SWOMCD
SPC MCD 131918
WYZ000-MTZ000-132045-
MESOSCALE DISCUSSION 1549
NWS STORM PREDICTION CENTER NORMAN OK
0218 PM CDT MON JUL 13 2009
AREAS AFFECTED...NRN AND CENTRAL WY
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 131918Z - 132045Z
THE THREAT FOR LARGE HAIL AND DAMAGING WIND GUSTS WILL INCREASE
DURING THE AFTERNOON AS STORMS DEVELOP OVER WY. A WW IS POSSIBLE.
A SEASONABLY STRONG UPPER LEVEL TROUGH IS FORECAST TO CONTINUE
PROGRESSING E ACROSS THE NRN ROCKIES THIS AFTERNOON...RESULTING IN
STRONG LARGE SCALE ASCENT SPREADING INTO WY. 18Z RIW SOUNDING
INDICATES VERY STEEP LAPSE RATES ARE PRESENT ACROSS THE
REGION...WITH ADDITIONAL DESTABILIZATION POSSIBLE WITH APPROACHING
TROUGH AND CONTINUED AFTERNOON HEATING. MODEST SURFACE DEWPOINTS
/LOW TO MID 50S/ AND STRONGLY MIXED BOUNDARY LAYER WILL LIKELY LIMIT
AFTERNOON MLCAPE VALUES TO NO MORE THAN 1000 J/KG. BUT STEEP MID
LEVEL LAPSE RATES COMBINED WITH STRONG DEEP LAYER SHEAR /AOA 50 KT/
MAY RESULT IN ORGANIZED THUNDERSTORM DEVELOPMENT...INCLUDING
POSSIBLE SUPERCELLS. THESE STORMS MAY BE CAPABLE OF PRODUCING LARGE
HAIL AND DAMAGING WIND GUSTS...AND MAY REQUIRE A WW DURING THE NEXT
HR OR TWO.
..GARNER.. 07/13/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...UNR...CYS...BYZ...RIW...
LAT...LON 42540469 42250678 42731019 43501103 44731068 45030808
44830493 43860409 42540469
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.
No comments:
Post a Comment