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Rockies/Plains Winter Storm Dec 2-4


Srain

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man, i wish there were people posting obs for the snow developing along the front range of the Rockies...hmmm, I guess there would have to posters from that area on this board...i'd love to see pics and hear what people have to say about the current conditions...

Been inside at work in Aurora since 8:15 AM, but general impressions and talking to people are that the N Metro area/Boulder got more (like 6-8)", with the foothills the big winner, while the Denver and South Metro area got 4-5. Breezy. Pretty, but the roads s%$k because they don't treat or plow them much here (why?????). Driving in was a sheet of ice this AM, no sand trucks to be found. Many cars traveling inadvertently in nonpreferred directions.:devilsmiley:

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24.8 degrees

4" of fluffy snow. (or maybe a bit more)

It stopped snowing.

The pics wouldn't look as the pics I took of snowstorms on Oct. 26 or Nov. 2.

6-7" on elevated surfaces in Highlands Ranch, but winds have been gusty at times so huge variations point to point

Been inside at work in Aurora since 8:15 AM, but general impressions and talking to people are that the N Metro area/Boulder got more (like 6-8)", with the foothills the big winner, while the Denver and South Metro area got 4-5. Breezy. Pretty, but the roads s%$k because they don't treat or plow them much here (why?????). Driving in was a sheet of ice this AM, no sand trucks to be found. Many cars traveling inadvertently in nonpreferred directions.devilsmiley.gif

hey guys! thanks for those obs!!! i love having a mental picture of what's going on!

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Well I love being wrong. For western NE this storm will take an early N track before interacting with the main northern stream. MN is still a tougher call. EC/UK still have much less northern stream interaction.

It's been dry the last 3 months up here so i expect that to continue...la nina winter??? i have better luck with an el nino.

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It's been dry the last 3 months up here so i expect that to continue...la nina winter??? i have better luck with an el nino.

The more I look at things I think we are heading towards a below normal winter up here for snowfall. I do think we are cold though, just most of the big phased storms hit to the east and we get northern stream moisture starved junk for a while.

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This looks like a pretty classic setup for a coastal low/trough to develop along the Lower/Mid TX Coastal region. I wouldn't be surprised to see an impressive moisture shield up into N TX and perhaps a little accumulation of back end snow Monday night into Tuesday morning, depending on the timing of the 5H trough.

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If someone gets a chance could they post the 12z Euro data for KLSE and KRST for the upcoming storm.

Thanks

LSE

SAT 12Z 03-DEC   0.5	-1.1	1023	  95	  97	0.03	 561	 543  
SAT 18Z 03-DEC   1.3	-1.3	1022	  98	  99	0.08	 560	 543  
SUN 00Z 04-DEC   0.1	-1.0	1019	  99	  90	0.21	 556	 541  
SUN 06Z 04-DEC  -0.3	-2.4	1016	  97	  99	0.27	 551	 539  
SUN 12Z 04-DEC  -1.5	-5.0	1015	  92	 100	0.07	 545	 533  
SUN 18Z 04-DEC   0.1	-6.9	1020	  79	  89	0.02	 544	 528

RST

SAT 18Z 03-DEC   0.7	-2.2	1022	  92	 100	0.04	 559	 541  
SUN 00Z 04-DEC  -1.0	-2.9	1019	  97	 100	0.24	 554	 539  
SUN 06Z 04-DEC  -2.4	-4.9	1017	  94	 100	0.24	 548	 535  
SUN 12Z 04-DEC  -3.2	-6.5	1017	  93	  99	0.05	 543	 530 

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Crazy gradient is expected to develop with this storm across much of Nebraska. The influence of the northern stream wave and the expected banding will result in some big differences in snowfall. Going to be a nail biter for my CWA. We eventually issued a WWA for our far SE counties.

Upstream into MN it won't be any easier. More sharp gradients, and some portions of far NW Twin Cities may see little to nothing with 3-5"+ across the far east.

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Raw data from a few select cities off of the 0z ECMWF...

DEN:

SAT 12Z 03-DEC  -5.5	-4.2	1024	  83	 100	0.02	 551	 532  
SAT 18Z 03-DEC  -5.3	-5.3	1028	  78	  99	0.13	 551	 528  
SUN 00Z 04-DEC  -7.2	-4.8	1027	  62	  76	0.02	 550	 529

LBF:

SAT 12Z 03-DEC  -2.1	-4.5	1022	  74	  82	0.01	 555	 537  
SAT 18Z 03-DEC  -2.1	-7.5	1025	  63	  97	0.07	 552	 532  
SUN 00Z 04-DEC  -2.8	-7.6	1024	  61	  74	0.05	 549	 529

OMA:

SAT 06Z 03-DEC   1.0	 2.4	1022	  85	  99	0.02	 563	 546  
SAT 12Z 03-DEC   0.9	-1.1	1022	  93	  85	0.09	 562	 545  
SAT 18Z 03-DEC   0.6	-1.4	1020	  92	 100	0.08	 560	 544  
SUN 00Z 04-DEC  -1.2	-4.0	1019	  92	 100	0.31	 554	 538  
SUN 06Z 04-DEC  -2.3	-6.4	1021	  83	  96	0.05	 550	 533

GLD:

 
SAT 12Z 03-DEC  -3.0    -5.1    1020	  81	  90    0.05	 556	 540   
SAT 18Z 03-DEC  -3.2    -7.0    1024	  81	  99    0.25	 552	 533   
SUN 00Z 04-DEC  -4.5    -6.5    1025	  73	  88    0.07	 551	 531

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Raw data from a few select cities off of the 0z ECMWF...

