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 1256
< Previous MD         Next MD >
MD 1256 graphic

   Mesoscale Discussion 1256
   NWS Storm Prediction Center Norman OK
   1207 PM CDT Fri Jul 07 2017

   Areas affected...southern OH and a large portion of WV

   Concerning...Severe potential...Severe Thunderstorm Watch likely 

   Valid 071707Z - 071800Z

   Probability of Watch Issuance...80 percent

   SUMMARY...A new severe thunderstorm watch will likely be needed by
   130-200 PM EDT as a squall line over west-central OH moves to the
   southeast with a corresponding risk for isolated wind damage.

   DISCUSSION...Radar mosaic during the past hour has shown a
   reorientation of a convective cluster into west-southwest to
   east-northeast squall line.  The Marion, OH ASOS measured a 43-kt
   gust at 1633Z.  Surface conditions over southwest OH have warmed
   into the middle 80s degrees F with cooler temperatures in the upper
   70s over southeastern OH to the north of an outflow boundary. 
   Visible satellite imagery shows a swelling cumulus field across
   southwestern into south-central OH.  To the northeast of the
   early-day outflow, an absence of cumulus has been noted.  This
   likely delineates a southwest-northeast zone in which the boundary
   layer will appreciably destabilize and foster a greater threat for
   wind damage compared to perhaps more of a localized risk to the

   Expecting a gradual intensification of thunderstorms this afternoon.
   Isolated swaths of 50-60 mph winds will be capable of wind damage. 
   An eddy or two embedded within the line may yield a brief/weak
   tornado or swath of wind damage.

   ..Smith/Grams.. 07/07/2017

   ...Please see for graphic product...


   LAT...LON   37708193 39148348 39288258 40678164 38927957 38028074

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: July 07, 2017
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities