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

Mesoscale Discussion 1443
< Previous MD         Next MD >
MD 1443 graphic

   Mesoscale Discussion 1443
   NWS Storm Prediction Center Norman OK
   0246 PM CDT Fri Aug 04 2017

   Areas affected...Lower Great Lakes/Allegheny Plateau region

   Concerning...Severe Thunderstorm Watch 439...

   Valid 041946Z - 042145Z

   The severe weather threat for Severe Thunderstorm Watch 439

   SUMMARY...Small to, perhaps, marginally severe hail and
   localized/spotty damaging wind gusts will remain possible near
   thunderstorm activity overspreading the region through early

   DISCUSSION...Potential for substantive further organization of
   ongoing pre-cold frontal convective development into the 21-23Z time
   frame is appearing increasing unlikely, as objective analysis
   indicates that deep layer vertical shear remains weak across much of
   the warm sector south and east of Lakes Erie and Ontario.  However,
   mean lower/mid tropospheric wind fields are strengthening to 30-40
   kt across western Pennsylvania and much of New York state.  And this
   could continue to augment severe weather potential with thunderstorm
   activity developing northeastward/eastward across the region through
   the remainder of the afternoon, primarily associated with localized
   enhanced downward transfer of momentum within areas of heavier
   precipitation loading.

   ..Kerr.. 08/04/2017

   ...Please see for graphic product...


   LAT...LON   44457444 42797455 41907539 40527690 39508167 41038075
               42527996 44667708 44457444 

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.
Page last modified: August 04, 2017
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities