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Tropical Depression ISAAC


ZCZC MIATCPAT4 ALL
TTAA00 KNHC DDHHMM CCA
 
BULLETIN
TROPICAL DEPRESSION ISAAC ADVISORY NUMBER  39...CORRECTED
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
400 PM CDT THU AUG 30 2012

CORRECTED RAINFALL STATEMENT
 
...SLOW-MOVING ISAAC WEAKENS TO A DEPRESSION OVER NORTHERN
LOUISIANA...
...FLOODING RAINS CONTINUE ACROSS SOUTHEASTERN LOUISIANA AND
MISSISSIPPI...
 
 
SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...32.7N 92.6W
ABOUT 35 MI...55 KM WNW OF MONROE LOUISIANA
ABOUT 40 MI...60 KM SSE OF EL DORADO ARKANSAS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...NNW OR 335 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.38 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
ALL COASTAL WARNINGS HAVE BEEN DISCONTINUED.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT
 
FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR
PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST
OFFICE. 
 
 
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 400 PM CDT...2100 UTC...THE CENTER OF TROPICAL DEPRESSION ISAAC
WAS LOCATED NEAR LATITUDE 32.7 NORTH...LONGITUDE 92.6 WEST. THE
DEPRESSION IS MOVING TOWARD THE NORTH-NORTHWEST NEAR 12 MPH...19
KM/H. A TURN TOWARD THE NORTH IS EXPECTED BY LATE TONIGHT OR EARLY
FRIDAY. ON THE FORECAST TRACK...THE CENTER OF ISAAC WILL CONTINUE
TO MOVE OVER LOUISIANA TODAY...OVER ARKANSAS ON FRIDAY...AND OVER
SOUTHERN MISSOURI FRIDAY NIGHT.
 
MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH...55 KM/H...WITH HIGHER
GUSTS.  GRADUAL WEAKENING IS FORECAST DURING THE NEXT 48 HOURS...AND
ISAAC IS EXPECTED TO BECOME A POST-TROPICAL REMNANT LOW PRESSURE
SYSTEM BY SATURDAY.
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE BASED ON NEARBY SURFACE
OBSERVATIONS IS 995 MB...29.38 INCHES.
 
 
HAZARDS AFFECTING LAND
----------------------
EVEN THOUGH ISAAC IS NO LONGER A TROPICAL STORM...DANGEROUS
HAZARDS FROM STORM SURGE...INLAND FLOODING...AND TORNADOES ARE
STILL OCCURRING.
 
STORM SURGE...WATER LEVELS WILL REMAIN ELEVATED IN SOUTHEASTERN
LOUISIANA AND COASTAL MISSISSIPPI THROUGH TONIGHT...AND GRADUALLY
SUBSIDE TOMORROW. FOR INFORMATION SPECIFIC TO YOUR AREA...PLEASE
SEE PRODUCTS ISSUED BY YOUR LOCAL WEATHER SERVICE OFFICE.  
 
BASED ON OBSERVATIONS FROM NATIONAL OCEAN SERVICE TIDE GAGES...AT
NEW CANAL STATION LOUISIANA...A STORM SURGE OF MORE THAN 5 FEET IS
PERSISTING ALONG THE SOUTHERN SHORE OF LAKE PONTCHARTRAIN...AND A
STORM SURGE VALUE OF NEAR 4 FEET CONTINUES AT WAVELAND MISSISSIPPI.
 
WIND...TROPICAL-STORM-FORCE WIND GUSTS COULD OCCUR ALONG THE COASTS
OF SOUTHEASTERN LOUISIANA AND MISSISSIPPI THROUGH THIS AFTERNOON.
 
RAINFALL...ISAAC IS EXPECTED TO PRODUCE TOTAL RAINFALL ACCUMULATIONS
OF 7 TO 14 INCHES...WITH POSSIBLE ISOLATED MAXIMUM AMOUNTS OF 25
INCHES...OVER NORTHERN AND EASTERN LOUISIANA....MUCH OF MISSISSIPPI
AND SOUTHWEST ALABAMA.  RAINFALL TOTALS OF 3 TO 6 INCHES WITH
ISOLATED MAXIMUM AMOUNTS OF 8 INCHES POSSIBLE ACROSS ARKANSAS AND
INTO SOUTHERN MISSOURI THROUGH FRIDAY.  THESE RAINS COULD RESULT IN
SIGNIFICANT LOWLAND FLOODING.  THE HEAVY RAIN POTENTIAL WILL BE
SPREADING EASTWARD THIS WEEKEND INTO PORTIONS OF THE MID WEST AND
OHIO VALLEY REGION. 
 
TORNADOES...TORNADOES ARE POSSIBLE ALONG THE CENTRAL GULF COAST
REGION AND PARTS OF THE LOWER MISSISSIPPI RIVER VALLEY THROUGH
TONIGHT.
 
SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL CONTINUE TO
AFFECT THE WEST COAST OF FLORIDA AND THE NORTHERN GULF COAST THROUGH
TONIGHT BEFORE SUBSIDING ON SATURDAY.
 
 
NEXT ADVISORY
-------------
THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE
CENTER ON THIS SYSTEM. FUTURE INFORMATION ON THIS SYSTEM CAN BE
FOUND IN PUBLIC ADVISORIES ISSUED BY THE HYDROMETEOROLOGICAL
PREDICTION CENTER...UNDER AWIPS HEADER TCPAT4 AND WMO HEADER WTNT34
KWNH...BEGINNING AT 10 PM CDT.

 
$$
FORECASTER STEWART/BEVEN

NNNN


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Page last modified: Monday, 31-Dec-2012 12:09:25 UTC