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February 8-12 model discussion


Rankin5150

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00Z has the low running pretty much through middle MS, AL, GA... usually that means to warm up here in these parts, even with a weak low. I wouldnt really expect snow with a low traveling like that but the 00Z GFS gave it to us lol.

Big arctic high coming down, plenty of cold air getting drawn into the storm.

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RUT-ROW Scroooby-DOOO the 0Z run of the GFS has our system back. Like Foothills keyed in last night (including what Allan-RWx patiently told us today) is that the models are trying to key in on all these waves dropping down. I like this run so far. There will be wind with that bad boy, if it were to verify. Fun week ahead. Thank God for the weekend, so I can see all you Pro's break this down! :arrowhead::thumbsup:

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Look at this sounding for Nashville...you'd be hard pressed to ever find a colder sounding ever for them:

Date: 7.5 day AVN valid 12Z FRI 11 FEB 11
Station: KBNA
Latitude:   36.13
Longitude: -86.68
-------------------------------------------------------------------------------
LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W
    mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg
-------------------------------------------------------------------------------
SFC 1008   210 -25.4 -25.5  99  0.1 -25.5 284   7 247.2 247.2 247.2 248.4  0.48
 1 1000   265 -23.8 -23.9  99  0.1 -23.8 288  11 249.4 249.5 249.4 250.8  0.55
 2  950   641 -23.2 -24.1  93  0.8 -23.4 309  20 253.6 253.7 253.1 255.2  0.57
 3  900  1035 -24.5 -29.5  63  5.0 -25.0 317  23 256.2 256.3 254.9 257.3  0.37
 4  850  1453 -21.7 -35.1  29 13.4 -22.9 314  32 263.5 263.5 260.3 264.1  0.23
 5  800  1902 -20.2 -37.6  20 17.4 -21.9 311  42 269.6 269.6 264.7 270.2  0.19
 6  750  2379 -20.7 -40.1  16 19.5 -22.5 309  51 274.1 274.1 267.8 274.6  0.15
 7  700  2889 -21.2 -46.2   9 25.0 -23.2 307  61 279.0 279.1 270.7 279.3  0.09
 8  650  3435 -21.7 -50.7   5 29.0 -23.8 305  72 284.4 284.4 273.8 284.6  0.06
 9  600  4022 -23.4 -49.3   7 25.8 -25.4 304  80 289.0 289.0 276.3 289.2  0.07
10  550  4654 -26.5 -45.8  14 19.3 -28.0 301  84 292.7 292.7 278.2 293.1  0.12
11  500  5338 -29.9 -45.6  20 15.7 -31.0 297  89 296.6 296.6 280.0 297.1  0.13
12  450  6081 -34.3 -49.9  19 15.6 -35.2 294  92 300.1 300.2 281.5 300.5  0.09
13  400  6896 -39.6 -55.7  16 16.1 -40.2 290  93 303.6 303.6 282.9 303.8  0.05
14  350  7799 -44.4 -58.9  18 14.5 -44.8 285  96 308.9 308.9 284.9 309.0  0.04
15  300  8824 -46.6 -60.6  19 14.0 -47.0 280 109 319.7 319.7 288.7 319.9  0.04
16  250 10029 -47.8 -62.6  17 14.8 -48.2 278 117 335.0 335.0 293.1 335.2  0.03
17  200 11500 -48.5 -66.7  10 18.1 -49.1 274 114 355.9 355.9 297.9 356.0  0.02
18  150 13366 -54.4 -72.9   8 18.6 -54.7 271 122 376.4 376.4 301.6 376.5  0.01
19  100 15922 -60.3 -82.7   4 22.3 -60.6 272 101 411.2 411.2 306.6 411.2  0.00
TRP                                             0                              
WND                                             0                          

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Pretty much the textbook definition of a bomb, drops from 992 - 972 mb in 6hrs, between 156 and 162. Almost identical in slp placement at 156 compared to the 12z run, around Norfolk. Not sure I buy that continuity given the UL changes, even early on in the run. That does tell us though that small changes in the system are having little effect on the ultimate track. I would like to see a little more separation between the first vort and energy coming in on the backside, as that would likely allow the low to slip further east given it would not be as wrapped up and turn poleward as quick. :popcorn:

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I've been a lurker here for a long time. I'm in the Knoxville area (elevation 1150ft.) and I can safely say the models are looking absolutely brutal.

This is showing over a foot in my area:

http://www.twisterdata.com/data/models/gfs/3/maps/2011/02/04/00/GFS_3_2011020400_F156_SNOWIN_SURFACE.png

And with temps around 5F - 15F after it it won't melt much:

http://www.twisterdata.com/data/models/gfs/3/maps/2011/02/04/00/GFS_3_2011020400_F162_TMPF_2_M_ABOVE_GROUND.png

The 12Z and 18Z models gave us lows of -15F after the snowpack. Seeing as how we haven't really gotten well below 0 since 1996, this would be extremely rare. It's not near our record low of -24F though, but I wonder how much colder it's going to trend.

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I will never complain again if this were to verify. Needless to say, even .5 - .75" QPF would be a huge deal here. Good ratios would produce a top 10 storm here. Depicted could break the all time record. Nashville itself has not seen over 4.3" since 03.

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Look again before you get burried...it's a monster.

Huntsville and Chattanooga have gotten it great this past winter. It's Nasvhille-Knoxville-Asheville's turn :)

Speaking of which, look at the cold coming down:

http://www.twisterdata.com/data/models/gfs/3/maps/2011/02/04/00/GFS_3_2011020400_F180_TMPF_2_M_ABOVE_GROUND.png

-10F in Knoxville is pretty brutal and hasn't happened since at least 1988 (and maybe 1985)

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Now I know the GFS is crazy...it has us at 9º for a high on next Friday.

The models seem to have been trending remarkably cold in the long range all winter. We've had several model runs show below zero for KFLO in the 144+ range and I think our low for the year is 14.

Though, plumbers would sure love to see temps like that. There'd be busted pipes everywhere.

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Huntsville and Chattanooga have gotten it great this past winter. It's Nasvhille-Knoxville-Asheville's turn :)

Speaking of which, look at the cold coming down:

http://www.twisterda...BOVE_GROUND.png

-10F in Knoxville is pretty brutal and hasn't happened since at least 1988 (and maybe 1985)

Yeah we have gotten lucky these past 2 winters I will have to agree. I can't believe its been since 03' that nashville has gotten over 4.3 inches in one storm. thats a long time lol.

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