Flash Flood Warning 9, NWS Chicago, IL

ILZ003>006-008-010>014-019>023-032>033-039-INZ001>002-010>011-019-
261600-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
600 AM CDT/EST FRI JUN 26 1998

FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST INDIANA

THERE IS A SLIGHT RISK OF ISOLATED SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING OVER THE AREA.

HEAT WILL ONCE AGAIN BE THE PRIMARY WEATHER CONCERN. HIGH TEMPERATURES
AND HUMIDITY WILL COMBINE TO MAKE IT FEEL MUCH HOTTER THAN IT IS. HEAT
INDEX VALES WILL RANGE FROM 100 TO 105. SUCH HEAT CAN BE LIFE
THREATENING...ESPECIALLY IN DENSELY POPULATED URBAN AREAS. PEOPLE MOST
AT RISK ARE THE ELDERLY AND THOSE WITH CHRONIC HEALTH PROBLEMS. THE
BEST WAY TO SURVIVE THE HEAT IS TO SPEND AS MUCH TIME AS POSSIBLE IN
AIR CONDITIONING...DRINK PLENTY OF NON-ALCOHOLIC FLUIDS AND CURTAIL
STRENUOUS OUTDOOR ACTIVITIES.

WHILE A WARM MOIST AIRMASS REMAINS IN PLACE AT THE SURFACE OVER THE
AREA...OTHER MECHANISMS NEEDED FOR THUNDERSTORMS DEVELOPMENT ARE
HARDER TO FIND. A WARM ATMOSPHERE ALOFT WILL ACTUALLY RETARD
DEVELOPMENT. THE MOST LIKELY AID TO DEVELOPMENT WILL BE THE OUTFLOW
BOUNDARIES FROM THIS MORNINGS THUNDERSTORMS. ISOLATED THUNDERSTORMS
COULD DEVELOP ON THESE BOUNDARIES. SOME OF THE THUNDERSTORMS COULD
PRODUCE STRONG WINDS AND HEAVY RAINFALL.

SOMREK

ILZ003>006-008-010>014-019>023-032>033-039-INZ001>002-010>011-019-
271100-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO IL
1100 AM CDT/EST FRI JUN 26 1998

FOR NORTH CENTRAL AND NORTHEAST ILLINOIS AND NORTHWEST INDIANA

THERE IS A SLIGHT RISK OF ISOLATED SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING OVER THE AREA.

SCATTERED THUNDERSTORMS MAY DEVELOP AGAIN THIS AFTERNOON AND CONTINUE
INTO EARLY THIS EVENING.  ALTHOUGH THE MAIN PROBLEM WITH THESE STORMS
IS EXPECTED TO BE HEAVY RAINFALL...THERE COULD BE ISOLATED OCCURRENCES
OF BRIEF GUSTY WINDS AND HAIL ASSOCIATED WITH STRONGER STORMS.

MERZLOCK