

927 

WWUS20 KWNS 020545

SEL5

SPC WW 020545

SDZ000-021300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 715

NWS STORM PREDICTION CENTER NORMAN OK

1245 AM CDT TUE AUG 2 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN SOUTH DAKOTA



EFFECTIVE THIS TUESDAY MORNING FROM 1245 AM UNTIL 800 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF

CHAMBERLAIN SOUTH DAKOTA TO 50 MILES WEST NORTHWEST OF WATERTOWN

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 714...



DISCUSSION...TSTM CLUSTER S OF PIR...AND PERHAPS CLUSTER FARTHER SW

NEAR THE NEB BODER...EXPECTED TO MOVE GENERALLY ENE THROUGH LATER

THIS MORNING.  ADDITIONAL DEVELOPMENT MAY OCCUR PREFERENTIALLY ON N

OR NE SIDE OF THE PIR CLUSTER AS NE/SW COLD FRONT CONTINUES SEWD AND

ENHANCES LOW LVL UPLIFT.  WHILE REGION IS SOMEWHAT REMOVED FROPM

STRONGEST FLOW ALOFT...COMBINATION OF WARM/VERY MOIST LOW LVL AIR

AHEAD OF STORMS...MODERATE SSWLY LLJ...AND WEAK LARGE SCALE ASCENT

ASSOCIATED WITH A DISTURBANCE NOWING MOVING NEWD INTO THE NEB

PANHANDLE /PER WV IMAGERY/ MAY SUPPORT SPORADIC WET MICROBURSTS AND

POSSIBLY MARGINALLY SVR HAIL.



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 550. MEAN STORM

MOTION VECTOR 25030.





...CORFIDI



160 

WWUS20 KWNS 020545

SEL5

SPC WW 020545

SDZ000-021300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 715...RESENT

NWS STORM PREDICTION CENTER NORMAN OK

1245 AM CDT TUE AUG 2 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN SOUTH DAKOTA



EFFECTIVE THIS TUESDAY MORNING FROM 1245 AM UNTIL 800 AM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF

CHAMBERLAIN SOUTH DAKOTA TO 50 MILES WEST NORTHWEST OF WATERTOWN

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

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 714...



DISCUSSION...TSTM CLUSTER S OF PIR...AND PERHAPS CLUSTER FARTHER SW

NEAR THE NEB BORDER...EXPECTED TO MOVE GENERALLY ENE THROUGH LATER

THIS MORNING.  ADDITIONAL DEVELOPMENT MAY OCCUR PREFERENTIALLY ON N

OR NE SIDE OF THE PIR CLUSTER AS NE/SW COLD FRONT CONTINUES SEWD AND

ENHANCES LOW LVL UPLIFT.  WHILE REGION IS SOMEWHAT REMOVED FROM

STRONGEST FLOW ALOFT...COMBINATION OF WARM/VERY MOIST LOW LVL AIR

AHEAD OF STORMS...MODERATE SSWLY LLJ...AND WEAK LARGE SCALE ASCENT

ASSOCIATED WITH A DISTURBANCE NOW MOVING NEWD INTO THE NEB

PANHANDLE /PER WV IMAGERY/ MAY SUPPORT SPORADIC WET MICROBURSTS AND

POSSIBLY MARGINALLY SVR HAIL.



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 550. MEAN STORM

MOTION VECTOR 25030.



...CORFIDI

