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| #538798 (Received by flhurricane at: 4:51 PM 30.Aug.2012) TCPAT4 BULLETIN TROPICAL DEPRESSION ISAAC ADVISORY NUMBER 39 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092012 400 PM CDT THU AUG 30 2012 ...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 ISOLATED MAXIMUM AMOUNTS OF 25 INCHES POSSIBLE...OVER NORTHERN AND EASTERN LOUISIANA....MUCH OF MISSISSIPPI...SOUTHWESTERN ALABAMA...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 REGIONS. 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 |
