Texas winter weather thread #2 - winter weather on Friday?

ROCK · #381 Postby **ROCK** » Sun Dec 03, 2006 10:26 pm

Still have a fair amount of wind here in Pearland. 51F currently. Better start dropping soon if we are to see mid-low 30's......

cheezyWXguy · #382 Postby **cheezyWXguy** » Sun Dec 03, 2006 10:28 pm

its already below freezing here north of dallas...supposed to get down to 22 tomight, but warm up tomorrow night to the upper 20's and then the 30's eventually

#383 Postby **gatorcane** » Sun Dec 03, 2006 10:36 pm

a weather channel graphic shows above normal temps for Dec - Jan for much of the midwest through the central part of the US and west.

http://www.weather.com/maps/maptype/ten ... =undefined

I see NO evidence of this right now.

cheezyWXguy · #384 Postby **cheezyWXguy** » Sun Dec 03, 2006 10:43 pm

gatorcane wrote:a weather channel graphic shows above normal temps for Dec - Jan for much of the midwest through the central part of the US and west.

http://www.weather.com/maps/maptype/ten ... =undefined

I see NO evidence of this right now.

sure...not right now...but that outlook is for the next 2 months...not for the week...its quite poosible it could warm up a lot over the central protions of the U.S...however i dont think itll get that warm

Extremeweatherguy · #385 Postby **Extremeweatherguy** » Mon Dec 04, 2006 7:15 am

IAH is right on the edge of breaking a record this morning. Currently they are at 32F, and they need to break 31F to make it. It will be a close one for sure, but at this point a tie at least looks likely.

The 6am temperatures at other locations are...

Tomball = 31F
Conroe = 31F
Huntsville = 27F
College Station = 27F
Hobby = 35F

And though these numbers are cold, they are not nearly as cold as we had the potential to be. If winds would have died down more (they stayed up around 5mph last night), then we could have been up to 2-5 degrees colder.

BTW: This is the 3rd official freeze at IAH so far this season.

Extremeweatherguy · #386 Postby **Extremeweatherguy** » Mon Dec 04, 2006 8:02 am

At 7am I am sitting at 29.5F.

Yankeegirl · #387 Postby **Yankeegirl** » Mon Dec 04, 2006 8:29 am

I am at 32.2... Cold!!

#388 Postby **CaptinCrunch** » Mon Dec 04, 2006 9:38 am

Still setting at 25 degrees @ 8:37am

#389 Postby **Portastorm** » Mon Dec 04, 2006 9:43 am

Extremeweatherguy wrote:At 7am I am sitting at 29.5F.

Ha, ha, EWG ... I beat ya ... I bottomed out at 28 degrees this morning around 6:45 am! :cheesy:

cctxhurricanewatcher · #390 Postby **cctxhurricanewatcher** » Mon Dec 04, 2006 10:42 am

It was at 35 at 6:30 am in Corpus. When I hit the sack at 11PM last night we were at 50 and windy. Nice little temp drop.

#391 Postby **jasons2k** » Mon Dec 04, 2006 11:55 am

I am nervous about tonight. I've been lucky so far this winter only getting to 31F - I am praying that somehow that High gets far enough east to swing our winds around but it doesn't look promising - and with dewpoints in the low 20's now - all I can say is :eek:

Yankeegirl · #392 Postby **Yankeegirl** » Mon Dec 04, 2006 2:23 pm

Isnt it supposed to go farther east? Thats what I thought, but maybe not tonight, I think tonight is the last of the freezing weather overnights...when i got up this morning it was 32 out... It was quite chilly... but I like it, makes it feel more like Christmas time...

#393 Postby **jasons2k** » Mon Dec 04, 2006 2:40 pm

It is supposed to shift east but not by much. Overnight the axis is still pretty much at our longitude or slightly east, depending on which map you look at.

I'm afraid it won't matter much. Without a pressure gradient to speak of, at sunset winds will go calm and with low dewpoints, I expect tonight to easily be the coldest night so far this season.

PTrackerLA · #394 Postby **PTrackerLA** » Mon Dec 04, 2006 2:52 pm

Still sitting at 44 degrees at 1:50pm, doesn't look to rise above 45 today. If the winds die down tonight mid 20's are a good bet for my area.

southerngale · #395 Postby **southerngale** » Mon Dec 04, 2006 3:08 pm

They just issued a freeze warning for here. Our low is supposed to be 25° or 26° tonight.

Freeze Warning

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAKE CHARLES LA
150 PM CST MON DEC 4 2006

...A HARD FREEZE IS EXPECTED TONIGHT NIGHT INTO EARLY TUESDAY
MORNING ACROSS INTERIOR SOUTHEAST TEXAS AND CENTRAL LOUISIANA...

