Wednesday, May 11, 2011

Mississippi River Flood Warnings/Updates - Hydrologic Outlooks via Weather.gov




Flood Warning

NATIONAL WEATHER SERVICE NEW ORLEANS BATON ROUGE LA
101 PM CDT MON MAY 16 2011

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN
LOUISIANA...

THE ATCHAFALAYA RIVER ABOVE BUTTE LA ROSE AFFECTING ST. MARTIN AND ST.MARY PARISHES

THE ATCHAFALAYA RIVER AT MYETTE POINT AFFECTING ST. MARY PARISH

THE INTRACOASTAL WATERWAY AT BAYOU SORREL LOCK AFFECTING IBERVILLE PARISH

THE ATCHAFALAYA RIVER AT MORGAN CITY AFFECTING ST. MARY PARISH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FORECAST CRESTS ARE BASED UPON RAINFALL THAT HAS OCCURRED ALONG WITH ANTICIPATED RAIN FOR THE NEXT 12 HOURS. ADJUSTMENTS TO THE FORECASTS WILL BE MADE IF ADDITIONAL HEAVY RAINFALL OCCURS.

DO NOT DRIVE CARS THROUGH FLOODED AREAS. REMEMBER...TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES INCLUDING PICKUPS. TURN AROUND AND DON`T DROWN.

A FOLLOWUP PRODUCT WILL BE ISSUED LATER. STAY TUNED TO NOAA WEATHER RADIO...LOCAL TV AND RADIO STATIONS...OR YOUR CABLE PROVIDER...FOR THE LATEST INFORMATION. THE LATEST GRAPHICAL HYDROLOGIC INFORMATION CAN ALSO BE FOUND AT WEATHER.GOV.






HYDROLOGIC OUTLOOK

HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
530 PM CDT TUE MAY 10 2011

...CONTINGENCY FORECASTS FOR MISSISSIPPI AND ATCHAFALAYA RIVERS...
...UPDATED CONTINGENCY FORECAST STAGE FOR BUTTE LA ROSE...

SIGNIFICANT RAINFALL ACROSS THE MIDDLE MISSISSIPPI AND OHIO RIVERVALLEYS OVER THE PAST MONTH HAS LED TO HISTORIC...AND IN SOME CASES RECORD BREAKING...RISES ON BOTH RIVERS. AS THIS WATER MOVESDOWNRIVER...SIGNIFICANT RISES WILL OCCUR ALONG THE MISSISSIPPI AND ATCHAFALAYA RIVERS THROUGH SOUTHEAST AND SOUTH CENTRAL LOUISIANA.

MISSISSIPPI RIVER. OFFICIALS WILL GRADUALLY INCREASE THE NUMBER OF BAYS OPEN ON THE SPILLWAY OVER THE NEXT SEVERAL DAYS. THE OFFICIAL FORECASTS FOR THE ATCHAFALAYA BASIN NOW REFLECT THE PROJECTED OPENING OF MORGANZA AT 20 PERCENT CAPACITY.

HOWEVER...IF THE OPENING OF MORE GATES IS REQUIRED...FORECASTS
CRESTS WILL BE ADJUSTED ACCORDINGLY.

THE FOLLOWING TABLE LISTS THE OFFICIAL FORECAST FOR THE
ATCHAFALAYA RIVER. DUE TO SOME ADJUSTMENTS IN THE STREAMFLOWS ON THE RED RIVER...THE FORECAST CRESTS FOR UPPER PORTIONS OF THE ATCHAFALAYA RIVER (ABOVE BUTTE LA ROSE) HAVE BEEN LOWERED SLIGHTLY.

IT SHOULD BE NOTED THAT WHILE THE OFFICIAL FLOOD STAGES ARE
LISTED BELOW...MOST POPULATION CENTERS ARE PROTECTED BY FLOOD CONTROL LEVEES TO MUCH HIGHER LEVELS.

IN ADDITION IT SHOULD ALSO BE NOTED THAT SOME LOCATIONS MAY
EXPERIENCE FLOODING BEFORE FLOOD STAGE IS REACHED. IF YOU ARE A PROPERTY OWNER ON THE UNPROTECTED SIDE OF THE LEVEE...PLEASE LOOK AT THE FORECAST AND DETERMINE IF YOUR PROPERTY IS AT RISK OF FLOODING.

FORECAST POINT FLOOD OFFICIAL
STAGE FORECAST

SIMMESPORT 47.0 45.5
MELVILLE 41.0 36.0
KROTZ SPRINGS 37.0 32.0
BUTTE LA ROSE 25.0 27.0
BAYOU SORREL LOCK 12.0 18.0
MYETTE POINT 15.0 17.0
MORGAN CITY 4.0 11.0

All Warnings and Hydrologic Updates: Water.weather.gov

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