Locally Heavy Rainfall Forecast on Wednesday

As the Intertropical Convergence Zone drifts southward and tropical waves have stopped moving off the coast of Africa, other weather features continue to trigger rainfall across Trinidad and Tobago. Hence, the wet season carries on.

In fact, a locally heavy rainfall event is forecast on Wednesday as favorable upper-level conditions will support isolated to scattered showers and possible isolated thunderstorms across both islands.

The Extended Weather Forecast

Monday: Mostly sunny to partly cloudy skies are forecast, with highly isolated and brisk showers across both islands. By nightfall, mostly clear skies are forecast, with those highly isolated and brisk showers continuing. Gusty winds may accompany moderate to heavier showers.

Tuesday: Brisk, isolated showers are forecast throughout the day affecting both islands, interrupting partly cloudy and breezy conditions. Heavier showers and isolated thunderstorms are forecast to favor Eastern and Southern Trinidad, as well as eastern coastal waters. After nightfall, increasing showers, becoming scattered, and cloudiness are forecast. Locally heavy rainfall and gusty winds, up to 50 KM/H possible. Seas are forecast to be moderate to occasionally rough, between 12:00 PM Tuesday through 12:00 PM Wednesday in Eastern Coastal Waters.

Wednesday: Isolated to scattered showers, becoming widespread, are forecast across both islands, with heavier showers and isolated thunderstorms favoring Eastern and Southern areas of both islands. These showers will interrupt cloudy skies. Showers are forecast to become more scattered by the evening through the night with mostly cloudy skies. Locally heavy rainfall and gusty winds up to 55 KM/H possible. Seas are forecast to be moderate to occasionally rough, between 12:00 PM Tuesday through 12:00 PM Wednesday in Eastern Coastal Waters.

Thursday: Brisk, isolated showers are forecast throughout the day affecting both islands, interrupting partly to mostly cloudy and breezy conditions. Heavier showers and isolated thunderstorms are forecast to favor Eastern and Southern Trinidad, as well as eastern coastal waters. As the afternoon into the evening progresses, showers are forecast to be on the decline, interrupting partly to mostly cloudy skies. Gusty winds, up to 50 KM/H possible.

Friday: The unsettled pattern remains mostly unchanged from Thursday, with brisk isolated showers throughout the day bringing the threat of gusty winds. Isolated thunderstorms possible during the afternoon, across Southwestern areas.

Impacts This Upcoming Week

Winds: Sustained surface winds between 20 KM/H and 30 KM/H with gusts up to 55 KM/H are likely in heavy showers or thunderstorms across Trinidad and Tobago, particularly on Tuesday into Wednesday.

With wind gusts up to 55 KM/H, whole trees are expected to be in motion and there may be some inconvenience when walking against the wind gusts. Light outdoor objects may topple or become airborne such as garbage cans, potted plants, loose galvanize or construction material and other outdoor furniture. Tents may jump. Older/weaker trees may fall, bringing down utility poles and lines.

High Wind Event Precautions
High Wind Event Precautions

Rainfall: Throughout the week, daily rainfall accumulations are forecast to be isolated totals of less than 10 millimeters, with in excess of 15 millimeters in isolated thunderstorms or heavy downpours. Daily rainfall accumulations may range between 15-35 mm on Tuesday.

On Wednesday, rainfall totals between 25-100 millimeters are possible, favoring Eastern and Southern Trinidad, as well as Tobago.

Generally, with heavy showers and thunderstorm activity, street flooding, particularly in flood-prone areas or areas with poor drainage, is possible as well as flash flooding in areas where more prolonged heavy rainfall may occur.

Frequent Lightning: In addition, with forecast thunderstorms, frequent lightning is likely. Lightning can cause power outages, voltage dips, damage to life and property, particularly during cloud-to-ground lightning strikes.

Why I May Not/Will Not See Constant Rainfall?

A frequent complaint is the forecast is wrong because I didn’t experience any rainfall. Scattered showers mean that you, individually, may experience some showers intermittently throughout the day and there is a higher chance for this activity than isolated activity. Widespread showers mean that nearly all persons and areas may experience rainfall.

This week, isolated to scattered activity is forecast.

Forecast - Isolated, Scattered, Widespread - What do they mean?
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