Tactical Decision Aids
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Latest Discussion
1246 PM CDT TUE MAY 21 2013 //ORD AND MDW CONCERNS...UPDATED 18Z..

* STRONG GUSTY SOUTH TO SOUTHWEST WINDS THROUGH 00Z

* SLIGHT CHANCE TSRA THIS AFTERNOON AND EVENING

* TSRA LIKELY AFTER MIDNIGHT

PAW //DISCUSSION...UPDATED 18Z..

A FRONTAL SYSTEM APPROACHING FROM THE WEST WILL MOVE ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA TONIGHT AND WENDESDAY MORNING. THERE IS POTENTIAL FOR SHOWERS AND THUNDERSTORMS TO DEVELOP THIS AFTERNOON IN THE SOUTHWEST FLOW AHEAD OF THE SYSTEM

BUT CONFIDENCE IS LOW SO HAVE LEFT OUT OF THE TAFS FOR NOW. A BETTER CHANCE FOR THUNDERSTORMS WILL BE LATE THIS EVENING INTO THE OVERNIGHT HOURS AS THE FRONTAL SYSTEM GETS CLOSER. THEN THERE IS POTENTIAL FOR SHOWERS ON WEDNESDAY BEHIND THE FRONT

STRONG AND GUSTY SOUTHWEST WINDS WILL DIMINISH THIS EVENING...THEN BECOME LIGHT AND VARIABLE OVERNIGHT AS THE LOW PRESSURE CENTER MOVES ACROSS THE AREA. THEN WINDS BECOMING SOUTHWEST TO NORTHWEST ON WEDNESDAY BEHIND THE SYSTEM

PAW //ORD AND MDW CONFIDENCE...UPDATED 18Z..

* HIGH CONFIDENCE IN WIND TREND

* LOW CONFIDENCE IN THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING

* MEDIUM-HIGH CONFIDENCE IN THUNDERSTORMS AFTER MIDNIGHT

PAW //OUTLOOK FOR ORD/MDW FOR 00Z THURSDAY-12Z TUESDAY...UPDATED 12Z..

WEDNESDAY NIGHT...CHC SHRA. POSSIBLE MVFR

THURSDAY...CHC SHRA IN THE MORNING. VFR AFTN

FRIDAY...VFR

SATURDAY - MONDAY...SLIGHT CHANCE TSRA

ALLSOPP
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