13 MAY EXTENDED FORECAST

AREA 48HR PRECIP: GRINNELL 2.87 - OTTUMWA 1.32 - WASHINGTON 2.67

13 MAY EXTENDED FORECAST

PRECIP TOTALS RANGED FROM AN INCH TO THREE INCHES EAST OF I-35 AND SOUTH OF I-80 OVER THE PAST 24HRS - WITH THE BULK OF THE THREE INCH RAINFALL IN THE SE 1/3 OF THE STATE........SEVERE WEATHER (LARGE HAIL 1INCH) REPORTS RANGED FROM MARSHALL COUNTY BACK WEST TO DES MOINES AND SOUTH TO MADISON COUNTY.....THERE WAS HALF DOLLAR SIZE HAIL REPORTED IN WINTHOP (APPROX 20N OF CEDAR RAPIDS)......FLOODING IN ALL OF SE IOWA...

DISCUSSION FOR TODAY THRU MONDAY: LOOK FOR SHOWERS TO END THRU THE AFTERNOON BEFORE SKIES GO MOSTLY CLOUDY, AND FINALLY PARTLY CLOUDY OVERNITE....WE SHUD REMAIN DRY THRU OVERNITE SATURDAY WHEN A SLOW MOVING DEEPENING UPPER LEVEL SYSTEM MAKES ITS WAY OUT OF COLORADO AND DRAGS SHOWERS INTO SW IOWA - AND FINALLY SHOWERS/ISOLATED THUNDERSTORMS ACROSS THE SRN 1/2 OF IOWA LATER SUNDAY INTO MONDAY....PRECIP TOTALS LOOK TO BE AROUND 1/4 INCH ALONG I-80 WITH UP TO 1/2 INCH IN EXTREME SRN POW CTY AND SOUTHWARD.....

TODAY 13TH - SHOWERS ENDING THIS AFTERNOON - THEN MOSTLY CLOUDY - TEMP 65 - WEST WIND GUSTING TO 25MPH

FRIDAY THRU MONDAY 14TH-17TH - PARTLY TO MOSTLY CLOUDY - ISOLATED SHOWERS OVERNITE SATURDAY - SUNDAY AFTERNOON/MONDAY MORNING SHOWERS/ISOLATED THUNDER (TOTAL PRECIP FOR POW CTY 1/4 INCH)- THEN PARTLY CLOUDY - TEMP LOW 70'S SATURDAY AND DROPPING TO LOW 60'S SUNDAY AND MONDAY...

TUESDAY THRU THURSDAY 18TH-27TH - PARTLY CLOUDY AND FINALLY DRYING OUT WITH NORMAL MID TO LATE MAY TEMPS! THIS 8-10 DAY PERIOD SHUD PROVE TO BE MUCH DRYER AND WARMER.....THE UPPER LEVEL PATTERN WILL START GOING WITH A WEST TO EAST FLOW RATHER THAN SW TO NE FLOW THAT WE'VE SEEN OVER THE PAST 2 WEEKS. UPPER LEVEL SYSTEMS ENTERING THE WEST COAST NOW WILL SHIFT NORTH TO THE PACIFIC NW AND MOVE THRU THE NORTHERN PLAINS, STAYING NORTH OF US THRU THE PERIOD - AND ANY SECONDARY SYSTEM THAT DOES SPLIT SOUTH, SHUD REMAIN SOUTH OF IOWA WITH HIGH PRESSURE ACHORED OVER THE NORTHERN GREAT LAKES.....THAT'S NOT TO SAY WE CAN'T SEE AN OCCASIONAL SHOWER OR THUNDERSTORM - ESPECIALLY IN THE AFTERNOONS - BUT I DON'T THINK WE'LL SEE WELL ORGANIZED SYSTEMS LIKE WE'VE SEEN LATELY.