park, MD	67.6 °F 	-	64 °F 	87%	 West   at  0.0 mph 	0.00 in / hr	175 ft	5:28 AM EDT	Rapid Fire	
Ashton Heights, Arlington, VA	72.4 °F 	75 °F 	62 °F 	70%	 SW   at  1.0 mph 	0.00 in / hr	258 ft	5:00 AM EDT	Normal	 
Brookdale, Bethesda, MD	67.0 °F 	-	60 °F 	79%	 WNW   at  0.0 mph 	0.00 in / hr	262 ft	5:25 AM EDT	Normal	 
Riverdale Park, Riverdale, MD	71.4 °F 	74 °F 	62 °F 	72%	 North   at  1.0 mph 	0.00 in / hr	122 ft	5:28 AM EDT	Rapid Fire	
Somerset, Chevy Chase, MD	68.1 °F 	-	62 °F 	82%	 NE   at  0.0 mph 	0.00 in / hr	330 ft	5:25 AM EDT	Normal	
Douglas Park, Arlington, VA	71.0 °F 	73 °F 	62 °F 	73%	 WNW   at  0.0 mph 	0.00 in / hr	183 ft	5:28 AM EDT	Rapid Fire	
APRSWXNET Douglas Park VA , Arlington, VA	72 °F 	74 °F 	62 °F 	72%	 NW   at  0 mph 	0.00 in / hr	183 ft	4:58 AM EDT	MADIS	
Alexandria, VA, Alexandria, VA	73.1 °F 	76 °F 	62 °F 	67%	 SSW   at  0.2 mph 	0.00 in / hr	174 ft	5:28 AM EDT	Rapid Fire	
Del Ray, Alexandria, VA	73.7 °F 	75 °F 	64 °F 	72%	 WNW   at  0.0 mph 	 - / hr	24 ft	5:28 AM EDT	Normal	
Barcroft Neighborhood, Arlington, VA	68.9 °F 	-	63 °F 	82%	 North   at  0.0 mph 	0.00 in / hr	200 ft	5:28 AM EDT	Rapid Fire	 
DCNet Naval Research Laboratory Washingt, Washington, DC	75 °F 	78 °F 	58 °F 	55%	 North   at  6 mph 	0.00 in / hr	119 ft	5:00 AM EDT	MADIS	
Old Town North, Alexandria, VA	73.7 °F 	76 °F 	62 °F 	67%	 North   at  0.0 mph 	0.00 in / hr	18 ft	5:26 AM EDT	Normal	 
Del Ray -- Mason Ave, Alexandria, VA	72.9 °F 	75 °F 	62 °F 	68%	 NE   at  0.0 mph 	0.00 in / hr	46 ft	5:25 AM EDT	Normal	
APRSWXNET Silver Spring MD , Silver Spring, MD	67 °F 	-	63 °F 	88%	 SSE   at  0 mph 	0.00 in / hr	347 ft	4:57 AM EDT	MADIS	
Arlington, VA	69.1 °F 	-	62 °F 	77%	 NW   at  1.0 mph 	0.00 in / hr	300 ft	5:22 AM EDT	Normal	 
Rosemont - Braddock Heights, Alexandria, VA	72.5 °F 	73 °F 	65 °F 	77%	 NNW   at  0.0 mph 	0.00 in / hr	33 ft	5:22 AM EDT	Rapid Fire	
Rosemont Park, Alexandria, VA	73.6 °F 	76 °F 	62 °F 	67%	 SW   at  0.0 mph 	0.00 in / hr	26 ft	5:13 AM EDT	Normal	 
Episcopal High School, Alexandria, VA	73.0 °F 	76 °F 	59 °F 	62%	 North   at  1.0 mph 	0.00 in / hr	290 ft	5:25 AM EDT	Normal	
MDDOT I-495 @ Connecticut Ave, Bethesda, MD	71 °F 	72 °F 	64 °F 	79%	 West   at  0 mph 	0.00 in / hr	230 ft	5:11 AM EDT	MADIS	
Greenwich Forest, Bethesda, MD	66.6 °F 	-	63 °F 	89%	 West   at  0.0 mph 	0.00 in / hr	338 ft	5:28 AM EDT	Rapid Fire	
Seminary Ridge - St Stephens & St. Agnes, Alexandria, VA	73.0 °F 	74 °F 	66 °F 	78%	 WNW   at  0.0 mph 	0.00 in / hr	268 ft	5:28 AM EDT	Rapid Fire	
Colonial Heights, Alexandria, VA	73.2 °F 	75 °F 	62 °F 	69%	 NNW   at  0.0 mph 	0.00 in / hr	140 ft	5:28 AM EDT	Rapid Fire	
Camp Springs, MD, Camp Springs, MD	72.5 °F 	73 °F 	65 °F 	78%	 NNE   at  3.0 mph 	0.00 in / hr	282 ft	5:00 AM EDT	Normal	 
APRSWXNET McLean VA , McLean, VA	68 °F 	-	65 °F 	90%	 NNE   at  0 mph 	0.00 in / hr	265 ft	5:03 AM EDT	MADIS	

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About E.M.Smith

A technical managerial sort interested in things from Stonehenge to computer science. My present "hot buttons' are the mythology of Climate Change and ancient metrology; but things change...
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14 Responses to More Airports Hotter Than ‘nearby’ Stations

  1. E.M.Smith says:

    On Wunderground you can click on a “select station’ button up near the top when looking at any particular station and it will make a map with the first 10 choices on it. They look to me like they are the same stations as in the list lower down of ‘nearby’ stations.

    There is a toggle near the bottom of the map that lets you display the next 10, and the next…

    Inspection of those maps looks like Wunderground does a ‘sort of a spiral out’ method.

    That, then, explains the general downslope to the trend lines…

    The further you get from the large airport and all the urban growth that is nearby, the cooler your general temperatures become.

    By selecting GHCN stations from mostly Airports, NCDC build in a large warming bias compared to the nearby stations, and more or less linear with distance (with some spread). The “outlier” stations are due to cities and land forms not being uniform (and by the time you are in the third 10 you can be looking at much different topology and elevation. (But even then, that says the airports are in hotter locations that the other instruments. Locations that were not always concrete and asphalt…)

    At any rate, one small mystery solved… It also says that picking airports in the midwest and other planes areas can give a nice topology (i.e. altitude) neutral Airport Heat Island metric… At least as long as there is someone nearby with thermometers…

  2. p.g.sharrow says:

    Another mystery solved. Cats love to nap on large rocks, even if they are well buried and not tall. Cats have a body temperature of 101.5F and love warmth. Large rocks are excellent solar energy collectors, with large heat storage as well. The cats know!
    Out in fields, large rocks melt the snow off of themselves before the ground clears.
    Well paved air fields are a solar energy collection engines as the paving is very thick, feet thick at times, and the sub material is rock & gravel and very compacted soils. pg

  3. adolfogiurfa says:

    Anyway in december they will be cooler, for sure :-)

  4. E.M.Smith says:

    @P.G. Sharrow:

    Perhaps that’s it… the Warmistas are all cat lovers and place thermometers where cats will like them ;-)

    @Adolfo:

    Don’t count on it… Don’t have the graphs made yet, but grabbed some data from Australia… It’s winter down there now…

    Perth is a short list, so you can “eyeball” it pretty easy. Perth-Morley is hotter than the airport, but everything else is cooler (that first number after each name) and tend to smaller with greater distance…:

    Perth Weather at a Glance
    Weather Station Perth (YPPH)
    Elevation 66 ft
    Station Select
    Now
    Clear
    Temperature
    64 °F
    Feels Like 64 °F
    Wind(mph)
    7
    Sunrise / Set
    7:08 AM
    5:37 PM

    Weather Stations Station Location Temp. Dew Point Humidity Wind Precipitation Elevation Updated Type Website
    Perth 63.5 °F 48 °F 56% SW at 0.1 mph 0.00 in / hr 138 ft 0 sec ago Rapid Fire
    Morley, Perth 66.4 °F 42 °F 41% South at 2.2 mph 0.00 in / hr 125 ft 9 min 58 sec ago Normal
    Beckenham 62.8 °F 50 °F 61% South at 2.2 mph 0.00 in / hr 36 ft 5 sec ago Normal
    APRSWXNET Ballajura , Mount Lawley Perth 64.0 °F 42 °F 46% ESE at 0.0 mph 0.00 in / hr 124 ft 1 min 31 sec ago MADIS
    Ballajura, Ballajura 63.7 °F 42 °F 46% ESE at 0.0 mph 0.00 in / hr 120 ft 14 min 17 sec ago Normal
    Jane Brook 62.9 °F 47 °F 56% WSW at 0.0 mph 0.00 in / hr 0 ft 17 sec ago Rapid Fire
    Lynwood, Lynwood 62.1 °F 28 °F 27% North at 2.0 mph 0.00 in / hr 39 ft 6 min 6 sec ago Normal
    Osborne Park, Osborne Park 60.4 °F 44 °F 54% WSW at 5.3 mph 0.00 in / hr 66 ft 4 min 54 sec ago Normal
    Darlington, Darlington 58.3 °F 46 °F 63% SSW at 0.0 mph 0.00 in / hr 623 ft 1 sec ago Rapid Fire
    APRSWXNET Wannaroo , Mount Lawley Perth 62.0 °F 22 °F 23% West at 2.0 mph 0.00 in / hr 247 ft 2 min 5 sec ago MADIS
    Perth 59.5 °F 46 °F 60% North at 0.0 mph 0.00 in / hr 0 ft 25 min 0 sec ago Normal
    Willetton, Perth 60.3 °F 45 °F 57% SW at 0.0 mph 0.00 in / hr 50 ft 10 min 8 sec ago Normal
    Maddington 64.0 °F 45 °F 50% SW at 5.0 mph 0.00 in / hr 52 ft 7 min 57 sec ago Normal
    Gosnells 62.4 °F 46 °F 55% SW at 2.2 mph 0.00 in / hr 66 ft 9 min 25 sec ago Normal
    Willetton, Willetton 60.4 °F 46 °F 60% SW at 3.8 mph 0.00 in / hr 100 ft 9 min 16 sec ago Normal
    Willetton, Willetton 60.4 °F 46 °F 59% SW at 0.0 mph 0.00 in / hr 150 ft 7 min 12 sec ago Normal
    Huntingdale 61.7 °F 48 °F 60% South at 1.6 mph 0.00 in / hr 0 ft 4 min 27 sec ago Normal
    Karrinyup, Karrinyup 61.3 °F 37 °F 41% SW at 2.9 mph 0.00 in / hr 197 ft 3 sec ago Rapid Fire
    Ellenbrook, ELLENBROOK 62.9 °F 42 °F 46% SSE at 2.0 mph 0.00 in / hr 184 ft 4 min 17 sec ago Normal
    Greenwood, Perth 59.7 °F 41 °F 51% SSE at 2.5 mph 0.00 in / hr 52 ft 0 sec ago Rapid Fire
    Perth Hills, MUNDARING 54.0 °F 44 °F 69% ENE at 0.0 mph 0.00 in / hr 968 ft 32 sec ago Rapid Fire
    Wanneroo, Wanneroo 60.3 °F 42 °F 52% SSW at 0.7 mph 0.00 in / hr 217 ft 5 sec ago Rapid Fire
    Wanneroo, Wanneroo 60.1 °F 41 °F 49% SSW at 0.0 mph 0.00 in / hr 90 ft 54 sec ago Normal
    Wanneroo East, Wanneroo 59.7 °F 44 °F 58% North at 0.0 mph 0.00 in / hr 256 ft 1 sec ago Rapid Fire
    By the Indian Ocean, Spearwood 60.8 °F 32 °F 34% South at 4.0 mph 0.00 in / hr 50 ft 4 min 31 sec ago Normal
    Kinross, Kinross 60.3 °F 44 °F 56% South at 5.0 mph 0.00 in / hr 125 ft 5 sec ago Rapid Fire
    KWINANA, WELLARD 63.9 °F 43 °F 46% SW at 0.7 mph 0.00 in / hr 108 ft 4 min 59 sec ago Normal

  5. p.g.sharrow says:

    EMSmith says;”Perhaps that’s it… the Warmistas are all cat lovers”
    I doubt that, Warmistas hate warmth and wish it cold.
    I am a lion …er Leo and a farmer. I hate cold and love heat. More heat and CO2 the better for plants and me 8-) Too bad that a mini Ice Age is on its’ way. pg

  6. G. Combs says:

    p.g.sharrow says: @ 27 July 2012 at 2:05 pm

    …Large rocks are excellent solar energy collectors, with large heat storage as well. The cats know!
    Out in fields, large rocks melt the snow off of themselves before the ground clears….
    _________________________________
    Anyone who has had to shovel a driveway up north and is a bit lazy knows the simplest way to get it clear down to the pavement is to clear off most of the snow and then dig to bare pavement in a few patches and the sun will do the rest of the clearing for you.

  7. p.g.sharrow says:

    G. Combs says that if you live in snow country and are lazy, you need to get the work done with out killing yourself doing ALL the work. Being a lazy man that has lived out in snow country for many years, getting roads and trails cleared with the least effort is most important. Getting the best help from the weak winter sun is part of the challenge. 8-) pg

  8. ArndB says:

    RE….“in Hawaii, temperatures don’t change much“…..

    Two years ago I compared the two Honolulu stations: Observatory (Obs Oahu) vs Air Port: here http://www.what-is-climate.com/Archiv/sept_10.html. The deviation at Obs Oahu might have been due to a broken sensor, but might have got some input due to the special location very close to the biggest naval port ever in the mid 1940s, as the station is:
    ___which is close to the entrance of Pearl Harbour,
    ___is very close to a sea area, where presumably enormous naval activities during and after WWII took place, that can have changed the ‘sea-surface structure’ in more than one way, e.g. the sea of Obs is fairly deep, with much colder water just below the sea surface, or: the day time warming of the sea surface was quickly replace by colder (not sun warmed) water.
    ___the extraordinary drop from 1945 to 1949, coincides with size of the US Navy at Honolulu.
    ___It would be too easy to assume a malfunction of the measurements, although not totally impossible, but that would objectively mean that the people running the Obs must have been completely ignorant and incompetent not to recognising it.
    ___If Obs temperature have been taken correctly (and that seems to be the case as the station was presumably never moved, but only the institutions running Obs changed a few times), and also the airport measurements, than it should be possible to identify a reason for the difference,
    ___which would be particularly helpful in the climatic change debate, and even more, if naval activities caused the air temperature to drop dramatically „Honolulu Obs Oahu“ from 1945 to 1949.
    The reasoning had been also once a comment at: http://climateaudit.org/2010/09/01/icoads-hawaii/#comment-240663

  9. tckev says:

    E.M.
    You seem to have started something here with Steven Goddard ( http://stevengoddard.wordpress.com/2012/07/29/another-eureka-moment/ )
    and Anthony Watts (http://wattsupwiththat.com/2012/07/29/press-release-2/ ) doing similar things and coming to very similar conclusions.
    It looks like even the raw data from a lot of urban and airports sites is suspect.

