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 1255
< Previous MD         Next MD >
MD 1255 graphic

   Mesoscale Discussion 1255
   NWS Storm Prediction Center Norman OK
   1022 AM CDT Fri Jul 07 2017

   Areas affected...northern into east-central IN...west-central and
   central OH

   Concerning...Severe Thunderstorm Watch 401...

   Valid 071522Z - 071615Z

   The severe weather threat for Severe Thunderstorm Watch 401

   SUMMARY...Additional thunderstorm intensification will likely
   require further boundary layer heating and more storm-scale
   organization for the wind damage threat to increase.

   DISCUSSION...Subjective surface mesoanalysis places a decaying
   outflow boundary from south-central OH northwestward into northwest
   OH where the gradient becomes less defined.  An appreciably
   moist/unstable airmass resides near and to the west of the outflow
   with surface temperatures rising into the lower 80s degrees F with
   lower 70s dewpoints.  Forecast soundings across eastern IN and
   western OH show temperatures warming into the upper 80s by early to
   mid afternoon which will contribute to a more unstable boundary

   Adjustments on the storm-scale will probably be required for the
   wind-damage risk to increase in the near term across portions of
   east-central IN and west-central OH.  A gust front has become
   slightly displaced to the south and southwest of the ongoing
   thunderstorm activity.  Once deeper updrafts develop today (echo
   tops increasing from 35-40 kft to 40-50 kft), it will signal more
   vigorous thunderstorms and a corresponding uptick in the severe risk
   will probably materialize.

   ..Smith.. 07/07/2017

   ...Please see for graphic product...


   LAT...LON   39548496 41098677 41618656 41418426 40798261 40058229
               39188279 38988353 39548496 

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