Blizzard Ripping Across The Midwest

Water Vapor Image of Midwestern Blizzard Tuesday 11:35pm EST

Upper Level Map Shows Strong Jet Stream Over Arkansas & Louisiana...Click For Larger Image

Surface Map Tuesday Evening...Click For Larger Image

Arctic air moving south across the Dakotas with temperatures of 20 to 30 below zero, combined with jet stream winds topping 180 mph pulling warm, moist air north from Arkansas and gulf coast area, are colliding over the Midwest tonight.  The result is a powerful blizzard which appears to be hitting metro Chicago the hardest, so far.  As of late Tuesday evening, weather stations in the Chicago area were reporting thunder with hail and heavy snow, visibility reduced to 300 feet, wind gusts of 55-60 mph, 9 inches of new snow, and wind chills below zero.

CHICAGO AREA WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1000 PM CST TUE FEB 01 2011

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.

ILZ005-006-012>014-019>023-020500-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
OHARE          HVY SNOW  19  19 100 NE36G53   29.73R VSB 1/4 WCI  -1
MIDWAY         HAIL      21  18  88 NE30G56   29.69S VSB 1/16
AURORA         FOG       21  19  92 NE33G45   29.73R VSB 1/4
LANSING*       SNOW      21  19  93 NE22G37   29.65R VSB 1/2
JOLIET*          N/A     21  18  86 N21G32    29.68R
WAUKEGAN       HVY SNOW  21  18  88 NE30G49   29.79F VSB 1/4
WEST CHICAGO     N/A    N/A N/A N/A MISG      29.70R
WHEELING       FOG       21  17  84 NE28G43   29.79R VSB 1/4
KANKAKEE*      CLOUDY    25  18  74 NE20G33   29.61R
MORRIS*        CLOUDY    21  21 100 NE13G22   29.71R THUNDER
LEWIS AIRPORT* SNOW      21  19  90 NE26G45   29.65R VSB 1/2
NORTHERLY IS     N/A     23  22  96 MISG        N/A
$$

WIZ051-052-058>065-066-070>072-020500-
SOUTHEAST WISCONSIN

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MILWAUKEE      HVY SNOW  20  17  88 NE35G46   29.90F VSB 1/8
KENOSHA*       HVY SNOW  20  18  92 NE38G46   29.82F VSB 1/4 WCI  -1
RACINE*        HVY SNOW  20  18  92 NE38G49   29.87F VSB 1/4 WCI  -1
BURLINGTON     SNOW      18  19 100 NE17G37   29.85F VSB 1/2
WAUKESHA       CLOUDY    17  14  88 NE28G41   29.89F WCI  -2
WEST BEND      SNOW      18  15  88 NE25G35   29.96F VSB 1/2
$$

This storm is forecast to be in western New York by midday Wednesday.  On that track the area from Chicago to Detroit to Buffalo and up to Burlington, VT will receive the heaviest snow.  Just south of the heavy snow an ice storm is expected, including much of Pennsylvania.  Areas north of Baltimore with have some icing in the pre-dawn hours before the storm pulls warmer air into the region as it passes to the north.

Tom Tasselmyer

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