DEN:

SAT 12Z 03-DEC  -5.5	-4.2	1024	  83	 100	0.02	 551	 532  
SAT 18Z 03-DEC  -5.3	-5.3	1028	  78	  99	0.13	 551	 528  
SUN 00Z 04-DEC  -7.2	-4.8	1027	  62	  76	0.02	 550	 529

LBF:

SAT 12Z 03-DEC  -2.1	-4.5	1022	  74	  82	0.01	 555	 537  
SAT 18Z 03-DEC  -2.1	-7.5	1025	  63	  97	0.07	 552	 532  
SUN 00Z 04-DEC  -2.8	-7.6	1024	  61	  74	0.05	 549	 529

OMA:

SAT 06Z 03-DEC   1.0	 2.4	1022	  85	  99	0.02	 563	 546  
SAT 12Z 03-DEC   0.9	-1.1	1022	  93	  85	0.09	 562	 545  
SAT 18Z 03-DEC   0.6	-1.4	1020	  92	 100	0.08	 560	 544  
SUN 00Z 04-DEC  -1.2	-4.0	1019	  92	 100	0.31	 554	 538  
SUN 06Z 04-DEC  -2.3	-6.4	1021	  83	  96	0.05	 550	 533

GLD:

SAT 12Z 03-DEC  -3.0	-5.1	1020	  81	  90	0.05	 556	 540  
SAT 18Z 03-DEC  -3.2	-7.0	1024	  81	  99	0.25	 552	 533  
SUN 00Z 04-DEC  -4.5	-6.5	1025	  73	  88	0.07	 551	 531

Thanks. That is actually more than I was thinking it would be.

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Snow is falling this morning across New Mexico and freezing rain across the Texas Panhandle has prompted Winter Weather Advisories. Areas N and W of Amarillo should change over to light snow as the morning progresses. It appears a bit of an ice storm is in progress across Western Kansas, W of Dodge City. I see Winter Storm Warnings are up for 4-8 inches of snow from Lamar to McCook this morning.

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PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE HASTINGS NE

824 AM CST SAT DEC 03 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0823 AM SNOW CAMBRIDGE 40.28N 100.17W

12/03/2011 M7.0 INCH FURNAS NE CO-OP OBSERVER

0803 AM SNOW ORD 41.60N 98.93W

12/03/2011 M2.0 INCH VALLEY NE CO-OP OBSERVER

0735 AM SNOW 6 SSE LEXINGTON 40.70N 99.70W

12/03/2011 M4.5 INCH GOSPER NE CO-OP OBSERVER

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477

ACUS11 KWNS 031637

SWOMCD

SPC MCD 031637

IAZ000-MNZ000-NEZ000-SDZ000-032130-

MESOSCALE DISCUSSION 2368

NWS STORM PREDICTION CENTER NORMAN OK

1037 AM CST SAT DEC 03 2011

AREAS AFFECTED...ERN NEB...NWRN IA AND S-CNTRL MN

CONCERNING...HEAVY SNOW

VALID 031637Z - 032130Z

BANDS OF SNOW WITH POTENTIAL FOR LOCALIZED RATES FROM 0.5 TO 1 INCH

PER HOUR INITIALLY ACROSS ERN NEB WILL EXPAND NEWD INTO NWRN IA AND

S-CNTRL MN DURING THE AFTERNOON.

LATE THIS MORNING A DEEP QUASI-STATIONARY BAROCLINIC ZONE EXTENDS

FROM CNTRL KS THROUGH NWRN IA INTO SRN MN AND CNTRL WI. A SHORTWAVE

TROUGH WAS INDICATED ON WV IMAGERY OVER CNTRL KS. AS THIS FEATURE

EJECTS NEWD...A SURFACE WAVE AND ZONE OF STRONGER LOW-MID LEVEL

FRONTOGENETIC FORCING WILL DEVELOP NEWD THROUGH NWRN IA AND

EVENTUALLY SRN MN THIS AFTERNOON. THIS MIGRATORY ZONE OF STRONGER

FORCING FOR ASCENT WILL PROMOTE BANDS OF SNOW DEVELOPING NEWD. A

POTENTIAL LIMITING FACTOR FOR A MORE ROBUST AND SUSTAINED HEAVY SNOW

EVENT IS TENDENCY FOR EJECTING SHORTWAVE TROUGH TO DEAMPLIFY WITH

TIME WHICH MAY TEMPER DEGREE OF FORCING NECESSARY TO MAINTAIN

ORGANIZED HEAVY SNOW BANDS AS ACTIVITY DEVELOPS NEWD.

NEVERTHELESS...AREAS FROM ERN NEB INTO NWRN IA AND EVENTUALLY SRN MN

MAY EXPERIENCE PERIODS OF SNOWFALL WITH RATES LOCALLY FROM 0.5 TO 1

INCH PER HOUR INTO THE AFTERNOON.

..DIAL.. 12/03/2011

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT

ATTN...WFO...MPX...DMX...FSD...OAX...GID...

LAT...LON 43299334 40989660 40419806 41349815 44169391 43299334

CLICK HERE TO GO TO PREVIOUS BULLETINS.

post-999-0-76148600-1322931364.gif

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Highest total thus far...

1051 AM HEAVY SNOW HERNDON 39.91N 100.79W

12/03/2011 E12.0 INCH RAWLINS KS TRAINED SPOTTER

Heavy snow in the Omaha area currently...

KOMA 031833Z 34009KT 1/4SM R14R/4000VP6000FT +SN FZFG SCT004 OVC008 M00/M02 A2998

KFET 031835Z AUTO 35005KT 1/4SM +SN OVC003 00/M01 A2999 RMK AO2 P0001

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