

679 

WWUS20 KWNS 312046

SEL8

SPC WW 312046

NEZ000-SDZ000-WYZ000-010400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 428

NWS STORM PREDICTION CENTER NORMAN OK

245 PM MDT SUN JUL 31 2016



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  THE NEBRASKA PANHANDLE

  WESTERN SOUTH DAKOTA

  NORTHEAST WYOMING



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 245 PM UNTIL

  1000 PM MDT.



* PRIMARY THREATS INCLUDE...

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



SUMMARY...THUNDERSTORM ACTIVITY NOW DEVELOPING ACROSS THE NORTH

CENTRAL HIGH PLAINS AND BLACK HILLS VICINITY IS EXPECTED TO

INTENSIFY IN THE PEAK AFTERNOON HEATING.  STRONG SURFACE GUSTS MAY

GRADUALLY BECOME MORE COMMON NEAR THE MOST VIGOROUS ACTIVITY...WHICH

IS EXPECTED TO DEVELOP EASTWARD ALONG SURGING OUTFLOWS THROUGH MID

TO LATE EVENING.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHEAST OF

BUFFALO SOUTH DAKOTA TO 65 MILES SOUTH SOUTHEAST OF ALLIANCE

NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 427...



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 500. MEAN STORM

MOTION VECTOR 27030.





...KERR

