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 1437
< Previous MD         Next MD >
MD 1437 graphic

   MESOSCALE DISCUSSION 1437
   NWS STORM PREDICTION CENTER NORMAN OK
   0917 PM CDT TUE JUL 22 2014

   AREAS AFFECTED...PORTIONS WRN SD...NERN WY...SERN MT...WRN NEB.

   CONCERNING...SEVERE THUNDERSTORM WATCH 430...

   VALID 230217Z - 230345Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 430
   CONTINUES.

   SUMMARY...CONTINUE REMAINING PORTIONS WW.  NEW WW MAY BE REQUIRED
   WITHIN THIS HOUR FOR PORTIONS WRN NEB.

   DISCUSSION...THREE PRINCIPAL AREAS OF SVR CONVECTION REMAIN...WITH
   ONE POSING GREATER RELATIVE THREAT THROUGH LATE EVENING.  

   1. CONVECTION OVER SWRN SD...ANCHORED BY SUPERCELL THAT HAS PRODUCED
   HAIL ESTIMATED UP TO 2.75 INCH DIAMETER IN NERN WY SINCE 00Z. 
   THOUGH LARGE/DAMAGING  HAIL REMAINS POSSIBLE...MAIN THREAT MAY
   BECOME DAMAGING WIND AS THIS ACTIVITY MOVES SEWD INTO REGIME OF WEAK
   BUT SLOWLY INCREASING MLCINH OVER NWRN SANDHILLS REGION.  BUILDING
   COLD POOL AND/OR INTERNAL SUPERCELL DYNAMICS MAY YIELD FORCED ASCENT
   OF FAVORABLY MOIST BOUNDARY-LAYER AIR FOR SOME DISTANCE INTO NEB. 
   MEANWHILE SFC-850-MB LAYER FLOW SHOULD CONTINUE OBSERVED VEERING
   TRENDS AND ENHANCED STORM-RELATIVE INFLOW VECTORS. 
   2. ISOLATED SUPERCELL MOVING SEWD TOWARD NRN MEADE COUNTY MAY REACH
   ERN PENNINGTON COUNTY BEFORE WEAKENING.
   3. CLUSTER OF SVR TSTMS WITH HISTORY OF PRODUCING SVR GUSTS NEAR BIL
   MAY MOVE INTO WRN PORTIONS WW BEFORE WEAKENING...BUT EVENTUALLY WILL
   ENCOUNTER DIABATICALLY STABILIZING AIR MASS.

   ..EDWARDS.. 07/23/2014


   ATTN...WFO...LBF...UNR...CYS...BYZ...

   LAT...LON   42930388 43410489 43720519 44040456 44400526 44670596
               45070635 45650638 45720502 45630391 45420336 45390263
               45110169 43890135 41820098 41770282 42930388 

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 23, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities