..POTENTIAL FOR DANGEROUS HEAT THURSDAY...
.A LARGE AREA OF EXCESSIVE HEAT OVER THE PLAINS WILL SPREAD INTO THE REGION TONIGHT AND THURSDAY. HOT TEMPERATURES...COMBINED WITH INCREASING HUMIDITY WILL LEAD TO DANGEROUS HEAT INDEX VALUES
THURSDAY THROUGH THURSDAY NIGHT.
INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...DUBUQUE...
VINTON...CEDAR RAPIDS... ANAMOSA... MAQUOKETA ...MARENGO...IOWA CITY...TIPTON... CLINTON... MUSCATINE...BETTENDORF...DAVENPORT... SIGOURNEY... WASHINGTON... WAPELLO...FAIRFIELD...MOUNT PLEASANT... BURLINGTON...KEOSAUQUA....FORT MADISON ...GALENA...FREEPORT...MOUNT CARROLL...STERLING... ROCK FALLS...MOLINE...ROCK ISLAND...KEWANEE... PRINCETON...HENNEPIN...ALEDO...
OQUAWKA... MONMOUTH... CARTHAGE... MACOMB... MEMPHIS...KAHOKA
341 AM CDT WED JUN 27 2012
...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY MORNING...
* TIMING...VERY HIGH HEAT AND HUMIDITY WILL DEVELOP THURSDAY MORNING AND CONTINUE THROUGH MUCH OF THURSDAY NIGHT. CONDITIONS WILL BE MOST UNCOMFORTABLE...AND POTENTIALLY DANGEROUS FROM THE
MID AFTERNOON TO EARLY EVENING HOURS.
* HEAT INDEX/TEMPERATURE...HIGH TEMPERATURES THURSDAY WILL RANGE
FROM THE MID 90S TO JUST OVER 100. THESE VERY WARM
TEMPERATURES...WHEN COMBINED WITH HIGH HUMIDITY...WILL RESULT
IN LATE MORNING AND AFTERNOON HEAT INDEX READINGS AS HIGH AS 105
TO 110. VERY WARM AND MUGGY CONDITIONS WILL LINGER THROUGH
THURSDAY NIGHT...WITH TEMPERATURES POSSIBLY STAYING ABOVE THE
MID TO UPPER 70S THROUGH THE NIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN EXCESSIVE HEAT WATCH MEANS THAT A PROLONGED PERIOD OF HOT
TEMPERATURES AND HIGH HUMIDITY IS POSSIBLE. THIS COMBINATION
COULD CREATE A DANGEROUS SITUATION IN WHICH HEAT ILLNESSES ARE
LIKELY. MONITOR LATER FORECASTS FOR UPDATED INFORMATION.