UPDATE: SEVERE WEATHER OUTBREAK POSSIBLE WEDNESDAY

[Galvan]

A complex of rain and thunderstorms are expected to spread from out of the mid-Mississippi Valley tonight into the Ohio Valley and western Great Lakes by early tomorrow.

Behind this activity, a cold front and upper trough will spread eastward with severe thunderstorms developing in the afternoon.

The greatest chance for severe storms Wednesday into Wednesday night extends from southern Wisconsin and southwestern Michigan southwestward to Illinois, Indiana, Missouri and the southeastern halves of Kansas and Iowa into Oklahoma. This includes cities such as St. Louis, Mo., Chicago, Ill., Davenport, Iowa, Springfield, Mo. and Tulsa, Okla. Damaging winds, large hail and tornadoes will all be possible.

In addition to the severe threat, heavy rain will accompany the front with some locations picking up 2 or more inches of rainfall.

Strong winds gusting to 55 mph in some locations are expected behind the storm throughout the Plains. Gusty winds (but not as strong as the Plains) are also expected ahead of the front from the mid-Mississippi Valley to the Great Lakes.

High temperatures will range from the chilly 40s and 50s in northern South Dakota and North Dakota to the 70s and 80s stretching from Kansas to the mid-Mississippi Valley.

[Galvan]

PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1136 AM CDT WED MAY 13 2009

...SEVERE THUNDERSTORMS EXPECTED FROM THE CENTRAL/SOUTHERN PLAINS TO
THE MID MISSISSIPPI VALLEY LATER TODAY AND TONIGHT...

THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE
DEVELOPMENT OF TORNADOES...LARGE HAIL AND DAMAGING WINDS FROM THE
CENTRAL/SOUTHERN PLAINS TO THE MID MISSISSIPPI VALLEY LATER TODAY
AND TONIGHT.

THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE

NORTHWEST ARKANSAS
ILLINOIS
SOUTHEAST KANSAS
MISSOURI
OKLAHOMA

ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM NORTH TEXAS TO THE
GREAT LAKES.

SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ALONG A
SHARP COLD FRONT THAT WILL SURGE SOUTHEASTWARD ACROSS THE CENTRAL
PLAINS INTO THE MID MISSISSIPPI VALLEY. THUNDERSTORMS ARE EXPECTED
TO INTENSIFY DURING THE HEAT OF THE DAY AS A VERY MOIST LOW LEVEL
AIRMASS SURGES INTO AN INCREASINGLY CONVERGENT FRONTAL
ZONE...INITIALLY ACROSS PARTS OF SOUTHEAST IA AND WEST CENTRAL
ILLINOIS...THEN DEVELOPING SOUTHWESTWARD ACROSS MISSOURI INTO KANSAS
BY LATE AFTERNOON. THIS ACTIVITY WILL SPREAD SOUTHWARD INTO
OKLAHOMA AND ARKANSAS LATER THIS EVENING. VERY LARGE HAIL AND
DAMAGING WINDS ARE LIKELY WITH MANY STORMS...ALONG WITH A FEW
TORNADOES.

ADDITIONALLY...A MID LEVEL CIRCULATION LOCATED IN SOUTHWESTERN
MISSOURI WILL MOVE ACROSS SOUTHERN MISSOURI THIS AFTERNOON. THIS
FEATURE WILL LIKELY ENHANCE SEVERE POTENTIAL DOWNSTREAM ACROSS PARTS
OF EASTERN/SOUTHERN MISSOURI INTO SOUTHERN ILLINOIS. WIND/MOISTURE
PROFILES WITH THIS CIRCULATION SUGGEST THE POSSIBILITY OF A STRONG
TORNADO OR TWO WITH SUPERCELLS THAT EVOLVE ACROSS THIS REGION. IN
ADDITION...LARGE HAIL AND DAMAGING WINDS SHOULD ALSO BE ANTICIPATED
WITH THESE STORMS.

[[jonrev]]

Sounds like fun...

[Jackluver18]

Oh yay thunderstorms my favorite