MESO: Mesoscale Discussion 0519

ACUS11 KWNS 202031
SWOMCD
SPC MCD 202031
MNZ000-SDZ000-NDZ000-NEZ000-202230-

MESOSCALE DISCUSSION 0519
NWS STORM PREDICTION CENTER NORMAN OK
0331 PM CDT FRI APR 20 2007

AREAS AFFECTED...CNTRL/ERN SD AND EXTREME SERN ND

CONCERNING...SEVERE THUNDERSTORM WATCH 152...

VALID 202031Z - 202230Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 152
CONTINUES. /AUTO

INITIAL BURST OF ELEVATED TSTMS THAT YIELDED HAIL TO THE SIZE OF
NICKELS HAS WEAKENED THROUGH MID-AFTN ACROSS NERN SD...PRESUMABLY
OWING TO POSSIBLE STORM COMPETITION/INTERFERENCE. VSBL SATL AND
REGIONAL RADAR SHOW AGITATED ACCAS CONTINUING TO FORM UPSTREAM
ACROSS NCNTRL NEB...ALONG NRN EDGE OF A STRONGER CAP BENEATH THE
ELEVATED MIXED LAYER. THESE GENERATING CELLS WILL LIKELY GROW
UPSCALE INTO TSTMS ACROSS SCNTRL THROUGH NCNTRL/NERN SD THROUGH
EARLY THIS EVE. LAPSE RATES REMAIN STEEP ALOFT AND GIVEN ROUGHLY
40-45 KTS OF SHEAR IN THE CLOUD-LAYER...ROTATING UPDRAFTS WILL BE
LIKELY WITH LARGE HAIL. MOREOVER...LOW-LEVEL LAPSE RATES HAVE
IMPROVED THIS AFTN SUGGESTING THAT UPDRAFTS MAY ROOT INTO THE
BOUNDARY LAYER. THUS...DAMAGING WIND GUSTS ARE NOT OUT OF THE
QUESTION...PARTICULARLY ACROSS CNTRL/SRN SD.

.RACY.. 04/20/2007

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

ATTN...WFO...FGF...FSD...OAX...ABR...BIS...LBF...UNR...

46629831 46629679 46309660 46019660 45679674 45599682
45469670 45379651 45339648 45329695 45299703 45299723
45139719 45139744 44539750 44539781 44179783 44189835
43489830 43499869 43399869 43179809 42989809 42859815
42859823 42949845 42969855 42970209 43130208 43150211
43420211 43500215 43650215 43660206 43770199 44520200
44530182 44580167 44580157 44620147 44690135 44730114
44990110 44990148 45470147 45450092 45490094 45460035
45570043 45640039 45690028 45720026 45900044 45940044
45939985 46279987 46279902 46629901

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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 chris@lib.siu.edu.