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000
AWUS83 KDMX 222051
RWSDMX
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086-
092>097-230200-

WEATHER SUMMARY FOR IOWA
NATIONAL WEATHER SERVICE DES MOINES IA
340 PM CDT WED MAY 22 2013

SCATTERED LIGHT SHOWERS WERE COMMON OVER IOWA THROUGH THE AFTERNOON
HOURS.  IN ADDITION TO THE SHOWERS...THE CLOUD COVER IMPACTED
TEMPERATURES ACROSS THE STATE WITH READINGS BY 3 PM ONLY IN THE
LOWER TO MID 50S NORTHWEST TO THE LOWER TO MID 60S SOUTHEAST.  THE
WIND OVER WESTERN IOWA WAS OUT OF THE NORTH AT 15 TO 20 MPH WHILE
OVER THE SOUTHEAST THE WIND WAS OUT OF THE WEST AT 10 TO 15
MPH.

A LARGE AND SLOW MOVING LOW PRESSURE SYSTEM OVER NORTHEAST IOWA WAS
RESPONSIBLE FOR THE CLOUDY...COOL AND SHOWERY WEATHER OVER THE STATE
TODAY.  THE CLOUDS FROM THIS SYSTEM WERE FAIRLY EXPANSIVE...
SPREADING FROM CENTRAL MINNESOTA ALL THE WAS ACROSS MISSOURI AND
FROM THE GREAT LAKES ALL THE WAY WEST TO NEBRASKA AND SOUTH DAKOTA.
CLOUDY SKIES AND SCATTERED SHOWERS CAN BE EXPECTED ACROSS MUCH OF
THE UPPER MIDWEST TONIGHT THROUGH MID DAY THURSDAY WITH CLEARING
FROM NORTHWEST TO SOUTHEAST.  THE COLDER AIR DRAWN DOWN FROM THIS
SYSTEM WILL REMAIN IN PLACE HOWEVER THROUGH THE REST OF THE WEEK.

THE WEATHER WILL NOT IMPROVE FOR THE MEMORIAL DAY WEEKEND.  ALOFT
HIGH PRESSURE WILL RESIDE OVER THE REGION BUT SEVERAL UPPER LEVEL
DISTURBANCES WILL RIDE OVER THE TOP OF THE RIDGE AND FLATTEN IT
KEEPING GENERALLY COOL TEMPERATURES IN PLACE ALONG WITH CHANCES FOR
PRECIPITATION WITH EACH PASSING DISTURBANCE.  SURFACE LOW PRESSURE
WILL DEVELOP EAST OF THE ROCKIES AND A WARM FRONT FROM THAT LOW WILL
RESIDE ACROSS THE UPPER MIDWEST THROUGH EARLY NEXT WEEK.  THE
FRONTAL BOUNDARY WILL MEANDER FROM NORTHERN MISSOURI THROUGH
SOUTHERN IOWA PROVIDING A FOCUS FOR THUNDERSTORM ACTIVITY THROUGH AT
LEAST MONDAY.

HIGHS THROUGH MEMORIAL DAY WILL BE BELOW NORMAL WITH READINGS IN THE
MID 60S TO LOWER 70S.  TEMPERATURES SOUTH OF THE WARM FRONT WILL
RANGE FROM 75 TO 80 BUT IT IS DIFFICULT AT THIS POINT TO KNOW WHERE
THE BOUNDARY WILL END UP.  IT IS POSSIBLE THAT FAR SOUTHWEST OR
WESTERN IOWA AND LOCATIONS SOUTH AND WEST WILL SEE THESE KIND OF
HIGHS SUNDAY AND MONDAY BUT MOST OF THE REGION WILL BE IN THE COOL
AIR.

&&

THE NATIONAL WEATHER SERVICE IN DES MOINES WILL DISCONTINUE THE
ISSUANCE OF THE 920 PM REGIONAL WEATHER SUMMARY EFFECTIVE
JUNE 15 2013.  AFTER THAT DATE...THE REGIONAL WEATHER SUMMARY
WILL ONLY BE ISSUED AROUND 500 AM...1100 AM... AND 500 PM.

IF THERE ARE QUESTIONS OR COMMENTS ABOUT THIS CHANGE...PLEASE
EMAIL /IN ALL LOWERCASE/ JEFF.JOHNSON...AT SYMBOL...NOAA.GOV OR
CALL 515.270.4501 EXTENSION 726.


&&

THE NATIONAL WEATHER SERVICE IN DES MOINES WILL DISCONTINUE THE
ISSUANCE OF THE 920 PM REGIONAL WEATHER SUMMARY EFFECTIVE JUNE 15
2013.  AFTER THAT DATE...THE REGIONAL WEATHER SUMMARY WILL ONLY BE
ISSUED AROUND 500 AM...1100 AM...AND 500 PM.

IF THERE ARE QUESTIONS OR COMMENTS ABOUT THIS CHANGE...PLEASE
EMAIL /IN ALL LOWERCASE/ JEFF.JOHNSON...AT SYMBOL...NOAA.GOV OR
CALL 515.270.4501 EXTENSION 726.

$$

FAB