Forecast: Cloudy Periods, Showers Initially, Settled Conditions by Late Afternoon.

Weather Forecast

A weak low level pulse is presently triggering shallow clouds and generally light to moderate showers across much of Trinidad and Tobago this morning.

The surface to mid-level high pressure system is still dominating and will continue to dominate conditions across the Eastern Caribbean throughout the week. Surface to low-level convergence, on the southwestern periphery of the ridge (high pressure), will aid in the development of occasional cloudiness. There is a mild surge in low-level moisture, predominantly across Southern and Central Trinidad, fueling showers.

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By the late afternoon, through nightfall, mostly settled conditions are forecast to return. Some low-level cloud patches may traverse the region bringing the occasional cloudiness and isolated, brief showers. However, mostly fair conditions are forecast on Wednesday evening into Thursday.

Very little rainfall accumulations are forecast over the next 24 hours, with trace accumulations across both Trinidad and Tobago. Eastern Trinidad, as well as parts of Tobago, may see up to 5 millimeters.

Winds are forecast to be gentle, generally less than 30 KM/H, with gusts up to 50 KM/H at times.

Temperatures

Minimum low temperatures across Trinidad throughout the remainder of the week are forecast to range between 22°C-23°C. Low temperatures are likely to be lower across inland and mountainous areas. Across Tobago, on the other hand, low temperatures are forecast to be slightly warmer, at 24°C-25°C. Last nights minimum temperatures were 23°C at Piarco, Trinidad and 24°C at Crown Point, Tobago.

Today, maximum high temperatures across Trinidad are forecast to remain cool due to extensive cloud cover and showery activity, near 29°C. Across Tobago, maximum high temperatures are forecast to be even cooler, at 28°C.

Maximum high temperatures across Trinidad throughout the remainder week are forecast to generally remain hot, near 32°C. Across Tobago, on the other hand, maximum high temperatures are forecast to be slightly cooler, at 29°C-30°C.

The maximum high heat index, or “feel’s like” temperature is forecast to generally remain near a hot 36°C during the early to mid-afternoons of Trinidad and 33°C in Tobago.

Seas

Seas are forecast to remain moderate in open waters through the week. Waves in open waters are forecast to remain up to 2.0 meters. In sheltered areas, seas are forecast to remain smooth, below 1.0 meters.

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Winds are forecast to be from the east, at 15 to 20 knots through Wednesday. By Friday, winds are forecast to decrease to 10-15 knots, from the East to Southeast. This will be due a developing surface to mid level low pressure to the north of Puerto Rico, weakening the dominating high pressure system’s influence over the region. It will also allow for the advection of moisture from the south, creating occasional cloudiness and a few showers are likely on Friday night.

Saharan Dust (Or Lack of!)

Dust concentrations are now at negligible levels across the Southern and Eastern Caribbean. In fact, most places across the Eastern Caribbean are presently experiencing good air quality. Air quality is forecast to remain at good levels for the remainder of the week. Areas in the immediate vicinity of bushfires may experience moderate air quality.

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EPA Air Quality Index Risk Levels

At moderate air quality levels, unusually sensitive groups should consider reducing prolonged or heavy exertion.

Thankfully, long range dust models aren’t indicating any major intrusions of Saharan Dust over the next 10 days!

12Z March 26th 2019 NASA GEOS-5 Dust Model, no Saharan dust concentrations across the Eastern Caribbean over the next several days. CreditWeatherbell
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