SWODY1
SPC AC 130517
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1217 AM CDT SUN APR 13 2008
VALID 131200Z - 141200Z
..NO TSTM AREAS FORECAST...
..SYNOPSIS...
HIGHLY AMPLIFIED PATTERN WILL PERSIST SUNDAY WITH A POSITIVELY
TILTED UPPER TROUGH ADVANCING SLOWLY THROUGH THE ERN STATES AND A
RIDGE OVER THE ROCKY MOUNTAIN WEST. UPPER TROUGH NOW OVER THE ERN
PACIFIC WILL APPROACH THE PACIFIC NW TOWARD THE END OF THIS PERIOD.
THE SURFACE PATTERN WILL BE CHARACTERIZED BY A COLD FRONT MOVING SWD
THROUGH THE REMAINDER OF THE FL PENINSULA AND A LARGE AREA OF HIGH
PRESSURE OVER THE CNTRL STATES CONTRIBUTING TO OFFSHORE FLOW ALONG
THE GULF.
..S FL...
A FEW SHOWERS WILL BECOME INCREASINGLY PROBABLE ALONG SWD ADVANCING
COLD FRONT AND SEA BREEZES AS THE BOUNDARY LAYER DESTABILIZES. THE
00Z OBSERVED SOUNDINGS OVER THE FL PENINSULA FOR SATURDAY EVENING
SHOWED AN INVERSION PRESENT AROUND 700 MB ALONG WITH WEAK MID LEVEL
LAPSE RATES. FORECAST SOUNDINGS SHOW LITTLE IMPROVEMENT OF THE
THERMODYNAMIC ENVIRONMENT WITH WARM MID LEVEL TEMPERATURES AND MUCH
OF THE CAPE CONFINED TO LAYERS WHERE TEMPERATURES ARE WARMER THAN
-10C. THIS SEEMS REASONABLE GIVEN THAT DEEPER ASCENT AND UPPER JET
MAXIMA MOVING THROUGH THE UPPER TROUGH WILL REMAIN WELL NW OF THE
WARM SECTOR. THE MARGINAL THERMODYNAMIC ENVIRONMENT SUGGESTS ANY
LIGHTNING ACCOMPANYING THE SHOWERS SHOULD REMAIN LESS THAN 10%
COVERAGE INLAND.
.DIAL.. 04/13/2008
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