

303 

WWUS20 KWNS 040003

SEL0

SPC WW 040003

MTZ000-NDZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 490

NWS STORM PREDICTION CENTER NORMAN OK

705 PM CDT WED SEP 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST MONTANA

  WESTERN AND CENTRAL NORTH DAKOTA



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 705 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES NORTHWEST

OF SIDNEY MONTANA TO 70 MILES EAST SOUTHEAST OF MINOT NORTH

DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY THIS EVENING INTO TONIGHT AHEAD OF A COLD FRONT AND

ASSOCIATED SHORT-WAVE TROUGH PROGRESSING FROM WEST TO EAST ACROSS

THE WATCH AREA. STRONG VERTICAL SHEAR COUPLED WITH STEEP MID-LEVEL

LAPSE RATES AND INCREASING LOW-LEVEL MOISTURE WILL BE SUPPORTIVE OF

SUPERCELL AND BOWING STRUCTURES CAPABLE OF LARGE HAIL...DAMAGING

WINDS...AND PERHAPS A BRIEF TORNADO OR TWO.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...MEAD



405 

WWUS20 KWNS 040003

SEL0

SPC WW 040003

MTZ000-NDZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 490

NWS STORM PREDICTION CENTER NORMAN OK

705 PM CDT WED SEP 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHEAST MONTANA

  WESTERN AND CENTRAL NORTH DAKOTA



* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 705 PM

  UNTIL 200 AM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5

    INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES NORTHWEST

OF SIDNEY MONTANA TO 70 MILES EAST SOUTHEAST OF MINOT NORTH

DAKOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY THIS EVENING INTO TONIGHT AHEAD OF A COLD FRONT AND

ASSOCIATED SHORT-WAVE TROUGH PROGRESSING FROM WEST TO EAST ACROSS

THE WATCH AREA. STRONG VERTICAL SHEAR COUPLED WITH STEEP MID-LEVEL

LAPSE RATES AND INCREASING LOW-LEVEL MOISTURE WILL BE SUPPORTIVE OF

SUPERCELL AND BOWING STRUCTURES CAPABLE OF LARGE HAIL...DAMAGING

WINDS...AND PERHAPS A BRIEF TORNADO OR TWO.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...MEAD

