Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NOAA's National Weather Service   Select to go to the NWS homepage
Storm Prediction Center
navigation bar left  
  navigation bar end cap


 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Mesoscale Discussion 1690
< Previous MD         Next MD >
MD 1690 graphic

   MESOSCALE DISCUSSION 1690
   NWS STORM PREDICTION CENTER NORMAN OK
   0631 PM CDT SAT SEP 06 2014

   AREAS AFFECTED...SRN/ERN NEW ENGLAND

   CONCERNING...SEVERE THUNDERSTORM WATCH 497...

   VALID 062331Z - 070100Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 497
   CONTINUES.

   SUMMARY...ISOLATED DAMAGING WIND THREAT CONTINUES ACROSS MAINLY THE
   SRN VALID PORTION OF WW 497.

   DISCUSSION...AT 2325Z...THE MOST ORGANIZED CONVECTION IN WW 497 HAS
   MOVED OFFSHORE OF ERN ME AND ERN MA. THE MOST ROBUST REMAINING
   STORMS ARE OVER THE LOWER HUDSON VALLEY INTO WRN/NRN CT...ALONG AND
   AHEAD OF A COLD FRONT THAT IS PROGRESSING EWD THROUGH THE REGION. A
   VERY MOIST BOUNDARY LAYER AND TEMPS NEAR 80F ARE SUPPORTING MODERATE
   BUOYANCY FROM THE LOWER HUDSON VALLEY/LONG ISLAND EWD INTO RI/SERN
   MA...BUT POOR LAPSE RATES AND MARGINAL DEEP-LAYER SHEAR HAVE LIMITED
   CONVECTIVE ORGANIZATION IN THIS REGION THUS FAR. HOWEVER...THE RISK
   FOR PRIMARILY ISOLATED WIND DAMAGE WILL CONTINUE UNTIL AROUND 01Z
   BEFORE STORMS BEGIN TO DIMINISH DUE TO DIURNAL BOUNDARY-LAYER
   STABILIZATION. ANY UPSCALE GROWTH OF ONGOING CONVECTION WOULD
   SUPPORT A MORE ROBUST WIND THREAT...BUT WEAK FRONTAL
   CONVERGENCE/LIMITED LARGE-SCALE ASCENT WILL TEND TO LIMIT THIS
   POSSIBILITY. 

   SCATTERED TSTMS CONTINUE ACROSS ERN ME AND PARTS OF MA...BUT THE
   SEVERE THREAT IS THESE AREAS HAS MOSTLY DIMINISHED DUE TO
   STABILIZATION IN THE WAKE OF PRECEDING CONVECTION.

   ..DEAN.. 09/06/2014


   ATTN...WFO...CAR...GYX...BOX...OKX...ALY...BGM...

   LAT...LON   41517459 41987300 42277127 43007020 44116963 44606867
               44526834 43236907 42546968 41757074 40577211 40137303
               40757372 41517459 

Top/All Mesoscale Discussions/Forecast Products/Home
Weather Topics:
Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

NOAA / National Weather Service
National Centers for Environmental Prediction
Storm Prediction Center
120 David L. Boren Blvd.
Norman, OK 73072 U.S.A.
spc.feedback@noaa.gov
Page last modified: September 07, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities