000 WTNT34 KNHC 241749 TCPAT4 BULLETIN TROPICAL STORM DEBBY INTERMEDIATE ADVISORY NUMBER 5A NWS NATIONAL HURRICANE CENTER MIAMI FL AL042012 100 PM CDT SUN JUN 24 2012 ...TROPICAL STORM CONDITIONS CONTINUE OVER PORTIONS OF THE NORTHEAST GULF COAST... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...28.3N 85.9W ABOUT 200 MI...325 KM ESE OF THE MOUTH OF THE MISSISSIPPI RIVER ABOUT 105 MI...170 KM SSW OF APALACHICOLA FLORIDA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...993 MB...29.32 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE COAST OF LOUISIANA FROM THE MOUTH OF THE PEARL RIVER WESTWARD TO MORGAN CITY...NOT INCLUDING THE CITY OF NEW ORLEANS OR LAKE PONTCHARTRAIN * THE MISSISSIPPI-ALABAMA BORDER EASTWARD TO THE SUWANNEE RIVER RIVER FLORIDA A TROPICAL STORM WATCH IS IN EFFECT FOR... * SOUTH OF THE SUWANNEE RIVER TO ANCLOTE KEY FLORIDA A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN 12 TO 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 100 PM CDT...1800 UTC...THE CENTER OF TROPICAL STORM DEBBY WAS LOCATED NEAR LATITUDE 28.3 NORTH...LONGITUDE 85.9 WEST. DEBBY IS MOVING TOWARD THE NORTHEAST NEAR 6 MPH...9 KM/H. NO SIGNIFICANT MOTION IS EXPECTED DURING THE NEXT 12 TO 24 HOURS...AND THE TRACK BEYOND THAT TIME IS HIGHLY UNCERTAIN. MAXIMUM SUSTAINED WINDS REMAIN NEAR 60 MPH...95 KM/H...WITH HIGHER GUSTS. SOME SLIGHT STRENGTHENING IS POSSIBLE DURING THE NEXT 48 HOURS. TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 200 MILES...325 KM. THE LATEST MINIMUM CENTRAL PRESSURE MEASURED BY A RECONNAISSANCE AIRCRAFT WAS 993 MB...29.32 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS ARE ALREADY NEAR OR OVER PORTIONS OF THE NORTHEAST GULF COAST AND ARE EXPECTED TO REACH THE REMAINDER OF THE WARNING AREA BY TONIGHT...MAKING OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. STORM SURGE...THE COMBINATION OF A STORM SURGE AND THE TIDE WILL CAUSE NORMALLY DRY AREAS NEAR THE COAST TO BE FLOODED BY RISING WATERS. THE WATER COULD REACH THE FOLLOWING DEPTHS ABOVE GROUND IF THE PEAK SURGE OCCURS AT THE TIME OF HIGH TIDE... SOUTHEASTERN LOUISIANA EASTWARD THROUGH APALACHEE BAY...3 TO 5 FT FLORIDA WEST COAST SOUTH OF APALACHEE BAY...1 TO 3 FT SOUTHWESTERN LOUISIANA...1 TO 3 FT THE DEEPEST WATER WILL OCCUR ALONG THE IMMEDIATE COAST IN AREAS OF ONSHORE FLOW. SURGE-RELATED FLOODING DEPENDS ON THE RELATIVE TIMING OF THE SURGE AND THE TIDAL CYCLE...AND CAN VARY GREATLY OVER SHORT DISTANCES. FOR INFORMATION SPECIFIC TO YOUR AREA...PLEASE SEE PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE. RAINFALL...DEBBY IS EXPECTED TO PRODUCE RAIN ACCUMULATIONS OF 5 TO 10 INCHES ALONG THE IMMEDIATE GULF COAST FROM SOUTHEAST LOUISIANA TO THE CENTRAL WEST COAST OF FLORIDA...WITH ISOLATED MAXIMUM AMOUNTS OF 15 INCHES POSSIBLE. GIVEN THE RECENT HEAVY RAINFALL AND WET SOIL CONDITIONS...THESE ADDITIONAL AMOUNTS WILL EXACERBATE THE THREAT OF FLOODING ACROSS PORTIONS OF NORTHERN FLORIDA AND SOUTHERN ALABAMA. TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER PORTIONS OF THE WEST-CENTRAL AND SOUTHWESTERN FLORIDA PENINSULA TODAY. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...400 PM CDT. $$ FORECASTER AVILA