

387 

WWUS20 KWNS 172054

SEL3

SPC WW 172054

NDZ000-SDZ000-180300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 463

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT SUN AUG 17 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL NORTH DAKOTA

  NORTH CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST OF

MOBRIDGE SOUTH DAKOTA TO 60 MILES NORTH NORTHWEST OF DEVILS LAKE

NORTH 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 462...



DISCUSSION...WIDELY SCATTERED STORMS ARE BEGINNING TO INCREASE OVER

SWRN AND NORTH CENTRAL ND IN ADVANCE OF A SHORT WAVE TROUGH MOVING

EWD FROM MT.  THE ENVIRONMENT IS MODERATELY UNSTABLE WITH CAPE TO

2000 J/KG...AND SUFFICIENT VERTICAL SHEAR IS PRESENT TO SUPPORT

ORGANIZED MULTICELL AND ISOLATED SUPERCELL STORM STRUCTURES.

ACTIVITY SHOULD SPREAD EWD INTO THE EVENING WITH A THREAT FOR LARGE

HAIL AND STRONG WIND GUSTS.



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 450. MEAN STORM

MOTION VECTOR 26025.





...WEISS



432 

WWUS20 KWNS 172054

SEL3

SPC WW 172054

NDZ000-SDZ000-180300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 463

NWS STORM PREDICTION CENTER NORMAN OK

355 PM CDT SUN AUG 17 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND CENTRAL NORTH DAKOTA

  NORTH CENTRAL SOUTH DAKOTA



* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 355 PM UNTIL

  1000 PM CDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST OF

MOBRIDGE SOUTH DAKOTA TO 60 MILES NORTH NORTHWEST OF DEVILS LAKE

NORTH 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 462...



DISCUSSION...WIDELY SCATTERED STORMS ARE BEGINNING TO INCREASE OVER

SWRN AND NORTH CENTRAL ND IN ADVANCE OF A SHORT WAVE TROUGH MOVING

EWD FROM MT.  THE ENVIRONMENT IS MODERATELY UNSTABLE WITH CAPE TO

2000 J/KG...AND SUFFICIENT VERTICAL SHEAR IS PRESENT TO SUPPORT

ORGANIZED MULTICELL AND ISOLATED SUPERCELL STORM STRUCTURES.

ACTIVITY SHOULD SPREAD EWD INTO THE EVENING WITH A THREAT FOR LARGE

HAIL AND STRONG WIND GUSTS.



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 450. MEAN STORM

MOTION VECTOR 26025.





...WEISS

