SWOMCD
SPC MCD 201721
ALZ000-FLZ000-MSZ000-LAZ000-TXZ000-201845-
MESOSCALE DISCUSSION 2246
NWS STORM PREDICTION CENTER NORMAN OK
1121 AM CST THU DEC 20 2007
AREAS AFFECTED...SRN LA...SE MS...SW AL
CONCERNING...TORNADO WATCH 741...742...
VALID 201721Z - 201845Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 741...742...CONTINUES.
AN ISOLATED TORNADO THREAT AND WIND DAMAGE POTENTIAL WILL EXIST
ACROSS SRN LA AND SRN MS MOVING EWD INTO SRN AL EARLY THIS
AFTERNOON. THE GREATEST THREAT SHOULD EXIST IN THE ERN PARTS OF WW
741 AND WW 742. A NEW WW MAY BE NEEDED EAST OF WW 742 BY LATE THIS
AFTERNOON.
THE LATEST RADAR IMAGERY CONTINUES TO SHOW A PERSISTENT BOW ECHO IN
SRN MS ACROSS WW 742 WITH LESS ORGANIZED CONVECTION EXTENDING WSWWD
ACROSS NRN AND WRN WW 741. WATER VAPOR IMAGERY SHOWS A WELL-DEFINED
UPPER-LEVEL TROUGH OVER ERN AR EXTENDING SWD ACROSS SW LA. A 60 KT
JET NEAR 700 MB ASSOCIATED WITH THE SHORTWAVE TROUGH IS LOCATED IN
CNTRL LA INTO SW MS AND IS LIKELY HELPING TO SUPPORT THE BOW ECHO IN
SRN MS. THE BOW ECHO SHOULD BEGIN TO TURN SEWD FAVORING THE GREATER
INSTABILITY AND HIGHER LOW-LEVEL MOISTURE NORTH OF MOBILE AL AND
ALONG THE I-10 CORRIDOR IN THE WRN FL PANHANDLE. A TORNADO OR TWO
ALONG WITH WIND DAMAGE WILL CONTINUE TO BE POSSIBLE WITH THE BOW
INTO EARLY THIS AFTERNOON.
FURTHER WEST ACROSS THE SRN PORTION OF WW 741...REGIONAL WSR-88D
VWPS SHOW STRONG DIRECTIONAL SHEAR AND FAVORABLE SPEED SHEAR FOR
ROTATING STORMS. IN ADDITION...THE LATEST OBJECTIVE ANALYSIS SHOWS
MORE INSTABILITY /SBCAPE VALUES AROUND 800 J/KG/ IS LOCATED ACROSS
SRN LA SUGGESTING THE THREAT FOR SEVERE WILL CONTINUE THIS
AFTERNOON.
.BROYLES.. 12/20/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...MOB...JAN...LIX...LCH...SHV...
29229424 29539437 29679383 29789393 29999382 30069366
30339371 30539363 30729356 30889349 30889267 30909250
30979243 30999232 30939222 30989221 31309220 31349200
31229198 31279188 31289182 31229173 31039166 30969161
31089154 31209156 31279151 31339138 31369120 31349092
31359023 31349005 31168999 31108993 31038981 31038967
31478963 31648980 31768977 31818964 32258969 32258847
32318800 32148804 32078811 31988812 31998763 31908764
31838752 31798750 31438756 31368779 31228759 31008760
30898762 30678740 30558743 30458735 30418743 30358752
30268775 30248806 30208834 29918830 29898848 29548856
29418874 29158866 28878873 28748900 28668937 28648960
28778974 28978975 28818996 28759034 28769063 28709083
28789110 28929127 29019146 29109157 29159161 29109180
29129204 29219217 29219246 29309285 29409310 29529357
29379376
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@PO.UIUC.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.
No comments:
Post a Comment