SWODY1
SPC AC 091259
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0659 AM CST FRI NOV 09 2007
VALID 091300Z - 101200Z
..NO TSTM AREAS FORECAST...
..SYNOPSIS...
GRADUAL EASTWARD PROGRESSION OF THE ROCKIES MID LEVEL RIDGE AND THE
DOWNSTREAM ERN TROUGH ARE EXPECTED AS A SERIES OF EMBEDDED SHORTWAVE
TROUGHS TRANSLATE FROM THE UPPER MS AND OH VALLEYS TO THE CENTRAL
APPALACHIANS/MID ATLANTIC COAST...AND SEPARATE TROUGHS MOVE INLAND
OVER THE PAC NW AND CA. LOW-LEVEL MOISTURE AND INSTABILITY WILL BE
QUITE LIMITED IN ASSOCIATION WITH THESE SYSTEMS. ANY THREAT FOR AN
ISOLATED LIGHTNING STRIKE OR TWO WILL BE LIMITED TO THE CENTRAL
APPALACHIANS THIS EVENING...WHERE RELATIVELY COLD PROFILES AND
CONDITIONALLY UNSTABLE LOW-MID LEVEL LAPSE RATES CONTRIBUTE TO
MUCAPE VALUES OF 50-200 J/KG.
ELSEWHERE...A MODIFYING CONTINENTAL POLAR AIR MASS IS RETURNING NWD
FROM THE EXTREME WRN GULF INTO E TX. BOUNDARY LAYER DEWPOINTS HAVE
REACHED THE MID 60S ACROSS THIS AREA...AND WEAK INSTABILITY WILL
DEVELOP BY AFTERNOON WITH INSOLATION. HOWEVER...12Z SOUNDINGS SHOW
POOR LAPSE RATES IN THE 700-500 MB LAYER...AND THE LARGER SCALE
REGIME SUGGESTS LITTLE TO FOCUS THE INITIATION OF ANYTHING OTHER
THAN A FEW SHALLOW /WARM RAIN PROCESS/ CONVECTIVE SHOWERS.
.THOMPSON/LEVIT.. 11/09/2007
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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