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Tropical Depression Still Sits Off Louisiana Coast
Written by  // Friday, 02 September 2011 09:32 //

According to the National Hurricane Center’s latest advisory as of 10am CST, the center of tropical depression thirteen is still nearly stationary South of the Louisiana Coast with rainbands moving across much of southeastern Louisiana.
 

Below are excerpts from the 11am advisory:

 

...DEPRESSION NEARLY STATIONARY SOUTH OF THE LOUISIANA COAST...
RAINBANDS MOVING ACROSS MUCH OF SOUTHEASTERN LOUISIANA...


SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...27.3N 91.5W
ABOUT 190 MI...310 KM SW OF THE MOUTH OF THE MISSISSIPPI RIVER
ABOUT 230 MI...370 KM SE OF PORT ARTHUR TEXAS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...NW OR 325 DEGREES AT 2 MPH...4 KM/H
MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...

NONE

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* PASCAGOULA MISSISSIPPI WESTWARD TO SABINE PASS TEXAS...INCLUDING
THE CITY OF NEW ORLEANS...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE
NEXT 24 HOURS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA ...INCLUDING POSSIBLE
INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY
YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 1000 AM CDT...1500 UTC...THE CENTER OF TROPICAL DEPRESSION
THIRTEEN WAS LOCATED NEAR LATITUDE 27.3 NORTH...LONGITUDE 91.5 WEST.
THE DEPRESSION IS DRIFTING TOWARD THE NORTHWEST NEAR 2 MPH...4 KM/H.
A CONTINUED SLOW AND POSSIBLY ERRATIC MOTION TOWARD THE NORTHWEST
OR NORTH IS EXPECTED TODAY AND SATURDAY. ON THE FORECAST TRACK...
THE CENTER OF THE CYCLONE IS EXPECTED TO APPROACH THE COAST OF
SOUTHERN LOUISIANA DURING THE WEEKEND.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH...55 KM/H...WITH HIGHER
GUSTS. GRADUAL STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS
AND THE DEPRESSION COULD BECOME A TROPICAL STORM LATER TODAY. WINDS
OF TROPICAL STORM FORCE ARE BEING REPORTED ON OIL RIGS NORTH AND
EAST OF THE CENTER AT ELEVATIONS OF A FEW HUNDRED FEET.

THE ESTIMATED MINIMUM CENTRAL PRESSURE BASED ON REPORTS FROM NEARBY
OIL RIGS AND AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT IS 1005
MB...29.68 INCHES.


HAZARDS AFFECTING LAND
----------------------
RAINFALL...THE DEPRESSION IS EXPECTED TO PRODUCE TOTAL RAIN
ACCUMULATIONS OF 10 TO 15 INCHES OVER SOUTHERN LOUISIANA...SOUTHERN
MISSISSIPPI...AND SOUTHERN ALABAMA THROUGH SUNDAY...WITH POSSIBLE
ISOLATED MAXIMUM AMOUNTS OF 20 INCHES. THESE RAINS ARE EXPECTED TO
CAUSE EXTENSIVE FLOODING.

STORM SURGE...A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 2
TO 4 FEET ABOVE GROUND LEVEL ALONG THE NORTHERN GULF COAST IN AREAS
OF ONSHORE FLOW.

WIND...TROPICAL STORM CONDITIONS ARE EXPECTED TO FIRST REACH THE
COAST WITHIN THE WARNING AREA THIS EVENING...MAKING OUTSIDE
PREPARATIONS DIFFICULT OR DANGEROUS.

TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER PORTIONS OF
SOUTHERN LOUISIANA TONIGHT.

Below are excerpts from the 7am advisory:

 

LOCATION...27.0N 91.6W

ABOUT 210 MI...340 KM SW OF THE MOUTH OF THE MISSISSIPPI RIVER

ABOUT 250 MI...405 KM SE OF PORT ARTHUR TEXAS

MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H

PRESENT MOVEMENT...N OR 360 DEGREES AT 1 MPH...2 KM/H

MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES

 

 

WATCHES AND WARNINGS

--------------------

CHANGES WITH THIS ADVISORY...

 

NONE

 

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

 

A TROPICAL STORM WARNING IS IN EFFECT FOR...

* PASCAGOULA MISSISSIPPI WESTWARD TO SABINE PASS TEXAS...INCLUDING

THE CITY OF NEW ORLEANS...LAKE PONTCHARTRAIN...AND LAKE MAUREPAS

 

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE

EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE

NEXT 24 HOURS.

 

FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED

STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE

MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE

FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE

THE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL

METEOROLOGICAL SERVICE.

 

 

DISCUSSION AND 48-HOUR OUTLOOK

------------------------------

AT 700 AM CDT...1200 UTC...THE CENTER OF TROPICAL DEPRESSION

THIRTEEN WAS LOCATED NEAR LATITUDE 27.0 NORTH...LONGITUDE 91.6 WEST.

THE DEPRESSION IS DRIFTING VERY SLOWLY TOWARD THE NORTH NEAR 1

MPH...2 KM/H. A CONTINUED SLOW AND POSSIBLY ERRATIC MOTION TOWARD

THE NORTHWEST OR NORTH IS EXPECTED TODAY AND SATURDAY. ON THE

FORECAST TRACK...THE CENTER OF THE CYCLONE IS EXPECTED TO APPROACH

THE COAST OF SOUTHERN LOUISIANA DURING THE WEEKEND.

 

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH...55 KM/H...WITH HIGHER

GUSTS.  GRADUAL STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS

AND THE DEPRESSION COULD BECOME A TROPICAL STORM LATER TODAY.  WINDS

OF TROPICAL-STORM FORCE ARE BEING REPORTED ON OIL RIGS NORTH AND

EAST OF THE CENTER AT ELEVATIONS OF A FEW HUNDRED FEET.

 

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1005 MB...29.68 INCHES.

 

 

HAZARDS AFFECTING LAND

----------------------

RAINFALL...THE DEPRESSION IS EXPECTED TO PRODUCE TOTAL RAIN

ACCUMULATIONS OF 10 TO 15 INCHES OVER SOUTHERN LOUISIANA...SOUTHERN

MISSISSIPPI...AND SOUTHERN ALABAMA THROUGH SUNDAY...WITH POSSIBLE

ISOLATED MAXIMUM AMOUNTS OF 20 INCHES.

 

STORM SURGE...A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 2

TO 4 FEET ABOVE GROUND LEVEL ALONG THE NORTHERN GULF COAST IN AREAS

OF ONSHORE FLOW.

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