COASTAL FLOOD ADVISORY
Warning Issue Date: 502 AM CST MON NOV 30 2009
...COASTAL FLOOD ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
6 AM CST WEDNESDAY...
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A COASTAL
FLOOD ADVISORY...WHICH IS IN EFFECT FROM 3 PM THIS AFTERNOON TO
6 AM CST WEDNESDAY. THE COASTAL FLOOD WATCH IS NO LONGER IN
EFFECT.
AN AREA OF LOW PRESSURE IN THE NORTHWEST GULF OF MEXICO WILL
MOVE ACROSS THE CENTRAL GULF COAST REGION LATE TODAY THROUGH
EARLY WEDNESDAY MORNING. MODERATE TO STRONG NORTHEAST WINDS
EARLY THIS MORNING WILL BECOMING EAST TO SOUTHEAST AND CONTINUE
TO INCREASE THIS AFTERNOON...THEN REMAIN STRONG OUT OF THE
SOUTH AND SOUTHEAST TONIGHT. THE COMBINATION OF WIND DRIVEN TIDES
AND HIGH ASTRONOMICAL TIDES ARE EXPECTED TO CAUSE A RAPID RISE IN
WATER LEVELS TO AROUND 2 FEET ABOVE NORMAL THIS AFTERNOON AND
EVENING.
MINOR COASTAL FLOODING IS LIKELY TO DEVELOP AROUND THE TIME OF
HIGH TIDE OUTSIDE OF HURRICANE PROTECTION LEVEES NEAR THE
COAST...AND POSSIBLY ALONG THE NORTH SHORE OF LAKE PONTCHARTRAIN.
HIGH TIDES OCCUR EARLY THIS EVENING AROUND ATCHAFALAYA BAY...AND
DURING THE LATER EVENING HOURS TO JUST AFTER MIDNIGHT ACROSS THE
REMAINDER OF THE COASTLINE AND ACROSS LAKE PONTCHARTRAIN. FALLING
ASTRONOMICAL TIDES AND THEN MORE WESTERLY SURFACE WINDS WILL CAUSE
WATER LEVELS TO DROP BELOW FLOOD LEVELS BETWEEN 3 AND 6 AM
TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A COASTAL FLOOD ADVISORY INDICATES THAT ONSHORE WINDS AND TIDES
WILL COMBINE TO GENERATE FLOODING OF LOW AREAS ALONG THE SHORE.
$$
22/TD
FLASH FLOOD WATCH
Warning Issue Date: 452 AM CST MON NOV 30 2009
...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
WEDNESDAY MORNING...
THE FLASH FLOOD WATCH CONTINUES FOR
* PORTIONS OF SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI...
INCLUDING THE FOLLOWING AREAS...IN SOUTHEAST LOUISIANA...LOWER
JEFFERSON...LOWER LAFOURCHE...LOWER PLAQUEMINES...LOWER ST.
BERNARD...LOWER TERREBONNE...ORLEANS...ST. CHARLES...UPPER
JEFFERSON...UPPER LAFOURCHE...UPPER PLAQUEMINES...UPPER ST.
BERNARD AND UPPER TERREBONNE. IN SOUTHERN MISSISSIPPI...
HANCOCK...HARRISON AND JACKSON.
* FROM THIS EVENING THROUGH WEDNESDAY MORNING
* A LOW PRESSURE SYSTEM DEVELOPING ALONG A STALLED FRONT IN THE
WESTERN GULF OF MEXICO WILL MOVE INTO SOUTHEAST LOUISIANA AND
SOUTHERN MISSISSIPPI TONIGHT. WIDESPREAD AND STEADY MODERATE TO
OCCASIONALLY HEAVY RAINFALL IS EXPECTED WITH THE PASSAGE OF THIS
SYSTEM THROUGH WEDNESDAY MORNING.
* RAINFALL ACCUMULATIONS GENERALLY BETWEEN 2 TO 4 INCHES IS
EXPECTED ACROSS THE WATCH AREA FROM THIS EVENING THROUGH
WEDNESDAY MORNING. A BAND OF HIGHER AMOUNTS BETWEEN 4 AND 6
INCHES MAY DEVELOP MAINLY OVER THE MISSISSIPPI COASTAL COUNTIES
AND LOWER SOUTHEAST LOUISIANA BY WEDNESDAY MORNING. RUN OFF WILL
CAUSE AREA RIVERS AND STREAMS TO SWELL TO HIGHER LEVELS AND
POSSIBLY CAUSE A FEW TO FLOOD INTO THE MIDDLE OF THE WEEK. IN
ADDITION...ANTICIPATED STRONG ONSHORE FLOW TONIGHT MAY COMPOUND
RIVER RISES DUE TO TIDAL AFFECTS UNTIL WINDS SHIFT TO AN
OFFSHORE DIRECTION.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.
$$
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