Texas Winter 2010-2011

Winter Weather Discussion

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srainhoutx
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Re: Texas Winter 2010-2011

#7601 Postby srainhoutx » Mon Feb 07, 2011 11:46 am

The 12Z Canadian (GEM) may raise some eyebrows...
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#7602 Postby txagwxman » Mon Feb 07, 2011 11:47 am

GFS did horrible on the timing of the front last week...
The 24 hour forecast from the 12z from the GFS run on the 31st had the front through my house by noon and it was supposed to be 38F at that time.

The front hit my house at 6:16AM and it was 39F by 6:30AM on Feb 1st.
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Re: Texas Winter 2010-2011

#7603 Postby Portastorm » Mon Feb 07, 2011 11:53 am

I'm in no position to debate/contest your statement about the GFS doing "quite well" with last week's event, wxman57. But my recollection from looking at just about every GFS model run prior to the winter weather last week was that it did not do well at all until maybe 24 hours before the event. Even then it showed 1-2 inches of snow for AUS and we didn't even technically get an inch. Also, did the GFS show the warm air at 850mb which created our freezing drizzle Thursday night? If it did, then the NWS ignored it because that was never in our forecast.

Also, the GFS did not capture the cold air temps right after the front passed earlier last week. It was about six hours too slow.
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Re:

#7604 Postby wxman57 » Mon Feb 07, 2011 11:54 am

txagwxman wrote:GFS did horrible on the timing of the front last week...
The 24 hour forecast from the 12z from the GFS run on the 31st had the front through my house by noon and it was supposed to be 38F at that time.

The front hit my house at 6:16AM and it was 39F by 6:30AM on Feb 1st.


Right, the models may have a hard time with the arrival time of the front. But it's quite difficult to get more than a few sleet pellets immediately post-frontal this far south because the airmass in place ahead of the front will not be very cold. Certainly, I wouldn't expect an ice storm across central to SE TX from this front. A few sleet pellets that melt as they reach the ground, maybe.
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#7605 Postby CaptinCrunch » Mon Feb 07, 2011 11:55 am

Do not be surprised to another 6"+ snowfall across DFW Tuesday night into Wednesday. :ggreen:


Enjoy it now, because this may be the last winter weather event we see this season across DFW, as 70's and even the 80's return by next weekend.
Last edited by CaptinCrunch on Mon Feb 07, 2011 12:00 pm, edited 1 time in total.
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Re: Texas Winter 2010-2011

#7606 Postby wxman57 » Mon Feb 07, 2011 11:59 am

Portastorm wrote:I'm in no position to debate/contest your statement about the GFS doing "quite well" with last week's event, wxman57. But my recollection from looking at just about every GFS model run prior to the winter weather last week was that it did not do well at all until maybe 24 hours before the event. Even then it showed 1-2 inches of snow for AUS and we didn't even technically get an inch. Also, did the GFS show the warm air at 850mb which created our freezing drizzle Thursday night? If it did, then the NWS ignored it because that was never in our forecast.

Also, the GFS did not capture the cold air temps right after the front passed earlier last week. It was about six hours too slow.


You're right about the GFS missing the warm layer aloft, Portastorm. But it did very well with the precip amounts and timing across the Houston area. Remember that the Euro and particularly the Canadian were forecasting up to 1/2" of precip or more here, but we ended up with around 0.1", very close to the GFS forecast. Unfortunately, that came as freezing rain. I didn't even attempt to get to work Friday.

But all we are talking about with this week's front is the possibility that some sleet may mix in with the rain as the precip ends from Austin to College Station to Lufkin. Surface temps would need to be colder for it to stick. And the logical question to follow would be as to whether the current model runs are cold enough immediately post-frontal?

Personally, I'm ready for the big thaw next week and beyond. Soon it'll be time to start talking severe weather and then tropical! :D
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#7607 Postby gboudx » Mon Feb 07, 2011 12:07 pm

Bring on the warmer weather. Jogging when it's in the 30's and having to be layered up is no fun. But I can handle one more day of snow, one more time with the boys sledding and then let it melt. My yard is a boggy mess as it is.
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Re: Texas Winter 2010-2011

#7608 Postby Portastorm » Mon Feb 07, 2011 12:09 pm

Yes, on this we can definitely agree ... bring on severe weather season and the tropics! :)
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Re: Texas Winter 2010-2011

#7609 Postby wxman22 » Mon Feb 07, 2011 12:13 pm

Just curious, what are you looking at to make that determination? I'm looking at the 6hr precip forecasts from the 00Z Euro and see the precip ending in Austin by early afternoon Wednesday and in College Station by 6pm Wednesday. It appears to have Austin above freezing when the precip ends and College Station in the 32-34 deg range when precip ends. Could be some sleet potential, but not much.


I was looking at the Euro text output

CLL: Shows .24 of precip during the transition to freezing and then .02 qpfs with temperatures below freezing. So therefore at least a little frozen precipitation would fall in College Station.
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Re: Texas Winter 2010-2011

#7610 Postby Ivanhater » Mon Feb 07, 2011 12:20 pm

wxman57 wrote:Personally, I'm ready for the big thaw next week and beyond. Soon it'll be time to start talking severe weather and then tropical! :D


Post of the month! Bring on the warmth! This winter has been very cold and I have had enough. I'm screaming Uncle!
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Re: Texas Winter 2010-2011

#7611 Postby Texas2Florida » Mon Feb 07, 2011 12:24 pm

Ivanhater wrote:
wxman57 wrote:Personally, I'm ready for the big thaw next week and beyond. Soon it'll be time to start talking severe weather and then tropical! :D


Post of the month! Bring on the warmth! This winter has been very cold and I have had enough. I'm screaming Uncle!



Wondering what this whole weather pattern means for the tropical season....La Nina into neutral by the height of it..should be moderately active..
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Re: Texas Winter 2010-2011

#7612 Postby srainhoutx » Mon Feb 07, 2011 12:31 pm

HPC:

...WAVE CROSSING THE GULF STATES DAY 3...

PRELIMINARY PREFERENCE: PENDING 12Z/07 ECMWF

THE NAM IS LESS SUPPRESSED WITH THE TRACK OF THIS SYSTEM THAN THE
00Z/07 ECMWF...WITH THE GFS SLIGHTLY MORE SUPPRESSED. THE GEM
GLOBAL IS CLOSEST TO THE ECMWF...WITH THE UKMET CLOSEST TO THE
NAM. CONSIDERING THE TRENDING OF THE GUIDANCE WITH THIS ENERGETIC
FEATURE...WILL WAIT FOR THE 12Z/07 TO MAKE A CALL HERE.

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Re: Texas Winter 2010-2011

#7613 Postby cycloneye » Mon Feb 07, 2011 12:35 pm

Texas2Florida wrote:
Ivanhater wrote:
wxman57 wrote:Personally, I'm ready for the big thaw next week and beyond. Soon it'll be time to start talking severe weather and then tropical! :D


Post of the month! Bring on the warmth! This winter has been very cold and I have had enough. I'm screaming Uncle!



Wondering what this whole weather pattern means for the tropical season....La Nina into neutral by the height of it..should be moderately active..


What about starting to think about this? :P
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Re: Texas Winter 2010-2011

#7614 Postby srainhoutx » Mon Feb 07, 2011 12:40 pm

Hmmm...still looking like a close call, but what do I know... :wink:

Image
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Re: Texas Winter 2010-2011

#7615 Postby orangeblood » Mon Feb 07, 2011 12:51 pm

srainhoutx wrote:Hmmm...still looking like a close call, but what do I know... :wink:

http://i228.photobucket.com/albums/ee29 ... p12060.gif


The 12Z GFS ensembles are much quicker with this system than past runs... with most of the heavy precip over by 12Z Wednesday morning across North Texas. Very similar to last Tuesday's winter storm but with less precip.
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#7616 Postby txagwxman » Mon Feb 07, 2011 1:05 pm

I agree with wxman57 that the precip may end quickly in Austin, but I think the front will come in faster than what these models suggest (even the new ECMWF)...so it will be close.
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Re: Texas Winter 2010-2011

#7617 Postby orangeblood » Mon Feb 07, 2011 1:25 pm

Hmm....12Z Euro and Ukmet slower with the front and a little less precip for DFW. These models are all over the place. Very tough forecast once again for the Fort Worth office!!!!! The Norman office actually has an easier forecast this time around with precip falling mostly as snow.
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Re: Texas Winter 2010-2011

#7618 Postby Tejas89 » Mon Feb 07, 2011 1:34 pm

FW office was quick to put up the WSW and I bet they'll be slow to take it down after last week. At this point, a lot of metroplexers won't hold it against them if this is a bust anyway. Bring on spring..
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Re: Texas Winter 2010-2011

#7619 Postby kmc8264 » Mon Feb 07, 2011 1:35 pm

The OKC weatherman are calling for 6-10 for southwest Ok. Is that the way you see it?
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#7620 Postby DonWrk » Mon Feb 07, 2011 1:40 pm

Just across the red river they already have Winter Storm Warnings up.


EDIT: Wow just saw the updated lows for Wednesday night. Looks like it's going to be the coldest night of the season
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