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WWUS20 KWNS 101933

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CTZ000-MAZ000-RIZ000-CWZ000-110100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 571

NWS STORM PREDICTION CENTER NORMAN OK

330 PM EDT FRI AUG 10 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN CONNECTICUT

       CENTRAL AND EASTERN MASSACHUSETTS

       RHODE ISLAND

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 330 PM UNTIL 900

PM EDT.



TORNADOES...HAIL TO 0.5 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 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF BOSTON

MASSACHUSETTS TO 40 MILES EAST SOUTHEAST OF BLOCK ISLAND RHODE

ISLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...TSTMS EXPECTED TO CONTINUE MOVING NEWD IN ASSOCIATION

WITH MID LVL VORT AND ASSOCIATED SFC WAVE NOW NEARING THE CT CST.

WHILE LOW LVL LAPSE RATES WILL REMAIN WEAK...RICH LOW LVL MOISTURE

AND FAIRLY WARM SFC TEMPS AHEAD OF THE VORT SUGGEST POTENTIAL FOR

CONTINUED DEVELOPMENT OF DISCRETE STORMS/SHOWERS ALONG AND SE OF

VORT TRACK.  RECENT OKX VWP DATA APPEAR TO CAPTURE ENHANCED WIND

FIELD ACCOMPANYING VORT...WITH LOW LVL WINDS BACKING AND

STRENGTHENING AHEAD OF IT. SETUP MAY THEREFORE YIELD A FEW

STORMS/UPDRAFTS WITH LOW LVL ROTATION AND A RISK FOR ISOLD TORNADOES

THROUGH EARLY EVE.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 21030.





...CORFIDI

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