HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
845 PM CDT THU APR 22 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...TONIGHT AND FRIDAY

ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS SOUTHEAST NEBRASKA THIS EVENING AND OVER THE REST OF EASTERN NEBRASKA AND SOUTHWEST IOWA LATE TONIGHT. A BETTER CHAnCE OF THUNDERSTORMS WILL BE OVER THE AREA ON FRIDAY. WIDESPREAD SEVERE WEATHER IS NOT EXPECTED TONIGHT. HOWEVER...A FEW STORMS SOUTH OF THE INTERSTATE 80 CORRIDOR MAY BE ACCOMPANIED BY HAIL. SEVERE STORMS ARE POSSIBLE ON FRIDAY... ESPECIALLY DURING THE AFTERNOON AS A WARM FRONT LIFTS ACROSS THE REGION. WHILE LARGE HAIL WILL BE THE PRIMARY THREAT...THUNDERSTORMS NEAR THE WARM FRONT WILL HAVE THE POTENTIAL TO PRODUCE TORNADOES.

.DAYS TWO THROUGH SEVEN...FRIDAY NIGHT THROUGH THURSDAY

THE CHANCE OF SEVERE THUNDERSTORMS WILL CONTINUE INTO THE EVENING ON FRIDAY...WITH GENERAL THUNDERSTORMS CONTINUING INTO SATURDAY...MAINLY ACROSS SOUTHEAST NEBRASKA AND SOUTHWEST IOWA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED FRIDAY AFTERNOON INTO FRIDAY EVENING OVER EASTERN NEBRASKA AND SOUTHWEST IOWA.

MESOSCALE DISCUSSION 0352
NWS STORM PREDICTION CENTER NORMAN OK
0410 PM CDT FRI APR 23 2010

CONCERNING...TORNADO WATCH 81...

VALID 232110Z - 232245Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 81 CONTINUES.

TORNADO WATCH 81 CONTINUES UNTIL 01Z...WITH A RISK FOR ISOLATED TORNADOES/SEVERE HAIL ACROSS WW 81 AND ADJACENT PORTIONS OF NORTHEAST CO/NORTHWEST KS. MONITORING FOR AN INCREASING SEVERE THREAT LATE THIS AFTERNOON/EARLY EVENING ACROSS THE REMAINDER OF SOUTHEAST NEB AND EXTREME NORTHEAST KS/SOUTHWEST IA INTO NORTHWEST MO.

BANDS OF STRONG/SOME SEVERE TSTMS SHOULD CONTINUE TO DEVELOP THROUGH LATE AFTERNOON NEAR THE ARCING OCCLUDED SURFACE FRONT FROM CENTRAL NEB INTO NORTHEAST CO/NORTHWEST KS NEAR THE VERTICALLY STACKED CYCLONE...WHERE AMBIENT VERTICAL VORTICITY/AMPLE LOW LEVEL CAPE WILL CONTINUE TO SUPPORT TO AN ISOLATED TORNADO THREAT THROUGH LATE AFTERNOON.

OTHER STRONG/SEVERE TSTMS COULD DEVELOP LATE THIS AFTERNOON/EARLY EVENING ACROSS SOUTHEAST NEB/PERHAPS FAR NORTHEAST KS INTO SOUTHWEST IA/NORTHWEST MO IN VICINITY OF A SPATIALLY NARROWING WARM/MOIST SECTOR VIA GRADUAL SURFACE OCCLUSION. ALONG WITH MODEST NEAR-SURFACE CONVERGENCE...SPECIAL 20Z OBSERVED RAOBS FROM OMAHA/TOPEKA IMPLY A CAP AROUND 700-750 MB MAY BE INHIBITING TSTM DEVELOPMENT IN AN OTHERWISE INCREASINGLY MOIST/UNSTABLE BOUNDARY LAYER /700-1300 J PER KG MLCAPE/. WHILE THE SCENARIO STILL REMAINS UNCERTAIN...CONVECTIVE TRENDS WILL CONTINUED TO BE MONITORED FOR AN INCREASING SEVERE RISK ACROSS THE MO RIVER VALLEY VICINITY.

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 85
NWS STORM PREDICTION CENTER NORMAN OK
730 PM CDT FRI APR 23 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

FAR WESTERN IOWA
EASTERN AND NORTHEASTERN NEBRASKA

EFFECTIVE THIS FRIDAY NIGHT FROM 730 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST OF ONEILL
NEBRASKA TO 20 MILES EAST OF OMAHA NEBRASKA.

Updated: 4:20 PM MST on May 03, 2010
Observed at Walnut Creek, Golden Valley, Arizona

Temperature 	87.6°F / 30.9°C
Humidity 	11%
Dew Point 	26°F / -3°C
Wind 	        NE at 15.4 mph / 24.8 km/h
Pressure 	31.11 in / 1053.4 hPa (Falling)
Conditions 	Clear
Visibility 	10.0 miles / 16.1 kilometers
UV 	        6 out of 16