Tornado Watch 55

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 55
NWS STORM PREDICTION CENTER NORMAN OK
350 PM CDT MON MAR 23 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF WESTERN IOWA
SMALL PART OF NORTHWEST MISSOURI
PARTS OF EASTERN NEBRASKA
PARTS OF SOUTHERN SOUTH DAKOTA
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
1000 PM CDT.
TORNADOES...HAIL TO 2 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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES WEST SOUTHWEST OF
FALLS CITY NEBRASKA TO 35 MILES WEST NORTHWEST OF HURON SOUTH
DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES
TORNADO
WATCH NUMBER 53
. WATCH NUMBER 53 WILL NOT BE IN EFFECT AFTER 350
PM CDT. CONTINUE...
WW 54
...
DISCUSSION...THUNDERSTORMS ARE RAPIDLY DEVELOPING NEWD AHEAD OF
VIGOROUS UPPER TROUGH AND SURFACE LOW MOVING ACROSS CENTRAL NEB.
WITH VERY STRONG SHEAR AND ADEQUATE INSTABILITY...SUPERCELLS ARE
LIKELY WITH LARGE HAIL/DAMAGING WINDS AND POTENTIAL TORNADOS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 21045.
IOWA COUNTIES INCLUDED ARE
ADAMS AUDUBON CASS
CRAWFORD FREMONT HARRISON
LYON MILLS MONONA
MONTGOMERY PAGE PLYMOUTH
POTTAWATTAMIE SHELBY SIOUX
TAYLOR WOODBURY
MISSOURI COUNTIES INCLUDED ARE
ATCHISON HOLT NODAWAY
NEBRASKA COUNTIES INCLUDED ARE
ANTELOPE BURT BUTLER
CASS CEDAR COLFAX
CUMING DAKOTA DIXON
DODGE DOUGLAS GAGE
JEFFERSON JOHNSON KNOX
LANCASTER MADISON NEMAHA
OTOE PAWNEE PIERCE
PLATTE RICHARDSON SALINE
SARPY SAUNDERS SEWARD
STANTON THURSTON WASHINGTON
WAYNE
SOUTH DAKOTA COUNTIES INCLUDED ARE
AURORA BEADLE BON HOMME
BROOKINGS BRULE BUFFALO
CHARLES MIX CLAY DAVISON
DOUGLAS GREGORY HAND
HANSON HUGHES HUTCHINSON
HYDE JERAULD KINGSBURY
LAKE LINCOLN LYMAN
MCCOOK MELLETTE MINER
MINNEHAHA MOODY SANBORN
SULLY TODD TRIPP
TURNER UNION YANKTON