[LeArc] HWODVN@ 6/25/2003 5:51:13 AM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


FLUS43 KDVN 251048
HWODVN
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-261000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
548 AM CDT WED JUN 25 2003

...HOT AND HUMID AGAIN TODAY...STRONG STORMS POSSIBLE...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN IOWA...
NORTHWEST AND WEST CENTRAL ILLINOIS...AND NORTHEAST MISSOURI.

.DAY ONE...TODAY AND TONIGHT...

WARM AND MOIST SOUTHERLY FLOW WILL AGAIN BOOST TEMPERATURES INTO THE
LOW TO MID 90S TODAY...AND DEWPOINTS WILL BE IN THE 70S. THIS
COMBINATION OF VERY WARM TEMPERATURES AND HIGH DEWPOINTS WILL PRODUCE
HEAT INDICES AROUND 100 AGAIN OVER MUCH OF THE AREA...WITH SOME
LOCALIZED SPOTS REACHING 103 TO 105 DEGREE VALUES. IF YOU PLAN TO BE
OUTSIDE TODAY...AVOID PROLONGED EXPOSURE OR STRENUOUS PHYSICAL
ACTIVITY. DRINK PLENTY OF FLUIDS TO AVOID DEHYDRATION. WEAR
LIGHTWEIGHT...LIGHT-COLORED...LOOSE-FITTING CLOTHING.  WEAR A HAT TO
SHIELD YOURSELF FROM THE SUN...AND USE A SUNSCREEN TO REDUCE POSSIBLE
SUNBURN.

ATTENTION THEN TURNS FROM THE HEAT...TO STRONG THUNDERSTORM POTENTIAL
TODAY AND ESPECIALLY TONIGHT. THE VERY WARM AND UNSTABLE AIRMASS IN
PLACE ACROSS THE AREA IS JUST WAITING TO FUEL STRONG THUNDERSTORM
DEVELOPMENT. THE FIRST POTENTIAL WILL BE IF AN OUTFLOW BOUNDARY FROM
A DECAYING THUNDERSTORM COMPLEX OVER NORTHWEST IOWA CAN MAKE IT DOWN
INTO EASTERN IOWA TODAY. THIS FEATURE WOULD ACT AS A FOCAL POINT
FOR SOUTHERLY WINDS IN THE LOWER LEVELS OF THE ATMOSPHERE...TO
IMPACT ON AND PRODUCE THUNDERSTORMS. THIS SCATTERED THUNDERSTORM
ACTIVITY WILL BE POSSIBLE WEST OF THE MISSISSIPPI RIVER FROM MID
MORNING AND INTO THE AFTERNOON. WARM AIR ALOFT WILL TRY TO ACT TO
SUPPRESS THUNDERSTORM DEVELOPMENT TODAY...BUT IT STILL CAN'T BE RULED
OUT. IF SOME STORMS CAN PUNCH THROUGH THE WARM LAYER ALOFT AND
DEVELOP THIS AFTERNOON...THEY MAY QUICKLY BECOME SEVERE WITH DAMAGING
WINDS OR A DOWNBURST. IF A STORM CAN INTENSIFY ALONG A ROLLING
OUTFLOW BOUNDARY...A TORNADO WILL BE POSSIBLE WITH THE EXPLOSIVE
STORM DEVELOPMENT EXPECTED. WARM AIR ALOFT AND HIGH FREEZING LEVELS
WILL HINDER LARGE HAIL DEVELOPMENT...BUT HAIL UP TO 1 INCH FROM AN
INTENSE STORM MAY STILL BE ABLE TO REACH THE SURFACE.

AFTER THE CHANCE OF STRONG STORMS TODAY...A BETTER CHANCE OF STRONG
STORMS AND MORE WIDESPREAD ACTIVITY WILL OCCUR THIS EVENING AND
OVERNIGHT. A COLD FRONT WILL SWEEP ACROSS THE AREA FROM THE WEST...
AND PRODUCE A LINE OR LINEAR COMPLEX OF STRONG TO SEVERE
THUNDERSTORMS. PROJECTED VERTICAL WIND FIELDS IN A UNIFORM DIRECTION
AHEAD OF THE FRONT...SUGGEST DAMAGING STRAIGHT LINE WINDS OF 60 TO 70
MPH WILL BE THE MAIN SEVERE WEATHER THREAT FROM TONIGHTS STORMS.
CURRENT INDICATIONS SUGGEST MOST OF THE STORM ACTIVITY TONIGHT SHOULD
END WEST OF THE MISSISSIPPI RIVER BY 11 PM...AND EAST OF THE RIVER BY
1 AM.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...
SHOWERS AND SOME THUNDERSTORMS WILL BE POSSIBLE ON SATURDAY.


.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS POSSIBLE TODAY ALONG AND WEST OF THE
MISSISSIPPI RIVER...AND LIKELY TONIGHT ACROSS THE ENTIRE AREA.

&&

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL:
HTTP://WWW.CRH.NOAA.GOV/DVN

Lightning Awareness Week - June 22-28, 2003.
at http://www.lightningsafety.noaa.gov

$$

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