NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
WEATHER HAZARDS EXPECTED:
SCATTERED THUNDERSTORMS...THE STRONGEST STORMS MAY PRODUCE:
HEAVY DOWNPOURS.
FREQUENT LIGHTNING.
SMALL HAIL.
AREAS AFFECTED AND TIMING:
THERE IS A CHANCE OF THUNDERSTORMS SOUTH OF A LINE FROM STERLING
TO JOLIET TO DE MOTTE INDIANA TONIGHT...WITH THE BEST CHANCES
AFTER MIDNIGHT.
DISCUSSION:
AN AREA OF SHOWERS IS EXPECTED TO MOVE SOUTHEAST ACROSS THE AREA
THIS EVENING. AN ISOLATED THUNDERSTORM IS POSSIBLE WITH THESE
SHOWERS THIS EVENING.
THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER NORTHERN MISSOURI AND
SOUTHERN IOWA TONIGHT...AND MOVE EAST-SOUTHEAST ACROSS CENTRAL
ILLINOIS OVERNIGHT INTO SUNDAY MORNING. THESE THUNDERSTORMS MAY
PRODUCE HEAVY RAIN AND SMALL HAIL.
PORTIONS OF THE UPPER ILLINOIS RIVER WILL REMAIN NEAR BANK-FULL.
PERIODS OF HEAVY RAINFALL LATE TONIGHT MAY CAUSE ADDITIONAL RISES
ON AREA STREAMS AND RIVERS.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS SUNDAY THROUGH
MONDAY NIGHT. THE BEST CHANCE FOR THUNDERSTORMS WILL BE ON MONDAY
WHEN THERE IS A CHANCE FOR SEVERE THUNDERSTORMS WHICH MAY ALSO
PRODUCE HEAVY RAIN AND POSSIBLY LOCALIZED FLOODING.
PORTIONS OF THE UPPER ILLINOIS RIVER WILL REMAIN NEAR BANK-FULL
THROUGH SUNDAY EVENING. PERIODS OF HEAVY RAINFALL THROUGH MONDAY
NIGHT MAY CAUSE ADDITIONAL RISES ON AREA STREAMS AND RIVERS.
HIGH TEMPERATURES ARE EXPECTED TO REACH THE MIDDLE 90S ON FRIDAY.
COMBINED WITH DEW POINTS IN THE LOWER TO MIDDLE 70S...HEAT INDICES
AROUND 105 ARE POSSIBLE FRIDAY AFTERNOON.
THERE IS A CHANCE OF THUNDERSTORMS FRIDAY NIGHT AND SATURDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
