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January 30-February 1 Winter Storm Part 2


Hoosier
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Made it to the office safely, drive time actually wasn't too bad with less cars out but the roads were trash as you'd expect. Just before I got here, had to help push a car up a hill on the road near my office and a little bit farther along a pickup was towing a sedan out of a ditch. Was heavy snow the whole drive in. We're about to do our 06z measurement. When I left home was estimating about 4" in southeast Naperville. Glad the forecast is working out pretty well for most of the area.

Sent from my SM-G965U using Tapatalk

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12 minutes ago, StormChaser4Life said:

Mixing line finally pushed south with some decent bands pivoting over me as the 850mb low that janetjanet998 pointed out nears my area. 

 

traffic cams showing northern Knoxville Ave already snowpacked with decent snow falling while other main roads further south just wet and only a few flakes

 

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3 minutes ago, janetjanet998 said:

traffic cams showing northern Knoxville Ave already snowpacked with decent snow falling while other main roads further south just wet and only a few flakes

 

Gradient setting up very sharply near I74 like forecasted. Currently have a nice band stalled here for now. 

Screenshot_20210130-235253_RadarScope.jpg

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4 minutes ago, RCNYILWX said:

Made it to the office safely, drive time actually wasn't too bad with less cars out but the roads were trash as you'd expect. Just before I got here, had to help push a car up a hill on the road near my office and a little bit farther along a pickup was towing a sedan out of a ditch. Was heavy snow the whole drive in. We're about to do our 06z measurement. When I left home was estimating about 4" in southeast Naperville. Glad the forecast is working out pretty well for most of the area.

Sent from my SM-G965U using Tapatalk
 

Not only is he a top tier met, he's a great helpful guy too :)

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1200 AM     SNOW             ROCKFORD AIRPORT        42.20N 89.10W  
01/31/2021  M5.5 INCH        WINNEBAGO          IL   OFFICIAL NWS OBS   
  
            UPDATE TO PREVIOUS REPORT. 5.3 INCHES LAST 6   
            HOURS.   
  
1200 AM     SNOW             NWS CHICAGO-ROMEOVILLE  41.60N 88.08W  
01/31/2021  M6.6 INCH        WILL               IL   OFFICIAL NWS OBS   
  
            EVENT TOTAL AS OF MIDNIGHT. 5.5 INCHES SINCE   
            6 PM. TOTAL LIQUID: 0.60 INCH.   
  
1200 AM     SNOW             OHARE AIRPORT           41.98N 87.90W  
01/31/2021  M4.5 INCH        COOK               IL   OFFICIAL NWS OBS   
  
            UPDATES PREVIOUS MEASUREMENT. 3.9 INCH SINCE   
            6 PM. 0.36 INCH LIQUID EQUIVALENT.   

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1 hour ago, RCNYILWX said:

Glad the forecast is working out pretty well for most of the area.

Worked out fine up here in N.Cook I've been shoveling every couple hours. Drier than I was anticipating/(fearing?). Windy. No viable measurements available. Forecast details aren't as important as the well presented lead-time "heads-up" messaging which also well stated the uncertainties.

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KLOT Aviation nice writeup by Ricky

AVIATION...
For the 12Z TAFs...
608 AM CST

The concerns include:
* Ongoing snow with lake enhanced snow likely to occur mid to late
  morning through early evening, with at least temporary 3/4SM
  VSBY likely and 1/2SM VSBY possible, accompanied by 006-008 CIGs
* Gusty northeast winds continuing, with gusts up to 30 kt
  possible this afternoon

Slow moving low pressure will continue to bring waves of snow
into or through this evening at the TAF sites. RFD will be on the
northwest periphery and see mainly lighter snow. The Chicago area
terminals are in a temporary lull early this morning, however
forcing is expected to increase during the mid to late morning
with lake enhancement to the snow all the way through the early
evening. At least temporary 3/4SM VSBY appears likely during this
activity, with at least brief 1/2SM VSBY quite possible. This is
based off upstream observations over southeast Wisconsin where the
lake enhanced snow is currently located paired with favorable
forecast soundings. The 12z TAF has prevailing 1SM VSBY, but it`s
possible a period of prevailing lower VSBY occurs.

