Severe Local Storm Watch and Watch Cancellation Msg
Issued by NWS

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000
WWUS20 KWNS 201831
SEL3
SPC WW 201831
MNZ000-NDZ000-SDZ000-210100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 503
NWS STORM PREDICTION CENTER NORMAN OK
130 PM CDT SAT SEP 20 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
  MUCH OF MINNESOTA
  EXTREME SOUTHEAST NORTH DAKOTA
  EXTREME NORTHEAST SOUTH DAKOTA

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 130 PM UNTIL
  800 PM CDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST
OF FARGO NORTH DAKOTA TO 55 MILES EAST NORTHEAST OF SAINT CLOUD
MINNESOTA.  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.

&&

DISCUSSION...STRONG ASCENT WITHIN/BENEATH LEFT EXIT REGION OF
70-80KT MID LEVEL JET WILL BE REALIZED ALONG A COLD FRONT TRACKING
EAST-SOUTHEAST FROM EASTERN ND ATTM. DESPITE LIMITED BOUNDARY LAYER
MOISTURE AHEAD OF THE FRONTAL SURGE WITH SURFACE DEWPOINTS GENERALLY
IN THE LOW-MID 50S F...THE MAGNITUDE OF FORCING/LIFT WILL COINCIDE
WITH STRONG DIURNAL HEATING TO SUPPORT A CONTINUATION OF LOW-TOPPED
CONVECTION IN THE FORM OF LINEAR BOWING SEGMENTS AND POSSIBLY
EMBEDDED SUPERCELL STRUCTURES. THE ACTIVITY DEVELOPING ACROSS
EXTREME SOUTHEAST ND/NORTHEAST SD WILL MOVE ACROSS MUCH OF CENTRAL
MN THROUGH THE REMAINDER OF THE DAY. STRONG TO DAMAGING THUNDERSTORM
WIND GUSTS CAN BE EXPECTED AS THESE STORMS DEVELOP EAST-SOUTHEAST AT
SPEEDS OF AT LEAST 45KT. HAIL TO AN INCH ALSO APPEARS POSSIBLE WITH
A FEW OF THE MORE ROBUST UPDRAFTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM MOTION
VECTOR 29045.


...CARBIN


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