HIGH PRESSURE WILL DOMINATE IOWA THRU FRIDAY MORNING - BEFORE A COLD FRONT MOVES SOUTH OUT OF THE DAKOTAS AND MINN FORCING STORMS SOUTHWARD IN IT'S PATH - TAKING THE HOT AND HUMID CONDITIONS WITH IT...............
HEAT INDEX WILL BE ABOVE 100F WED AND THURSDAY. A COLD IS POISED TO PUSH INTO NW IOWA LATE THURSDAY. WITH VERY UNSTABLE AIR AHEAD OF THE FRONT, EXPECT TSTORMS TO BREAK OUT IN POW COUNTY BY MID AFTERNOON FRIDAY. LOOK FOR COLD FRONTAL PASSAGE JUST PRIOR TO SUNSET FRIDAY EVENING. A FINE LINE OF SEVERE WEATHER WILL BREAKOUT JUST AHEAD AND ALONG THE BOUNDARY AND LAST THRU THE EVENING HOURS.
TSHOWERS WILL PERSIST OVERNITE FRIDAY AND INTO MID-MORNING - THEN CLEARING FOR SATURDAY AFTERNOON...
SUNDAY AND MONDAY LOOK GOOD - NEXT SIGNIFICANT WEATHER MAKER LOOKS TO BE A QUICK SHOT AT TSTORMS TUESDAY WHEN THE UPPER LEVEL SYSTEM MOVES WEST TO EAST ACROSS IOWA.............
11 AUGUST 2010 EXTENDED FORECAST
TODAY/THURSDAY 11TH/12TH - PARTLY CLOUDY - HUMID/TEMPS NEAR 90 - HEAT INDEX ABOVE 100F
FRIDAY 13TH - MOSTLY CLOUDY WITH TSTORMS BY MID-AFTERNOON AND LASTING INTO OVERNITE (POSSIBLY SEVERE STORMS BY 6PM) - TEMP 88
SATURDAY 14TH - TSHOWERS ENDING EARLY MORNING - THEN PARTLY CLOUDY - TEMP MID 80'S - NW WIND 10-20MPH
SUNDAY 15TH - PARTLY CLOUDY - TEMP LOW 80'S
MONDAY/TUESDAY 16TH/17THTH - PARTLY CLOUDY - THEN MOSTLY CLOUDY WITH TSHOWERS TUESDAY - TEMPS NEAR 80
WEDNESDAY THRU FRIDAY 18TH THRU 20TH - PARTLY CLOUDY - TEMPS MID/HIGH 80'S
AFTER THE 20TH?
UNSETTELED WEATHER FOR 5 TO 6 DAYS............
PARTLY TO MOSTLY CLOUDY - TEMPS NEAR AVERAGE - ABOVE AVERAGE RAINFALL.
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