4:00PM Sunday 24th February 2019: Intermittent Showers, Cloudy Periods Expected over the Next 24 Hours. Increased Concentrations of Saharan Dust Expected by Mid-Week.
A surface to low-level shearline (a line or narrow zone across which there is an abrupt change in the horizontal wind component parallel to this line) has been affecting Trinidad and Tobago over the last day or so. It is forecast to move out of our area later tomorrow.
In the interim, intermittent showers and cloudy periods are forecast, interrupting some sunny periods mainly over Central and Southern Trinidad. After midnight into tomorrow, increased cloudiness and showers are expected for Northern Trinidad and Tobago, a change from the partly cloudy and mostly settled pattern occurring, with the odds isolated showers.
By Tuesday. An Atlantic high-pressure system will be the dominant weather feature across the Eastern Caribbean through the weekend. While some isolated showers are possible, due to surface to low level confluence along the southern periphery of this feature, these showers will generally be fairly brief, interrupting settled conditions.
Mild concentrations of Saharan Dust will be present in the atmosphere by Wednesday 27th February 2019, reducing air quality levels to unhealthy for sensitive persons at times. Saharan dust combined with already reduced air quality due to the prevalence of bush fires can further reduce air quality to unhealthy levels.
Breezy conditions are occurring across the Eastern Caribbean, with winds between 15-30 KM/H and gusts to 50 KM/H, particularly in the vicinity of showery activity.
These breezy conditions are also generating moderate seas and will continue to do so through Sunday. Waves in open waters will be up to 2.5 meters through tonight, generally remaining between 2.0 and 2.5 meters through the next 4 days. Seas will be up to 1.0 meters in sheltered areas but choppy conditions are occurring. Small craft operators, sea bathers and other persons with marine interests should exercise caution, particularly along the Northeastern costs of Tobago.
Temperatures are expected to be fairly mild through the next 3 days, with highs between 30-31°C across both islands, with lows in Trinidad near 22-23°C and 23-24°C in Tobago. Note that cooler temperatures are possible across interior parts of Trinidad, as well as in mountainous areas.
Generally, 10-15 millimeters of rainfall is possible, favoring Northeastern Trinidad over the next 24 hours, with less than 5 millimeters occurring elsewhere.