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February 4-5th Winter Storm Part 2


Chicago Storm

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MESOSCALE DISCUSSION 0065
NWS STORM PREDICTION CENTER NORMAN OK
1138 AM CST TUE FEB 04 2014

AREAS AFFECTED...ERN KS...MUCH OF MO...FAR SERN NEB AND SRN
IA...SRN/CNTRL IL

CONCERNING...HEAVY SNOW

VALID 041738Z - 042345Z

SUMMARY...HEAVY SNOW WILL PERSIST ACROSS ERN KS AND MO...AND
CONTINUE EXPANDING NWD/EWD INTO PORTIONS OF SERN NEB/SRN IA AND
CNTRL/SRN IL. RATES NEAR 1 INCH PER HR ARE EXPECTED...BUT COULD BE
LOCALLY HIGHER WITHIN MORE CONCENTRATED BANDS.

DISCUSSION...RADAR IMAGERY SHOWS WIDESPREAD LIGHT TO MODERATE SNOW
FALLING FROM CNTRL KS INTO SRN IL. HEAVIER RATES ARE LIKELY
OCCURRING WITHIN A MORE CONCENTRATED BAND FROM NEAR ICT TO OJC /AS
OF 1730Z/. ASSOCIATED CYCLONE IS LOCATED OVER OK...AND WILL CONTINUE
TO SLOWLY ACCELERATE TOWARDS THE MID-MS VALLEY THROUGH THIS EVENING.
A PRONOUNCED DRY SLOT WAS MOVING INTO SRN KS AS WELL...WHICH SHOULD
LEAD TO A DECREASE/SLIGHT NWD SHIFT OF SNOWFALL ACROSS SRN PORTIONS
OF CNTRL/ERN KS.

WITH QUASI-CLOSED NATURE OF THE SYSTEM IN THE LOW-LEVELS...AT LEAST
WEAK CONVERGENCE IN THE 700-800 MB LAYER /AS OBSERVED IN REGIONAL
VWP DATA/ SHOULD CONTINUE TO MAINTAIN BANDED STRUCTURES ON THE NRN
PERIPHERY OF THE CYCLONE /I.E. ACROSS NERN KS...NRN MO INTO FAR SERN
NEB AND SRN IA/. MEANWHILE...ADDITIONAL AREAS OF MODERATE TO LOCALLY
HEAVY SNOWFALL MAY OCCUR WITHIN THE WARM CONVEYOR REGION...PRIMARILY
ACROSS ERN MO AND SRN/CNTRL IL. THERMODYNAMIC PROFILES WILL REMAIN
FAVORABLE FOR ENHANCED SNOWFALL RATES...WITH THE PRESENCE OF A DEEP
ISOTHERMAL LAYER BENEATH THE DENDRITIC GROWTH LAYER...AS NOTED IN
MORNING SOUNDINGS.

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New to the page here. I'm from Florida so I'm used to following hurricane models. Been reading and trying to get with all the lingo here with the stuff I'm not so used to called snow haha. I'm confused as to why I have a WSW for 6-10 inch here in Dayton, but the weather channel is saying Wintery mix? Just wondering what y'all think is expected here in the Dayton area. Thanks!!

I also live in the Dayton area. The weather channel tends to be off on their snow calls around here. WeatherUnderground actually tends to be a lot more accurate with their predictions. However, with this event the models had us in a solid 6-10in area for snow, but we are likely going to experience a period of freezing rain which will cut down on our totals. The mix line is going to be a tough cookie to follow in this storm so amounts in the area will have extreme variations.

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I suspect it won't start snowing here until 11pm or even later.

 

Even STL was reporting nothing at the last obs.

 

It's the defo band that will drop snow on us up here, and won't really be moving through here until the 11 PM-7 AM window. It would be nice to see that defo band strengthen some more on the models, as we're in a great position to receive it. To those downstate and over into Indiana that are relying on the WAA push to produce their snows, the obs downstate are a bit concerning. If snow doesn't start falling in earnest over the next 1-3 hours near STL, a decent chunk of qpf could be lost to saturation. But looking at obs towards Kansas, everything looks like it's falling into place.

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Yep.

 

Don't know if it's bullocks, but Mattoon reporting mod snow at noon. 

 

And Springfield has finally started snowing. Good news.

 

 

looks legit, as long as you use base reflectivity and aren't trying to see a screw zone between radar sites, radar reflectivity seems to match up fairly well with reports.

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Can anyone shed some light on what DVN may be talking about?

 

 

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE QUAD CITIES IA IL

919 AM CST TUE FEB 4 2014

.UPDATE...

ISSUED AT 915 AM CST TUE FEB 4 2014

AT THE MOMENT THE FCST LOOKS ON TRACK. SOME INTERESTING FEATURES

IN THE 12Z UA THAT MAY AFFECT THE FCST THAT REQUIRE SOME LOOKING

IN TO AND HOW THE NEW MODEL RUNS INCORPORATE THEM.

 

My guess is it's showing up on the SREF, since DVN  has a cluster above 8".

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