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356 

WWUS20 KWNS 232208

SEL5

SPC WW 232208

IDZ000-MTZ000-WAZ000-240500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 435

NWS STORM PREDICTION CENTER NORMAN OK

410 PM MDT WED JUL 23 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IDAHO

  NORTHWESTERN MONTANA

  EASTERN WASHINGTON



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 410 PM

  UNTIL 1100 PM MDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 110

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

SOUTHWEST OF SPOKANE WASHINGTON TO 50 MILES NORTHEAST OF MISSOULA

MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 431...WW 432...WW

433...WW 434...



DISCUSSION...SEASONALLY STG JUXTAPOSITION OF BOUNDARY-LAYER MOISTURE

AND FAVORABLE DEEP-LAYER KINEMATIC PROFILES -- E.G. 50S SFC DEW

POINTS IN LOWER ELEVATIONS AND 40-50 KT EFFECTIVE-SHEAR MAGNITUDES

RESPECTIVELY -- WILL SUPPORT SVR POTENTIAL WITH CONVECTION

INCREASING IN COVERAGE/INTENSITY ATTM ACROSS PORTIONS ERN WA.

ADDITIONAL DEVELOPMENT OVER MTNS OF NRN ID/WRN MT ALSO WILL POSE SVR

WIND/HAIL RISK AS IT MOVES NEWD.



AVIATION...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 22040.





...EDWARDS

