INFORMATIONTropical Storm HELENE ADV LAT LON TIME WIND PR STAT 1 15.60 -53.50 09/15/21Z 30 1011 TROPICAL DEPRESSION 2 15.90 -54.00 09/16/03Z 30 1011 TROPICAL DEPRESSION 2A 16.00 -54.50 09/16/06Z 30 1011 TROPICAL DEPRESSION 3 16.00 -55.10 09/16/09Z 30 1009 TROPICAL DEPRESSION 3A 16.40 -56.50 09/16/12Z 30 1009 TROPICAL DEPRESSION 4 16.10 -57.30 09/16/15Z 30 1009 TROPICAL DEPRESSION 5 16.00 -58.00 09/16/17Z 30 1010 TROPICAL DEPRESSION 6 19.90 -80.70 09/19/23Z 30 1010 TROPICAL DEPRESSION 7 20.10 -81.70 09/20/03Z 30 1010 TROPICAL DEPRESSION 7A 20.70 -82.60 09/20/06Z 30 1010 TROPICAL DEPRESSION 8 21.20 -83.30 09/20/09Z 25 1010 TROPICAL DEPRESSION 8A 21.50 -84.00 09/20/12Z 25 1010 TROPICAL DEPRESSION 9 22.60 -85.20 09/20/15Z 25 1010 TROPICAL DEPRESSION 10 23.90 -86.10 09/20/21Z 25 1008 TROPICAL DEPRESSION 11 24.40 -86.50 09/21/03Z 25 1009 TROPICAL DEPRESSION 12 25.10 -87.10 09/21/09Z 25 1007 TROPICAL DEPRESSION 13 26.60 -87.20 09/21/15Z 45 1006 TROPICAL STORM 13A 27.10 -87.20 09/21/18Z 55 999 TROPICAL STORM 14 27.60 -87.20 09/21/21Z 55 999 TROPICAL STORM 14A 28.30 -87.10 09/22/00Z 55 997 TROPICAL STORM 15 29.10 -87.10 09/22/03Z 55 996 TROPICAL STORM 15A 29.40 -87.10 09/22/06Z 55 1000 TROPICAL STORM 16 30.00 -87.40 09/22/09Z 45 1003 TROPICAL STORM 16A 30.60 -86.70 09/22/12Z 40 1003 TROPICAL STORM 17 30.90 -86.10 09/22/15Z 35 1006 TROPICAL STORM 17A 31.60 -85.40 09/22/18Z 30 1010 TROPICAL DEPRESSION 18 32.30 -84.60 09/22/21Z 25 1010 TROPICAL DEPRESSION WIND is in knots PR is pressure in millibars (mb) or hectopascals (hPa) SUMMARYHelene became a Tropical Storm on the morning of September 21, about 265 miles South of Pensacola, Florida. At 7pm, Helene headed for the Florida Panhandle. Tropical Storm Helene moved inland on September 22 and later weakened to a Tropical Depression. Tropical Storm Helene reached Maximum Sustained Winds of 65 mph and a Minimum Central Pressure of 998 MB on the afternoon of September 21. ********************************************** DETAILS ************************************* 720 WTNT32 KNHC 211445 TCPAT2 BULLETIN TROPICAL STORM HELENE ADVISORY NUMBER 13 NATIONAL WEATHER SERVICE MIAMI FL 10 AM CDT THU SEP 21 2000 ...TROPICAL DEPRESSION TWELVE BECOMES TROPICAL STORM HELENE...TROPICAL STORM WARNINGS ISSUED... AT 10 AM CDT...1500Z...A TROPICAL STORM WARNING IS IN EFFECT FROM THE MOUTH OF THE PEARL RIVER...ON THE LOUISIANA-MISSISSIPPI BORDER...EASTWARD TO THE MOUTH OF THE AUCILLA RIVER FLORIDA. SMALL CRAFT SHOULD REMAIN IN PORT FROM THE MOUTH OF THE PEARL RIVER TO THE MOUTH OF THE MISSISSIPPI RIVER. AT 10 AM CDT...1500Z...THE CENTER OF TROPICAL STORM HELENE WAS LOCATED NEAR LATITUDE 26.6 NORTH...LONGITUDE 87.2 WEST OR ABOUT 265 MILES SOUTH OF PENSACOLA FLORIDA. HELENE IS MOVING TOWARD THE NORTH-NORTHWEST NEAR 13 MPH...AND A TURN TO THE NORTH IS EXPECTED TODAY. THIS MOTION COULD BRING THE CENTER NEAR THE NORTHERN GULF COAST TONIGHT OR FRIDAY MORNING. MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH...WITH HIGHER GUSTS. SOME FURTHER STRENGTHENING IS FORECAST DURING THE NEXT 24 HOURS. