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MESOSCALE DISCUSSION 0927
NWS STORM PREDICTION CENTER NORMAN OK
0524 PM CDT WED MAY 14 2008
AREAS AFFECTED...CNTRL/SRN LA
CONCERNING...TORNADO WATCH 321...
VALID 142224Z - 142330Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 321 CONTINUES.
RETRANSMITTED PER REQUEST
THE THREAT FOR ISOLATED TORNADOES...DAMAGING WINDS AND HAIL
CONTINUES ACROSS WW AREA. THROUGH 23Z...THIS THREAT WILL BE
ENHANCED OVER E-CNTRL PORTIONS OF WW AREA...NAMELY OVER
LIVINGSTON...TANGIPAHOA AND ST. TAMMANY PARISHES.
AS OF 2145Z...LOCAL RADAR DATA INDICATED A LARGE AND INTENSE HP
SUPERCELL OVER LIVINGSTON PARISH MOVING 273/25KT. SURFACE
OBSERVATIONS WITHIN INFLOW REGION OF THIS STORM ARE SHOWING
GUSTY...ESELY WINDS...EFFECTIVELY ENHANCING STORM-RELATIVE INFLOW.
BOUNDARY LAYER AIR MASS OVER SRN LA IS QUITE MOIST WITH T/TD SPREADS
OF GENERALLY LESS 7-10 F. GIVEN THE COMBINATION OF RELATIVELY
STRONG LOW-LEVEL SHEAR AND LOW LCL/LFC HEIGHTS...EXPECT ONGOING
SUPERCELL TO MAINTAIN A STRONG LOW-LEVEL MESOCYCLONE CAPABLE OF
ISOLATED TORNADOES. ADDITIONALLY...LARGE HAIL AND DAMAGING OUTFLOW
WINDS WILL ALSO REMAIN POSSIBLE.
ELSEWHERE...TRAILING MCS REMAINS RATHER DISORGANIZED FROM NEAR MCB
SWWD TO LFT. LOCALLY STRONG WIND GUSTS WILL LIKELY CONTINUE ALONG
LEADING EDGE OF SYSTEM COLD POOL ALONG WITH HEAVY RAINFALL.
..MEAD.. 05/14/2008
ATTN...WFO...JAN...LIX...LCH...SHV...
30949368 31829180 31888962 30898944 30338948 30088862
28758893 28809035 29349189 29499369 29719411
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