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Feb 10th-11th Potent front/system


Brian D
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18 minutes ago, featherwx said:

Woohoo! I was just about to ask my roomies what it looked like at our apartment (Wicker Park). WWA would seem like a good idea at this point even if solely based on impact—I just drove to UIC from the Loop and it was a little dicey.

Yeah even I94 getting coated, would estimate about an inch on my car in the last hour I had it parked downtown

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KLOT

Convergence is maximized on the western shores of southern Lake
Michigan. The flow will turn solidly onshore into northeast IL
which should allow the dominant band to shift northward. We should
also maintain broader lake effect clouds/snow through the
afternoon as the convergence will likely become a bit weaker.
Rates will be high enough to coat roadways. Flurries should extend
well inland across DuPage, Cook, and Lake IL counties.

Snow across Iowa is still progged to move through the area this
evening. Mid level frontal strengthening (700 mb) combined with
modest lapse rates above it in the DGZ should support another
period of moderate snow.
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1 minute ago, McHenrySnow said:

Away from the lake clouds it has warmed up big time. 18º already, 5º above forecast high. Mid-February sun means business. Excited for tonight. Yes, I'm excited for what will hopefully be at least an inch of fluff tonight. 

returns in IA look nice, should be solid for northern tier

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7 minutes ago, McHenrySnow said:

I hope this one is ours, after missing out on the others. I've been jealous of all the fluff further south piling up this week! 

Thinking MSN to MKE is in a good spot for a few fluffy inches. Should be a decent refresher down here, hoping for a boost from the lake. Would like to see the lake band move overhead and beef up as returns move in this afternoon/evening.

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55 minutes ago, janetjanet998 said:

I wonder if LOT will pull the  trigger for an advisory for Cook/lake IL for a combo of lake and system snow?

 

 

 BUT AREAS NORTH OF I-88 COULD SEE   
1-2" DEPENDING ON THE DURATION OF THE BETTER FORCING AND HIGHER   
SNOW RATIO SNOW PRODUCTION. THE ONE UNCERTAINTY WILL BE ANY   
ADDITIONAL LAKE ENHANCEMENT IN LAKE IL AND COOK IL COUNTIES WHERE   
ADDITIONAL LAKE/LAND WIND CONVERGENCE MAY REINVIGORATE NEARSHORE   
TOTALS TOWARD THAT HIGHER PORTION OF THE RANGE. 

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39 minutes ago, Baum said:

 BUT AREAS NORTH OF I-88 COULD SEE   
1-2" DEPENDING ON THE DURATION OF THE BETTER FORCING AND HIGHER   
SNOW RATIO SNOW PRODUCTION. THE ONE UNCERTAINTY WILL BE ANY   
ADDITIONAL LAKE ENHANCEMENT IN LAKE IL AND COOK IL COUNTIES WHERE   
ADDITIONAL LAKE/LAND WIND CONVERGENCE MAY REINVIGORATE NEARSHORE   
TOTALS TOWARD THAT HIGHER PORTION OF THE RANGE. 

Sounds reasonable. Lake band is looking a bit more impressive. Imagine the Winnetka/Wilmette area has picked up an inch or two.

Flurries have commenced here.

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39 minutes ago, Baum said:

Harder here than anything I saw monday evening. February sun angle no issue.

Likely doing well there due to ORD being to your NE. Constant aircraft effect snow. 

Don’t think we are seeding this down here yet. Aircraft soundings out of MDW show a deep layer of very dry air above the LES. But, you can see how things perked up on MKX radar once that got some help from above. Best guess on that for IL counties is late eve. 

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NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE, IL   438 PM CST THU FEB 11 2021       UPDATE     436 PM CST     RECENTLY SENT OUT A TARGETED WINTER WEATHER ADVISORY FOR DUPAGE,   CENTRAL AND NORTHERN COOK, AND LAKE (IL) COUNTIES. PERSISTENT   DOMINANT LAKE EFFECT BAND CONTINUES TO CHURN, AND WITH THE GRAND   RAPIDS RADAR SAMPLING RETURNS TO NEAR 6 KFT ALIGNED FROM NEAR   LUDINGTON INTO THE NORTHEAST ILLINOIS SHORE SHOULD ALLOW BURSTS   OF MODERATE TO AT TIMES HEAVY SNOW TO CONTINUE, AT LEAST FOR A FEW   MORE HOURS BEFORE THINGS SHIFT NORTHWESTWARD WITH TIME. A RECENT   SNOW REPORT FROM THE EVANSTON AREA INDICATING RATES WERE POSSIBLY   APPROACHING AN INCH PER HOUR ALIGNS WELL WITH RADAR RETURNS AND   LIKELY FAIRLY HIGH RATIO SNOW. EXPECTING TRAVEL IMPACTS WITH THIS   ACTIVITY SETTING UP SHOP THROUGH THE EVENING RUSH (PLUS A LITTLE   WIND: SEEING SOME OCCASIONAL 20-25 MPH GUSTS). WE'LL THEN TURN OUR   ATTENTION TO THE EVENING AND OVERNIGHT WAVE WHICH SHOULD SPREAD   ADDITIONAL SNOW ACROSS THE AREA (MAINLY NORTH OF I-80) THIS   EVENING.     CARLAW  

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