HAZARDOUS WEATHER OUTLOOK
Issue Date: 626 AM CST TUE DEC 8 2009
Expiration: 630 AM CST WED DEC 09 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS
OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.
.DAY ONE...TODAY AND TONIGHT
...SEVERE THUNDERSTORMS AND FLOODING...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS AND TORNADOES
ACROSS THE ENTIRE OUTLOOK AREA TODAY AND TONIGHT. THE MAIN CONCERN
FROM SEVERE WEATHER WILL BE DAMAGING STRAIGHT LINE WINDS AND
ISOLATED TORNADOES...A FEW OF WHICH COULD BE STRONG.
A FLASH FLOOD WATCH IS IN EFFECT FOR THE ENTIRE OUTLOOK AREA
EXCEPT THE LOWER COASTAL PARISHES TODAY. ADDITIONAL HEAVY RAINFALL
ON SATURATED GROUND WILL RESULT IN LOCALIZED FLOODING OF LOW
LYING...POORLY DRAINED...AND FLOOD PRONE AREAS.
A DEEP SURFACE LOW IS EXPECTED TO MOVE INTO THE MID MISSISSIPPI
VALLEY AND BRING A COLD FRONT THROUGH THE REGION TONIGHT.
AHEAD OF THE COLD FRONT ABUNDANT MOISTURE AND STRONG WINDS WILL BE
IN PLACE. WITH MARGINAL INSTABILITY IN PLACE...A STRONG
DISTURBANCE MOVING THROUGH THE CENTRAL PLAINS SHOULD HELP DEVELOP
THUNDERSTORMS DURING THE DAY WITH A FEW BECOMING STRONG TO SEVERE.
WITH THE AMOUNT OF SHEAR EXPECTED ANY DEEP THUNDERSTORM WILL HAVE
THE CAPABILITY OF PRODUCING BOWING STRUCTURES OR SUPER CELLS. THIS
WILL BRING A RISK OF DAMAGING WINDS AND ISOLATED TORNADOES...A FEW
OF WHICH COULD BE STRONG...EF2 OR HIGHER.
THE SEVERE RISK WILL END TONIGHT AFTER THE PASSAGE OF THE COLD
FRONT.
...MARINE HAZARDS...
SMALL CRAFT ADVISORIES ARE IN EFFECT TODAY AND TONIGHT ACROSS THE
COASTAL WATERS AND TIDAL LAKES. SOUTHEAST TO SOUTH WINDS WILL
INCREASE TO 20 TO 25 KNOTS AND SEAS WILL BUILD AS HIGH AS 7 TO 8
FEET TODAY AHEAD OF AN APPROACHING COLD FRONT.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
...MARINE...
MODERATE TO POSSIBLY STRONG OFFSHORE WINDS WILL PREVAIL BEHIND THE
COLD FRONT ON WEDNESDAY...AND A SMALL CRAFT ADVISORY MAY BE
REQUIRED FOR A PORTION OF THE COASTAL WATERS WEDNESDAY MORNING.
STRONG WINDS AND HIGH SEAS WILL DEVELOP AGAIN WEDNESDAY NIGHT AND
PERSIST THROUGH EARLY SATURDAY MORNING.
...THUNDERSTORMS...
THERE IS A CHANCE OF THUNDERSTORMS WITH THE NEXT WEATHER SYSTEM
FRIDAY AND FRIDAY NIGHT. SEVERE THUNDERSTORMS ARE NOT EXPECTED AT
THIS TIME...HOWEVER...THERE IS A CHANCE FOR LOCALLY HEAVY
RAINFALL.
.SPOTTER INFORMATION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER AND
FLOODING OPERATIONS...IS REQUESTED TODAY AND POSSIBLY TONIGHT.
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