Texas winter wx thread (2009-2010)

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Ntxw
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Re: Texas winter wx thread (2009-2010)

#6581 Postby Ntxw » Thu Feb 11, 2010 1:54 pm

Image

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Re: Texas winter wx thread (2009-2010)

#6582 Postby katheria » Thu Feb 11, 2010 1:55 pm

WacoWx wrote:^^^soooooo jealous!



pics a comming :)
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Re: Texas winter wx thread (2009-2010)

#6583 Postby cwp419 » Thu Feb 11, 2010 1:55 pm

cwp419 wrote:
txagwxman wrote:
orangeblood wrote:I believe this is a much more high impact event for North Texas than usual considering how cold ground temperatures have been. The winter storms North Texas usually receive are preceded by fairly warm weather. The combination of cold ground temps and high precip rates, roads should become snow packed fairly quickly. And for the NWS to believe the roads will only stay slushy makes no sense.

Maybe...but 37F temp over 23F dewpoint right now wetbulbs to about 32-33F...with sun angle, there shouldn't be problems on the roads, maybe bridges. Going to be grassy surfaces, roofs and bridges tomorrow in Dallas. I would expect 3-4" maybe 5" in spots...I think most of the moisture will be south of Dallas...


The sun angle argument is rubbish, for the most part. Thick cloud cover and precip. will nullify any difference between the sun angle in early Jan and early Feb. As for the difference, the sun angle during the highest part of the day is only 43 degrees at 32N on Feb. 10th versus 36 1/2 degrees on January 10th. Those numbers are for when the sun is at its absolute peak during the day. The difference in solar radiation intensity at the time of maximum sun angle between the two dates is only about 15%. I've seen snow-packed roads in Central Texas in April and in North Texas in March
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#6584 Postby txagwxman » Thu Feb 11, 2010 1:58 pm

ECMWF 216 hours (8-9 days)---snow again. :froze:
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Re: Texas winter wx thread (2009-2010)

#6585 Postby HockeyTx82 » Thu Feb 11, 2010 1:59 pm

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#6586 Postby gboudx » Thu Feb 11, 2010 2:00 pm

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Re: Texas winter wx thread (2009-2010)

#6587 Postby katheria » Thu Feb 11, 2010 2:00 pm

Image

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Last edited by katheria on Thu Feb 11, 2010 2:10 pm, edited 1 time in total.
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Re: Texas winter wx thread (2009-2010)

#6588 Postby txagwxman » Thu Feb 11, 2010 2:01 pm

[quote]

The sun angle argument is rubbish, for the most part. Thick cloud cover and precip. will nullify any difference between the sun angle in early Jan and early Feb. As for the difference, the sun angle during the highest part of the day is only 43 degrees at 32N on Feb. 10th versus 36 1/2 degrees on January 10th. Those numbers are for when the sun is at its absolute peak during the day. The difference in solar radiation intensity at the time of maximum sun angle between the two dates is only about 15%. I've seen snow-packed roads in Central Texas in April and in North Texas in March


Sun angle rubbish---whatever...Sun is 10-15% stronger now vs late Dec. That is enough.
If it was 28-30F and snowing it would be a much different picture across the cement.

Most of the cement pictures I have seen show SLUSH. But I am not in Dallas so I can't see.
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Re: Texas winter wx thread (2009-2010)

#6589 Postby gboudx » Thu Feb 11, 2010 2:03 pm

txagwxman wrote:Most of the cement pictures I have seen show SLUSH. But I am not in Dallas so I can't see.


Either slush, or just wet with water. When the snow slacked up earlier, most of the slush on the roads I drove on melted.
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Re:

#6590 Postby Texas Snowman » Thu Feb 11, 2010 2:04 pm

txagwxman wrote:ECMWF 216 hours (8-9 days)---snow again. :froze:


Well, that would be in line with what your compadre Wxman57 said earlier today that winter was far from done in Texas.

In fact, cross polar flow dipping as far south as the Gulf Coast might lead to the potential for record late February cold couldn't it?

This has certainly been a memorable winter...so far...
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Re: Texas winter wx thread (2009-2010)

#6591 Postby cwp419 » Thu Feb 11, 2010 2:05 pm

txagwxman wrote:

The sun angle argument is rubbish, for the most part. Thick cloud cover and precip. will nullify any difference between the sun angle in early Jan and early Feb. As for the difference, the sun angle during the highest part of the day is only 43 degrees at 32N on Feb. 10th versus 36 1/2 degrees on January 10th. Those numbers are for when the sun is at its absolute peak during the day. The difference in solar radiation intensity at the time of maximum sun angle between the two dates is only about 15%. I've seen snow-packed roads in Central Texas in April and in North Texas in March


Sun angle rubbish---whatever...Sun is 10-15% stronger now vs late Dec. That is enough.
If it was 28-30F and snowing it would be a much different picture across the cement.

Most of the cement pictures I have seen show SLUSH. But I am not in Dallas so I can't see.


The effect of the angle of the rays striking the snow is different than the the ambient temperature.
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Re:

#6592 Postby HockeyTx82 » Thu Feb 11, 2010 2:06 pm

txagwxman wrote:ECMWF 216 hours (8-9 days)---snow again. :froze:


Is that the model that sniffed out this storm a few days back? If so do you think we have another shot as this stuff?
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Re: Texas winter wx thread (2009-2010)

#6593 Postby txagwxman » Thu Feb 11, 2010 2:07 pm

gboudx wrote:
txagwxman wrote:Most of the cement pictures I have seen show SLUSH. But I am not in Dallas so I can't see.


Either slush, or just wet with water. When the snow slacked up earlier, most of the slush on the roads I drove on melted.

Yes, just like I thought it would be. Tonight it will refreeze on the overpasses

Austin isn't going to see anything...
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#6594 Postby Ntxw » Thu Feb 11, 2010 2:10 pm

That is twice this winter we have had snow with a south\southeast wind. The one time we had a north wind, blizzard conditions.

The last band brought my total up to almost 7 on a flat surface.
Last edited by Ntxw on Thu Feb 11, 2010 2:13 pm, edited 1 time in total.
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#6595 Postby gboudx » Thu Feb 11, 2010 2:10 pm

I've never seen whiteout conditions, but looking out the window, visibility is less than 0.25 mile right now. Awesome.
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Re: Texas winter wx thread (2009-2010)

#6596 Postby brewskymc » Thu Feb 11, 2010 2:12 pm

WacoWx wrote:PLEASE POST PICS OF SAID SNOWSTORM!!! I'm dying a slow death down here in the rain. stupid weather. :(

Don't lose hope yet... Looks like the rain/snow line is getting closer to you guys. You may still get a taste before it's all over with.
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Re:

#6597 Postby Texas Snowman » Thu Feb 11, 2010 2:16 pm

gboudx wrote:I've never seen whiteout conditions, but looking out the window, visibility is less than 0.25 mile right now. Awesome.


I have in Colorado skiing a few times...pretty disorienting and I'd rather not see it on the roads here!

It's cranking here in Sherman/Denison with about 3-4" on the ground. Roads are beginning to get slush/snow-packed...
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Re: Texas winter wx thread (2009-2010)

#6598 Postby katheria » Thu Feb 11, 2010 2:17 pm

Image


more pics later
Last edited by katheria on Thu Feb 11, 2010 2:19 pm, edited 1 time in total.
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Re:

#6599 Postby Tireman4 » Thu Feb 11, 2010 2:18 pm

txagwxman wrote:ECMWF 216 hours (8-9 days)---snow again. :froze:



Houston Metro? How has the GFS and the ECMWF done on these latest snows? ( December 4, December 24-25 and now). Are they really starting to get it right?
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#6600 Postby TeamPlayersBlue » Thu Feb 11, 2010 2:22 pm

I'm just outside Tyler headed to Dallas....I 20 conditions? Haven't even seen frz mark yet
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