17 JULY 2010 EXTENDED FORECAST

17 JULY 2010 EXTENDED FORECAST

HIGH PRESSURE WILL GIVE WAY DURING THE DAY ON SATURDAY AND INCREASE OUR SOUTHERLY FLOW. TEMPS AND HUMIDITY WILL INCREASE IN RESPONSE. A WEAK COOL FRONT WILL BE POSITIONED OVER SRN MN AND BEGIN TO PUSH SLOWLY SOUTHWARD OVERNITE - DRAGGING ISOLATED SHOWERS AND STORMS WITH IT. EXPECT SEVERE THUNDERSTORMS IN NORTHERN IOWA...........

TODAY 17TH - HOT/HUMID - PARTLY CLOUDY - THEN MOSTLY CLOUDY WITH ISOLATED SHOWERS/STORMS AFTER MIDNITE - TEMP 92 - HEAT INDEX +105F

WE WILL REMAIN UNSTABLE WITH FRONT STALLING JUST TO OUR NORTH.

SUNDAY AND MONDAY 18TH/19TH - HOT/HUMID - PARTLY TO MOSTLY CLOUDY WITH ISOLATED TSHOWERS - TEMPS NEAR 90 - HEAT INDEX NEAR 105F

RING OF FIRE SET UP. HIGH PRESSURE CURRENTLY SITUATED OVER THE SOUTHWEST UNITED STATES WILL SLIDE SLOWLY EASTERWARD OVER THE WEEKEND - FORCING ANY SYSTEM DEVELOPMENT OVER THE WEST COAST TO MOVE STRAIGHT EAST, AND STAY WELL NORTH OVER THE NORTHERN PLAINS IN THE WEEK AHEAD. IOWA WILL BE ON THE NORTHERN FRINGES OF THE HIGH PRESSURE - MAKING US A HOT, AND HIT AND MISS THUNDERSTORM TARGET THRU LATE WEEK. WE'LL SEE ISOLATED SHOWERS AND STORMS BREAKOUT DURING LATE AFTERNOON AND EVENING HOURS - AND LASTING WELL INTO THE NIGHT - WITH BEST BET FOR SEVERE STORMS ALONG THE MN/IA BORDER THRU THIS PERIOD. ANY STORM THAT DOES DEVELOP WILL BE CAPABLE OF HEAVY RAIN.

TUESDAY THRU SATURDAY 20TH THRU 24TH - HOT/HUMID - PARTLY TO MOSTLY CLOUDY WITH GUSTY SOUTHWEST WINDS - DAILY SHOTS AT SHOWERS AND STORMS - TEMPS LOW/MID 90'S - HEAT INDEX 100/105F

WEEK OF SUNDAY THE 25TH - VERY HOT AND HUMID WITH HIGH TEMPS STEADY IN MID/HIGH 90'S THRU THURSDAY - DAILY HEAT INDEX WILL RANGE FROM 100 - 110F - EXPECT THUNDERSTORMS LATE WEDNESDAY INTO THURSDAY COOLING TEMPS BACK DOWN TO THE MID/HIGH 80'S AND HEAT INDEX'S BACK BELOW 90.................