Invest 99L
Tuesday, November 21, 2023

Current Snapshot

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By PDC’s Senior Weather
Specialist Glenn James

The Pacific Disaster Center’s (PDC Global) Tuesday, November 21, 2023, Tropical Cyclone Activity Report…for the Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico


There are no tropical cyclones


>>> Central Subtropical Atlantic…

An area of low pressure is expected to develop along a frontal boundary over the central subtropical Atlantic within the next day or so.

This non-tropical low is forecast to move southeastward across the central subtropical Atlantic over warmer sea surface temperatures during the next few days, and environmental conditions could allow for this system to gradually acquire tropical or subtropical characteristics.

A subtropical or tropical storm could form by the latter part of this week or this weekend, as the system turns northeastward by the weekend.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…60 percent

>>> Central Caribbean Sea…

Invest 99L

Showers and thunderstorms associated with a weak low pressure over the central Caribbean have diminished since yesterday.

Nearby dry air is forecast to prevent any additional development of the system as it moves slowly westward during the next couple of days.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…near 0 percent