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749 

WWUS20 KWNS 180124

SEL0

SPC WW 180124

MSZ000-180800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 670

NWS STORM PREDICTION CENTER NORMAN OK

825 PM CDT WED OCT 17 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHEAST MISSISSIPPI



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 825 PM

UNTIL 300 AM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF TUPELO

MISSISSIPPI TO 40 MILES SOUTH SOUTHEAST OF OXFORD MISSISSIPPI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 667...WW 668...WW 669...



DISCUSSION...BROKEN SQLN WITH LONG-LIVED SUPERCELLS NOW CROSSING

INTO NW MS FROM AR EXPECTED TO CONTINUE EWD INTO NE MS LATER TNGT.

AREA SFC OBSERVATIONS AND PRESSURE CHANGE DATA ...COUPLED WITH VERY

STRONG...DEEPLY VEERING WIND PROFILE AT MEMPHIS...SUGGEST THAT A

COUPLE SUPERCELLS...AND THEIR ATTENDANT TORNADO THREAT...MAY EXTEND

EWD INTO SOMEWHAT DRIER LOW-LVL ENVIRONMENT OVER NE MS GIVEN THE

FAST FORWARD MOTION OF THE STORMS...AND RAPIDLY RECOVERING AIR MASS

JUST ABOVE THE NOCTURNAL SKIN LAYER.



AVIATION...TORNADOES AND 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 27040.





...CORFIDI

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