The Western Atlantic ‘Bermuda’ High Pressure is dominant across the Leeward and Northern Windward Islands, but a deep ‘cut-off low’ in the Central Atlantic is creating instability across the southernmost section of the island chain. Cloudiness is gradually decreasing and a few showers can be expected this afternoon across St. Vincent and the Grenadines (SVG).
The ‘cut-off low’ feature, is creating favourable mid to upper level (tropical upper tropospheric trough-TUTT) support for shower activity with weak troughs propagating across the island chain. On Monday, fair to partly cloudy skies are anticipated across SVG, followed by another trough propagating the islands on Tuesday with increased moisture/cloudiness beginning across the Grenadine Islands and shifting northwards with scattered showers across SVG by evening. Deep convective clouds (towering) are possible across SVG by mid-week and isolated thunderstorms are possible; with instability being fed by lower level moisture converging across our area within an anti-cyclonic (High Pressure) circulation just east of the island chain.
Breezy conditions can be expected with moderate to fresh (25 - 40km/h) east north-easterly trades across our islands. A reduction in wind speeds is expected by tonight, and the approach of couple lower level troughs could bring occasional gentle breeze over the next few days.
East north-easterly sea-swells should be falling across SVG by this evening. On the west coasts, sea-swells should range between 0.6m and 1.2m while east coasts can expect sea-swells between 1.2m and 2.0m by Monday.
Barometric readings should fluctuate between 1011mb and 1015mb across our area as lower level troughs propagate the islands.
No significant dust concentrations are expected across our islands over the next few days.
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