[LeArc] HWODVN@ 7/17/2003 5:48:08 AM

[learc@mailman.qth.net]

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


FLUS43 KDVN 171045
HWODVN
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-181100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
545 AM CDT THU JUL 17 2003

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING EARLY THIS MORNING... 
MAINLY SOUTH OF INTERSTATE 80...WILL BE CAPABLE OF PRODUCING BRIEF 
HEAVY DOWNPOURS AND CLOUD TO GROUND LIGHTNING. THESE STORMS ARE NOT 
EXPECTED TO BECOME SEVERE AND SHOULD DISSIPATE BY 10 AM. 

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE 
OUTLOOK AREA FOR LATE THIS AFTERNOON INTO THIS EVENING. STORMS ARE 
EXPECTED TO DEVELOP ALONG THE AREA FROM WATERLOO TO DUBUQUE BETWEEN 
3 AND 5 PM THIS AFTERNOON...THEN MOVE SOUTHEAST ACROSS EASTERN 
IOWA...WEST CENTRAL ILLINOIS INTO FAR NORTHEAST MISSOURI THIS 
EVENING. SEVERE WEATHER THREATS INCLUDE DAMAGING WINDS UP TO 70 MPH 
AND HAIL UP TO GOLF BALL SIZE. AN ISOLATED TORNADO IS POSSIBLE.

AN ADDITIONAL WEATHER HAZARD TODAY WILL BE THE HIGH HEAT AND 
HUMIDITY. AFTERNOON HEAT INDICES WILL SOAR AS HIGH AS 100 TO 105 IN 
THE MID AFTERNOON TO EARLY EVENING HOURS.

THUNDERSTORMS WILL DEVELOP AS A COLD FRONT MOVES INTO THE AREA 
AROUND MID AFTERNOON. AT THIS TIME...CONDITIONS ARE EXPECTED TO BE 
HOT AND VERY HUMID...WITH DEWPOINTS AS HIGH AS THE MID 70S TO NEAR 
80 IN EAST CENTRAL IOWA. THIS STRONG INSTABILITY...COMBINED WITH 
FAVORABLE UPPER DIVERGENCE AND WIND SHEAR WILL CREATE IDEAL 
CONDITIONS FOR EXPLOSIVE SEVERE THUNDERSTORM DEVELOPMENT. STORMS ARE 
EXPECTED TO ORGANIZING INTO A LINE AND OVERSPREAD SOUTHEAST IOWA... 
FAR NORTHEAST MISSOURI AND AREAS OF WEST CENTRAL ILLINOIS SOUTH OF 
INTERSTATE 80 BETWEEN 7 PM AND 10 PM. THE MAIN SEVERE WEATHER THREAT 
WILL GRADUALLY SHIFT FROM DAMAGING STRAIGHT LINE WINDS AND LARGE 
HAIL TO HEAVY RAINFALL AFTER SUNSET AS THE STORMS EXIT THE AREA. 
 

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORMS WILL BE POSSIBLE SUNDAY AND MONDAY ACROSS THE AREA. 
AT THIS TIME...THE THREAT OF SEVERE WEATHER IS EXPECTED TO BE QUITE 
LOW. 

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON ACROSS 
EASTERN IOWA...AND THEN ACROSS THE ENTIRE OUTLOOK AREA SOUTH OF 
INTERSTATE 80 THIS EVENING. 

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING INTERNET WEB SITE:
HTTP://WWW.CRH.NOAA.GOV/DVN (ALL LOWER CASE)

$$

SHEETS