Tuesday, April 15, 2008

Lower Mississippi: flood stage comparable to 1973

From the National Weather Service:

928 PM CDT MON APR 14 2008

THE FLOOD WARNING CONTINUES FOR THE MISSISSIPPI RIVER AT NATCHEZ
* UNTIL FURTHER NOTICE.
* AT 8:00 PM MONDAY THE STAGE WAS 55.6 FEET.
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FLOOD STAGE IS 48 FEET.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 56.5 FEET BY SUNDAY MORNING.
* IMPACT...AT 56 FEET...SOUTH OF NATCHEZ, BOURKE ROAD IS UNDERWATER. RESIDENTS WILL HAVE TO BOAT INTO THEIR HOMES.ALL HOMES IN THE TOWNSHIP OF FT. ADAMS ARE FLOODED.
* FLOOD HISTORY...THIS CREST COMPARES TO A PREVIOUS CREST OF 56.6 FEET ON MAY 13 1973.


edit: The NWS has raised the predicted flood crest to 57 feet. That's higher than 1973. Still less than 1927, the year that inspired Randy Newman's song Louisiana 1927. (It also inspired the Army Corps of Engineers to build the Bonnet Carre spillway, to let water out of the Mississippi before it flooded New Orleans.) /edit

The Old River Control Structure was nearly wrecked by the 1973 flood.

Meanwhile, the Bonnet Carre spillway, which lets water from the Mississippi into Lake Pontchartrain, has been partially opened, to keep the Mississippi near New Orleans from rising higher.

2 comments:

ScienceWoman said...

Thanks for the update. Are you following this in your class? I'm planning to use it as a teaching example in tomorrow's lecture.

Kim said...

I'm not actually teaching an intro class this semester - just the lab. (And I'm not teaching my interdisciplinary Control of Nature class, either.) But I've taught Control of Nature so many times that I end up watching the Mississippi reflexively.

(Even if the mud would be vastly improved by a few million years at 500 degrees C and 4 kilobars.)