

244 

WWUS20 KWNS 061729

SEL7

SPC WW 061729

CTZ000-MAZ000-MEZ000-NHZ000-NJZ000-NYZ000-RIZ000-VTZ000-CWZ000-07010

0-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 497

NWS STORM PREDICTION CENTER NORMAN OK

125 PM EDT SAT SEP 6 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CONNECTICUT

  MASSACHUSETTS

  MAINE

  NEW HAMPSHIRE

  NEW JERSEY

  EASTERN NEW YORK

  RHODE ISLAND

  SOUTHERN VERMONT

  COASTAL WATERS



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 125 PM UNTIL

  900 PM EDT.



* PRIMARY THREATS INCLUDE...

  WIDESPREAD DAMAGING WIND GUSTS TO 70 MPH LIKELY

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EITHER SIDE OF A LINE FROM 80 MILES NORTH NORTHEAST

OF BANGOR MAINE TO 45 MILES WEST SOUTHWEST OF BRIDGEPORT

CONNECTICUT.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



&&



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH THROUGH

EARLY EVE AS SFC HEATING FURTHER DESTABILIZES REGION OF WEAK HEIGHT

FALLS AHEAD OF AMPLIFYING...LARGE-SCALE CANADIAN TROUGH. DEVELOPMENT

SHOULD FOCUS ALONG/AHEAD OF COLD FRONT NOW ENTERING THE MID-HUDSON

VLY AND NRN VT-NH...ALONG LEE TROUGH FROM NRN NJ/SE NY INTO SW NEW

ENGLAND...AND ALONG ARC OF ASCENT ASSOCIATED WITH LONG-LIVED UPR

IMPULSE NOW EXTENDING FROM ERN MA NEWD INTO ERN ME.

AREA VWPS /WITH 40+ KT WLY 3 KM FLOW/ SHOW AMPLE WLY DEEP SHEAR FOR

ORGANIZED/SUSTAINED STORMS...WITH TRANSIENT SUPERCELLS AND SMALL

BOWS POSING A RISK FOR DMGG WIND AND POSSIBLY LOCALLY SVR HAIL. A

TORNADO OR TWO ALSO COULD OCCUR BEFORE STORMS MERGE INTO

LINES/CLUSTERS.



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 26035.





...CORFIDI



252 

WWUS20 KWNS 061729

SEL7

SPC WW 061729

CTZ000-MAZ000-MEZ000-NHZ000-NJZ000-NYZ000-RIZ000-VTZ000-CWZ000-07010

0-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 497

NWS STORM PREDICTION CENTER NORMAN OK

125 PM EDT SAT SEP 6 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CONNECTICUT

  MASSACHUSETTS

  MAINE

  NEW HAMPSHIRE

  NEW JERSEY

  EASTERN NEW YORK

  RHODE ISLAND

  SOUTHERN VERMONT

  COASTAL WATERS



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 125 PM UNTIL

  900 PM EDT.



* PRIMARY THREATS INCLUDE...

  WIDESPREAD DAMAGING WIND GUSTS TO 70 MPH LIKELY

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

  A TORNADO OR TWO POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EITHER SIDE OF A LINE FROM 80 MILES NORTH NORTHEAST

OF BANGOR MAINE TO 45 MILES WEST SOUTHWEST OF BRIDGEPORT

CONNECTICUT.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



&&



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH THROUGH

EARLY EVE AS SFC HEATING FURTHER DESTABILIZES REGION OF WEAK HEIGHT

FALLS AHEAD OF AMPLIFYING...LARGE-SCALE CANADIAN TROUGH. DEVELOPMENT

SHOULD FOCUS ALONG/AHEAD OF COLD FRONT NOW ENTERING THE MID-HUDSON

VLY AND NRN VT-NH...ALONG LEE TROUGH FROM NRN NJ/SE NY INTO SW NEW

ENGLAND...AND ALONG ARC OF ASCENT ASSOCIATED WITH LONG-LIVED UPR

IMPULSE NOW EXTENDING FROM ERN MA NEWD INTO ERN ME.

AREA VWPS /WITH 40+ KT WLY 3 KM FLOW/ SHOW AMPLE WLY DEEP SHEAR FOR

ORGANIZED/SUSTAINED STORMS...WITH TRANSIENT SUPERCELLS AND SMALL

BOWS POSING A RISK FOR DMGG WIND AND POSSIBLY LOCALLY SVR HAIL. A

TORNADO OR TWO ALSO COULD OCCUR BEFORE STORMS MERGE INTO

LINES/CLUSTERS.



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 26035.





...CORFIDI

