Forecast: Low to Medium Chance of Isolated Showers, Generally Hot, Hazy Day.

Weather Forecast (Next 24 Hours)

As of 8:00 AM Tuesday 7th May 2019, mostly hazy and partly cloudy skies are occurring across Trinidad and Tobago. A few very isolated showers favoring Eastern Trinidad are occurring. Breezy conditions are forecast across both islands. Isolated showers are possible across Trinidad and Tobago throughout the day, mostly subsiding by the evening. Showers are to initially favor Eastern T&T, then across Trinidad and Tobago by the late morning through the afternoon.

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Throughout Tuesday, mostly hazy skies with partly cloudy conditions are forecast across Trinidad and Tobago. Isolated showers, resulting from low-level cloud patches and increased low-level moisture are forecast to traverse the region. These patches are forecast to bring some isolated showers to eastern parts of Trinidad and Tobago mainly. Day time heating is forecast to trigger cloud development and isolated showers across both islands by the late morning.

Saharan dust is present in mild concentrations across Trinidad and Tobago and is forecast to remain in place over the next two weeks. An additional surge of dust is forecast this weekend.

Overnight, mostly hazy and settled conditions are forecast to persist. However, isolated showers are forecast, mainly after midnight, to develop, affecting Northern and Eastern Trinidad and Tobago.

Generally gentle to fresh breeze is forecast (12-38 KM/H) for Monday mainly from the east. However, wind gusts in the range of moderate to strong wind are possible (20-45 KM/H) across Trinidad and Tobago in the vicinity of showers.

Beauford Wind Scale Land Impacts
Beauford Wind Scale Land Impacts

With wind gusts up to 45 KM/H, whole trees can 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, loose galvanize or construction material and other outdoor furniture. Tents may jump. Winds are forecast to lessen as the weekend progresses.

Looking towards Wednesday through Friday, fluctuations in Saharan Dust is forecast keeping hazy skies in place. However, a low-level to surface trough in the Central Atlantic is forecast to move across Trinidad, Tobago and the Southern Windwards Thursday into Friday. Low-level and mid-level moisture is forecast to increase on Wednesday, through Friday. Atmospheric conditions may be sufficient for thunderstorm development. Regardless, increased showers, isolated heavy showers, gusty winds, and possible street flooding are all on the table for Thursday into Friday.

Important note for this surface trough is that some organizations are designating it as a tropical wave, due to its origins near Africa. However, the National Hurricane Center did not determine classical genesis from the African Easterly Jet and convection over North Africa, hence keeping this wave analyzed as a surface trough over the Central Atlantic. In addition, the classical atmospheric dynamics preceding and proceeding the wave axis are not typical of a tropical wave.

This may come across to the layman as pedantic, as the impacts of locally heavy rainfall, thunderstorms, and gusty winds are possible regardless of designation. However, the designation is significant to Trinidad and Tobago because the passage of the first Tropical Wave (or the first time the ITCZ modulates across T&T) signals the start of the rainy season for the islands. Following the passage of the first true tropical wave, as designated by either the National Hurricane Center or by the discretion of the Trinidad and Tobago Meteorological Service, the rainy season is declared.

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Temperatures

Last night’s minimum temperatures were 25°C at Piarco, Trinidad, and 24.7°C at Crown Point, Tobago. Tonight’s minimum temperatures are forecast to be near 24°C at Piarco, Trinidad, and 25°C at Crown Point, Tobago.

Today’s maximum high temperatures across T&T is forecast to be near 33°C at Piarco, Trinidad and 31°C at Crown Point, Tobago. Similar temperatures are forecast through the next three days, with maximum high temperatures forecast to be near 33°C at Piarco, Trinidad, and 31°C at Crown Point, Tobago. Heat indices may top at 36-38°C at Piarco, Trinidad and 33-35°C at Crown Point, Tobago. The heat index is an index that combines air temperature and relative humidity, generating a “feel’s like” temperature.

Seas

Seas are forecast to remain moderate in open waters through the week. Waves in open waters are forecast up to 2.0 meters, particularly East of Trinidad and Tobago over the next 24 hours. In sheltered areas, seas are forecast to remain smooth, below 1.0 meters. Winds will be from the east through the next several days at 15-20 knots from the east.

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Mild Saharan Dust Present Across Trinidad and Tobago

Saharan Dust concentrations are mild across Trinidad and Tobago on Monday. Mild concentrations are forecast to linger for at least the next two weeks, with some fluctuations. An increased concentration of dust is forecast to arrive across T&T by the weekend.

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