A mass of Saharan dust being transported by an Atlantic High Pressure circulation should blanket the island chain this week. Persons with respiratory conditions should be aware that dust concentrations could significantly increase by Monday afternoon and PM2.5 levels could peak near 22µg/m3 while PM10 levels peak near 39µg/m3 during Tuesday. Hazy conditions of varying intensity could reduce visibility and persist for a few days. Meanwhile, lower-level moisture associated with a weak tropical wave is expected to cross our area late Tuesday into Wednesday
with occasional showers alternating with hazy conditions.
South-easterly moderate to fresh (20 - 40 km/h) breeze should continue bringing equatorial moisture/showers across our area. A reduction in speeds to moderate (20 - 30 km/h) is expected late Tuesday into Wednesday with a slight backing to easterly direction.
Slight to moderate sea conditions are expected with easterly sea-swells ranging 0.6m to 1.2m on the west coasts and 1.2m to 1.8m east coasts.
Barometric readings should slightly rise to range 1014mb to 1017mb across our area as the High Pressure builds.
Notes: Showers and thunderstorms associated with a broad area of low pressure located over the Bay of Campeche have become a little better organized since yesterday. However, recent satellite-based wind data indicate that the circulation of the low is elongated and poorly defined. This system is expected to move slowly northwestward toward the northeastern coast of Mexico, and could become a tropical cyclone before it moves inland in a day or two.
Tropical waves (TW) between west coast Africa and Lesser Antilles:
Along 19W from 11N southward w/ Scattered moderate with embedded isolated strong convection associated with this wave is noted from 03N-08N between the coast of Africa and 22W...2340 miles away… vicinity around Tuesday 11th
Along 35W from 11N southward w/ Scattered moderate convection where wave meets ITCZ from 04N-06N between 35W-38W and surge of moistened air on Total Precipitable Water... 1380miles away…vicinity around late Friday/Saturday 7th
Along 54W from 13N southward w/ Isolated showers and tstorms are on either side of wave axis south of 10N and will enhance showers and tstorms over the Lesser Antilles Tuesday/Wednesday 4th…420miles away
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