A broad surface to mid-level trough lingers across the island chain with scattered showers and isolated thunderstorm activity across our islands.
Over the next few days, a couple shearlines are expected to cross the island chain with occasional cloudiness and scattered showers with marginal upper level support for thunderstorm activity across St.Vincent and the Grenadines (SVG).
These shearlines should propagate from a tropical wave in the Central Atlantic Ocean which is losing its energy due to Saharan dust/dry air north of the tropical wave and wind shear in the vicinity. After the passage of a shearline/trough late Saturday, the Atlantic High Pressure System should rebuild across our area.
Light to gentle (10 – 20km/h) south-easterly breeze should continue into Thursday, increasing to moderate by evening (up to 30km/h). Sea conditions on the west coasts should be smooth to slight with wave heights less than 0.6m. Slight sea conditions are expected across the east coasts with wave heights gradually increasing during Friday to become slight to moderate (1.0 – 1.5m). Occasional thin haze should continue across SVG, with clearing expected during Friday before slight/moderate hazy conditions return on Saturday. Barometric readings should range 1014 - 1017mb over the next few days.
Tropical waves and troughs between west coast Africa and Lesser Antilles:
Along 15W S of 18N, moving W at around 15 kt with abundant moisture noted in the latest TPW and a broad area of convection. Numerous moderate to isolated strong convection is seen from 06N-10N between 12W-21W....2760miles away…vicinity mid-next week
Trough along 35W S of 18N, moving W around 20 kt and TPW imagery continues to show the wave accompanied by a large area of high moisture content. Scattered moderate showers are seen from 03N-12N between 31-38W...1560miles away…vicinity Saturday 24th
Broad trough crossing along 21N58W to 11N61W moving W at 15-20 kt with isolated showers seen within 150 nm east of the tropical wave from 12N-21N... today
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