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Hurricane Frances
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Hurricane Frances
Hurricane Frances was the second most intense tropical cyclone in the Atlantic during 2004 and proved to be very destructive in Florida. It was the sixth named storm, the fourth hurricane, and the third major hurricane of the 2004 Atlantic hurricane season. The system crossed the open Atlantic in late August, moving to the north of the Lesser Antilles while strengthening. Its outer bands struck Puerto Rico and the British Virgin Islands while passing north of the Caribbean Sea. The storm's maximum sustained winds peaked at 145 mph (233 km/h), achieving Category 4 on the Saffir-Simpson Hurricane Scale. As the system's forward motion slowed, the eye passed over San Salvador Island and very close to Cat Island in the Bahamas. Frances was the first hurricane to impact the entire Bahamian archipelago since 1928 and almost completely destroyed their agricultural economy.
Frances then passed over the central sections of Florida, three weeks after Hurricane Charley, causing significant damage to the state's citrus crop, closing major airports and schools, and forcing the cancellation of a collegiate football game. The storm then moved briefly offshore from Florida, into the northeast Gulf of Mexico, and made a second U.S. landfall, on the Florida Panhandle, before accelerating northeast through the eastern United States near the Appalachians and into Atlantic Canada while weakening. A significant tornado outbreak accompanied the storm across the eastern United States, with a total of 103 confirmed tornadoes, making it the third highest number of tornadoes spawned from a tropical cyclone, behind Hurricane Beulah of 1967, which produced 115 tornadoes. Very heavy rains fell in association with this slow-moving and relatively large hurricane, which caused floods in Florida and North Carolina. 50 people died and damages totaled US$10.1 billion (2004 dollars).
A strong tropical wave moved off the west coast of Africa on August 21. Moving under the base of the subtropical ridge, it moved westward for several days, remaining disorganized despite favorable conditions. Thunderstorms associated with the wave finally began organizing on August 24 and the system became a tropical depression early the next day. Good upper-level outflow was observed in all but the eastern quadrants as the depression continued on its path, and it strengthened to tropical storm status on August 25, approximately 1,420 miles (2,290 km) east of the Lesser Antilles.
The tropical storm, now named Frances, further intensified on August 26 in an environment of low vertical wind shear as its track bent to the west-northwest. Frances rapidly intensified, developing an eye and reaching hurricane strength late that afternoon. An approaching upper-level trough caused Frances to move more northwesterly on August 27. The cyclone reached its primary peak intensity of 135 miles per hour (217 km/h) on August 28. The hurricane turned back to its original westward motion on August 29, as the upper trough moved away the region and the subtropical ridge strengthened to Frances's north.
Over the next day, the hurricane underwent an eyewall replacement cycle, during which the maximum sustained winds decreased to 115 miles per hour (185 km/h). This weakening trend was short lived, and the storm reintensified during the afternoon of August 30, as vertical wind shear remained low. The storm continued strengthening as it turned west-northwestward, reaching its peak intensity of 145 miles per hour (233 km/h) on September 2 while 555 miles (893 km) east-southeast of West Palm Beach, Florida. On September 2, Frances entered the Bahamas, passing directly over San Salvador Island and very close to Cat Island. The storm weakened to a Category 3 hurricane by 2 pm, which was initially attributed to inner core processes, but increasing westerly winds aloft, and the resultant vertical wind shear, was later determined to be the cause. On September 3, Frances passed into the vicinity of Abaco Island and directly over Grand Bahama while continuing to slowly weaken. The storm regained Category 2 hurricane intensity prior to passing over Grand Bahama Island and also slowed in forward speed due to a weakness in the subtropical ridge to its north. Parts of South Florida began to be affected by squalls and the outer rainbands of the hurricane at this time. Gusts from 40 miles per hour (64 km/h) to as high as 87 miles per hour (140 km/h) were reported from Jupiter Inlet to Miami.
Frances moved slowly, between 5 and 10 miles per hour (8.0 and 16.1 km/h), as it crossed the warm Gulf Stream between the Bahamas and Florida, leading to the concern that it could restrengthen. However, Frances remained stable at Category 2 intensity with 105 miles per hour (169 km/h) maximum sustained winds while it battered the east coast of Florida between Fort Pierce and West Palm Beach for much of September 4. At 11 pm, the western edge of the eyewall began moving onshore. Because of its large eye, which was roughly 80 miles (130 km) across, and its slow forward motion, the center of circulation remained offshore for several more hours. At 1 am EDT on September 5 (0500 UTC), the center of the broad eye of Frances made landfall along the Florida coast, at the southern end of Hutchinson Island, near Sewall's Point, Jensen Beach, and Port Salerno, Florida. Late on September 5, Frances picked up speed due to a strengthening high pressure system to its north and crossed the Florida Peninsula, emerging over the Gulf of Mexico near Tampa as a tropical storm. After a short trip over the Gulf of Mexico, Frances made a second landfall near St. Marks, Florida. Frances headed inland, weakening to a tropical depression and causing heavy rainfall over the southern and eastern United States. As Tropical Depression Frances turned northeast, United States meteorologists at the Hydrometeorological Prediction Center continued issuing advisories on the system until it crossed the Canada–United States border into Quebec, where heavy rainfall also fell.
A tropical storm watch was issued for Frances for the Leeward Islands during the afternoon of August 29, which was upgraded to a warning that night and expanded to include the islands of Anguilla, Antigua, Barbuda, Nevis, Saba, Saint Kitts, Sint Eustatius, and Sint Maarten. A hurricane watch was issued during the night of August 29 for the northern British Virgin Islands, the northern United States Virgin Islands, Culebra, and Vieques. On the morning of August 30, the hurricane watch for Vieques was downgraded to a tropical storm watch. That afternoon, hurricane watches were changed to tropical storm warnings across Puerto Rico, Culebra, Vieques, British Virgin Islands, and the northern U. S. Virgin Islands while a tropical storm watch was issued for St. Croix while all remaining hurricane watches were dropped. That night, tropical storm watches were issued for eastern portions of the northern coast of the Dominican Republic while a tropical storm warning was issued for Guadeloupe.
Early on the morning of August 31, tropical storm warnings were dropped for Antigua, Barbuda, Nevis, and St. Kitts while hurricane watches were issued for the southeast Bahamas as well as the Turks and Caicos Islands. Hurricane watches were upgraded to hurricane warnings later that morning. Toward noon, tropical storm warnings were issued for the remainder of the northern coast of the Dominican Republic, a hurricane watch was issued for the central Bahamas, while all watches and warnings were dropped for northeast portion of the Dominican Republic and portions of the Lesser Antilles south of the British Virgin Islands. That afternoon, tropical storm warnings were dropped from Puerto Rico eastward. On the morning of September 1, a hurricane watch was issued for the northwest Bahamas while the watch for the central Bahamas was upgraded to a warning. That afternoon, warnings were dropped for the Dominican Republic.
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Hurricane Frances
Hurricane Frances was the second most intense tropical cyclone in the Atlantic during 2004 and proved to be very destructive in Florida. It was the sixth named storm, the fourth hurricane, and the third major hurricane of the 2004 Atlantic hurricane season. The system crossed the open Atlantic in late August, moving to the north of the Lesser Antilles while strengthening. Its outer bands struck Puerto Rico and the British Virgin Islands while passing north of the Caribbean Sea. The storm's maximum sustained winds peaked at 145 mph (233 km/h), achieving Category 4 on the Saffir-Simpson Hurricane Scale. As the system's forward motion slowed, the eye passed over San Salvador Island and very close to Cat Island in the Bahamas. Frances was the first hurricane to impact the entire Bahamian archipelago since 1928 and almost completely destroyed their agricultural economy.
Frances then passed over the central sections of Florida, three weeks after Hurricane Charley, causing significant damage to the state's citrus crop, closing major airports and schools, and forcing the cancellation of a collegiate football game. The storm then moved briefly offshore from Florida, into the northeast Gulf of Mexico, and made a second U.S. landfall, on the Florida Panhandle, before accelerating northeast through the eastern United States near the Appalachians and into Atlantic Canada while weakening. A significant tornado outbreak accompanied the storm across the eastern United States, with a total of 103 confirmed tornadoes, making it the third highest number of tornadoes spawned from a tropical cyclone, behind Hurricane Beulah of 1967, which produced 115 tornadoes. Very heavy rains fell in association with this slow-moving and relatively large hurricane, which caused floods in Florida and North Carolina. 50 people died and damages totaled US$10.1 billion (2004 dollars).
A strong tropical wave moved off the west coast of Africa on August 21. Moving under the base of the subtropical ridge, it moved westward for several days, remaining disorganized despite favorable conditions. Thunderstorms associated with the wave finally began organizing on August 24 and the system became a tropical depression early the next day. Good upper-level outflow was observed in all but the eastern quadrants as the depression continued on its path, and it strengthened to tropical storm status on August 25, approximately 1,420 miles (2,290 km) east of the Lesser Antilles.
