NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
ISOLATED THUNDERSTORMS...SOME MAY PRODUCE:
WIND GUSTS UP TO 60 MPH.
BRIEF HEAVY RAINFALL.
FREQUENT LIGHTNING.
AREAS AFFECTED AND TIMING:
ISOLATED THUNDERSTORMS ARE POSSIBLE THIS MORNING ALONG AND
NORTH OF A OREGON TO HARVARD LINE. THUNDERSTORM COVERAGE
INCREASES THIS AFTERNOON AND TONIGHT ALONG MAINLY ALONG AND
NORTH OF AN OTTAWA TO DE MOTTE LINE.
DISCUSSION:
A WARM FRONTAL BOUNDARY CONTINUES TO LIFT NORTH ACROSS
NORTHERN ILLINOIS THIS MORNING. THIS BOUNDARY WILL BECOME A
FOCAL POINT FOR ISOLATED THUNDERSTORMS THIS MORNING ACROSS
EXTREME NORTHWEST ILLINOIS. THIS AFTERNOON AND TONIGHT
THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS IOWA AND
SOUTHERN MINNESOTA AND SLIDE EAST. WITH A VERY MOIST
ATMOSPHERE...SOME OF THESE THUNDERSTORMS COULD PRODUCE
BRIEF HEAVY DOWNPOURS AND LEAD TO LOCALIZED FLOODING. IN
ADDITION RENEWED CONCERNS FOR STREAMS AT OR NEAR BANKFULL
MAY BECOME FURTHER SWOLLEN IF THUNDERSTORMS ARE SLOW MOVING.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THERE IS A CHANCE THAT THUNDERSTORMS THURSDAY THROUGH FRIDAY.
THUNDERSTORMS MAY PRODUCE VERY HEAVY RAINFALL...
ESPECIALLY FOR LOCATIONS NORTH OF THE INTERSTATE 80 CORRIDOR.
HEAT AND HUMIDITY RETURNS TO NORTHERN ILLINOIS AND NORTHWEST
INDIANA THURSDAY...MAINLY SOUTH OF INTERSTATE 80 WHERE HEAT
INDICES MAY REACH 100 TO 110F.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
