The High Pressure System is rebuilding just north of our area across the Atlantic Ocean. There is sufficient moisture with cloud patches at lower levels, converging on its southern edge to bring some showers across our islands. Meanwhile, hazy conditions are thickening with poor visibility and air quality expected... Small craft operators and persons with respiratory concerns should note that moderate to thick haze
with PM2.5 levels near 30µg/m3 and PM10 levels near 45µg/ m3 are possible this afternoon. Dust concentrations should become patchy by Sunday, as the Saharan dust layer (20 - 80 ug/m3) of varying intensity moves over the island chain.
Moderate to fresh (25 - 40 km/h) north-east trades should increase to strong with higher gusts (near 55km/h) during the night-time this weekend. A wind surge could bring squally showers across our area late Sunday, ahead of a drier air mass with the High Pressure dominating for a couple days. Wind speeds should be generally reduced by Monday afternoon. The next tropical wave should approach our area late Wednesday.
Moderate to rough sea conditions are across our islands with easterly swells ranging 1.2 m – 1.8 m on the west coasts and 1.8 – 2.7 on the east coasts. Conditions should peak on Monday with wave heights nearing 2.5m on the west and 3.0 on the east coasts of our islands before retreating on Tuesday…Small craft operators and sea bathers are being warned of above normal swells, brisk winds and reduced visibility.
Tropical waves between west coast Africa and Lesser Antilles:
Along the coast of Africa near 16W from 19N southward, with moisture maximum at 700 mb. Scattered moderate isolated strong convection noted 04N-13N between 12W to 19W. … 2700 miles away
Wind surge late Sunday 30th with TW characteristics along 47W from 15N southward moving W at 15 to 20 kt… 840 miles away
Along 60W from 25N southward, moving westward around 20 kt with 700 mb trough interacting with an upper level trough, helping to promote scattered moderate showers and thunderstorms from 12N to 16N between 50W and 63W … instability lingers across our area
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