HYDROLOGIC OUTLOOK
Warning Issue Date: 446 AM CST MON NOV 30 2009
LOCALLY HEAVY RAINFALL POSSIBLE ACROSS SOUTHEAST LOUISIANA AND
SOUTHERN MISSISSIPPI THIS WEEK...
A MOIST TROPICAL AIR MASS WILL MOVE INTO THE REGION AS A SURFACE
LOW DEVELOPS IN THE WESTERN GULF OF MEXICO. SHOWERS AND A FEW
THUNDERSTORMS ALONG THE COAST ARE EXPECTED TO MOVE INTO THE AREA
AS THIS LOW PRESSURE SYSTEM TRACKS ACROSS SOUTHEASTERN LOUISIANA.
THE HEAVIEST RAIN CAN BE EXPECTED TUESDAY EVENING THROUGH
WEDNESDAY MORNING. DUE TO THE HIGH MOISTURE CONTENT OF THE
ATMOSPHERE...RAIN PRODUCTION FROM THESE SHOWERS AND THUNDERSTORMS
WILL BE VERY EFFICIENT.
AREA AVERAGE RAINFALL TOTALS FOR THE TUESDAY THROUGH WEDNESDAY PERIOD
ARE GENERALLY EXPECTED TO BE IN THE 4 TO 6 INCH RANGE. HOWEVER...
LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE.
WATER LEVELS IN AREA RIVERS ARE CURRENTLY LOW...AND NO RIVER
FLOODING IS EXPECTED AS A RESULT OF THIS RAINFALL. HOWEVER...
ELEVATED FLOWS MAY BE EXPERIENCED ON SOME OF THE FASTER RESPONDING
STREAMS AND RIVERS.
ADDITIONALLY...SOME OF THESE STORMS WILL BE CAPABLE OF PRODUCING
VERY HIGH RAINFALL RATES...UPWARDS OF TWO INCHES PER HOUR.
WIDESPREAD FLASH FLOODING IS NOT EXPECTED. HOWEVER...LOCALIZED
EFFECTS WILL LIKELY ACCOMPANY THE HEAVIEST STORMS. THIS WILL
INCLUDE PONDING OF WATER ON ROADWAYS AND IN AREAS OF POOR
DRAINAGE.
PEOPLE IN THE AFFECTED AREAS SHOULD BE AWARE OF THE FLOODING
POTENTIAL...AND MONITOR THE LATEST INFORMATION FOR ANY
STATEMENTS...WATCHES OR WARNINGS THAT MAY BE ISSUED.
$$
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