A wake cloud stretching from western side of Barbados resulted in increased cloudiness across the northern portion of mainland St.Vincent, with few scattered showers this evening. Overnight, a low level trough axis is expected to cross the island chain and moisture converging behind the axis could result in a few scattered showers from early Wednesday.
A lower level trough, on the south-western side of the Atlantic High Pressure could move across our islands with weak instability on Friday, but dry mid-levels may inhibit weak upper level support. However, models indicate some mid-level divergence could support possible low level moisture resulting in few showers late Friday.
Moderate (20-28km/h) easterly breeze should increase to fresh (29-38km/h) overnight. Fresh to possibly strong east south easterly breeze (across the Grenadines) are expected on Wednesday and Thursday reducing to moderate by Friday, becoming gentle (12-19km/h) late Friday.
Mean sea-level pressure should range between 1012-1015mb overnight, increasing slightly on Wednesday to range 1014-1017mb until Friday. Seas are slight to moderate (up to 1.2m on west coasts and up to 1.8m on east coasts) in open water, but gradually increasing. Wave heights on the west, could range 1.2m - 2.0m and on the east, from 2.0m - 2.5m by Thursday. Seas should retreat again overnight Thursday back to slight to moderate conditions. Few patches of Sahara dust with varying intensity are causing fluctuations in visibility.