Regional Weather Summary
Issued by NWS Chicago, IL

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AWUS83 KLOT 202102
RWSLOT
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
210515-

WEATHER SUMMARY FOR NORTHERN ILLINOIS AND NORTHWEST INDIANA
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
402 PM CDT MON APR 20 2015

A TIGHT PRESSURE GRADIENT AROUND STRONG LOW PRESSURE NEAR LAKE
SUPERIOR RESULTED IN STRONG WEST WINDS ON MONDAY...WITH GUSTS OVER
40 MPH AT TIMES. MOSTLY CLOUDY SKIES AND A COOL AIR MASS ONLY
ALLOWED TEMPERATURES TO REACH THE UPPER 40S TO LOWER 50S...ABOUT
10 DEGREES BELOW THE AVERAGE HIGHS FOR THE DATE. WINDS WILL
DIMINISH SOME ON MONDAY NIGHT...WHICH WILL COMBINE WITH PARTLY
CLOUDY SKIES TO ENABLE TEMPERATURES TO DIP INTO THE MID 30S TO
AROUND 40 BY EARLY TUESDAY.

ON TUESDAY...THE STRONG LOW PRESSURE AREA WILL REMAIN JUST NORTH
OF LAKE SUPERIOR...RESULTING IN ANOTHER WINDY DAY...WITH WESTERLY
WINDS GUSTING UP TO 45 MPH. HIGHS WILL RANGE FROM THE LOWER TO MID
50S NORTH OF INTERSTATE 80 AND MID TO UPPER 50S SOUTH OF
INTERSTATE 80. SKIES WILL START OUT PARTLY CLOUDY...FOLLOWED BY
INCREASING CLOUDS AND A CHANCE FOR ISOLATED SHOWERS NORTH OF
INTERSTATE 80 IN THE LATE AFTERNOON. THERE IS THEN A CHANCE FOR
RAIN SHOWERS SOUTH OF INTERSTATE 80 TUESDAY EVENING. AN EXPANSIVE
AREA OF COOL UPPER LEVEL LOW PRESSURE WILL REMAIN ESTABLISHED OVER
THE GREAT LAKES REGION THROUGH THE REST OF THE WORK WEEK...KEEPING
UNSEASONABLY CHILLY BUT DRY CONDITIONS IN PLACE...WITH HIGHS IN
THE 50S AND OVERNIGHT LOWS IN THE 30S.

$$

RC



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