

556 

WWUS20 KWNS 281938

SEL6

SPC WW 281938

ARZ000-KSZ000-MOZ000-OKZ000-290200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 366

NWS STORM PREDICTION CENTER NORMAN OK

235 PM CDT SAT JUN 28 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  EXTREME NORTHWEST ARKANSAS

  EXTREME EASTERN KANSAS

  NORTHERN AND WESTERN MISSOURI

  NORTHEAST AND EAST CENTRAL OKLAHOMA



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 235 PM UNTIL

  900 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH OF

CHILLICOTHE MISSOURI TO 30 MILES WEST OF FORT SMITH ARKANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 365...



DISCUSSION...THE LEADING EDGE OF THE MCS MOVING ACROSS NERN OK/SERN

KS HAS BECOME BETTER ORGANIZED THIS AFTERNOON AS IT MOVES INTO AN

INCREASINGLY UNSTABLE ENVIRONMENT WITH MLCAPE OF 2000-2500 J/KG.

VERTICAL SHEAR HAS ALSO BEEN INCREASING AS STRONGER WESTERLY WINDS

ALOFT OVERSPREAD THE AREA IN ASSOCIATION WITH AN UPPER SHORT WAVE

TROUGH LIFTING NEWD ACROSS THE PLAINS.  STORMS ARE EXPECTED TO

INTENSIFY AS THEY MOVE EWD/NEWD...WITH ADDITIONAL STRONG/SEVERE

CONVECTION DEVELOPING INTO NRN MO THIS AFTERNOON.  STRONGEST STORMS

WILL BE CAPABLE OF PRODUCING SEVERE WINDS AND HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 23025.





...WEISS

