000 WTNT34 KNHC 250836 TCPAT4 BULLETIN TROPICAL STORM DEBBY ADVISORY NUMBER 8 NWS NATIONAL HURRICANE CENTER MIAMI FL AL042012 400 AM CDT MON JUN 25 2012 ...DEBBY A LITTLE WEAKER WHILE REMAINING NEARLY STATIONARY OVER THE NORTHEAST GULF OF MEXICO... SUMMARY OF 400 AM CDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...28.6N 85.8W ABOUT 90 MI...145 KM SSW OF APALACHICOLA FLORIDA MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...STATIONARY MINIMUM CENTRAL PRESSURE...993 MB...29.32 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED FROM THE MISSISSIPPI-ALABAMA BORDER EASTWARD TO THE ALABAMA-FLORIDA BORDER. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * EAST OF THE ALABAMA-FLORIDA BORDER EASTWARD TO THE SUWANNEE RIVER FLORIDA A TROPICAL STORM WATCH IS IN EFFECT FOR... * SOUTH OF THE SUWANNEE RIVER TO ENGLEWOOD FLORIDA A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE LATER TODAY. 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 400 AM CDT...0900 UTC...THE CENTER OF TROPICAL STORM DEBBY WAS LOCATED NEAR LATITUDE 28.6 NORTH...LONGITUDE 85.8 WEST. DEBBY HAS REMAINED NEARLY STATIONARY OVER THE PAST SEVERAL HOURS. LITTLE MOVEMENT IS EXPECTED DURING THE NEXT COUPLE OF DAYS...BUT THIS FORECAST REMAINS UNCERTAIN DUE TO WEAK STEERING CURRENTS. MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 50 MPH...85 KM/H...WITH HIGHER GUSTS. SOME RESTRENGTHENING IS POSSIBLE DURING THE NEXT 48 HOURS. TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 200 MILES...325 KM...MAINLY NORTH AND EAST OF THE CENTER. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 993 MB...29.32 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS WILL CONTINUE OVER PORTIONS OF THE NORTHEAST GULF COAST THROUGH TODAY. 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 AT THE TIMES OF HIGH TIDE OVER THE NEXT FEW DAYS... APALACHEE BAY TO WACCASASSA BAY...4 TO 6 FT FLORIDA WEST COAST SOUTH OF WACCASASSA BAY...2 TO 4 FT ALABAMA-FLORDA BORDER EASTWARD TO APALACHEE BAY...2 TO 4 FT SOUTHEASTERN LOUISIANA TO ALABAMA-FLORIDA BORDER...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 TOTAL RAIN ACCUMULATIONS OF 10 TO 15 INCHES OVER EASTERN PORTIONS OF THE FLORIDA PANHANDLE AND NORTHERN FLORIDA...WITH ISOLATED MAXIMUM AMOUNTS OF 25 INCHES POSSIBLE. SURROUNDING THIS AREA...TOTAL RAIN ACCUMULATIONS OF 5 TO 10 INCHES ARE EXPECTED OVER CENTRAL FLORIDA AND SOUTHEAST GEORGIA INTO COASTAL SOUTH CAROLINA...WITH ISOLATED MAXIMUM AMOUNTS OF 15 INCHES POSSIBLE. GIVEN THE RECENT HEAVY RAINFALL AND WET SOIL CONDITIONS...THESE ADDITIONAL AMOUNTS WILL EXACERBATE THE FLASH FLOOD THREAT ACROSS PORTIONS OF NORTHERN FLORIDA AND SOUTHERN ALABAMA. TORNADOES...A FEW TORNADOES ARE POSSIBLE TODAY ACROSS THE EASTERN FLORIDA PANHANDLE...AND WESTERN AND CENTRAL PORTIONS OF THE FLORIDA PENINSULA. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...700 AM CDT. NEXT COMPLETE ADVISORY...1000 AM CDT. $$ FORECASTER PASCH