HYDROLOGIC OUTLOOK
Warning Issue Date: 258 PM CST THU DEC 10 2009
LOCALLY HEAVY RAIN EXPECTED TO AFFECT SOUTHEAST LOUISIANA AND
SOUTHERN MISSISSIPPI FRIDAY NIGHT AND SATURDAY...
A SLOW MOVING SURFACE LOW IS EXPECTED TO MOVE ACROSS SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI OVER THE WEEKEND. AS THE LOW
MOVES TOWARD THE AREA...A STATIONARY FRONT OVER THE NORTHERN GULF
OF MEXICO WILL MOVE NORTHWARD AS A WARM FRONT...BRINGING AMPLE
GULF MOISTURE INTO THE AREA. WIDESPREAD SHOWERS AND ISOLATED
THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE REGION FRIDAY AND
CONTINUE TO AFFECT THE AREA THROUGH SATURDAY. A FEW OF THE HEAVIER
STORMS WILL BE CAPABLE OF PRODUCING RAINFALL RATES OF OVER ONE
INCH PER HOUR.
AVERAGE RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED FOR THE
FRIDAY NIGHT AND SATURDAY TIME PERIOD...WITH SOME LOCAL AMOUNTS OF 3
TO 5 INCHES POSSIBLE. COLD AND SATURATED GROUND CONDITIONS DUE TO
HEAVY RAINFALL EARLIER THIS WEEK WILL LEAD TO EXCESSIVE RUNOFF AND
THE POSSIBILITY OF FLASH FLOODING. LOCALIZED EFFECTS WILL LIKELY
ACCOMPANY THE HEAVIEST STORMS...INCLUDING PONDING OF WATER ON LOW
LYING ROADWAYS AND IN AREAS OF POOR DRAINAGE.
SEVERAL AREA RIVERS REMAIN NEAR OR JUST ABOVE FLOOD STAGE.
ADDITIONAL RAINFALL AND WATER RUNOFF WILL LEAD TO CONTINUED
ELEVATED STREAM FLOWS AND COULD ALSO RESULT IN ADDITIONAL RIVER
FLOODING.
PEOPLE IN THE AFFECTED AREAS SHOULD BE AWARE OF THE FLOODING
POTENTIAL...AND MONITOR THE LATEST INFORMATION FOR UPDATES. A
FLASH FLOOD WATCH MAY BE NECESSARY ACROSS PORTIONS OF SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.
$$
95/DM
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