23 JULY 2010 EXTENDED FORECAST

23 JULY 2010 EXTENDED FORECAST

THUNDERSTORMS CONTINUE TO EVOLVE ACROSS CENTRAL IOWA EARLY THIS MORNING. ONE LINE REMAINS ALONG THE STALLED BOUNDARY NEAR HIGHWAY 20, AND EXTENDED SOUTH NEAR THE I-80 CORRIDOR. ANOTHER CLUSTER OF STORMS HAVE BEGUN TO DEVELOP ALONG THE NOSE OF STRONG LOW LEVEL WINDS OVER SOUTHWEST IOWA AND CONTINUE TO EXPAND TOWARD THE NORTHEAST. THESE STORMS WILL CONTINUE TO PROGRESS NORTHEAST THROUGH MID MORNING BEFORE DIMINISHING LATE MORNING - AND WILL NOT MAKE IT TO POW COUNTY. DO EXPECT SOME TSTORM RECOVERY BY THIS AFTERNOON WITH NEW STORMS DEVELOPING BY MID TO LATE AFTERNOON IN THE VICINITY OF THE SFC BOUNDARY. A FEW OF THESE STORMS COULD BECOME SEVERE. VERY HEAVY RAIN THOUGH WILL REMAIN A CONCERN WITH INCREDIBLE AMOUNTS OF MOISTURE REMAINING AVAILABLE AND STORMS BEING EXTREMELY EFFICIENT RAINFALL PRODUCERS.

EXPECT THE FRONT TO PUSH AS FAR SOUTH AS POW COUNTY THIS AFTERNOON BEFORE PUSHING/FLUCTUATING BACK NORTH TONITE. VERY STRONG LOW LEVEL SOUTHERLY FLOW WILL SET UP AHEAD OF A COLD FRONT FORECAST TO PUSH BACK SOUTH LATE TONITE.....SHOWERS AND STORMS WILL DEVELOP ALONG THE FRONT - AND MOVE SOUTHEAST PUSHING THRU POW COUNTY BY MID MORNING SATURDAY - AND CLEAR SOUTHEAST IOWA BY AFTERNOON - PARTLY CLOUDY SKIES WILL FOLLOW AND LAST INTO MONDAY UNDER HIGH PRESSURE............

TODAY 23RD - MOSTLY CLOUDY - SW WIND 10MPH - THUNDERSTORMS BY LATE AFTERNOON (BETWEEN 4-6PM) TEMP HUMID/90........EXPECT POCKETS OF HEAVY RAIN OVERNITE (1-2 INCHES)

SATURDAY 24TH - SHOWERS/STORMS ENDING BY NOON - THEN PARTLY CLOUDY - WEST WIND 10-15MPH - TEMP 86/HUMID

SUNDAY THRU THURSDAY 25TH THRU 29TH - PARTLY CLOUDY - COOLER SUNDAY (82F) THEN, HUMID WITH HIGH TEMPS STEADY IN HIGH 80'S THRU THURSDAY - DAILY HEAT INDEX OF AROUND 100F - THUNDERSTORMS TUESDAY AND LASTING INTO THURSDAY WILL COOL TEMPS BACK DOWN TO THE MID/HIGH 80'S AND HEAT INDEX'S BACK BELOW 90.................