Folks in the affected areas have probably heard about this already, since they've been talking about it for at least a day now. But just in case --

From the NOAA Storm Prediction Center --


PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1125 AM CDT SAT APR 14 2012

...A SIGNIFICANT OUTBREAK OF STRONG TO VIOLENT TORNADOES IS EXPECTED OVER PARTS OF THE CENTRAL AND SOUTHERN PLAINS THIS AFTERNOON AND TONIGHT...

THE NWS STORM PREDICTION CENTER IN NORMAN OK IS FORECASTING THE DEVELOPMENT OF SEVERAL STRONG TO VIOLENT...LONG-TRACK TORNADOES OVER PARTS OF THE CENTRAL AND SOUTHERN PLAINS THIS AFTERNOON AND TONIGHT.

THE AREAS MOST LIKELY TO EXPERIENCE THIS ACTIVITY INCLUDE

CENTRAL AND EASTERN KANSAS
CENTRAL AND EASTERN NEBRASKA
CENTRAL AND NORTH CENTRAL OKLAHOMA

ELSEWHERE...SEVERE STORMS ARE ALSO POSSIBLE FROM...NORTH TEXAS TO IOWA AND SOUTHEAST SOUTH DAKOTA/SOUTHERN MINNESOTA.

A WARM AND HUMID AIR MASS WILL EXPAND NORTHWARD FROM OKLAHOMA TO KANSAS AND NEBRASKA TODAY IN ADVANCE OF A POTENT STORM SYSTEM. MULTIPLE ROUNDS OF DANGEROUS SEVERE THUNDERSTORMS ARE EXPECTED TO IMPACT THE CENTRAL AND SOUTHERN PLAINS THIS AFTERNOON INTO TONIGHT. THUNDERSTORMS...OVER PARTS OF WESTERN KANSAS INTO NEBRASKA LATE THIS MORNING...ARE EXPECTED TO INTENSIFY THROUGH THIS AFTERNOON AS THEY MOVE NORTHEASTWARD/EASTWARD. ADDITIONAL INTENSE STORMS ARE EXPECTED TO DEVELOP NEAR A SURFACE LOW IN CENTRAL NEBRASKA THIS AFTERNOON...AND SOUTHWARD ALONG THE WEST EDGE OF THE HUMID AIR MASS INTO CENTRAL KANSAS AND WESTERN/CENTRAL OKLAHOMA. STRONG WINDS THROUGHOUT THE ATMOSPHERE WILL BE VERY FAVORABLE FOR POWERFUL SUPERCELL THUNDERSTORMS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES...AS WELL AS VERY LARGE HAIL OVER LONG PATHS FROM THIS AFTERNOON UNTIL AT LEAST MIDNIGHT. FAST-MOVING TORNADOES CONTINUING AFTER DARK WILL HEIGHTEN THE RISK TO LIFE AND PROPERTY. SOME OF THE LARGER CITIES THAT MAY BE AFFECTED INCLUDE OMAHA AND LINCOLN NEBRASKA...TOPEKA AND WICHITA KANSAS...AS WELL AS OKLAHOMA CITY AND TULSA OKLAHOMA.

STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS POTENTIALLY 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.