Severe Local Storm Watch and Watch Cancellation Msg
Issued by NWS

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WWUS20 KWNS 182248
SEL3
SPC WW 182248
NDZ000-SDZ000-190600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 173
NWS STORM PREDICTION CENTER NORMAN OK
545 PM CDT SAT MAY 18 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  SOUTHERN AND CENTRAL NORTH DAKOTA
  CENTRAL SOUTH DAKOTA

* EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 545
  PM UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
  NUMEROUS LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL
    EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH
NORTHEAST OF BISMARCK NORTH DAKOTA TO 50 MILES SOUTHEAST OF
PIERRE SOUTH DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 170...WW 171...WW 172...

DISCUSSION...TSTMS EXPECTED TO INCREASE IN NUMBER AND STRENGTH
ACROSS WW AREA THIS EVE AS BAND OF WEAK LARGE SCALE ASCENT
OVERSPREADS AXIS OF MODERATE SFC-BASED INSTABILITY EXTENDING NEWD
INTO REGION ALONG INVERTED SFC TROUGH. 40+ KT SWLY DEEP SHEAR AND
PERSISTENT LOW-LVL MOISTURE INFLOW SUGGEST POTENTIAL FOR A FEW
SUSTAINED STORMS/SUPERCELLS WITH SVR HAIL/WIND. ACTIVITY MAY MERGE
INTO A BROKEN SQLN LATER TNGT...WITH A CONTINUED RISK FOR SVR
WIND/HAIL AND POSSIBLY A TORNADO.

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 500. MEAN STORM
MOTION VECTOR 24025.


...CORFIDI
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