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February 25-27 Winter Storm Part 2


Chicago Storm

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But but but but, it doesn't matter one bit.

 

That's the point of watches. Its acceptable and pretty common to transition to an advisory after a watch. This storm at worst is going to have an advisory level impact so the Watches are perfectly fine.. 

 

That's not what watches are designed for, the are for when you have high confidence (>50%) that warning criteria will be met, Here's what our directive has to say...

 

"WFOs will issue a winter weather watch when conditions are favorable for a hazardous winter weather event to develop over part or all of the forecast area, but the occurrence is uncertain. WFOs should issue winter weather watches with as much lead time as possible when there is a 50 percent or greater chance of a hazardous winter weather event meeting or exceeding local warning and/or impact criteria. Watches are typically issued with lead times of 36 to 48 hours..." "Care should be taken to balance the need to inform the public of impending hazardous weather with the need to avoid reducing the effectiveness of watches by issuing too many false alarms."

 

This is what is advertised to our users and documented for our forecasters, so we should try to follow that when possible. 

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ORD with 1.23" liquid..

 

TUE 18Z 26-FEB   1.0     -1.9    1005      74      84     0.04     546    541   
WED 00Z 27-FEB   0.3    -5.4    1004      96      96    0.82     540     537   
WED 06Z 27-FEB   0.5    -4.7    1003      95      95    0.21     540     537   
WED 12Z 27-FEB   0.1    -5.6    1005      93      97    0.12     540     535   
WED 18Z 27-FEB   0.5    -5.5    1008      88      96    0.04     542     536  

 

DPA with 1.17" liquid..

 

TUE 18Z 26-FEB    0.5    -1.5    1005      76      80    0.08     545     541   
WED 00Z 27-FEB   0.2    -5.5    1004      94      97    0.76     540     537   
WED 06Z 27-FEB   0.3    -4.8    1004      93      94    0.20     540     537   
WED 12Z 27-FEB  -0.4    -5.6    1006      92      97    0.10     540     535   
WED 18Z 27-FEB   0.2    -5.5    1008      86      97    0.03     542     536   

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MKE:

 

TUE 18Z 26-FEB   1.7     0.1    1009      66      47    0.00     548     541    WED 00Z 27-FEB   0.9    -6.0    1007      80      89    0.06     543     537    WED 06Z 27-FEB  -0.3    -5.3    1006      89      97    0.26     542     537    WED 12Z 27-FEB  -0.9    -5.2    1007      89      98    0.17     541     536    WED 18Z 27-FEB  -0.5    -5.4    1009      87      95    0.05     543     536
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You have QPF for Peoria please?

 

TUE 12Z 26-FEB    0.0     2.2    1002      67      92    0.02     547     545   

TUE 18Z 26-FEB   -0.3    -2.5    1001      91      96    0.54     540     539   

WED 00Z 27-FEB   0.2    -5.1    1002      93      96    0.27     538     536   

WED 06Z 27-FEB   0.5    -5.4    1005      91      86    0.06     540     537   

WED 12Z 27-FEB  -0.6    -5.7    1008      89      94    0.02     542     536   

WED 18Z 27-FEB   0.1    -6.2    1010      81      96    0.03     543     535   

THU 00Z 28-FEB    0.1    -6.9    1013      87      96    0.03     545     535   

THU 06Z 28-FEB    0.4    -5.6    1015      87      88    0.02     547     536   

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DVN

 

TUE 18Z 26-FEB    0.8    -1.6    1005      75      89    0.07     544     540   
WED 00Z 27-FEB   0.8    -6.1    1006      81      95    0.30     541     537   
WED 06Z 27-FEB  -0.8    -5.0    1007      82      95    0.08     543     537   
WED 12Z 27-FEB  -1.6    -5.3    1010      83      90    0.02     544     536  

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MKE:

 

TUE 18Z 26-FEB   1.7     0.1    1009      66      47    0.00     548     541    WED 00Z 27-FEB   0.9    -6.0    1007      80      89    0.06     543     537    WED 06Z 27-FEB  -0.3    -5.3    1006      89      97    0.26     542     537    WED 12Z 27-FEB  -0.9    -5.2    1007      89      98    0.17     541     536    WED 18Z 27-FEB  -0.5    -5.4    1009      87      95    0.05     543     536

thanks much..  Tick it north at 12z and the watch will have been justified early.

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thanks much..  Tick it north at 12z and the watch will have been justified early.

 

Watch is definitely justified now for Racine, Kenosha and Walworth Co.

 

I got about an inch on the EURO. So no real change, other than it's a tad colder.

 

UGN

TUE 18Z 26-FEB   1.2    -0.5    1007      71      47    0.00     547     541    WED 00Z 27-FEB   0.4    -5.5    1005      93      98    0.46     541     537    WED 06Z 27-FEB   0.2    -5.1    1004      93      97    0.36     541     537    WED 12Z 27-FEB  -0.3    -5.5    1006      92      95    0.15     540     535    WED 18Z 27-FEB   0.0    -5.4    1008      88      94    0.04     543     536    THU 00Z 28-FEB  -0.2    -5.3    1012      86      97    0.02     544     535    THU 06Z 28-FEB  -1.0    -6.4    1014      84      92    0.01     546     535   
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