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 286
< Previous MD         Next MD >
MD 286 graphic

   MESOSCALE DISCUSSION 0286
   NWS STORM PREDICTION CENTER NORMAN OK
   0539 PM CDT SUN APR 12 2015

   AREAS AFFECTED...PORTIONS OF DEEP SOUTH TX

   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

   VALID 122239Z - 130045Z

   PROBABILITY OF WATCH ISSUANCE...80 PERCENT

   SUMMARY...AN EWD-PROGRESSING SQUALL LINE WILL ENTER DEEP SOUTH TX BY
   APPROXIMATELY 00-01Z...WITH AN ATTENDANT THREAT OF A FEW DAMAGING
   WIND GUSTS. AS SUCH...WW ISSUANCE WILL LIKELY BE NEEDED SHORTLY.

   DISCUSSION...AS OF 22Z...SATELLITE/RADAR/LIGHTNING DATA CLEARLY
   DEFINED A SQUALL LINE PUSHING EWD AROUND 35 KT ACROSS COAHUILA
   MEXICO. AT ITS CURRENT SPEED...IT WILL CROSS THE RIO GRANDE AROUND
   00-01Z. FOLLOWING THE SQUALL LINE...AN ORGANIZED COLD POOL
   /ILLUSTRATED BY 2-HOUR PRESSURE RISES ACROSS THE BIG BEND/ WILL
   FURTHER SUPPORT THE LINE AS IT PROGRESSES FARTHER EAST...WHERE PRES
   FALLS OF 1-2 MB PER HOUR HAVE BEEN OBSERVED. THE THERMODYNAMIC
   ENVIRONMENT ALSO APPEARS FAVORABLE FOR A WIND THREAT...AS TEMPS
   RISING INTO THE UPPER 70S/LOWER 80S HAVE STEEPENED LOW-LEVEL LAPSE
   RATES ACROSS PORTIONS OF DEEP SOUTH TX. MOREOVER...THE 18Z BRO RAOB
   SAMPLED A MEAN MIXING RATIO OF NEARLY 15 G/KG. WITH THIS LINE
   PUSHING EAST INTO SUCH WARM AND MOIST LOW LEVELS...THE WIND THREAT
   SHOULD PERSIST. AS SUCH...WW ISSUANCE IS ANTICIPATED IN THE NEAR
   FUTURE.

   ..PICCA/HART.. 04/12/2015


   ATTN...WFO...CRP...EWX...BRO...

   LAT...LON   30099987 29589847 28939796 28169758 27399755 26339788
               26129801 26309872 26499909 28130002 29170072 29820164
               30240126 30099987 

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: April 13, 2015
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities