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February 25-26 Winter Storm


wisconsinwx

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The 98 storm was a debacle from a forecasting perspective. Can't believe it's been 15 years.

Something has kinda been bugging me about this one. The models have been warming us up just above freezing in the 9z-12z Tuesday timeframe but I'm trying to figure out why. The surface low is still down in southern Missouri, the best WAA aloft occurs before that, low layer flow remains easterly and some pretty decent qpf is being produced during that period of time. None of that really points to a warmup. The only real source of warming to me would seem to be the heat release that occurs with freezing rain. It's certainly debatable what our temps will be at onset but I'm just not sure about temps actually warming during that time. Anyhow, even if temps stay around 32, this could be a case where a lot of accretion would be lost due to heavy rates.

 

I agree. Despite my negative tone...

 

I still have a gut feeling that evaporative cooling processes may lead to a quicker changeover and more snow than many are forecasting for Northern IN *cough*Tim*cough*all rain*cough.

 

...which leads me to this. I kind of agree, again. But it's such a tough call. Hate, hate, hate these kinds of set ups. Could be boom or bust. 

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Hmm, it didn't seem that good here. Temps look pretty marginal. Would someone mind posting the text output for LAF?

LAF:

TUE 12Z 26-FEB   0.1     5.5    1005      66      99    0.01     552     548    
TUE 18Z 26-FEB   1.1     0.3    1000      94      89    0.38     542     542    
WED 00Z 27-FEB   1.9    -0.4    1000      97      87    0.12     538     538    
WED 06Z 27-FEB   1.4    -0.6    1000      98      93    0.04     538     537    
WED 12Z 27-FEB   0.5    -2.1    1003      98      73    0.01     539     537    
WED 18Z 27-FEB   1.3    -3.7    1005      95      89    0.02     541     536    
THU 00Z 28-FEB   0.5    -4.6    1008      95      95    0.03     542     535    
THU 06Z 28-FEB  -0.3    -5.3    1010      93      94    0.03     544     536
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I agree. Despite my negative tone...

...which leads me to this. I kind of agree, again. But it's such a tough call. Hate, hate, hate these kinds of set ups. Could be boom or bust.

Well, my thoughts might be sorta irrelevant now that the models have slowed down the precip onset.

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LAF:

TUE 12Z 26-FEB   0.1     5.5    1005      66      99    0.01     552     548    
TUE 18Z 26-FEB   1.1     0.3    1000      94      89    0.38     542     542    
WED 00Z 27-FEB   1.9    -0.4    1000      97      87    0.12     538     538    
WED 06Z 27-FEB   1.4    -0.6    1000      98      93    0.04     538     537    
WED 12Z 27-FEB   0.5    -2.1    1003      98      73    0.01     539     537    
WED 18Z 27-FEB   1.3    -3.7    1005      95      89    0.02     541     536    
THU 00Z 28-FEB   0.5    -4.6    1008      95      95    0.03     542     535    
THU 06Z 28-FEB  -0.3    -5.3    1010      93      94    0.03     544     536

 

Damn.. ugh

 

Sorry guys. :axe:

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What about Toronto. Does it stay all snow here?

00Z FEB24

2 M 850 SFC SFC 700 6 HR 500 1000

TMP TMP PRS RHU RHU QPF HGT 500

© © (MB) (PCT) (PCT) (IN) (DM) THK

SUN 00Z 24-FEB -1.0 -10.3 1013 79 64 0.00 538 528

SUN 06Z 24-FEB -5.6 -10.5 1012 85 74 0.00 536 526

SUN 12Z 24-FEB -4.2 -11.2 1012 85 98 0.02 532 522

SUN 18Z 24-FEB 0.4 -10.9 1013 58 97 0.02 531 520

MON 00Z 25-FEB -2.4 -9.5 1017 76 72 0.02 539 526

MON 06Z 25-FEB -5.0 -8.9 1020 87 52 0.00 544 529

MON 12Z 25-FEB -5.9 -8.7 1023 87 35 0.00 549 531

MON 18Z 25-FEB 1.4 -8.5 1023 67 10 0.00 552 533

TUE 00Z 26-FEB -0.5 -7.6 1023 80 22 0.00 555 536

TUE 06Z 26-FEB -2.5 -6.1 1024 86 35 0.00 555 537

TUE 12Z 26-FEB -3.2 -5.4 1022 87 39 0.00 557 539

TUE 18Z 26-FEB 2.7 -2.5 1018 69 32 0.00 557 542

WED 00Z 27-FEB 2.1 -4.0 1015 74 78 0.00 554 542

WED 06Z 27-FEB 0.5 -1.2 1011 97 100 0.49 548 539

WED 12Z 27-FEB 0.1 -2.9 1007 96 100 0.48 543 537

WED 18Z 27-FEB 0.3 -4.8 1003 94 94 0.48 538 536

THU 00Z 28-FEB 0.2 -5.7 1003 92 96 0.17 536 534

THU 06Z 28-FEB 0.0 -6.1 1002 88 97 0.08 535 533

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For those members in the northern suburbs of Chi-town.

 

UGN:

 

TUE 18Z 26-FEB   0.9     0.3    1007      72      31    0.00     548     542    WED 00Z 27-FEB   0.4    -5.4    1006      95      97    0.52     543     538    WED 06Z 27-FEB   0.2    -5.0    1005      94      96    0.35     541     537    WED 12Z 27-FEB   0.0    -4.9    1006      92      97    0.08     541     536    WED 18Z 27-FEB   0.2    -4.6    1008      89      96    0.04     543     536    THU 00Z 28-FEB  -0.1    -4.2    1011      85      96    0.02     545     536   

 

Local Geos jackpot again, I'm calling it.  Early congrats.  Of course it couldn't happen to a more deserving person.  A snow weenie who shows a positive attitude even when nickel and dimes rear their ugly head.

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Right!  Well, not really, another QPF cut, probably for ORD as well.

 

Probably, south, yet it maintains its strength just long enough to slam the Central/Southern Plains to the Mississippi River, makes it up to the WI/IL border, then encounters some dry air and occludes as well.

 

Remind me again why you're on Americanwx at 2AM with that type of attitude toward this storm?

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DET and DTW please? :)

 

CMWF Deterministic FORECAST FOR: DTW LAT= 42.23 LON= -83.33 ELE= 663

00Z FEB24

2 M 850 SFC SFC 700 6 HR 500 1000 

TMP TMP PRS RHU RHU QPF HGT 500 

© © (MB) (PCT) (PCT) (IN) (DM) THK 

WED 00Z 27-FEB 0.6 -2.3 1006 97 98 0.38 546 541 

WED 06Z 27-FEB 0.6 -1.7 1003 97 98 0.30 541 539 

WED 12Z 27-FEB 0.6 -3.3 1001 97 97 0.11 537 537 

WED 18Z 27-FEB 1.1 -4.9 1002 90 89 0.07 538 536 

THU 00Z 28-FEB 0.7 -6.3 1004 91 96 0.05 538 535 

THU 06Z 28-FEB -0.1 -5.9 1005 90 94 0.02 539 535 

THU 12Z 28-FEB 0.0 -6.1 1009 87 93 0.01 541 534 

 

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