  10. P.G. Sharrow says:

    When the BEST group came out with their first report and Muller said that UHI was not a problem because they adjusted cool stations up to match the warm stations. My opinion became, this was no longer possible poor book keeping, this was deliberately cooking the books. As they are all doing the same thing, conspiracy. The Watts et al. paper is further proof. The EM Smith evaluations point to the same thing. The Official Data records are being adjusted to match the story line of AGW because GOD is not cooperating with their computer models. pg

  11. Pascvaks says:

    Just because there are ‘scientists’ in NOAA doesn’t mean they (aka ‘We’) have the cream of the crop, nor that they (‘We’) have those with the highest integrity. Goberment ‘scientists’ are as suseptable to pressure as everything and everyone else in the Universe is. One rotten apple will spoil the bunch, and a bunch of rotten apples will spoil a heck of a lot more than apples.

  12. E.M.Smith says:

    @P.G. Sharrow:

    Lucky for you that an Ice Age has gradual onset over thousands of years. Plenty of time to chop more wood and / or move to Mexico ;-)

    @G. Combs:

    Interesting point… NOT living where it snows, I only get to see such things when visiting ‘snow country’. I remember seeing such patches of melt spreading, but hadn’t made the connection to ‘climate stuff’ now… Thanks for making the connection.

    @Another Ian:

    No, I’d missed that. Thanks for pointing it out. That is one powerful direct comparison of two data sets that are SUPPOSED to be the same quality… showing completely different things…

    It deserves a lot more coverage…

    @ArndB:

    An interesting conundrum… I don’t have much to add in the way of clarity.

    About all I can do is point out some “issues”. Change from buckets to engine intake. (And a potential change of depth of water measured). Airport data being biased high. Potential for deep draft ships to stir cold water to near the surface (as all those carriers and battle ships headed home). And the potential for ‘regime change’ in ocean currents in the mid Pacific.

    In other words, it’s a mess.

    But an interesting on, especially that Pearl Harbor ‘glitch’ down…

    @Tckev:

    Suspect? I don’t think it is “suspect”, I think it is clearly broken. ANY data from an airport or from an urban jungle is measuring the thermal mass of concrete, tarmac, and cars and the heat dump of megaWatts of electricity and tons of fossil fuel burn.

    As to me starting it: Maybe. I did do some Airport postings a couple of years back and they have had time to spread ideas. Then again, those two are bright folks and already knew that thermometer site issues mattered, so would have thought of it on their own anyway. Personally, I think of us all as just “fellow travelers” looking out the window and seeing the same things. If one says “Hey, look at the airport!”, the others were likely already noticing it anyway. (But I can still feel good about having pointed at it early ;-)

    @P.G.:

    I got that feeling back when I first looked at GIStemp UHI adjustment and found it often going the wrong way… (though it is an automated error…)

    http://chiefio.wordpress.com/2009/08/30/gistemp-a-slice-of-pisa/

    @Pascvaks:

    I suspect it is even worse than that. We have folks with a clear bias and political agenda in charge of the hiring… Hansen has testified that it is OK to break the law if you believe you are doing it for a ‘greater good’ (and the nutty UK courts bought that… setting a precedent…) and has gotten himself arrested in showing off his Green Credentials. Others in the AGW movement are just as rabid.

    It is a cultural bias that will pervade their organizations.

    So it isn’t just ANY ‘rotten apple’, it tends to be the top dogs that are the ‘rotten apples’; and they will have strong and direct influence on the entirety of what forms below them.

    Even if just indirectly. Were I a low level researcher on their staff, I’d have a keen sense of what they will ‘sign off’ and what they will dump. I’d not even bother bringing to the budget table a request to show their life work was bogus… or even trivially needing ‘enhancement’. I’d bring what I knew would get funding. (And just hope I could find a way to stay honest and moral while “sucking up” to the feeding trough… And I’m one of the folks “most likely to annoy the boss with the truth” that you will ever find.)

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