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 1297
< Previous MD         Next MD >
MD 1297 graphic

   Mesoscale Discussion 1297
   NWS Storm Prediction Center Norman OK
   0333 PM CDT Wed Jul 12 2017

   Areas affected...Central to northeast IA

   Concerning...Severe potential...Watch possible 

   Valid 122033Z - 122200Z

   Probability of Watch Issuance...40 percent

   SUMMARY...The risk for severe hail and wind should increase as
   storms increase along a cold front. However, this threat may remain
   too spatially confined to warrant a severe thunderstorm watch

   DISCUSSION...A west/east-oriented cluster is ongoing over
   west-central IA centered between the I-80 and US-30 corridors, with
   convection increasing to the northeast along a cold front from Boone
   to Chickasaw counties. A confined plume of moderate to large
   buoyancy is likely present just ahead of the front northeastward
   towards the IA/MN/WI border area of the MS Valley. Farther east
   towards the Quad Cities, remnant cloud cover from early-day
   convection has slowed destabilization. As such, convection may
   remain tied closely to the surface front and struggle to develop far
   eastward amid the modest mid-level westerly flow sampled by Des
   Moines VWP data. This should result in a predominant multicell
   cluster mode with a corridor of severe hail risk initially with
   locally severe wind gusts possible, especially as storms mature.

   ..Grams.. 07/12/2017

   ...Please see for graphic product...


   LAT...LON   42309321 43009233 43419171 43319118 42759111 42199176
               41429256 41249368 41369412 41869413 42309321 

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 12, 2017
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities