Texas winter wx thread (2009-2010)

[Ntxw]

when the precip begins, how much cooling CAN take place at the surface?

I'll be keeping an eye on the san angelo and abilene stations as they appear to have the same temp, but abilene with lt snow.

I've noticed San Angelo's dewpoint is at 33 degrees...doesn't look like much cooling for that.

[aubrn34]

when the precip begins, how much cooling CAN take place at the surface?

I'll be keeping an eye on the san angelo and abilene stations as they appear to have the same temp, but abilene with lt snow.

I not a met so someone correct me if I'm wrong, but wet-bulbing will cause the temps to fall about half-way between the pre-precipitation temperature and dew point. Right now it is 36 in Dallas with a dew point at 30 so a 2-3 degree temperature drop can be expected when the precipitation starts.

[Ntxw]

when the precip begins, how much cooling CAN take place at the surface?

I'll be keeping an eye on the san angelo and abilene stations as they appear to have the same temp, but abilene with lt snow.

I not a met so someone correct me if I'm wrong, but wet-bulbing will cause the temps to fall about half-way between the pre-precipitation temperature and dew point. Right now it is 36 in Dallas with a dew point at 30 so a 2-3 degree drop can be expected when the precipitation starts.

Im not sure exactly how the dew point drops, I think usually with dry air in place. But yes the temperature drops closer to the dew point as moisture pulls in and the temperature cannot drop lower than the dew point.

[iorange55]

Lol is something going on in San Angelo? It seems like there is a little circle around them where it just won't snow. Like a little heat island, or something.

[Ntxw]

Lol is something going on in San Angelo? It seems like there is a little circle around them where it just won't snow. Like a little heat island, or something.

That's what you call dumb luck maybe it's gore shooting up his heat generator laser!

[CaptinCrunch]

when the precip begins, how much cooling CAN take place at the surface?

I'll be keeping an eye on the san angelo and abilene stations as they appear to have the same temp, but abilene with lt snow.

I not a met so someone correct me if I'm wrong, but wet-bulbing will cause the temps to fall about half-way between the pre-precipitation temperature and dew point. Right now it is 36 in Dallas with a dew point at 30 so a 2-3 degree drop can be expected when the precipitation starts.

Im not sure exactly how the dew point drops, I think usually with dry air in place. But yes the temperature drops closer to the dew point as moisture pulls in and the temperature cannot drop lower than the dew point.

temps will drop to about 31 in dfw when precip starts.

[Portastorm]

Of interest ...

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
911 AM CST TUE DEC 29 2009

.UPDATE...
UPDATED 1ST PERIOD FORECAST TO INCLUDE A MENTION OF SLEET IN
ADDITION TO SNOW AND RAIN DUE TO RECENT REPORTS WEST OF I-35. ALSO
INCREASED 1ST PERIOD POPS TO 100 PERCENT ACROSS THE EASTERN HILL
COUNTRY AND I-35 CORRIDOR. LITTLE TO NO SLEET/SNOW ACCUMULATION IS
EXPECTED.

[Ntxw]

Of interest ...

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
911 AM CST TUE DEC 29 2009

.UPDATE...
UPDATED 1ST PERIOD FORECAST TO INCLUDE A MENTION OF SLEET IN
ADDITION TO SNOW AND RAIN DUE TO RECENT REPORTS WEST OF I-35. ALSO
INCREASED 1ST PERIOD POPS TO 100 PERCENT ACROSS THE EASTERN HILL
COUNTRY AND I-35 CORRIDOR. LITTLE TO NO SLEET/SNOW ACCUMULATION IS
EXPECTED.

If that heavy precip makes it's way north along I-35 WOW! Forget Virga lol

[iorange55]

Of interest ...

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
911 AM CST TUE DEC 29 2009

.UPDATE...
UPDATED 1ST PERIOD FORECAST TO INCLUDE A MENTION OF SLEET IN
ADDITION TO SNOW AND RAIN DUE TO RECENT REPORTS WEST OF I-35. ALSO
INCREASED 1ST PERIOD POPS TO 100 PERCENT ACROSS THE EASTERN HILL
COUNTRY AND I-35 CORRIDOR. LITTLE TO NO SLEET/SNOW ACCUMULATION IS
EXPECTED.

If that heavy precip makes it's way north along I-35 WOW! Forget Virga lol

Yeah looks like its headed right towards us although I'd imagine it'll weaken some as the models have been hinting, but so far it's held up nicely.

[Ntxw]

Remember the heavy snow the falls and okc got, I remember the heavy precip developing with embedded thunder down here and the low pulled it north into their areas where it just sat and snowed lights out.

[Portastorm]

No sleet in downtown Austin at 9:30 a.m. but a cold, light rain. Temp is 43 degrees.

I haven't heard/seen any sleet reports yet from the hills west of town but they must be coming in based on what our local NWSFO says.

[CaptinCrunch]

Of interest ...

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
911 AM CST TUE DEC 29 2009

.UPDATE...
UPDATED 1ST PERIOD FORECAST TO INCLUDE A MENTION OF SLEET IN
ADDITION TO SNOW AND RAIN DUE TO RECENT REPORTS WEST OF I-35. ALSO
INCREASED 1ST PERIOD POPS TO 100 PERCENT ACROSS THE EASTERN HILL
COUNTRY AND I-35 CORRIDOR. LITTLE TO NO SLEET/SNOW ACCUMULATION IS
EXPECTED.

If that heavy precip makes it's way north along I-35 WOW! Forget Virga lol

Yeah looks like its headed right towards us although I'd imagine it'll weaken some as the models have been hinting, but so far it's held up nicely.

THAT HEAVY PRECIP WILL COOL THE LOWER LEVELS NICELY, SHOULD DROP TEMPS FASTER AND EARIER THAN FORCASTED, MAY ALSO HELP TO INCREASE SNOW TOTALS ACROSS DFW. CURRENT TEMP IS 35 DEGREES IN DT FTW

[Ntxw]

I don't understand lol it's 36 with a 34 dewpoint in Midland and it's been snowing all morning yet San Angelo is cooler\relatively the same on both fronts and are in a rain donut hole.

[Portastorm]

This may bode well for y'all up north but reports now coming in of sleet falling in SW Austin and northwest of town in Cedar Park. Snow flurries reported out in Fredericksburg. We weren't supposed to get ANY sleet.

I wouldn't get too excited yet because these are just sporadic reports but it still shows this system is a bit more stout and perhaps colder in the lower levels of the atmosphere than projected.

[Weatherdude20]

NOW: snow band from abilene to san angelo... Heavy rain mixed with sleet north west of Austin. And mixed snow/sleet in granbury area south west of FTW...

LATER : West of I-35 2-4 inches... East of I-35 to Dallas 1-3 inches... East of Dallas 1-2 inches Max. south towards waco expect slightly warmer temps but heaver precip,more of a mix precip through 4:00pm then turning to all snow before its all said and done...

THINGS TO LOOK OUT FOR : Temps,roads, and evaporative cooling...

[rkbjunior]

No sleet in downtown Austin at 9:30 a.m. but a cold, light rain. Temp is 43 degrees.

I haven't heard/seen any sleet reports yet from the hills west of town but they must be coming in based on what our local NWSFO says.

I work in North Austin and we were getting some light sleet mixed in with the rain about 15 minutes ago.

[Portastorm]

No sleet in downtown Austin at 9:30 a.m. but a cold, light rain. Temp is 43 degrees.

I haven't heard/seen any sleet reports yet from the hills west of town but they must be coming in based on what our local NWSFO says.

I work in North Austin and we were getting some light sleet mixed in with the rain about 15 minutes ago.

BTW, welcome to S2K! Great to have another Austin-area member. Yeah you may have seen my more recent post. Sleet being reported just southwest and northwest of the city proper.

[WacoWx]

thanks for all of the reports. Keep 'em coming!! things are starting to pick up nicely.

[srainhoutx]

This may bode well for y'all up north but reports now coming in of sleet falling in SW Austin and northwest of town in Cedar Park. Snow flurries reported out in Fredericksburg. We weren't supposed to get ANY sleet.

I wouldn't get too excited yet because these are just sporadic reports but it still shows this system is a bit more stout and perhaps colder in the lower levels of the atmosphere than projected.

Keep us posted Portastorm. Radar suggests sleet falling along the I-10 corridor near San Antonio as well as the I-35 corridor.

[iorange55]

NOW: snow band from abilene to san angelo... Heavy rain mixed with sleet north west of Austin. And mixed snow/sleet in granbury area south west of FTW...

LATER : West of I-35 2-4 inches... East of I-35 to Dallas 1-3 inches... East of Dallas 1-2 inches Max. south towards waco expect slightly warmer temps but heaver precip,more of a mix precip through 4:00pm then turning to all snow before its all said and done...

THINGS TO LOOK OUT FOR : Temps,roads, and evaporative cooling...

Is that coming from the NWS? I know you have connections.