Adverse Weather Alert Discontinued For T&T. Showers, Thunderstorms Still Forecast

Adverse Weather Alert Discontinued

The Trinidad and Tobago Meteorological Service has discontinued the Adverse Weather Alert (Yellow Level) for Trinidad and Tobago as most of the thunderstorm activity remained offshore, as forecast. However, as we’ve also forecast, isolated showers and thunderstorms are possible today through tomorrow due to the ITCZ across our islands.

Information from the Trinidad and Tobago Meteorological Service concerning the Adverse Weather Alert Discontinuation for October 24th, 2020.

According to the TTMS, “Most of the thunderstorm activity occurred offshore and conditions are improving.

Trinidad and Tobago is NOT under any tropical storm threat, watch or warning.

The color of the alert indicates the severity of the event and the probability of the event occurring. Currently, the alert level is at Green, as the Discontinuation was issued.

Image Credit: Trinidad and Tobago Meteorological Service
Image Credit: Trinidad and Tobago Meteorological Service
Image Credit: Trinidad and Tobago Meteorological Service. Adverse Weather Alert Discontinuation.
Image Credit: Trinidad and Tobago Meteorological Service

The Forecast

Overview: As Tropical Wave 58 moves away, lingering surface to low-level instability remains in place across T&T on Friday, with abundant moisture. The ITCZ will be present across T&T, with activity peaking after midnight through the sunrise, then again in the afternoon. Activity will be enhanced by an increasingly favorable upper-level environment, through wind shear will be moderate to strong. Also, a surface to low-level jet will be moving in across the region, associated with a surge in trade winds.

Tropical Wave 59 will be nearing T&T, interacting with the ITCZ on Saturday into Sunday. Abundant moisture will be present across the islands, with a low-level jet in place associated with a surge in trade winds. Highly favorable upper-level conditions due to an upper-level trough will provide enhancement of showers and thunderstorms.


Forecast: Showers and thunderstorms are forecast across both islands during the early morning hours through daybreak. A mostly breezy and cloudy day is forecast with periods of showers and thunderstorms throughout the day, continuing into the night. Severe thunderstorms are possible (violent rainfall, frequent lightning, possible funnel clouds, and even hail!) Light to moderate rain also possible between heavier activity. This is forecast to be the wettest day during the initial 4-day period.


Marine: Seas will still be moderate to rough, with waves between 2.5 meters and 3.0 meters in open waters Saturday into Sunday, particularly north and east of Trinidad. Long period swells are forecast to continue affecting our area. In sheltered areas, seas are still forecast to be below 1 meter and choppy, with large breaking waves in nearshore areas of our northern and eastern coastlines.

Winds are forecast to be fresh to strong, up to 20 knots (37 KM/H) from the east, peaking at 25 knots (46 KM/H).

Hazards: The main hazards include heavy rainfall, which may reduce visibility and gusty winds in downburst-like fashion, up to and in excess of 60 KM/H. Street or flash flooding will be possible in slow-moving showers and thunderstorms. In thunderstorm activity, frequent lightning is also possible. Gusty winds may cause power dips/outages, downed trees, and localized wind damage. Funnel clouds and waterspouts are also possible. With heavy rainfall across elevated areas, landslides and fallen trees will also be possible through the weekend.

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