FLUS43 KLOT 100945
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
445 AM CDT WED JUN 10 2015
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE-
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON-
445 AM CDT WED JUN 10 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TODAY AND TONIGHT.
WEATHER HAZARDS EXPECTED:
THUNDERSTORMS...THE STRONGEST OF WHICH MAY PRODUCE:
HEAVY RAINFALL AND LOCALIZED FLOODING.
QUARTER SIZE HAIL OR LARGER.
WIND GUSTS IN EXCESS OF 60 MPH.
AREAS AFFECTED AND TIMING:
WHILE THERE WILL BE ISOLATED STORMS THIS MORNING...THESE ARE NOT
EXPECTED TO HAVE MUCH OF AN OPPORTUNITY TO BECOME SEVERE. AFTER
3 PM...THE CHANCE FOR STORMS WILL BE SOUTH OF I-88...WITH THE
HIGHEST LIKELIHOOD ALONG AND SOUTH OF A MENDOTA TO CHICAGO LINE.
STORMS ARE EXPECTED TO INCREASE IN COVERAGE THROUGH SUNSET...THEN
GRADUALLY FADE INTO THE OVERNIGHT. THE CHANCE FOR SEVERE STORMS
AND HEAVY RAINFALL IS MAINLY BETWEEN 3 PM AND MIDNIGHT.
DISCUSSION:
A FRONTAL BOUNDARY MOVING INTO AREA THIS MORNING WILL SLOW AND
BE NEAR THE U.S. HIGHWAY 34 CORRIDOR DURING PEAK HEATING. WITHIN
A WARM AND HUMID AIR MASS...THIS BOUNDARY WILL SERVE AS A FOCUS
FOR SCATTERED TO NUMEROUS STORMS. SOME OF THESE STORMS COULD
BECOME SEVERE. SLOW STORM MOTIONS WILL SUPPORT THE THREAT FOR
LOCALIZED FLOODING...ESPECIALLY FOR AREAS THAT HAVE HAD A HIGH
AMOUNT OF RAINFALL SINCE LAST WEEKEND.
HEAT INDEX READINGS MAY REACH 100 DEGREES FOR SOME ILLINOIS
LOCATIONS SOUTH OF INTERSTATE 80. THE FIRST TIME OF THE YEAR WITH
SUCH WARMTH CAN CATCH SOME OFF GUARD...SO ENSURE TO REVIEW AND
PRACTICE HEAT SAFETY AS NEEDED.
PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD
STAGE.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
PERIODIC THUNDERSTORMS ARE PROBABLE THURSDAY THROUGH MONDAY.
WHILE THERE IS UNCERTAINTY ON SPECIFICS...THE PATTERN INDICATES
HEAVY RAINFALL WILL AT LEAST BE POSSIBLE MUCH OF THE TIME...AND
GIVEN AN ACTIVE PATTERN COULD PRESENT FLOODING CONCERNS.
PORTIONS OF THE IROQUOIS AND KANKAKEE RIVERS WILL REMAIN IN FLOOD
STAGE THROUGH LATE THIS WEEK.
.SPOTTER INFORMATION STATEMENT...
SPOTTERS MAY BE NEEDED AFTER 3 PM THIS AFTERNOON.
&&
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