SWODY1
SPC AC 011954
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0154 PM CST MON MAR 01 2010
VALID 012000Z - 021200Z
...NO SVR TSTM AREAS FORECAST...
--- UPDATES ---
OPTIMAL...NEARLY SFC-BASED AIR MASS SHOULD REMAIN OFFSHORE SERN
LA...ALTHOUGH NEAR-SFC STABLE LAYER MAY BECOME VERY SHALLOW WITH
WEAK STATIC STABILITY AFTER ABOUT 21Z AS SFC LOW PASSES NEARBY OR
OVER SHELF WATERS BARELY OFFSHORE. SVR POTENTIAL THEREFORE REMAINS
TOO MRGL/CONDITIONAL FOR CATEGORICAL OUTLOOK. GEN TSTM LINE IS
ADJUSTED PERIPHERALLY...MAINLY TO REPRESENT ONGOING AND NOWCAST
CONVECTIVE TRENDS.
..EDWARDS/ROGERS.. 03/01/2010
.PREV DISCUSSION... /ISSUED 0959 AM CST MON MAR 01 2010/
SATELLITE LOOPS SHOW A SIGNIFICANT UPPER LOW TRACKING EASTWARD
ACROSS TX. THE PRIMARY BAND OF PRECIPITATION IS WELL AHEAD OF THE
UPPER SYSTEM...EXTENDING FROM THE WESTERN GULF NORTHWARD ALONG THE
SABINE RIVER. STRONG SOUTHERLY LOW LEVEL WINDS /JUST ABOVE THE
SURFACE/ WILL SLOWLY TRANSPORT MOISTURE INTO SOUTHERN LA AND HELP TO
PRODUCE MARGINAL ELEVATED INSTABILITY. THE MAJORITY OF MODEL
GUIDANCE THIS MORNING CONTINUES TO SUGGEST THAT A DEVELOPING SURFACE
LOW WILL BARELY GRAZE FAR SOUTHERN LA...PLACING THE SOUTHERN-MOST
PARISHES OF LA IN THE WARM SECTOR OF THE LOW FOR A SHORT PERIOD OF
TIME LATER TODAY. FORECAST SOUNDINGS FOR THIS AREA ARE MARGINALLY
SUFFICIENT FOR SCATTERED THUNDERSTORMS...WITH ENOUGH LOW LEVEL AND
DEEP LAYER VERTICAL SHEAR FOR SUPERCELL STRUCTURES.
THEREFORE...WILL MAINTAIN LOW PROBABILITIES OF WIND AND TORNADOES.
THERMODYNAMIC PARAMETERS APPEAR UNLIKELY TO SUPPORT SEVERE HAIL
TODAY.
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