A tropical wave continues to affect the islands tonight. Though low level moisture remains elevated a present stable and dry mid to upper levels will inhibit any significant shower activity.
The Atlantic high pressure system will dominate the weather pattern across Saint Vincent and the Grenadines thereafter. Therefore, strong easterly trades will bring moisture into the vicinity resulting in some scattered showers from time to time especially in the early morning and late evenings. Wind speeds are forecast to increase to approximately 50km/h on Monday and consequently sea conditions should become moderate to rough (2.0-2.5) in open waters. A small craft warning may be issued.
After which, around Tuesday, mid to upper level instability is forecast to be to the east of the island chain. A tropical wave currently analyzed at 52W will also be in the vicinity and model guidance is indicating that an active Inter-Tropical Convergence Zone (ITCZ) in conjunction with this mid to upper level trough like feature will generate cloudy skies, scattered showers and possible thunderstorm. Though model guidance is indicating most of the shower activity to be over Trinidad and Tobago, this instability will dominate the weather pattern across the islands well into Wednesday and it is around this time that some showers are likely across Saint Vincent and the Grenadines. Saharan dust intrusion is forecast to thin out around Tuesday.