The most favored time for potential prevailing sub 1SM and
occasional 1/2SM VSBY is this afternoon. Another item of note
during this afternoon window of potential moderate snow is an
increase in northeast wind gusts up to 25-30 kt. The snow should
finally wind down by early to mid evening and largely come to an
end by 06z, except maybe a bit longer for GYY. Additional snowfall
accumulations will be up to 2-4" of fluffier snow than last
night, with 1-3" at DPA and up to 1" at RFD. IFR to lower end MVFR
CIGs early this morning should build back down to IFR in 006-008
range with lake enhancement, then improve after the snow ends this
evening. MVFR CIGs then look to prevail through at least Monday
morning.

Castro
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Latest Aviation

looks like a little bit of more detail then usual on additional amounts for an Aviation snuck in there

:)

 

AVIATION  
  
FOR THE 12Z TAFS...  
608 AM CST  
  
THE CONCERNS INCLUDE:  
* ONGOING SNOW WITH LAKE ENHANCED SNOW LIKELY TO OCCUR MID TO LATE  
  MORNING THROUGH EARLY EVENING, WITH AT LEAST TEMPORARY 3/4SM  
  VSBY LIKELY AND 1/2SM VSBY POSSIBLE, ACCOMPANIED BY 006-008 CIGS  
* GUSTY NORTHEAST WINDS CONTINUING, WITH GUSTS UP TO 30 KT  
  POSSIBLE THIS AFTERNOON  
  
SLOW MOVING LOW PRESSURE WILL CONTINUE TO BRING WAVES OF SNOW  
INTO OR THROUGH THIS EVENING AT THE TAF SITES. RFD WILL BE ON THE  
NORTHWEST PERIPHERY AND SEE MAINLY LIGHTER SNOW. THE CHICAGO AREA  
TERMINALS ARE IN A TEMPORARY LULL EARLY THIS MORNING, HOWEVER  
FORCING IS EXPECTED TO INCREASE DURING THE MID TO LATE MORNING   
WITH LAKE ENHANCEMENT TO THE SNOW ALL THE WAY THROUGH THE EARLY  
EVENING. AT LEAST TEMPORARY 3/4SM VSBY APPEARS LIKELY DURING THIS  
ACTIVITY, WITH AT LEAST BRIEF 1/2SM VSBY QUITE POSSIBLE. THIS IS  
BASED OFF UPSTREAM OBSERVATIONS OVER SOUTHEAST WISCONSIN WHERE THE  
LAKE ENHANCED SNOW IS CURRENTLY LOCATED PAIRED WITH FAVORABLE  
FORECAST SOUNDINGS. THE 12Z TAF HAS PREVAILING 1SM VSBY, BUT IT'S  
POSSIBLE A PERIOD OF PREVAILING LOWER VSBY OCCURS.   
  
THE MOST FAVORED TIME FOR POTENTIAL PREVAILING SUB 1SM AND  
OCCASIONAL 1/2SM VSBY IS THIS AFTERNOON. ANOTHER ITEM OF NOTE   
DURING THIS AFTERNOON WINDOW OF POTENTIAL MODERATE SNOW IS AN   
INCREASE IN NORTHEAST WIND GUSTS UP TO 25-30 KT. THE SNOW SHOULD   
FINALLY WIND DOWN BY EARLY TO MID EVENING AND LARGELY COME TO AN   
END BY 06Z, EXCEPT MAYBE A BIT LONGER FOR GYY. ADDITIONAL SNOWFALL  
ACCUMULATIONS WILL BE UP TO 2-4" OF FLUFFIER SNOW THAN LAST   
NIGHT, WITH 1-3" AT DPA AND UP TO 1" AT RFD. IFR TO LOWER END MVFR  
CIGS EARLY THIS MORNING SHOULD BUILD BACK DOWN TO IFR IN 006-008  
RANGE WITH LAKE ENHANCEMENT, THEN IMPROVE AFTER THE SNOW ENDS THIS  
EVENING. MVFR CIGS THEN LOOK TO PREVAIL THROUGH AT LEAST MONDAY   
MORNING.  
  
CASTRO  

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