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 484
< Previous MD          Next MD >
MD 484 graphic
   
   MESOSCALE DISCUSSION 0484
   NWS STORM PREDICTION CENTER NORMAN OK
   0842 PM CDT FRI APR 13 2007
   
   AREAS AFFECTED...ERN TX INTO WRN AND CNTRL LA
   
   CONCERNING...TORNADO WATCH 135...136...
   
   VALID 140142Z - 140345Z
   
   THROUGH 03-04Z...THE GREATEST TORNADO THREATS APPEAR TO BE: 1) WITH
   PORTION OF BROKEN CONVECTIVE LINE INTERACTING WITH WARM FRONT FROM
   HOPKINS...RAINS AND VAN ZANDT COUNTIES TX EWD TO NEAR GGG.  AND...2)
   OVER CNTRL LA /NEAR AND NE OF POE/ AS STORMS FURTHER INTENSIFY ALONG
   WARM FRONT.  ELSEWHERE...THE SEVERE WEATHER THREAT FOR TORNADO WATCH
   135...136...CONTINUES.
   
   01Z MESOANALYSIS INDICATED SURFACE LOWS N OF CRS AND NNE OF HDO WITH
   COLD FRONT EXTENDING SWWD FROM THIS NRN LOW THROUGH THE HILL COUNTY
   TO SE OF DRT.  MEANWHILE...NRN MOST WARM OR QUASI-STATIONARY
   BOUNDARY EXTENDED EWD FROM THE LOW N OF CRS TO NEAR SHV INTO CNTRL
   MS N OF JAN.  A SECONDARY WARM FRONT /DELINEATING THE RICHEST
   BOUNDARY LAYER AIR MASS/ STRETCHED MORE SEWD FROM THIS NRN LOW TO N
   OF LFK TO N OF POE INTO S-CNTRL LA.
   
   CONVECTIVE LINE FORCED ALONG COLD FRONT CONTINUES TO FEATURE HP
   SUPERCELL TYPE COMPLEX ON NRN END OVER HUNT...HOPKINS AND RAINS
   COUNTIES TX INVOF SURFACE LOW AND WARM/COLD FRONTAL TRIPLE POINT. 
   BASED ON CURRENT MOTION...THIS STORM SHOULD BEGIN TO WEAKEN WITH
   TIME OR BECOME PROGRESSIVELY MORE ELEVATED AS IT ENCOUNTERS MORE
   STABLE...SURFACE-BASED AIR MASS IN PLACE OVER FAR NERN TX.  OTHER
   STORMS IN PROGRESS ALONG CONVECTIVE LINE WILL HAVE THE POTENTIAL TO
   DEVELOP STRONG LOW-LEVEL ROTATION AS THEY PROGRESS EWD AND ENCOUNTER
   ENHANCED NEAR GROUND SHEAR INVOF RETREATING WARM FRONTS.
   
   FARTHER TO THE SE...MORE DISCRETE CONVECTIVE INITIATION HAS OCCURRED
   OVER THE PAST 1 TO 2 HOURS INVOF SRN MOST WARM FRONT OVER W-CNTRL LA
   WITHIN ENVIRONMENT QUITE FAVORABLE FOR SUPERCELL AND TORNADOES /REF.
   00Z SHV AND LCH SOUNDINGS/.  ANY OF THESE STORMS THAT CAN BECOME
   SUSTAINED OVER E-CNTRL/SE TX INTO SWRN INTO CNTRL LA WILL HAVE A
   HIGH POTENTIAL TO PRODUCE TORNADOES...A FEW OF WHICH COULD BE
   SIGNIFICANT.
   
   ..MEAD.. 04/14/2007
   
   
   ATTN...WFO...JAN...LZK...LCH...SHV...TSA...HGX...FWD...OUN...EWX...SJT...
   
   29809643 31429930 34189749 34029464 33359202 32209164
   31129188 30219260 29999373 
   
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: September 21, 2020
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities