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Ida weakens to a depression as it moves farther inland, TS Kate no threat, new tropical wave likely to develop

Ida weakens to a depression as it moves farther inland, TS Kate no threat, new tropical wave likely to develop

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Hurricane Ida made landfall near Port Fourchon, Louisiana at 11:55 p.m. CDT Sunday, with maximum sustained winds of 130 knots (150 mph) and a minimum pressure of 930 mb. Ida was the second-most intense hurricane to ever hit the state of Louisiana by minimum pressure, with only Hurricane Katrina of 2005 having a lower pressure (920 mb). Since that time, land interaction and increasing wind shear has caused Ida to weaken rapidly, and Ida is now down to tropical depression…

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Invest 90L could develop into a tropical depression before moving inland into Florida

Invest 90L could develop into a tropical depression before moving inland into Florida

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Invest 90L, an area of low pressure that has developed along a decaying frontal boundary, has a medium chance to become the next tropical depression of the 2021 Atlantic hurricane season. After Hurricane Elsa at the start of this month, the Atlantic basin has been quiet, though this is typical for the month of July, which averages about one named storm a year. As of 18:00 UTC Saturday, Invest 90L was centered near 29.0°N 77.4°W. Maximum sustained winds were 30…

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Invest 90L northeast of Bermuda likely to become subtropical storm by Saturday morning, Invest 91L in Gulf running out of time to develop

Invest 90L northeast of Bermuda likely to become subtropical storm by Saturday morning, Invest 91L in Gulf running out of time to develop

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There continues to be two “Invests” – short for Area of Investigation – being monitored by the National Hurricane Center for potential tropical or subtropical development. Invest 90L is located northeast of Bermuda, and Invest 91L is located over the northwestern Gulf of Mexico. Both of the systems have developed well-defined circulation centers, but lack sufficient organized deep convection as of this time. It appears likely that the Atlantic will have at least one subtropical or tropical cyclone develop prior…

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Two pre-season Invests, 90L and 91L, to watch in the Atlantic

Two pre-season Invests, 90L and 91L, to watch in the Atlantic

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After a recent increase in tropical and subtropical activity in the month of May, the National Hurricane Center announced in February its plans to issue routine Tropical Weather Outlooks starting on May 15 in 2021. It appears to have been the right decision. There are now two areas of interest being monitored by the National Hurricane Center for potential development: Invest 90L in the western Atlantic, which has a high chance of development, and Invest 91L in the Gulf of…

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Invest 90L likely to become tropical or subtropical storm near the Bahamas by Saturday night

Invest 90L likely to become tropical or subtropical storm near the Bahamas by Saturday night

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It appears very likely that the Atlantic’s streak of pre-season tropical activity, which began in 2015, will continue for a sixth year. A trough of low pressure – now designated Invest 90L – is likely to organize into 2020’s first tropical or subtropical cyclone, possibly as soon as Friday evening. An Air Force Reserve Hurricane Hunter aircraft has been tentatively scheduled to investigate 90L on Friday afternoon. As of 2:40 p.m. EDT Thursday, the National Hurricane Center (NHC) gave 90L…

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Invest 90L could develop into a brief subtropical or tropical cyclone, 91E less organized

Invest 90L could develop into a brief subtropical or tropical cyclone, 91E less organized

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The Atlantic’s first “Invest” – short for area of investigation – was designated early Sunday morning. Invest 90L is currently producing disorganized shower activity well east of the Bahamas, but a narrow window for potential tropical or subtropical development exists between late Monday and Tuesday. If 90L becomes a tropical or subtropical storm, it will be named Andrea. As of 00:00 UTC Monday, Invest 90L was centered near 26.0°N 66.8°W. Maximum sustained winds were 20 knots (25 mph), with an…

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Invest 90L becoming better organized over the Yucatan Peninsula, expected to develop

Invest 90L becoming better organized over the Yucatan Peninsula, expected to develop

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Invest 90L is likely to develop into a tropical cyclone by Sunday morning, and will likely make landfall somewhere between the western Florida Panhandle and eastern Louisiana. The National Hurricane Center (NHC) now gives 90L a 70 percent chance of development within 48 hours, and a 90 percent chance within five days. Models have come into better agreement from yesterday, and it appears likely that the Atlantic will see a pre-season named storm for the fourth season in a row….

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Invest 90L likely to develop over Gulf of Mexico this weekend – heavy rain remains the primary threat

Invest 90L likely to develop over Gulf of Mexico this weekend – heavy rain remains the primary threat

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Showers and thunderstorms have become slightly better organized with Invest 90L, currently located over the northeastern Yucatan Peninsula. Strong wind shear and land interaction are expected to limit organization for the next couple of days, but some development is likely by Saturday when it emerges into the central or eastern Gulf of Mexico. The National Hurricane Center (NHC) now gives 90L a near zero percent chance of formation within 48 hours, but a 60 percent chance within five days. The…

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Invest 90L may develop over Gulf of Mexico, potential track remains very uncertain

Invest 90L may develop over Gulf of Mexico, potential track remains very uncertain

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On Monday afternoon, the National Hurricane Center (NHC) designated an elongated surface low over the Northwestern Caribbean Invest 90L – the first “Invest” of the 2018 Atlantic hurricane season. The NHC gives 90L a near zero percent chance of development during the next 48 hours, but a 40 percent chance of development within five days. An Invest – short for area of investigation – is an area of disturbed weather being monitored for potential tropical or subtropical development. Invests are…

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90L likely to develop over the Southwestern Caribbean – possible threat to the U.S. Gulf Coast this weekend

90L likely to develop over the Southwestern Caribbean – possible threat to the U.S. Gulf Coast this weekend

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A broad area of low pressure developed over the Southwestern Caribbean Sea on Tuesday, and has been designated Invest 90L by the National Hurricane Center (NHC). The NHC gives 90L a 50 percent chance of development within 48 hours, and a 70 percent chance within five days. An Air Force Hurricane Hunter Aircraft is scheduled to visit 90L on Wednesday afternoon, if necessary. As of 00:00 UTC Wednesday, Invest 90L was centered near 11.4°N 81.2°W. Maximum sustained winds were 25 knots…

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