82F in san diego not bad for mid DEC.......

[trioderob]

82f today inland

now if it could just stay this warm

Edited December 18, 2009 by trioderob

[MattyB]

Take your thermometer out of the sun dude.

[trioderob]

Take your thermometer out of the sun dude.

not my report "bro"

its from the weather service near san diego state

here is the link:

http://www.wunderground.com/US/CA/La_Mesa.html

Edited December 18, 2009 by trioderob

[MattyB]

Clicking around a lot of stations it looks like a lot of people have their sensors next to pavement or out in the sun. Several stations were reading 89F. The actual temp is about 78F or 79F in the Lemon Grove, La Mesa, College, Spring Valley area. Sorry, to jump on you but people having sensors out in the sun is one of my pet peaves. My dad will do that. It'll be 65F out and he's sayin' "wow, it's warming up pretty good out there. It's 80F" Yeah, ya think the fact that your sensor is mounted on the east wall of the house in direct sun might have something to do with that? Hey, it's 400F in my oven, must be the temp in my neighborhood.

[joe_OC]

Hey, I extremely happy that it is 73 degrees here...

[KMartin]

I put my sensor in the sun before and got over 120 in the Summer when it was "only 100" Awesome readings at times.

[epicure3]

I have a sensor in the sun and mine read 92F. The other in the shade read 78.6F (warm location in the yard). All in all, a very nice day. Going to be nice tomorrow as well.

[MattyB]

If one more person gives a reading from a sensor in the sun I'm gonna.... (I died)

[mnorell]

Matt--

As far as I know wunderground only accepts readings from regulation weather-stations having professional radiation shielding. Readings from these stations (Vantage Pro, etc.) are quite accurate and I suspect that if there were false readings it was due to faulty equipment. My station is a Davis Vantage Pro 2 and its shielding does an amazing job. I'm on wunderground as well, and I often look around the wundermap for anomolous readings. There is amazing consistency from these pro stations, and when they are off they seem to be WAY off, and thus I think some equipment fault can usually be put to blame.

Is it not possible, if this is a Santa Ana going on (as it must be), that some of the lowest spots in El Cajon or other inland areas could be significantly warmer than surrounding areas due to compressional warming? Santa Anas typically yield crazy temps within short distances due to elevation and wind-patterns...that's my suspicion in this instance, at least.

The problem with using inexpensive, non-shielded sensors (aside from their inaccuracy) is that one must put them under trees or eaves and thus nighttime temp-readings in winter don't accurately reflect the air-temp in the open, but rather the higher temp under canopy.

[happ]

Actually the warmest temps in the state occurred in San Diego county today:

Santee: 83F\ 28.3C

Wild Animal Pk: 85F\ 29.4C

[epicure3]

If one more person gives a reading from a sensor in the sun I'm gonna.... (I died)

Curreently 61.7F, but that's in full moonlight. Reading might be a little off with the moonlight.

[epicure3]

Matt--

As far as I know wunderground only accepts readings from regulation weather-stations having professional radiation shielding. Readings from these stations (Vantage Pro, etc.) are quite accurate and I suspect that if there were false readings it was due to faulty equipment. My station is a Davis Vantage Pro 2 and its shielding does an amazing job. I'm on wunderground as well, and I often look around the wundermap for anomolous readings. There is amazing consistency from these pro stations, and when they are off they seem to be WAY off, and thus I think some equipment fault can usually be put to blame.

Is it not possible, if this is a Santa Ana going on (as it must be), that some of the lowest spots in El Cajon or other inland areas could be significantly warmer than surrounding areas due to compressional warming? Santa Anas typically yield crazy temps within short distances due to elevation and wind-patterns...that's my suspicion in this instance, at least.

The problem with using inexpensive, non-shielded sensors (aside from their inaccuracy) is that one must put them under trees or eaves and thus nighttime temp-readings in winter don't accurately reflect the air-temp in the open, but rather the higher temp under canopy.

It was generally an gentle offshore flow but I wouldn't characterize it as a Santa Ana.

[BS Man about Palms]

If one more person gives a reading from a sensor in the sun I'm gonna.... (I died)

Curreently 61.7F, but that's in full moonlight. Reading might be a little off with the moonlight.

[freakypalmguy]

Not exactly correct Michael. This station says it was from an Oregon Scientific unit. Weather underground does not verify the presence any shielding, don't know if they require it either. Davis are the best at +/- 1F, while many are +/-2 F, and a few are ever +/-2 to 6 F which is getting a bit sloppy.

Matt--

As far as I know wunderground only accepts readings from regulation weather-stations having professional radiation shielding. Readings from these stations (Vantage Pro, etc.) are quite accurate and I suspect that if there were false readings it was due to faulty equipment. My station is a Davis Vantage Pro 2 and its shielding does an amazing job. I'm on wunderground as well, and I often look around the wundermap for anomolous readings. There is amazing consistency from these pro stations, and when they are off they seem to be WAY off, and thus I think some equipment fault can usually be put to blame.

Is it not possible, if this is a Santa Ana going on (as it must be), that some of the lowest spots in El Cajon or other inland areas could be significantly warmer than surrounding areas due to compressional warming? Santa Anas typically yield crazy temps within short distances due to elevation and wind-patterns...that's my suspicion in this instance, at least.

The problem with using inexpensive, non-shielded sensors (aside from their inaccuracy) is that one must put them under trees or eaves and thus nighttime temp-readings in winter don't accurately reflect the air-temp in the open, but rather the higher temp under canopy.