

025 

WWUS20 KWNS 090820

SEL9

SPC WW 090820

MNZ000-NDZ000-091500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 519

NWS STORM PREDICTION CENTER NORMAN OK

315 AM CDT MON SEP 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WEST CENTRAL MINNESOTA

  SOUTHEAST NORTH DAKOTA



* EFFECTIVE THIS MONDAY MORNING FROM 315 AM UNTIL 1000 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EITHER SIDE OF A LINE FROM 35 MILES NORTHWEST OF

FARGO NORTH DAKOTA TO 75 MILES EAST OF ABERDEEN SOUTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 518...



DISCUSSION...FORWARD-PROPAGATING/BOW MCS NOW EXTENDING FROM NEAR

ABERDEEN SD TO SW OF JAMESTOWN ND EXPECTED TO CONTINUE ENEWD AT

35-40 KTS. SYSTEM WILL BE MAINTAINED BY 40+ KT NOCTURNALLY-ENHANCED

SWLY LLJ...AND BY ASCENT ASSOCIATED WITH WEAK IMPULSE EJECTING NEWD

AHEAD OF MAIN UPR LOW/TROUGH IN MT. 40+ KT 700 MB SPEED MAX WITH THE

LATTER DISTURBANCE /SAMPLED BY AREA VWPS/...AND POTENTIAL FOR

ADDITIONAL BOWING SEGMENTS TO ARISE FROM INTERSECTION OF EXISTING

BOW WITH WAA STORMS TO ITS N AND E...SUGGEST THE POSSIBILITY FOR

SPORADIC DMGG SFC GUSTS EWD INTO MN...DESPITE PRESENCE OF SFC-BASED

STABLE LAYER.



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 500. MEAN STORM MOTION

VECTOR 24035.





...CORFIDI



037 

WWUS20 KWNS 090820

SEL9

SPC WW 090820

MNZ000-NDZ000-091500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 519

NWS STORM PREDICTION CENTER NORMAN OK

315 AM CDT MON SEP 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WEST CENTRAL MINNESOTA

  SOUTHEAST NORTH DAKOTA



* EFFECTIVE THIS MONDAY MORNING FROM 315 AM UNTIL 1000 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES EITHER SIDE OF A LINE FROM 35 MILES NORTHWEST OF

FARGO NORTH DAKOTA TO 75 MILES EAST OF ABERDEEN SOUTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 518...



DISCUSSION...FORWARD-PROPAGATING/BOW MCS NOW EXTENDING FROM NEAR

ABERDEEN SD TO SW OF JAMESTOWN ND EXPECTED TO CONTINUE ENEWD AT

35-40 KTS. SYSTEM WILL BE MAINTAINED BY 40+ KT NOCTURNALLY-ENHANCED

SWLY LLJ...AND BY ASCENT ASSOCIATED WITH WEAK IMPULSE EJECTING NEWD

AHEAD OF MAIN UPR LOW/TROUGH IN MT. 40+ KT 700 MB SPEED MAX WITH THE

LATTER DISTURBANCE /SAMPLED BY AREA VWPS/...AND POTENTIAL FOR

ADDITIONAL BOWING SEGMENTS TO ARISE FROM INTERSECTION OF EXISTING

BOW WITH WAA STORMS TO ITS N AND E...SUGGEST THE POSSIBILITY FOR

SPORADIC DMGG SFC GUSTS EWD INTO MN...DESPITE PRESENCE OF SFC-BASED

STABLE LAYER.



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 500. MEAN STORM MOTION

VECTOR 24035.





...CORFIDI

