SWOMCD
SPC MCD 112253
ALZ000-120030-
MESOSCALE DISCUSSION 0417
NWS STORM PREDICTION CENTER NORMAN OK
0553 PM CDT MON APR 11 2011
AREAS AFFECTED...PARTS OF W CNTRL INTO CNTRL AL
CONCERNING...TORNADO WATCH 130...
VALID 112253Z - 120030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 130 CONTINUES.
WITHIN A SLOWLY EVOLVING PRE-FRONTAL SQUALL LINE...A COLD POOL
APPEARS TO BE STRENGTHENING IN ASSOCIATION WITH AN EMBEDDED SMALL
STORM CLUSTER NOW APPROACHING THE TUSCALOOSA AL AREA. ACTIVITY IS
EMBEDDED WITHIN A STRONG SOUTHWESTERLY DEEP LAYER MEAN FLOW FIELD ON
THE ORDER OF 40-50+ KT...WHICH WILL CONTRIBUTE TO FORWARD
PROPAGATION ALONG A CORRIDOR OF STEEP LOW-LEVEL LAPSE RATES INTO
CENTRAL ALABAMA DURING THE NEXT FEW HOURS. RUC GUIDANCE SUGGESTS
MIXED LAYER CAPE IS ON THE ORDER OF 1000-2000 J/KG...WHICH PROBABLY
WILL MAINTAIN VIGOROUS NEW UPDRAFTS...AND A SWATH OF DAMAGING WIND
GUSTS SEEMS LIKELY ACROSS THE TUSCALOOSA AREA BY 2330Z THROUGH THE
BIRMINGHAM VICINITY BETWEEN 00-01Z.
..KERR.. 04/11/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...
LAT...LON 33348795 33618735 33788697 33598651 33088667 32788750
32848812 33348795
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