.A HIGH PRESSURE CENTER OVER NORTHERN LOUISIANA TONIGHT WILL
PRODUCE CLEAR SKIES...CALM WINDS AND COLD TEMPERATURES.

LAZ041>045-051>055-TXZ215-216-051400-
/O.EXB.KLCH.FZ.W.0004.061205T0600Z-061205T1400Z/
CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-UPPER ST. MARTIN-
CAMERON-VERMILION-IBERIA-ST. MARY-LOWER ST. MARTIN-JEFFERSON-
ORANGE-
INCLUDING THE CITIES OF...LAKE CHARLES...JENNINGS...CROWLEY...
LAFAYETTE...ST. MARTINVILLE...CAMERON...ABBEVILLE...NEW IBERIA...
MORGAN CITY...BEAUMONT/PORT ARTHUR...ORANGE
150 PM CST MON DEC 4 2006

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CST
TUESDAY...

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A HARD FREEZE
WARNING FOR AREAS OF SOUTHEAST TEXAS AND SOUTHERN LOUISIANA NORTH
OF I-10...AND A FIRST FREEZE WARNING FOR AREAS SOUTH OF I-10 TO
THE COAST.

CLEAR SKIES...LOW HUMIDITIES...AND CALM WINDS WILL BE IN PLACE...
RESULTING IN ACCELERATED RADIATIONAL COOLING. TEMPERATURES ARE
EXPECTED TO FALL BELOW FREEZING AROUND MIDNIGHT...LEVELING OFF IN
THE MID TO UPPER 20S JUST BEFORE DAWN ON TUESDAY FOR AREAS NORTH
OF I-10...WHICH WILL RESULT IN 8 TO 10 HOURS OF SUB-FREEZING
TEMPERATURES. AREAS SOUTH OF I-10 TO THE COAST...TEMPERATURES ARE
EXPECTED TO FALL BELOW FREEZING AFTER MIDNIGHT... LEVELING OFF IN
THE UPPER 20S TO NEAR 32 ALONG THE COAST JUST BEFORE DAWN.

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

BE ESPECIALLY CAUTIOUS WHEN USING INDOOR SPACE HEATERS...AS MANY
HOME FIRES ARE ATTRIBUTED TO FAULTY HEATERS...OR HEATERS PLACED
TOO CLOSE TO FURNITURE OR CURTAINS.

Extremeweatherguy · #396 Postby **Extremeweatherguy** » Mon Dec 04, 2006 3:41 pm

jschlitz wrote:I am nervous about tonight. I've been lucky so far this winter only getting to 31F - I am praying that somehow that High gets far enough east to swing our winds around but it doesn't look promising - and with dewpoints in the low 20's now - all I can say is

yeah, I am worried too. The high is still sitting right over us this afternoon and we have dewpoints in the TEENS! If that high doesn't move, then with good radaitional cooling..the coldest night of the season seems very likely (may be even a hard freeze).

We will have to see what the NWS says in their afternoon AFD.

Afternoon High pressure location:

CajunMama · #397 Postby **CajunMama** » Mon Dec 04, 2006 3:58 pm

ewg & jschlitz...how does the dewpoint factor into the low temps? According to nws the dewpoint for lafayette is at 10°F.

#398 Postby **gboudx** » Mon Dec 04, 2006 4:07 pm

Here's a definition of dew point. http://en.wikipedia.org/wiki/Dew_point

Basically, the lower the dew point, the lower the air temp can drop before reaching the saturation point. And if I'm understanding the definition correctly, then at saturation the air temp cannot go lower than the dew point.

PTrackerLA · #399 Postby **PTrackerLA** » Mon Dec 04, 2006 4:16 pm

Yep, hard freeze warning in effect now, coldest temps since December 2004 on tap for tonight!

#400 Postby **jasons2k** » Mon Dec 04, 2006 4:25 pm

Yes, that's correct. The air temperature cannot go lower than the dewpoint.

Also, the dewpoint is a measure of how much moisture is in the air. Water heats and cools slower than air - so if the dewpoint is very dry - the atmosphere can heat and cool more quickly. The greater the temperature/dewpoint spread; the greater the ability for the atmosphere can heat/cool. That's why the diurnal range in deserts is much greater than in humid regions. The arid air of the desert can heat and cool more efficiently than humid, soupy air.

In today's case, the dewpoint (and also RH values, but that's another explanation) is very low - the air is very dry - so as soon as the sun sets, the temperature can fall at a faster rate. Hope this helps.

Texas winter weather thread #2 - winter weather on Friday?

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