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 1472
< Previous MD         Next MD >
MD 1472 graphic

   MESOSCALE DISCUSSION 1472
   NWS STORM PREDICTION CENTER NORMAN OK
   0703 PM CDT SAT JUL 18 2015

   AREAS AFFECTED...SRN LOWER MI THROUGH NRN IND

   CONCERNING...TORNADO WATCH 438...

   VALID 190003Z - 190100Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 438 CONTINUES.

   SUMMARY...SEVERE WEATHER THREAT INCLUDING POTENTIAL FOR A COUPLE OF
   TORNADOES WILL PERSIST THROUGH AROUND 02Z FROM EXTREME SCNTRL LOWER
   MI...NRN IND INTO EXTREME NWRN OH FOLLOWED BY A GRADUAL WEAKENING
   TREND. AT THIS TIME IT DOES NOT APPEAR ANY ADDITIONAL WW ISSUANCE
   WILL BE NECESSARY EAST OF TORNADO WATCH 438.

   DISCUSSION...THIS EVENING A CLUSTER OF STORMS CONTINUES MOVING EWD
   THROUGH SRN LOWER MI AND NRN IND. THE STORMS ARE IN THE PROCESS OF
   INTERACTING WITH A CONVECTIVE OUTFLOW BOUNDARY WHERE EFFECTIVE STORM
   RELATIVE HELICITY IS AROUND 150-200 M2/S2 IN VICINITY OF THIS
   FEATURE. THE TENDENCY FOR STORMS TO INTERACT AND EVOLVE INTO
   CLUSTERS HAS SO FAR BEEN A LIMITING FACTOR FOR A MORE ROBUST TORNADO
   THREAT. THE SEVERE THREAT /INCLUDING DAMAGING WIND...HAIL AND A
   COUPLE OF TORNADOES/ WILL PERSIST NEXT COUPLE HOURS AS STORMS MOVE
   THROUGH REMAINDER OF NRN IND...EXTREME SRN LOWER MI AND EXTREME NWRN
   OH. TREND SHOULD BE FOR STORMS TO EVENTUALLY WEAKEN AS THEY MOVE
   DEEPER ONTO COOL SIDE OF THE OUTFLOW BOUNDARY WHERE THE ATMOSPHERE
   IS LESS UNSTABLE...SO AN ADDITIONAL WW EAST OF TORNADO WATCH 438 IS
   NOT ANTICIPATED.

   ..DIAL.. 07/19/2015


   ATTN...WFO...DTX...IWX...GRR...

   LAT...LON   40628581 41098628 41578550 42228489 42018421 40788428
               40628581 

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: July 19, 2015
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities