Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
ACUS11 KWNS 260850
SWOMCD
SPC MCD 260850
MSZ000-LAZ000-261015-

MESOSCALE DISCUSSION 0782
NWS STORM PREDICTION CENTER NORMAN OK
0350 AM CDT TUE MAY 26 2015

AREAS AFFECTED...SOUTHEAST LA AND SOUTHEAST MS

CONCERNING...TORNADO WATCH 219...

VALID 260850Z - 261015Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 219 CONTINUES.

SUMMARY...LOCALLY STRONG WIND GUSTS AND/OR A TORNADO REMAIN ISOLATED
SEVERE WEATHER THREATS THROUGH THE EARLY MORNING /PRIOR TO SUNRISE/
ACROSS SOUTHEAST PORTIONS OF LA AND MS.  A NEW WATCH IS NOT
ANTICIPATED TO THE EAST OF WW 219.

DISCUSSION...AT 0320Z...MOSAIC RADAR IMAGERY INDICATED THE LEADING
PORTION OF AN EASTWARD-MOVING MCS EXTENDED FROM EXTREME
SOUTH-CENTRAL MS THROUGH SERN LA /NEAR 10 W MSY/ TO OFF THE LA COAST
IN WRN TERREBONNE PARISH.  SOUTH-SOUTHEASTERLY LOW-LEVEL WINDS AHEAD
OF THIS LINE OF STORMS WAS MAINTAINING AN INFLUX OF RICH TROPICAL
MOISTURE WITH SURFACE DEW POINTS IN THE MIDDLE 70S COMMON FROM SERN
LA INTO FAR SERN MS.  THE 00Z SLIDELL SOUNDING MODIFIED FOR THESE
SURFACE DEW POINT VALUES AND SOME INCREASE IN SURFACE TEMPERATURES
THE LAST FEW HOURS INDICATED A SUFFICIENT REDUCTION IN SURFACE-BASED
INHIBITION THAT WOULD SUPPORT A POTENTIAL FOR STRONGER WINDS TO
REACH THE SURFACE.  DESPITE THIS FACTOR...THE CONTINUED EWD
ADVANCEMENT OF THIS MCS IS RESULTING IN IT BECOMING MORE DIVORCED
SPATIOTEMPORALLY FROM GREATER UPPER FORCING FOR ASCENT WITH A
SHORTWAVE TROUGH TRACKING NORTHEAST TOWARD THE MID-SOUTH AND OZARK
PLATEAU.  THE LINE OF STORMS SHOULD CONTINUE TO SPREAD E/ESEWD
THROUGH THE EARLY MORNING WITH THE BEST LOCATIONS TO EXPERIENCE SOME
SEVERE WEATHER THREAT TO BE ACROSS SERN LA AND EXTREME SERN MS WHERE
THE ENVIRONMENT REMAINS MOST UNSTABLE.

..PETERS.. 05/26/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MOB...JAN...LIX...

LAT...LON   29499083 30299046 31228993 30718930 30648842 30288842
            29838880 28928917 28638922 28599067 28849157 29499083



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.