[LeArc] Hazardous Weather Outlook

[Steve Hays]

FLUS43 KDVN 100944
HWODVN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
444 AM CDT SUN APR 10 2011

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-110945-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
444 AM CDT SUN APR 10 2011

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

..DAY ONE...TODAY AND TONIGHT

A WIND ADVISORY IS IN EFFECT FOR THE ENTIRE OUTLOOK AREA FROM 11
AM TO 8 PM TODAY. AN INTENSE LOW PRESSURE SYSTEM WILL TRACK FROM
NEBRASKA TO NORTHWEST WISCONSIN TODAY. SUSTAINED SOUTH WINDS OF 30
TO 35 MPH WITH GUSTS TO 40 TO 50 MPH IS EXPECTED. DRIVERS OF HIGH
PROFILE VEHICLES SHOULD USE EXTRA CAUTION. LOOSE OBJECTS MAY BE
BLOWN AROUND BY THE VERY STRONG GRADIENT WINDS.

A STRONG CAP WILL SUPPRESS THUNDERSTORM DEVELOPMENT FOR MUCH OF
TODAY. HOWEVER...A COLD FRONT ARRIVING LATE THIS AFTERNOON IS
EXPECTED TO WEAKEN THE CAP TO ALLOW FOR SCATTERED THUNDERSTORMS TO
FORM ALONG THE FRONT. THE BEST CHANCES FOR STORMS WILL BE LATE
THIS AFTERNOON INTO THE EVENING. THE TORNADO THREAT HAS DIMINISHED
GREATLY AND NOW THE MAIN THREATS FROM THESE STORMS WILL BE DAMAGING
WINDS OF 60 TO 70 MPH AND LARGE HAIL. A MODERATE RISK OF SEVERE
THUNDERSTORMS EXISTS FROM ABOUT HIGHWAY 20 AND NORTHWARD INTO
EASTERN MINNESOTA AND MUCH OF WISCONSIN. THE REMAINDER OF THE
OUTLOOK AREA IS IN A SLIGHT RISK OF SEVERE STORMS FOR LATE THIS
AFTERNOON INTO THE EVENING.

VERY WARM TEMPERATURES OF 85 TO 90...STRONG SOUTH WINDS GUSTING
TO 40 TO 50 MPH...MODERATE RELATIVE HUMIDITIES...AND DRIED
VEGETATION WILL COMBINE TO RESULT IN AN EXTREME THREAT OF GRASS
FIRES TODAY. GRASSLAND FIRE DANGER INDEX VALUES ARE WELL ABOVE 50
INDICATING THE POTENTIAL FOR EXPLOSIVE GRASS FIRE BEHAVIOR.

AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST
FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS.

..DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THURSDAY AND FRIDAY...EPISODES OF LIGHT TO MODERATE RAINFALL TOTALS
WITH POSSIBLY LOCALLY HEAVIER RAIN AMOUNTS ARE EXPECTED OVER THE 2
DAY TIME PERIOD FROM A LARGE SLOW MOVING STORM SYSTEM. ANY HEAVY RAIN
TOTALS COULD RESULT IN FURTHER RISES ON THE ALREADY HIGH RIVER LEVELS
ON THE MISSISSIPPI RIVER.

..SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FROM ABOUT 4 PM TO 10 PM TODAY
INTO THIS EVENING.

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