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 586
< Previous MD         Next MD >
MD 586 graphic

   MESOSCALE DISCUSSION 0586
   NWS STORM PREDICTION CENTER NORMAN OK
   1125 AM CDT SUN MAY 10 2015

   AREAS AFFECTED...PORTIONS OF CNTRL/WRN AR...FAR ERN OK

   CONCERNING...TORNADO WATCH 154...

   VALID 101625Z - 101830Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 154 CONTINUES.

   SUMMARY...A LINE OF THUNDERSTORMS WITH THE RISK FOR STRONG TO SEVERE
   WIND GUSTS AND POSSIBLE TORNADOES WILL CONTINUE SPREADING EWD/NEWD
   ACROSS PORTIONS OF AR INTO THE AFTERNOON. THE SVR RISK MAY EXTEND E
   OF WW 154...POTENTIALLY REQUIRING AREAL EXTENSION OF THE WW OR
   PERHAPS THE ISSUANCE OF A NEW WW.

   DISCUSSION...THE N/S-ORIENTED SEGMENT OF AN MCS IS ADVANCING
   EWD/NEWD WITH A FORWARD MOTION AROUND 35 KT. DIURNAL HEATING OF A
   MOIST BOUNDARY LAYER CHARACTERIZED BY UPPER 60S TO LOWER 70S SFC
   DEWPOINTS DOWNSTREAM WILL CONTINUE TO DESTABILIZE INFLOW FOR THIS
   SYSTEM...ALLOWING FOR MAINTENANCE OF THE ONGOING MCS ACROSS PARTS OF
   WRN/CNTRL AR INTO THE AFTERNOON. THE LZK VWP SAMPLES 30-40 KT OF
   MID-LEVEL FLOW OFFERING SUFFICIENT DEEP SHEAR FOR THE MAINTENANCE OF
   THE MCS. AS THIS PORTION OF THE MCS BECOMES MORE ORIENTED PARALLEL
   TO THE MEAN CLOUD-LAYER FLOW...FORWARD PROPAGATION MAY BECOME MORE
   SUBTLE...THOUGH THE FEED OF HIGH THETA-E AIR COULD CONTINUE TO
   SUPPORT INTENSE CONVECTION WITH DMGG WIND GUSTS AND SVR HAIL.
   DESPITE GENERALLY UNIDIRECTIONAL FLOW THROUGH THE LOWER/MIDDLE
   TROPOSPHERE SAMPLED BY THE LZK VWP...THE PRESENCE OF 30-40 KT OF
   FLOW IN THE 2-3-KM-AGL LAYER WILL BE ASSOCIATED WITH SUFFICIENT
   LOW-LEVEL SHEAR FOR SOME TORNADO RISK. WITH THE SVR RISK SPREADING E
   OF THE WW...LOCAL AREAL EXPANSION OF THE WW OR THE ISSUANCE OF A NEW
   WW MAY BE NEEDED.

   ..COHEN.. 05/10/2015


   ATTN...WFO...LZK...SHV...TSA...

   LAT...LON   33939465 34979416 36349393 36199161 34809168 33829235
               33469353 33939465 

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 10, 2015
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities