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 570
< Previous MD         Next MD >
MD 570 graphic

   MESOSCALE DISCUSSION 0570
   NWS STORM PREDICTION CENTER NORMAN OK
   0623 PM CDT SUN MAY 11 2014

   AREAS AFFECTED...ERN NEB...SWRN IA

   CONCERNING...TORNADO WATCH 142...

   VALID 112323Z - 120030Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 142 CONTINUES.

   SUMMARY...SIGNIFICANT TORNADO THREAT CONTINUES FROM NEAR LINCOLN NEB
   TOWARD OMAHA INTO SWRN IA. AN ADDITIONAL TORNADO THREAT WILL BE
   PRESENT WITH SUPERCELLS DEVELOPING TO THE WEST OF THE LONG-LIVED
   TORNADIC STORM.

   DISCUSSION...AT 2315Z...A LONG-LIVED TORNADIC SUPERCELL WAS IN NRN
   LANCASTER COUNTY NEBRASKA JUST NORTH OF LINCOLN. THIS STORM HAS
   EVOLVED AN HP-SUPERCELL STRUCTURE WITH SUBSTANTIAL CONVECTION
   DEVELOPING ON ITS REAR FLANK. THIS STORM EVOLUTION CASTS SOME
   UNCERTAINTY REGARDING THE MAGNITUDE OF THE TORNADO THREAT AS IT
   MOVES ENEWD...BUT IT REMAINS IN A VERY FAVORABLE ENVIRONMENT AS IT
   MOVES ALONG A WARM FRONT WHICH HAS BECOME NEARLY STATIONARY TO THE
   SOUTH OF OMAHA. MLCAPE OF 2000-3000 J/KG COMBINED WITH O-1 KM SRH OF
   300-400 M2/S2 WILL CONTINUE TO SUPPORT A THREAT OF DAMAGING
   TORNADOES WITH THIS CELL AS IT APPROACHES OMAHA BY 00Z AND MOVES
   INTO SWRN IA THEREAFTER. 

   FURTHER TO THE WEST...ADDITIONAL SUPERCELLS HAVE DEVELOPED ALONG THE
   NEARLY STATIONARY FRONT AND WILL RIDE ALONG THE BOUNDARY IN A
   SIMILAR FASHION...POSING AN ADDITIONAL TORNADO THREAT NEAR LINCOLN
   BY 00Z. VERY LARGE HAIL AND SIGNIFICANT WIND DAMAGE WILL ALSO BE
   POSSIBLE WITH THESE CELLS IN ADDITION TO THE TORNADO RISK.

   ..DEAN.. 05/11/2014


   ATTN...WFO...DMX...EAX...OAX...GID...

   LAT...LON   40809807 41189787 41429696 41629597 41709514 41649460
               41489427 41329407 41069397 40859415 40629451 40519517
               40499581 40429634 40409692 40389710 40809807 

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 12, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities