FLUS43 KLOT 062038
HWOLOT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
338 PM CDT SAT JUN 6 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-
338 PM CDT SAT JUN 6 2015
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
THERE WILL BE AN INCREASING CHANCE FOR THUNDERSTORMS...ESPECIALLY
ALONG AND WEST OF THE I-39 CORRIDOR...INCLUDING THE ROCKFORD METRO
AREA DURG THE PRE-DAWN HOURS. THERE IS STILL SOME UNCERTAINTY AS
THE THE TIMING OF THUNDERSTORMS APPROACHING THE I-39 CORRIDOR AS
THE THUNDERSTORM ACTIVITY SHOULD BE ONGOING OVERNIGHT OVER IOWA
AND UPPER MISSOURI VALLEY. THE GREATEST INITIAL SEVERE WEATHER
THREAT WILL BE FROM STRONG...DAMAGING WINDS ASSOCIATED WITH BOWING
LINE SEGMENTS OF THUNDERSTORMS. THERE IS A SMALLER...BUT NOT
INSIGNIFICANT THREAT FOR ISOLATED SUPERCELL ACTIVITY IN THE WARM
SECTOR AHEAD OF THE BOWING LINES...IN AN ENVIRONMENT THAT WILL SEE
INCREASING LOW LEVEL MOISTURE AND POSSIBLE OUTFLOW BOUNDARIES FROM
EARLIER OR ONGOING CONVECTION. TIMING AND LOCATION OF POSSIBLE
SUPERCELL DEVELOPMENT IS HIGHLY UNCERTAIN. HOWEVER...IF SUPERCELLS
DO DEVELOP...THEY WILL HAVE THE POTENTIAL TO PRODUCE LARGE
HAIL...STRONG WINDS AND HEAVY RAINFALL. THERE COULD BE A
SMALL...BUT NON-ZERO TORNADO THREAT SHOULD ANY SUPERCELLS INTERACT
WITH OLD OUTFLOW BOUNDARIES.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
PERIODIC THUNDERSTORMS ARE POSSIBLE SUNDAY THROUGH MONDAY. SOME
STORMS COULD BE SEVERE AND PRODUCE VERY HEAVY RAINFALL ON SUNDAY
AND SUNDAY EVENING. THIS HEAVY RAINFALL COULD RESULT IN FLASH
FLOODING CONCERNS FOR PORTIONS OF THE AREA INTO SUNDAY
EVENING...ESPECIALLY IF HEAVY RAIN RATES OCCUR OVER A GIVEN AREA
FOR AN EXTENDED PERIOD.
THERE IS ALSO A CHANCE FOR THUNDERSTORMS WEDNESDAY THROUGH
FRIDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
&&
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