SWOMCD
SPC MCD 142119
WAZ000-ORZ000-142315-
MESOSCALE DISCUSSION 2128
NWS STORM PREDICTION CENTER NORMAN OK
0319 PM CST TUE DEC 14 2010
AREAS AFFECTED...PORTIONS OF WRN WA/WRN OREGON
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 142119Z - 142315Z
SHOWERS AND A FEW EMBEDDED THUNDERSTORMS WILL CONTINUE. STRONG WIND
FIELD SUPPORTS LIMITED POTENTIAL FOR AN ADDITIONAL/ISOLATED TORNADO.
RADAR IMAGERY SHOWS WIDESPREAD SHOWERS AND A THUNDERSTORM OR TWO
ACROSS W CENTRAL AND NWRN OREGON AND INTO ADJACENT WRN WA...S OF AN
UPPER CIRCULATION MOVING ONSHORE INVOF VANCOUVER ISLAND. COOLER AIR
ALOFT ASSOCIATED WITH THIS SYSTEM IS YIELDING STEEP LOWER AND MIDDLE
TROPOSPHERIC LAPSE RATES WHICH -- DESPITE VERY LITTLE CAPE -- WILL
SUPPORT CONTINUED/MAINLY WEAK CONVECTION.
THAT BEING SAID...A FEW BRIEFLY STRONGER UPDRAFTS REMAIN
POSSIBLE...AIDED BY STRONG/VEERING FLOW FIELD WITH HEIGHT OBSERVED
ACROSS THIS REGION. THEREFORE...A VERY LOW PROBABILITY THREAT FOR
AN ISOLATED/BRIEF TORNADO WILL EXIST WITH ANY STRONGER CONVECTIVE
CELL THROUGH LATE AFTERNOON.
..GOSS.. 12/14/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SEW...PQR...
LAT...LON 48092293 47992243 47352213 45822186 44662192 44182254
43812319 44192418 46272401 47102327 48092293
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