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 520
< Previous MD         Next MD >
MD 520 graphic

   MESOSCALE DISCUSSION 0520
   NWS STORM PREDICTION CENTER NORMAN OK
   0944 PM CDT WED MAY 07 2014

   AREAS AFFECTED...NERN NEB / NW IA

   CONCERNING...SEVERE THUNDERSTORM WATCH 128...

   VALID 080244Z - 080415Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 128
   CONTINUES.

   SUMMARY...AN ISOLATED SEVERE THREAT IS EXPECTED TO DEVELOP ACROSS
   NERN NEB AND NW IA OVER THE NEXT FEW HOURS. WIND DAMAGE AND HAIL
   WILL BE THE PRIMARY THREATS. ALTHOUGH THE THREAT SHOULD REMAIN
   MARGINAL...WW ISSUANCE CAN NOT BE RULED OUT LATE THIS EVENING.

   DISCUSSION...THE LATEST WSR-88D RADAR DATA SHOWS A LINE OF STRONG
   THUNDERSTORMS EXTENDING NEWD ACROSS THE VICINITY OF OMAHA NEB.
   ANOTHER SEVERE THUNDERSTORM IS LOCATED JUST TO THE NORTH OF GRAND
   ISLAND NEB. THE HRRR MOVES THIS CONVECTION NEWD ACROSS NERN NEB AND
   EXPANDS CONVECTIVE COVERAGE INTO NW IA LATE THIS EVENING INTO THE
   OVERNIGHT PERIOD. THE THERMODYNAMIC ENVIRONMENT IN NERN NEB AND NW
   IA IS CHARACTERIZED BY MLCAPE IN THE 500 TO 1500 J/KG RANGE WITH SFC
   DEWPOINTS IN THE LOW TO MID 50S F. IN ADDITION...REGIONAL WSR-88D
   VWPS SHOW 45 TO 55 KT OF 0-6 KM SHEAR WITH SUBSTANTIAL SPEED SHEAR
   IN THE MID-LEVELS. THIS MAY BE ENOUGH FOR A MARGINAL WIND DAMAGE
   THREAT WITH THE STRONGER MULTICELLS LATE THIS EVENING. MID-LEVEL
   LAPSE RATES AROUND 8.0 C/KM MAY ALSO RESULT IN SOME HAIL WITH THE
   STRONGER UPDRAFTS.

   ..BROYLES.. 05/08/2014


   ATTN...WFO...DMX...FSD...OAX...GID...

   LAT...LON   43439483 43339427 43029403 42479415 41429552 40819721
               41199846 42299808 43379644 43439483 

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: May 08, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities