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WWUS20 KWNS 222019

SEL4

SPC WW 222019

MTZ000-NEZ000-SDZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 344

NWS STORM PREDICTION CENTER NORMAN OK

215 PM MDT SAT JUN 22 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  SOUTHEAST MONTANA

  WESTERN NEBRASKA

  WESTERN SOUTH DAKOTA



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 215 PM UNTIL

  800 PM MDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  SEVERAL DAMAGING WIND GUSTS LIKELY WITH A FEW SIGNIFICANT GUSTS

    TO 80 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL

    EVENTS TO 3 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF BUFFALO

SOUTH DAKOTA TO 5 MILES SOUTH SOUTHWEST OF SIDNEY NEBRASKA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 343...



DISCUSSION...STRONG/SEVERE STORM DEVELOPMENT WILL PERSIST AHEAD OF

THE VIGOROUS SHORT WAVE IMPULSE NOW PROGRESSING NORTHEASTWARD ACROSS

SOUTH CENTRAL MONTANA AND WYOMING.  UPSCALE CONVECTIVE GROWTH INTO

ONE OR MORE ORGANIZED STORM CLUSTERS APPEARS POSSIBLE AS UPPER

FORCING SPREADS INTO THE HIGH PLAINS...BUT DISCRETE SUPERCELLS WITH

THE RISK FOR TORNADOES...IN ADDITION TO VERY LARGE HAIL...APPEAR TO

REMAIN POSSIBLE THROUGH AT LEAST 01-02Z.



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 25025.





...KERR

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