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497 

WWUS20 KWNS 131851

SEL7

SPC WW 131851

MNZ000-NDZ000-SDZ000-140300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 467

NWS STORM PREDICTION CENTER NORMAN OK

150 PM CDT TUE JUL 13 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHWEST AND PART OF WEST-CENTRAL MINNESOTA

       CENTRAL AND EASTERN NORTH DAKOTA

       NORTH-CENTRAL AND NORTHEAST SOUTH DAKOTA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 150 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES WEST NORTHWEST OF

HALLOCK MINNESOTA TO 60 MILES SOUTH OF ABERDEEN SOUTH DAKOTA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 464...WW 465...WW 466...



DISCUSSION...RAPID TSTM DEVELOPMENT IS ANTICIPATED THIS AFTERNOON IN

ADVANCE OF EWD-PROGRESSING SURFACE FRONT AND ASSOCIATED...STRONG

UPPER TROUGH TRANSLATING THROUGH THE NRN HIGH PLAINS.  THE AMBIENT

AIR MASS IS MOIST AND MODERATELY UNSTABLE AND WHEN COUPLED WITH

STRENGTHENING LOW AND DEEP-LAYER SHEAR...SETUP APPEARS QUITE

FAVORABLE FOR THE DEVELOPMENT OF INTENSE SUPERCELLS CAPABLE OF LARGE

HAIL AND TORNADOES.



AVIATION...TORNADOES AND 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 28025.





...MEAD

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