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Category: Active Tropics

Aletta vaults to a Category 4 hurricane, 92E expected to develop

Aletta vaults to a Category 4 hurricane, 92E expected to develop

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Unexpectedly, Hurricane Aletta over the eastern Pacific underwent a remarkable period of rapid intensification overnight, and is now a Category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Although some slight additional intensification cannot be ruled out, Aletta is likely close to its peak intensity and weakening should commence tonight or early tomorrow. Aletta remains no threat to land. To the east of Aletta, Invest 92E has been designated, and is expected to develop into a tropical depression this weekend…

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Aletta becomes a hurricane, Bud likely to follow; Caribbean and Gulf may warrant monitoring next week

Aletta becomes a hurricane, Bud likely to follow; Caribbean and Gulf may warrant monitoring next week

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The eastern Pacific remains very active. Tropical Storm Aletta strengthened into the first hurricane of the 2018 Pacific hurricane season Thursday afternoon, and is likely to strengthen a little more as it moves west-northwestward away from land. To the east of Aletta, a tropical wave is likely to develop into a new Eastern Pacific tropical cyclone by Sunday. The Atlantic basin remains quiet for now, but the GFS, UKMET and CMC models are all indicating that the Northwestern Caribbean and…

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Tropical Storm Aletta forms over the eastern Pacific, disturbance behind also likely to develop

Tropical Storm Aletta forms over the eastern Pacific, disturbance behind also likely to develop

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The first named storm of the 2018 Pacific hurricane season, Tropical Storm Aletta, was named Wednesday morning. Aletta is likely to intensify into a hurricane away from land by the weekend, although the intensity guidance has backed off on intensification a bit. To the east of Aletta is another tropical wave that has a high chance to develop into a tropical cyclone by Sunday. The Atlantic basin remains quiet for the moment, although some models are indicating the possibility of…

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91E close to Tropical Depression status, disturbance behind 91E may also develop

91E close to Tropical Depression status, disturbance behind 91E may also develop

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Invest 91E over the eastern Pacific basin has become much better organized today, and is close to becoming a tropical depression. Satellite imagery indicates that the circulation is becoming better defined, although an ASCAT pass from Tuesday morning was inconclusive as to whether a well defined circulation had formed. The National Hurricane Center (NHC) gives 91E a near 100 percent chance of development within 48 hours. 91E is likely to have advisories initiated by tonight, should become Tropical Storm Aletta…

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91E expected to develop, East Pacific about to get active

91E expected to develop, East Pacific about to get active

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As is typical for June and July, the eastern Pacific basin is about to get active. The basin already has seen one tropical cyclone – Tropical Depression One-E – form this year, but the eastern Pacific should see its first named storm, Aletta, form this week. Invest 91E currently is given by the National Hurricane Center (NHC) a 60 percent chance of development within 48 hours, and a 90 percent chance of development within five days. There is also a…

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Alberto weakens to a Subtropical Depression, tropics expected to be quiet for at least the next week

Alberto weakens to a Subtropical Depression, tropics expected to be quiet for at least the next week

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Subtropical Storm Alberto weakened to a Subtropical Depression on Monday night, and has continued to slowly weaken this morning. The center of Alberto is currently moving through central Alabama, and the heavy rainfall threat continues. Flash Flood Watches remain in effect for portions of Alabama, Georgia, Tennessee, and Kentucky. As of 10:00 a.m. CDT (11:00 a.m. EDT) Tuesday, Subtropical Depression Alberto was centered near 33.8°N 87.2°W, and was moving northward at about 12 mph. Maximum sustained winds were 25 knots…

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Alberto makes landfall near Laguana Beach, Florida

Alberto makes landfall near Laguana Beach, Florida

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Subtropical Storm Alberto made landfall near Laguana Beach, Florida at about 4:00 p.m. CDT (5:00 p.m. EDT) Monday afternoon. At landfall, the storm had maximum sustained winds of 40 knots (45 mph), with an estimated minimum pressure of 994 mb. This was down from Alberto’s peak intensity early Monday, when it packed maximum sustained winds of 55 knots (65 mph) with an estimated minimum pressure of 990 mb. Alberto is the first subtropical cyclone to make landfall in the United…

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Alberto headed for landfall in Western Florida Panhandle

Alberto headed for landfall in Western Florida Panhandle

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Subtropical Storm Alberto has only strengthened slightly since yesterday, and is expected to make landfall in the western Florida Panhandle on Monday afternoon. Due to dry air entrainment and moderate southeasterly wind shear, Alberto has been unable to significantly strengthen, and the storm has not transitioned into a tropical cyclone. Some slight strengthening is possible tonight before landfall if Alberto is able to fight off the dry air, but it appears as if time is running out for significant strengthening….

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SS Alberto slightly better organized as it reforms center in Gulf of Mexico

SS Alberto slightly better organized as it reforms center in Gulf of Mexico

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Subtropical Storm Alberto is slightly better organized today. The original low-level circulation over the Northwestern Caribbean has dissipated and a new, well-defined circulation has developed northwest of Cuba. Alberto is gradually acquiring tropical characteristics, and should transition into a fully tropical storm by late Sunday. Most of the model guidance has shifted slightly east today, and it appears as if Alberto will make landfall somewhere between Mobile, Alabama and Pensacola, Florida sometime on Monday. It appears less likely today that…

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Subtropical Storm Alberto forms over the Northwestern Caribbean Sea

Subtropical Storm Alberto forms over the Northwestern Caribbean Sea

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For the fourth year in a row, a pre-season tropical or subtropical cyclone has formed over the Atlantic basin. At 11:00 a.m. EDT Friday, the National Hurricane Center (NHC) initiated advisories on Subtropical Storm Alberto over the Northwestern Caribbean. Alberto is expected to emerge into the Gulf of Mexico on Saturday, where it will likely find environmental conditions more favorable for strengthening. As of 11:00 a.m. EDT, newly-named Subtropical Storm Alberto was centered near 19.7°N 86.8°W, and was moving north-northeast at…

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