Forecast: Isolated Showers Interrupting Hazy Skies Due To Saharan Dust.

Weather Forecast

An Atlantic high-pressure system continues to dominate the Eastern Caribbean. Over the next 24 hours, low-level cloud patches will continue to traverse the island chain. These patches will bring brief cloudy patches and isolated, shallow showers which mostly remain light to moderate. These showers will interrupt mostly hazy skies as Saharan Dust concentrations begin to increase today.

Similar conditions are expected overnight. Brief cloudy patches and an isolated shower will interrupt mostly settled conditions and hazy skies. However, there is an increased chance of showers around dawn.

Breezy conditions are expected today and tomorrow (Thursday). Winds are expected to be between 15-30 KM/H, and gusts up to 55 KM/H resulting from the Atlantic high-pressure dominating the weather pattern.

Temperatures

Minimum low temperatures across Trinidad and Tobago, over the next 48 hours, are expected to be between 23°C-24°C and likely lower across inland and mountainous areas.

Maximum high temperatures across both islands are expected to be warm, between 31°C-32°C. However, breezy conditions are likely to make the “feels like” temperature, or heat index more bearable with a maximum index of 34°C in Trinidad and 32°C in Tobago.

Seas

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

Winds are expected to be from the east to northeast, at 15 to 20 knots.

Longer period swells are occurring, and are expected to end Wednesday into Thursday.

Increasing Saharan Dust Throughout Today

Over the course of today, increasing concentrations of Saharan Dust are expected to return to Trinidad and Tobago skies, with an expected peak tomorrow.

For Trinidad and Tobago, based solely on the concentration of Saharan Dust (PM 2.5 & PM 10), air quality levels will be reduced to unhealthy for sensitive groups.

Saharan Dust Forecast over the next 5 days

At this air quality level, there is an increasing likelihood of respiratory symptoms in sensitive individuals, aggravation of heart or lung disease and possible premature mortality in persons with cardiopulmonary disease and the elderly. People with respiratory or heart disease, the elderly and children should limit prolonged exertion, particularly outdoors.

Air quality levels can even be reduced to unhealthy levels due to bushfires, particularly on Thursday.

EPA Air Quality Index Risk Levels

There is increased aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly at unhealthy levels. Increased respiratory effects in the general population may also occur. People with respiratory or heart disease, the elderly and children should avoid prolonged exertion. The general population should limit prolonged exertion.

Much of the Saharan Dust will be deposited across the Atlantic Ocean and across Southern America. Models continue to indicate that dust levels will cause moderate air quality levels across Trinidad and Tobago through the Carnival 2019 period. However, guidance is trending to lesser concentrations of Saharan Dust over T&T during the weekend, through Sunday 3rd March 2019.

Regardless, throughout the next 7 days, it is highly advised that persons with respiratory ailments take the necessary precautions, not limited to those listed below.

Saharan Dust Precautions
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