SWODY1
SPC AC 051947
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0147 PM CST THU MAR 05 2009
VALID 052000Z - 061200Z
...NO SVR TSTM AREAS FORECAST...
...NRN HIGH PLAINS...
A STEEP LAPSE RATE ENVIRONMENT HAS DEVELOPED TODAY IN DOWNSLOPE
REGIME PRESENT IN THE WAKE OF PRIMARY SURFACE LOW CURRENTLY OVER THE
UPPER MS VALLEY. WATER VAPOR IMAGERY INDICATES A RELATIVELY
WELL-DEFINED SHORT WAVE TROUGH TRANSLATING ENEWD THROUGH WY...WHICH
WILL SHIFT EWD ACROSS SD TONIGHT. CYCLONIC CIRCULATION OF ENHANCED
CLOUD MASS OVER N-CNTRL WY AS OF 1915Z /PER VIS SATELLITE/ APPEARS
TO BE THE SURFACE MANIFESTATION OF THIS IMPULSE. GIVEN THE STEEP
LAPSE RATES PRESENT...POTENTIAL WILL EXIST FOR ISOLATED TSTM
DEVELOPMENT NEAR AND TO THE E/SE OF THIS CIRCULATION THROUGH THIS
EVENING. ISOLATED LIGHTING STRIKES WILL ALSO BE POSSIBLE ALONG
SECONDARY COLD FRONT PUSHING SEWD THROUGH CNTRL MT.
...CNTRL CA COAST...
LATEST MODEL GUIDANCE INDICATES THAT MID/UPPER-LEVEL LOW ALONG OR
JUST OFF THE COAST IS IN THE PROCESS OF TRANSITIONING INTO AN OPEN
WAVE WHICH WILL MOVE INTO THE LOWER CO VALLEY BY FRIDAY MORNING.
HERE TOO...RUC OBJECTIVE FIELDS SUGGEST THAT A STEEP LAPSE RATE
ENVIRONMENT HAS DEVELOPED...LARGELY DUE TO THE COLD TEMPERATURES
ALOFT /-28 TO -30 C AT 500 MB/. CONVECTIVE BAND APPROACHING THE
COAST W AND SW OF PRB WILL BE CAPABLE OF ISOLATED LIGHTNING STRIKES
AS IT MOVES ONSHORE THIS AFTERNOON. AN ISOLATED STORM OR TWO WILL
BE POSSIBLE ELSEWHERE AS UPPER SYSTEM INTERACTS WITH THE STEEP LAPSE
RATES AND LOCAL TERRAIN.
..MEAD.. 03/05/2009
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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