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July 23, 2008

Filed under: Retired Hurricanes — admin @ 6:31 am

 

Hurricane  The massive and powerful Wilma formed from a broad area of disturbed weather that stretched across much of the Caribbean Sea during the second week of October. A surface low pressure system gradually became defined near Jamaica on October 14, leading to the formation of a tropical depression on October 15 about 220 miles east-southeast of Grand Cayman. The cyclone moved erratically westward and southward for two days while slowly strengthening into a tropical storm. Wilma became a hurricane and began a west-northwestward motion on October 18. Later that day, Wilma began to explosively deepen. The aircraft-measured minimum central pressure reached 882 mb near 0800 UTC October 19. This pressure was accompanied by a 2-4 mile wide eye. Wilma’s maximum intensity is estimated to have been 185 mph a few hours after the 882 mb pressure. On October 20, Wilma weakened slightly and turned northwestward toward the northeastern Yucatan Peninsula. Late on October 21, the slow-moving hurricane made landfall over Cozumel, followed by landfall early the next day over the northeastern Yucatan Peninsula – both at Category 4 intensity. Wilma moved slowly and weakened over northeastern Yucatan, emerging over the Gulf of Mexico early on October 23 as a Category 2 hurricane. Later that day it accelerated northeastward toward southern Florida. The hurricane strengthened over the Gulf waters, and its center made landfall near Cape Romano around 1030 UTC October 24 as a Category 3 hurricane. The eye crossed the Florida Peninsula in less than five hours, moving into the Atlantic just north of Palm Beach as a Category 2 hurricane. Wilma briefly re-intensified just east of Florida, then weakened thereafter. The hurricane moved rapidly northeastward over the western Atlantic and became extratropical about 230 miles southeast of Halifax, Nova Scotia late on October 25. The remnants of Wilma were absorbed by another low late the next day.

your browser does not support the video tagWilma brought hurricane conditions to the northeastern Yucatan Peninsula and the adjacent islands, as well as to southern Florida. In Mexico, Cancun reported 10-minute average winds of 100 mph with a gust to 130 mph at 0000 UTC October 22, while Cozumel reported a pressure of 928.0 mb late on October 21. The Isla Mujeres reported 62.05 inches of rain during the hurricane’s passage. In Florida, a South Florida Water Management District (SFWMD) station in Lake Okeechobee reported 15-minute average winds of 92 mph with a gust to 112 mph at 1500 UTC October 24, while a nearby SFWMD station in Belle Glade reported a gust to 117 mph. Ten tornadoes occurred in Florida due to Wilma.

Twenty-two deaths have been directly attributed to Wilma: 12 in Haiti, 1 in Jamaica, 4 in Mexico, and 5 in Florida. The hurricane caused severe damage in northeastern Yucatan, including Cancun and Cozumel, and widespread damage estimated at $16.8 billion in southern Florida. Wilma also produced major floods in western Cuba.

The 882 mb pressure reported in Wilma is the lowest central pressure on record in an Atlantic hurricane, breaking the old record of 888 mb set by Hurricane Gilbert in September 1988. The central pressure fell 88 mb in 12 hours, which shatters the record of 48 mb in 12 hours held by Hurricane Allen in August 1980.

 

Filed under: Retired Hurricanes — admin @ 6:21 am

 

Rita, the third Category 5 hurricane of the season, was a destructive and deadly hurricane that devastated portions of southeastern Texas and southwestern Louisiana and significantly impacted the Florida Keys.

Hurricane  A tropical wave and the remnants of an old front combined to produce and area of disturbed weather on 16 September. This system became a depression just east of the Turks and Caicos Islands late on 17 September, which moved westward and became a tropical storm the following afternoon. Maximum winds increased to 70 mph as Rita moved through the central Bahamas on September 19. While the storm did not strengthen during the following night, rapid intensification began on September 20 as it moved through the Straits of Florida. Rita became a hurricane that day and reached Category 2 intensity as the center passed about 50 miles south of Key West, Florida.

After entering the Gulf of Mexico, Rita intensified from Category 2 to Category 5 in about 24 hours. The maximum sustained winds reached 165 mph late on September 21, and the hurricane reached a peak intensity of 180 mph early on September 22. Weakening began later that day and continued until landfall around 0740 UTC 24 September just east of the Texas/Louisiana border between Sabine Pass and Johnson’s Bayou. At that time, maximum sustained winds were 115 mph (Category 3). Weakening continued after landfall, but Rita remained a tropical storm until reaching northwestern Louisiana late on 24 September. The cyclone then turned northeastward and merged with a frontal system two days later. Rita brought hurricane conditions to southwestern Louisiana and southeastern Texas. A FCMP instrumented tower at Port Arthur reported 1-min average winds of 94 mph at 0826 UTC September 24 along with a gust of 116 mph. The C-MAN station at Sea Rim State Park, Texas reported 2-minute average winds of 82 mph at 0700 UTC September 24, along with a peak gust of 99 mph. The hurricane caused storm-surge flooding of 10 to 15 ft above normal tide levels along the southwestern coast of Louisiana, caused a notable surge on the inland Lake Livingston, Texas, and inundated portions of the New Orleans area previously flooded by Katrina. Tropical storm conditions occurred in the Florida Keys, where the C-MAN station at Sand Key reported 10-minute average winds of 72 mph at 2110 UTC September 20 with a gust to 92 mph. The station failed shortly thereafter. Storm surge flooding of up to 5 feet above normal tide levels occurred in the Keys.

Rita produced rainfalls of 5 to 9 inches over large portions of Louisiana, Mississippi, and eastern Texas, with isolated amounts of 10 to 15 inches. The cyclone spawned an estimated 90 tornadoes over the southern United States.

Devastating storm surge flooding and wind damage in occurred southwestern Louisiana and extreme southeastern Texas, with some surge damage occurring in the Florida Keys. Rita was responsible for seven deaths, and it caused damage estimated at $10 billion in the United States.

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