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 85 MILES MAINLY TO THE EAST OF THE CENTER. THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT IS 1006 MB...29.71 INCHES. STORM SURGE FLOODING OF 3 TO 5 FT ABOVE NORMAL TIDE LEVELS...WITH HIGHER LEVELS IN BAYS...ACCOMPANIED BY BATTERING WAVES...IS LIKELY NEAR AND TO THE EAST OF WHERE THE CENTER MAKES LANDFALL. RAINFALL AMOUNTS OF 5 TO 8 INCHES...WITH LOCALLY HEAVIER AMOUNTS...ARE LIKELY ALONG THE PATH OF HELENE. REPEATING THE 10 AM CDT POSITION...26.6 N... 87.2 W. MOVEMENT TOWARD...NORTH-NORTHWEST NEAR 13 MPH. MAXIMUM SUSTAINED WINDS... 50 MPH. MINIMUM CENTRAL PRESSURE...1006 MB. FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL WEATHER OFFICE. AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 1 PM CDT FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 4 PM CDT. FORECASTER BEVEN ********************************************** 09-22-2000 ********************************** 282 WTNT32 KNHC 220540 TCPAT2 BULLETIN TROPICAL STORM HELENE INTERMEDIATE ADVISORY NUMBER 15A NATIONAL WEATHER SERVICE MIAMI FL 1 AM CDT FRI SEP 22 2000 ...HELENE IS NOT STRENGTHENING...HEADING TOWARD THE FLORIDA PANHANDLE... A HURRICANE WATCH REMAINS IN EFFECT FROM THE FLORIDA/ALABAMA BORDER TO THE MOUTH OF THE AUCILLA RIVER FLORIDA. A TROPICAL STORM WARNING IS IN EFFECT FROM PASCAGOULA EASTWARD TO THE MOUTH OF THE AUCILLA RIVER. SMALL CRAFT SHOULD REMAIN IN PORT FROM WEST OF PASCAGOULA TO THE MOUTH OF THE MISSISSIPPI RIVER. AT 1 AM CDT...0600Z...THE CENTER OF TROPICAL STORM HELENE WAS LOCATED NEAR LATITUDE 29.4 NORTH...LONGITUDE 87.1 WEST OR ABOUT 75 MILES SOUTH OF PENSACOLA FLORIDA. HELENE IS MOVING TOWARD THE NORTH NEAR 15 MPH ...24 KM/HR...AND A TURN TOWARD THE NORTH-NORTHEAST IS EXPECTED DURING THE NEXT 12 TO 24 HOURS. ON THIS TRACK THE CENTER WILL CROSS THE COAST WITHIN THE TROPICAL STORM WARNING AREA LATER THIS MORNING. DATA FROM A RECONNAISSANCE PLANE AND SATELLITE IMAGES INDICATE THAT HELENE IS NOT STRENGTHENING AND MAXIMUM SUSTAINED WINDS ARE BARELY 65 MPH...100 KM/HR...WITH HIGHER GUSTS IN A FEW SQUALLS EAST OF THE CENTER. NO SIGNIFICANT CHANGE IN STRENGTH IS FORECAST BEFORE THE CENTER REACHES THE COAST...HOWEVER ONLY A SLIGHT INCREASE IN WINDS COULD BRING THE SYSTEM TO HURRICANE STRENGTH. WEAKENING IS LIKELY AFTER LANDFALL. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 85 MILES MAINLY TO THE EAST OF THE CENTER. LATEST MINIMUM CENTRAL PRESSURE REPORTED BY A RECONNAISSANCE PLANE WAS 1000 MB...29.53 INCHES. STORM SURGE FLOODING OF 3 TO 5 FT ABOVE NORMAL TIDE LEVELS...WITH HIGHER LEVELS IN BAYS...ACCOMPANIED BY BATTERING WAVES...IS LIKELY NEAR AND TO THE EAST OF WHERE THE CENTER MAKES LANDFALL. RAINFALL AMOUNTS OF 5 TO 8 INCHES...WITH LOCALLY HEAVIER AMOUNTS... ARE LIKELY ALONG THE PATH OF HELENE. THERE IS A THREAT OF ISOLATED TORNADOES OVER THE WESTERN FLORIDA PANHANDLE TONIGHT AND EARLY FRIDAY. REPEATING THE 1 AM CDT POSITION...29.4 N... 87.1 W. MOVEMENT TOWARD...NORTH NEAR 15 MPH. MAXIMUM SUSTAINED WINDS... 65 MPH. MINIMUM CENTRAL PRESSURE... 1000 MB. FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL WEATHER OFFICE. THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 4 AM CDT. FORECASTER AVILA © 2000 FIU High Performance Database Research Center |