DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 171936
SWODY1
SPC AC 171934

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0134 PM CST SAT NOV 17 2012

VALID 172000Z - 181200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
CURRENT FORECAST REMAINS ON TRACK...WITH WIDESPREAD SHOWERS ONGOING
ACROSS THE WEST AND SHOWERS AND EMBEDDED THUNDERSTORMS ONGOING NEAR
AND JUST OFF THE SERN U.S. COAST.

ONLY MINOR TWEAKS OF THE THUNDER AREAS ARE BEING IMPLEMENTED THIS
FORECAST...WITH THUNDER SPREADING PERHAPS A BIT FARTHER INLAND
ACROSS NERN FL THAN EARLIER ANTICIPATED. OTHERWISE...WILL MAINTAIN
A THUNDER AREA HERE...AS WELL AS ALONG THE PAC NW COAST THROUGH THE
END OF THE PERIOD.

..GOSS.. 11/17/2012

.PREV DISCUSSION... /ISSUED 0954 AM CST SAT NOV 17 2012/

...SYNOPSIS...
A TROUGH OVER THE SOUTHEAST CONUS AND GULF OF MEXICO WILL MOVE VERY
LITTLE TODAY. SHOWERS AND THUNDERSTORMS CURRENTLY ONGOING FROM THE
FL EAST COASTAL WATERS TO THE OFFSHORE WATERS EAST OF THE CAROLINAS
ARE EXPECTED TO CONTINUE AHEAD OF THE TROUGH TODAY AND TONIGHT.
FARTHER WEST...A SHORTWAVE TROUGH AND ATTENDANT SFC LOW/COLD FRONT
WILL MOVE ACROSS THE PACIFIC NORTHWEST THROUGH THE PERIOD. ISOLATED
THUNDERSTORMS ALONG THE WA/ORE COAST AND ADJACENT OFFSHORE WATERS
WILL BE POSSIBLE THIS AFTERNOON AND EVENING AS UPPER IMPULSE
PROVIDES DEEP LAYER ASCENT IN A STEEP LAPSE RATE/WEAKLY UNSTABLE
ENVIRONMENT. ANOTHER SHORTWAVE IMPULSE CURRENTLY LOCATED ACROSS
CNTRL CA WILL TRACK EWD INTO THE ERN GREAT BASIN/FOUR CORNERS AREA
BY SUNDAY MORNING. A LIGHTNING STRIKE OR TWO IS POSSIBLE WITH THIS
IMPULSE AS WELL BUT COVERAGE IS EXPECTED TO REMAIN LESS THAN 10
PERCENT.

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