LIGHT SHOWERS WILL PERSIST ACROSS NORTHERN/CENTRAL IOWA (Between Grinnell and Marshalltown) THIS MORNING BEFORE DIMINISHING BEFORE NOON. SKIES WILL REMAIN MOSTLY CLOUDY UNDER THICK HIGH CLOUDS THIS MORNING...THEN CLEAR FROM THE SOUTHWEST LATE IN THE DAY. INTERMITTENT THUNDERSTORM CHANCES WILL THEN PERSIST ACROSS NORTHERN IOWA FROM FRIDAY THROUGH SATURDAY...BUT THE BIGGER STORY WILL BE THE ONSET OF A SIGNIFICANT HEAT WAVE ACROSS THE REGION. WHILE TEMPERATURES WILL REMAIN SEASONAL OR A BIT BELOW NORMAL TODAY THEY WILL BEGIN TO RISE STEADILY ON FRIDAY AND SATURDAY AND FROM SUNDAY THROUGH MUCH OF NEXT WEEK WE WILL SEE VERY HOT AND HUMID WEATHER AS THE REGION SWELTERS UNDER A LARGE HIGH PRESSURE SYSTEM. HIGH TEMPERATURES ACROSS IOWA WILL RANGE IN THE 90S FROM SUNDAY THROUGH AT LEAST WEDNESDAY...WITH HEAT INDEX VALUES IN THE AFTERNOONS AND EVENINGS LIKELY IN THE 105 TO 115 DEGREE RANGE DURING THAT TIME FRAME.
Total Rainfall Forecast:
14 July - 21 July: 1/2'' - 3/4''
22 July - 30 July: 1'' - 1.5''
Today and Fri 14th/15th: Mainly Dry Both Days - May see an Isolated Tshower Late this Afternoon (North of I-80) - Temps 83/88.
Sat thru Wed 16th-20th: Dry/Hot/Very Humid - Temps Low/Mid 90's.
Thurs Thru Mon 21st-25th: Continued Dry - Hot/Humid.
Tues and Wed 26th/27th: Storms - Then Dry/Cooler.
Thurs and Fri 28th/29th: Dry - Seasonal Temps.
Sat 30th: Tshowers.
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