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WOUS40 KWNS 301004
ARZ000-ILZ000-MOZ000-301800-
PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0504 AM CDT SUN MAY 30 2004
VALID 301004Z - 301800Z
...OUTBREAK OF SEVERE THUNDERSTORMS INCLUDING A FEW STRONG TORNADOES
AND WIDESPREAD DAMAGING WINDS OVER PARTS OF THE MID MISSISSIPPI
VALLEY TODAY THROUGH TONIGHT.
THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF A FEW STRONG TORNADOES AND WIDESPREAD DAMAGING WINDS
OVER PARTS OF THE MID MISSISSIPPI VALLEY LATER TODAY THROUGH
TONIGHT.
THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE
ARKANSAS
CENTRAL AND SOUTHERN ILLINOIS
SOUTH AND EAST MISSOURI
SURROUNDING THE HIGH RISK IS A MODERATE RISK EXTENDING FROM NORTHERN
ILLINOIS SOUTHWEST TO NORTHEAST TEXAS AND EASTWARD INTO THE WESTERN
OHIO AND TENNESSEE VALLEYS
AN OUTBREAK OF SEVERE THUNDERSTORMS INCLUDING THE POSSIBILITY OF
STRONG TORNADOES...VERY LARGE HAIL AND WIDESPREAD DAMAGING WINDS IS
EXPECTED THIS AFTERNOON AND TONIGHT OVER A LARGE PART OF THE CENTRAL
PORTION OF THE U.S.
AN UNSEASONABLY STRONG UPPER TROUGH IS MOVING EASTWARD INTO THE
CENTRAL U.S. TODAY. ASSOCIATED IS A DEEP SURFACE LOW CENTERED OVER
EASTERN SOUTH DAKOTA WITH A VIGOROUS COLD FRONT EXTENDING SOUTHWARD
THROUGH THE KANSAS CITY AREA AND THEN SOUTHWEST INTO WEST TEXAS.
A STRONG SOUTHERLY FLOW OF VERY MOIST AND UNSTABLE GULF AIR MASS
CONTINUES TO MOVE NORTHWARD THROUGH THE MID MISSISSIPPI...WESTERN
OHIO AND TENNESSEE VALLEYS EARLY THIS MORNING.
WITH DAYTIME HEATING THE COMBINATION OF THE APPROACH OF THE COLD
FRONT AND UPPER TROUGH AND VERY UNSTABLE AIR WILL RESULT IN
WIDESPREAD SEVERE THUNDERSTORMS...INCLUDING SUPERCELLS ...DEVELOPING
BY MID AFTERNOON. WIND SHEAR IS FAVORABLE FOR TORNADIC SUPERCELLS
WITH A FEW STRONG TORNADOES POSSIBLE.
INITIAL DEVELOPMENT WILL LIKELY OCCUR OVER THE LOWER MISSOURI VALLEY
AND THEN MOVE EASTWARD INTO THE OHIO AND TENNESSEE VALLEYS TONIGHT
STORMS WILL DEVELOP INTO SHORT LINES AND BOWS ENHANCING THE WIND
DAMAGE POTENTIAL. THIS ACTIVITY WILL THEN LIKELY CONTINUE MUCH OF
THE NIGHT AS IT MOVES EASTWARD INTO THE MOIST AIRMASS.
THIS IS POTENTIALLY A VERY DANGEROUS SITUATION. THOSE IN THE
THREATENED AREA ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND
TO LISTEN TO RADIO...TELEVISION...AND NOAA WEATHER RADIO FOR
POSSIBLE WATCHES...WARNINGS...AND STATEMENTS LATER TODAY.
..HALES.. 05/30/2004