Forecast: Isolated Showers Interrupting Partly Cloudy to Clear Skies Over Next 5 Days. Saharan Dust Present Across T&T.

Due to pockets of minimal low-level moisture, as well as some low-level convergence, isolated showers are possible over the next 12 hours, favoring Trinidad. Radar imagery as of 1:00PM shows some isolated showers moving across Trinidad, with additional showers approaching Eastern Trinidad

Overnight through tomorrow, generally clear skies are likely as a high-pressure system in the Western Atlantic continues to dominate weather conditions across the region. Some low level cloud patches on the periphery of the system will bring brief partly cloudy skies, with the occasional shower, interrupting mostly clear skies and settled conditions.

Increased concentrations of Saharan dust will be present in the atmosphere over the next 18-24 hours, reducing air quality levels to unhealthy for sensitive groups at times. This dust concentration should reduce as the week progresses, with another plume of concentrated dust arriving by Saturday.

On Wednesday through Friday, similar conditions from Monday and Tuesday are forecast. However, the pressure gradient resulting from the strengthening high pressure system will produce fairly breezy conditions across the islands, with sustained winds generally above 20 KM/H and gusts to 50 KM/H. Low-level cloud patches in addition to minimal increases in low level moisture, will bring occasionally partly cloudy to cloudy skies and the isolated shower, across both islands. However, mostly dry conditions will persist.

Temperatures are expected to remain mild throughout the next 5 days, with lows in Trinidad between 21-23°C and highs 31-32°C. In Tobago, similar temperatures are expected with lows of 22-24°C and highs of 29-30.5°C. These milder low temperatures, particularly across Trinidad, are due to increased low level moisture, reducing the efficiency of longwave radiation cooling the surface at night.

No significant rainfall is expected over the next 5 days as meteorological drought conditions intensify. Generally, less than 15 millimeters of rainfall is possible, favoring Northeastern Trinidad through the next 5 days, with less than 5 millimeters elsewhere.

Seas through the next 24 hours are expected to be moderate in open waters, with waves between 2.0 and 2.5 meters. In sheltered areas, less than 1.0-meter waves are expected. Winds are expected to remain from the east, between 15-20 knots through Friday. Long period swells are occurring, with wave periods up to 15 seconds, and will continue through Thursday.

Looking beyond Friday, models are indicating that seas may become rough, with waves between 2.5 and 3.0 meters in open waters, particularly east and north of Trinidad and Tobago. This is still several days away.

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