

582 

WWUS20 KWNS 270624

SEL0

SPC WW 270624

MNZ000-NDZ000-271400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 540

NWS STORM PREDICTION CENTER NORMAN OK

1225 AM CST TUE JUL 27 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL MINNESOTA

       SOUTHERN AND CENTRAL NORTH DAKOTA



EFFECTIVE THIS TUESDAY MORNING FROM 1225 AM UNTIL 800 AM CST.



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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF

BISMARCK NORTH DAKOTA TO 25 MILES NORTHEAST OF BRAINERD

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 537...WW 538...WW 539...



DISCUSSION...A FEW TSTM CLUSTERS...SOME OF WHICH MAY CONTAINED

SUSTAINED STORMS/SUPERCELLS...EXPECTED TO PERSIST IN AREA OF

MODERATE WAA/MOISTURE INFLOW AHEAD OF SRN STREAM UPR IMPULSE THROUGH

LATER THIS MORNING.  STORMS SHOULD TEND TO MOVE/DEVELOP ESE OR SE

INTO MN WITH TIME...IN TANDEM WITH AREA OF STRONGEST ASCENT.  MAIN

THREAT SHOULD BE LOCALLY DMGG WIND FROM BOWING SEGMENTS...AND

PERHAPS AN ISOLD TORNADO FROM EMBEDDED MESO VORTICES.



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 500. MEAN STORM

MOTION VECTOR 27035.





...CORFIDI



446 

WWUS20 KWNS 270624 CCA

SEL0

SPC WW 270624 CCA

MNZ000-NDZ000-271400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 540...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

125 AM CDT TUE JUL 27 2010



CORRECTED TO CHANGE TO CDT INSTEAD OF CST



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL MINNESOTA

       SOUTHERN AND CENTRAL NORTH DAKOTA



EFFECTIVE THIS TUESDAY MORNING FROM 125 AM UNTIL 900 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF

BISMARCK NORTH DAKOTA TO 25 MILES NORTHEAST OF BRAINERD

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 537...WW 538...WW 539...



DISCUSSION...A FEW TSTM CLUSTERS...SOME OF WHICH MAY CONTAINED

SUSTAINED STORMS/SUPERCELLS...EXPECTED TO PERSIST IN AREA OF

MODERATE WAA/MOISTURE INFLOW AHEAD OF SRN STREAM UPR IMPULSE THROUGH

LATER THIS MORNING.  STORMS SHOULD TEND TO MOVE/DEVELOP ESE OR SE

INTO MN WITH TIME...IN TANDEM WITH AREA OF STRONGEST ASCENT.  MAIN

THREAT SHOULD BE LOCALLY DMGG WIND FROM BOWING SEGMENTS...AND

PERHAPS AN ISOLD TORNADO FROM EMBEDDED MESO VORTICES.



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 500. MEAN STORM

MOTION VECTOR 27035.





...CORFIDI

