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 1024
< Previous MD         Next MD >
MD 1024 graphic

   Mesoscale Discussion 1024
   NWS Storm Prediction Center Norman OK
   1206 PM CDT Wed Jun 14 2017

   Areas affected...Eastern Iowa...South-central Wisconsin...Northwest
   Illinois...Far Northeast Missouri

   Concerning...Severe potential...Watch possible 

   Valid 141706Z - 141930Z

   Probability of Watch Issuance...60 percent

   SUMMARY...An isolated severe threat is expected to develop this
   afternoon across parts of the mid to upper Mississippi Valley. The
   stronger thunderstorms could have a potential for isolated large
   hail and wind damage. Weather watch issuance may be needed across
   the region as storms intensify and increase in coverage.

   DISCUSSION...The latest surface analysis shows a very moist airmass
   in place across much of the mid to upper Mississippi Valley. Surface
   dewpoints are maximized into the lower to mid 70s F from central
   Missouri northward into western Illinois and southern Wisconsin.
   Surface temperatures have warmed into the 85 to 90 F range along the
   moist corridor which is contributing to moderate instability. The
   RAP is estimating MLCAPE values in the 2000 to 3000 J/kg range. In
   addition, the WSR-88D VWPs at Davenport, IA and Lincoln, IL show
   unidirectional wind profiles with some speed shear from just above
   the surface into the mid-levels. This is resulting in about 30 kt of
   0-6 km shear which will support an isolated severe threat this
   afternoon. Although deep-layer shear appears marginal for
   supercells, organized multicell clusters should be accompanied by
   storms that could produce isolated large hail and wind damage.

   ..Broyles/Hart.. 06/14/2017

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...GRB...LOT...ILX...MKX...LSX...DVN...ARX...DMX...
   EAX...

   LAT...LON   40269020 40948914 41278812 41618740 42358729 43908771
               44768842 44988907 44799008 44269062 43009137 41359285
               39969246 40019105 40269020 

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: June 14, 2017
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities