Public Information Statement
Issued by NWS New Orleans/Baton Rouge, LA

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PUBLIC INFORMATION STATEMENT...CORRECTION
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
700 AM CDT WED MAR 19 2014

...THE NATIONAL WEATHER SERVICE (NWS) HAS DECLARED MARCH 16 THROUGH
MARCH 22...2014 AS FLOOD SAFETY AWARENESS WEEK...

YOUR NATIONAL WEATHER SERVICE OFFICE AT NEW ORLEANS/BATON ROUGE
LOUISIANA WILL FEATURE INFORMATION ABOUT A DIFFERENT FLOOD TOPIC
EACH DAY DURING THE AWARENESS WEEK.

TODAY`S TOPIC: FLOODS HAZARDS

A FLOOD IS DEFINED AS ANY HIGH FLOW...OVERFLOW...OR INUNDATION OF
WATER THAT CAUSES OR THREATENS DAMAGE.  FLOODING CAN OCCUR WITH
PROLONGED RAINFALL OVER SEVERAL DAYS...INTENSE RAINFALL OVER A SHORT
PERIOD OF TIME...OR WHEN WATER FROM AN EXISTING SOURCE MOVES TOO
QUICKLY SUCH AS A DAM BREAK. BRIEF DESCRIPTIONS OF THE VARIOUS TYPES
OF FLOODING YOU MAY EXPERIENCE ARE FOUND BELOW.  MORE INFORMATION
ABOUT THESE FLOOD HAZARDS CAN BE FOUND ON THE NWS FLOOD SAFETY
WEBSITE AT WWW.FLOODSAFETY.NOAA.GOV.

FLASH FLOODING: FLASH FLOODING IS A RAPID AND EXTREME FLOW OF HIGH
WATER INTO A NORMALLY DRY AREA...OR A RAPID WATER LEVEL RISE IN A
STREAM OR CREEK ABOVE A PREDETERMINED FLOOD LEVEL...BEGINNING WITHIN
SIX HOURS OF THE CAUSATIVE EVENT...SUCH AS INTENSE RAINFALL...LEVEE
FAILURE OR DAM FAILURE.

RIVER FLOODING: RIVER FLOODING OCCURS WHEN RIVERS RISE AND OVERFLOW
THEIR BANKS...INUNDATING AREAS THAT ARE NORMALLY DRY.

TROPICAL SYSTEMS AND COASTAL FLOODING: AT ANY TIME OF YEAR...A STORM
FROM OVER THE GULF OF MEXICO CAN BRING HEAVY PRECIPITATION TO THE
MISSISSIPPI AND LOUISIANA COASTS. OVER OUR REGION...SUSTAINED EAST
TO SOUTHEAST WINDS CAN ALSO INDUCE COASTAL FLOODING. WHETHER A STORM
IS TROPICAL OR NOT...PROLONGED PERIODS OF HEAVY PRECIPITATION CAN
CAUSE FRESHWATER FLOODING OVER COASTAL AREAS...AS WELL AS FURTHER
INLAND AS THE STORM MOVES ON SHORE. DECAYING TROPICAL CYCLONES CAN
PRESENT A FLOOD THREAT FOR SEVERAL DAYS. IN ADDITION TO THE
FRESHWATER FLOOD THREAT...TROPICAL SYSTEMS CAN BRING THE THREAT OF
STORM SURGE RELATED COASTAL FLOODING.

DAM BREAK AND LEVEE FAILURE: A BREAK OR FAILURE CAN OCCUR WITH
LITTLE TO NO WARNING. MOST OFTEN THEY ARE CAUSED BY WATER
OVERTOPPING THE STRUCTURE...EXCESSIVE SEEPAGE THROUGH THE
SURROUNDING GROUND...OR A STRUCTURAL FAILURE.

UNDERSTANDING THE DIFFERENT FLOOD HAZARDS AND KNOWING THE ACTIONS TO
TAKE BEFORE...DURING...AND AFTERWARDS CAN HELP YOU PROTECT YOUR
LIFE...THE LIVES OF YOUR LOVED ONES...AND YOUR PROPERTY.  PREPARE
NOW BY VISITING WWW.FLOODSAFETY.NOAA.GOV

JOIN US TOMORROW FOR INFORMATION ON FLOOD RELATED SERVICES PROVIDED
BY THE NATIONAL WEATHER SERVICE.

$$








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