* WHAT. Peak afternoon heat indices between 95 to 100 degrees. * WHERE. Portions of north central, northwest and west central Illinois, east central, northeast and southeast Iowa and northeast Missouri. * WHEN. Until 8 PM CDT Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. Overnight temperatures in the 70s will provide little relief for those without air conditioning.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 429 IN EFFECT UNTIL MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 8 COUNTIES IN NORTH CENTRAL IOWA FLOYD MITCHELL IN NORTHEAST IOWA ALLAMAKEE CHICKASAW CLAYTON FAYETTE HOWARD WINNESHIEK IN MINNESOTA THIS WATCH INCLUDES 7 COUNTIES IN SOUTHEAST MINNESOTA DODGE FILLMORE HOUSTON MOWER OLMSTED WABASHA WINONA IN WISCONSIN THIS WATCH INCLUDES 9 COUNTIES IN SOUTHWEST WISCONSIN CRAWFORD GRANT RICHLAND VERNON IN WEST CENTRAL WISCONSIN BUFFALO JACKSON LA CROSSE MONROE TREMPEALEAU THIS INCLUDES THE CITIES OF ALMA, ARCADIA, AUSTIN, BLACK RIVER FALLS, CALEDONIA, CHARLES CITY, CRESCO, DECORAH, DODGE CENTER, ELKADER, LA CROSSE, NEW HAMPTON, OELWEIN, OSAGE, PLATTEVILLE, PRAIRIE DU CHIEN, PRESTON, RICHLAND CENTER, ROCHESTER, SPARTA, TOMAH, VIROQUA, WABASHA, WAUKON, WHITEHALL, AND WINONA.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 429 IN EFFECT UNTIL MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 13 COUNTIES IN NORTH CENTRAL IOWA BUTLER CERRO GORDO FRANKLIN HANCOCK HUMBOLDT KOSSUTH WINNEBAGO WORTH WRIGHT IN NORTHEAST IOWA BREMER IN NORTHWEST IOWA EMMET PALO ALTO POCAHONTAS THIS INCLUDES THE CITIES OF ALGONA, ALLISON, APLINGTON, BELMOND, BRITT, CLARION, CLARKSVILLE, CLEAR LAKE, DUMONT, EAGLE GROVE, EMMETSBURG, ESTHERVILLE, FONDA, FOREST CITY, GARNER, GILMORE CITY, GREENE, HAMPTON, HUMBOLDT, KANAWHA, LAKE MILLS, LAURENS, MANLY, MASON CITY, NORTHWOOD, PARKERSBURG, POCAHONTAS, ROLFE, SHELL ROCK, AND WAVERLY. * PRIMARY THREATS INCLUDE. SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE. SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE. A TORNADO OR TWO POSSIBLE. PROBABILITY TABLE: PROB OF 2 OR MORE TORNADOES : 20% PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : 05% PROB OF 10 OR MORE SEVERE WIND EVENTS : 50% PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : 20% PROB OF 10 OR MORE SEVERE HAIL EVENTS : 50% PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 30% PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 80% MEAN STORM MOTION /MPH/ : E 30