The tropical storm, now named Frances, further intensified on August 26 in an environment of low vertical wind shear as its track bent to the west-northwest. Frances rapidly intensified, developing an eye and reaching hurricane strength late that afternoon. An approaching upper-level trough caused Frances to move more northwesterly on August 27. The cyclone reached its primary peak intensity of 135 miles per hour (217 km/h) on August 28. The hurricane turned back to its original westward motion on August 29, as the upper trough moved away the region and the subtropical ridge strengthened to Frances's north.
Over the next day, the hurricane underwent an eyewall replacement cycle, during which the maximum sustained winds decreased to 115 miles per hour (185 km/h). This weakening trend was short lived, and the storm reintensified during the afternoon of August 30, as vertical wind shear remained low. The storm continued strengthening as it turned west-northwestward, reaching its peak intensity of 145 miles per hour (233 km/h) on September 2 while 555 miles (893 km) east-southeast of West Palm Beach, Florida. On September 2, Frances entered the Bahamas, passing directly over San Salvador Island and very close to Cat Island. The storm weakened to a Category 3 hurricane by 2 pm, which was initially attributed to inner core processes, but increasing westerly winds aloft, and the resultant vertical wind shear, was later determined to be the cause. On September 3, Frances passed into the vicinity of Abaco Island and directly over Grand Bahama while continuing to slowly weaken. The storm regained Category 2 hurricane intensity prior to passing over Grand Bahama Island and also slowed in forward speed due to a weakness in the subtropical ridge to its north. Parts of South Florida began to be affected by squalls and the outer rainbands of the hurricane at this time. Gusts from 40 miles per hour (64 km/h) to as high as 87 miles per hour (140 km/h) were reported from Jupiter Inlet to Miami.
Frances moved slowly, between 5 and 10 miles per hour (8.0 and 16.1 km/h), as it crossed the warm Gulf Stream between the Bahamas and Florida, leading to the concern that it could restrengthen. However, Frances remained stable at Category 2 intensity with 105 miles per hour (169 km/h) maximum sustained winds while it battered the east coast of Florida between Fort Pierce and West Palm Beach for much of September 4. At 11 pm, the western edge of the eyewall began moving onshore. Because of its large eye, which was roughly 80 miles (130 km) across, and its slow forward motion, the center of circulation remained offshore for several more hours. At 1 am EDT on September 5 (0500 UTC), the center of the broad eye of Frances made landfall along the Florida coast, at the southern end of Hutchinson Island, near Sewall's Point, Jensen Beach, and Port Salerno, Florida. Late on September 5, Frances picked up speed due to a strengthening high pressure system to its north and crossed the Florida Peninsula, emerging over the Gulf of Mexico near Tampa as a tropical storm. After a short trip over the Gulf of Mexico, Frances made a second landfall near St. Marks, Florida. Frances headed inland, weakening to a tropical depression and causing heavy rainfall over the southern and eastern United States. As Tropical Depression Frances turned northeast, United States meteorologists at the Hydrometeorological Prediction Center continued issuing advisories on the system until it crossed the Canada–United States border into Quebec, where heavy rainfall also fell.
A tropical storm watch was issued for Frances for the Leeward Islands during the afternoon of August 29, which was upgraded to a warning that night and expanded to include the islands of Anguilla, Antigua, Barbuda, Nevis, Saba, Saint Kitts, Sint Eustatius, and Sint Maarten. A hurricane watch was issued during the night of August 29 for the northern British Virgin Islands, the northern United States Virgin Islands, Culebra, and Vieques. On the morning of August 30, the hurricane watch for Vieques was downgraded to a tropical storm watch. That afternoon, hurricane watches were changed to tropical storm warnings across Puerto Rico, Culebra, Vieques, British Virgin Islands, and the northern U. S. Virgin Islands while a tropical storm watch was issued for St. Croix while all remaining hurricane watches were dropped. That night, tropical storm watches were issued for eastern portions of the northern coast of the Dominican Republic while a tropical storm warning was issued for Guadeloupe.
Early on the morning of August 31, tropical storm warnings were dropped for Antigua, Barbuda, Nevis, and St. Kitts while hurricane watches were issued for the southeast Bahamas as well as the Turks and Caicos Islands. Hurricane watches were upgraded to hurricane warnings later that morning. Toward noon, tropical storm warnings were issued for the remainder of the northern coast of the Dominican Republic, a hurricane watch was issued for the central Bahamas, while all watches and warnings were dropped for northeast portion of the Dominican Republic and portions of the Lesser Antilles south of the British Virgin Islands. That afternoon, tropical storm warnings were dropped from Puerto Rico eastward. On the morning of September 1, a hurricane watch was issued for the northwest Bahamas while the watch for the central Bahamas was upgraded to a warning. That afternoon, warnings were dropped for the Dominican Republic.
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