Tropical Storm Eta Turns Post-Tropical

Eta’s weeks-long path of destruction is no more as the tropical storm has lost its tropical characteristics in the Western Atlantic, turning post-tropical.

This cyclone is not forecast to pose a direct threat to T&T as it moves out into the northern Atlantic Ocean over the next several days.

List of names for the 2020 Atlantic Hurricane Season. The next named tropical cyclone will be called Iota.
List of names for the 2020 Atlantic Hurricane Season. The next named tropical cyclone will be called Iota.

At 5:00 AM AST, the center of Post-Tropical Cyclone Eta was located near latitude 33.3 North, longitude 76.8 West. The post-tropical cyclone is moving toward the east-northeast near 21 mph (33 km/h) and this motion is expected to continue with an increase in forward speed through Saturday. On the forecast track, Eta is expected to gradually pull away from the southeast U.S. coast today.

Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Eta could intensify a little as a non-tropical cyclone during the next day or so before it becomes absorbed by a larger non-tropical cyclone on Saturday or Saturday night.

Tropical-storm-force winds extend outward up to 115 miles (185 km) from the center. The estimated minimum central pressure is 1004 millibars.

Post-Tropical Cyclone Eta Forecast Track as of 5:00 AM AST Friday 13th November 2020. (National Hurricane Center)
Post-Tropical Cyclone Eta Forecast Track as of 5:00 AM AST Friday 13th November 2020. (National Hurricane Center)

Watches & Warnings

Post-Tropical Cyclone Watches and Warnings as of 5:00 AM AST Friday 13th November 2020. (National Hurricane Center)
Post-Tropical Cyclone Watches and Warnings as of 5:00 AM AST Friday 13th November 2020. (National Hurricane Center)

There are no coastal watches or warnings in effect.

Hazards Affecting Land

Post-Tropical Cyclone Eta probabilities for tropical-storm-force winds as of 5:00 AM AST Friday 13th November 2020, as well as the most likely time of arrival of tropical-storm-force winds. (National Hurricane Center)
Post-Tropical Cyclone Eta probabilities for tropical-storm-force winds as of 5:00 AM AST Friday 13th November 2020, as well as the most likely time of arrival of tropical-storm-force winds. (National Hurricane Center)

SURF: Swells generated by Eta will affect portions of the southeastern United States coast today. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local
weather office.

This system is of no direct threat to the Windward Islands, including Trinidad and Tobago.

Post-Tropical Cyclone Eta Forecast Discussion

Post Tropical Cyclone Eta (Weathernerds.org)

While the cyclone is still generating a cluster of strong convection to the northeast of the center, satellite imagery, surface observations and scatterometer data indicate that Eta has merged with a baroclinic zone and become an extratropical cyclone off the southeastern coast of the United States. The scatterometer data showed vectors of 40-50 kt along a front or convergence zone northeast of the center, but these vectors were in the strong convective region and their reliability is uncertain. This, the initial intensity is held at a possibly conservative 40 kt. Eta is forecast to strengthen as a baroclinic low until the system is absorbed by another low-pressure area in about 48 h.

The initial motion is 060/18. The post-tropical cyclone should continue this general motion with an increase in forward speed until it is absorbed. This is the last advisory issued by the National Hurricane Center on Eta.

Forecast discussion by NHC Forecaster Beven.

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