

589 

WWUS20 KWNS 011832

SEL1

SPC WW 011832

IAZ000-KSZ000-NEZ000-SDZ000-020300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 201

NWS STORM PREDICTION CENTER NORMAN OK

130 PM CDT SUN JUN 1 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN IOWA

  NORTH CENTRAL AND NORTHEAST KANSAS

  CENTRAL AND EASTERN NEBRASKA

  FAR SOUTHEAST SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 130 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS

    TO 2 INCHES IN DIAMETER POSSIBLE

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES EAST

NORTHEAST OF YANKTON SOUTH DAKOTA TO 40 MILES SOUTHWEST OF

CONCORDIA KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



&&



DISCUSSION...STORMS ARE INTENSIFYING ALONG THE SRN FLANK OF A

PERSISTENT MCS OVER NEBRASKA....WITH NEW STORMS DEVELOPING EAST OF

THE COMPLEX.  THE ENVIRONMENT SOUTH AND EAST OF THE SYSTEM IS

INCREASINGLY UNSTABLE WITH MLCAPE TO 2000 J/KG...AND STRENGTHENING

WINDS ALOFT ARE CONTRIBUTING TO FAVORABLE VERTICAL FOR SEVERE

STORMS.  ACTIVITY WILL SPREAD EWD WITH TIME WITH POTENTIAL FOR

PRIMARILY LARGE HAIL AND DAMAGING WIND GUSTS.



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 550. MEAN STORM

MOTION VECTOR 26025.





...WEISS

