

926 

WWUS20 KWNS 171854

SEL4

SPC WW 171854

IAZ000-MNZ000-NEZ000-SDZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 334

NWS STORM PREDICTION CENTER NORMAN OK

155 PM CDT THU JUN 17 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN IOWA

       CENTRAL AND SOUTHERN MINNESOTA

       EASTERN NEBRASKA

       EASTERN SOUTH DAKOTA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 155 PM UNTIL

900 PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 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 25 MILES EAST NORTHEAST OF

ALEXANDRIA MINNESOTA TO 15 MILES SOUTH SOUTHEAST OF OMAHA

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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...CONTINUE...WW 332...WW 333...



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO RAPIDLY INTENSIFY THIS

AFTERNOON OVER EXTREME EASTERN SD/EASTERN NEB AND TRACK EASTWARD

INTO PARTS OF MN/IA.  SHEAR PROFILES ARE FAVORABLE FOR SUPERCELLS

CAPABLE OF VERY LARGE HAIL...DAMAGING WINDS...AND A FEW TORNADOES.

STORMS ARE EXPECTED TO EVENTUALLY ORGANIZE INTO A SQUALL LINE AND

SPREAD ACROSS THE WATCH AREA THIS EVENING.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.





...HART

