A tropical wave resulted in few scattered showers across our area late yesterday into this morning. The Atlantic High Pressure is rebuilding, with hazy and breezy conditions returning due to dry air and dust concentrations. Isolated brief showers, if any, are possible over the next few days,
but brief upper level support could result in few scattered showers by Thursday into Friday, as a weak shearline/trough approaches the islands. The next tropical wave axis is analyzed near 38W S of 13N in the eastern Atlantic, moving west at 15 kt (19.5 mph). Upon approaching the islands Saturday, most of the shower activity is again expected south of Grenada.
Moderate to fresh (20 - 40km/h) east south-easterly breeze should be backing to east north east by Thursday as a weak trough approaches the islands. Wind flow should return to east south-easterly during Friday.
Mean sea-level pressure should range 1014 - 1016 mb with temporary slight rise 1016 - 1018 mb on Thursday and Friday. Slight to moderate easterly sea swells can be expected to peak near 1.2m on west coasts and near 2.0m on east coasts over the next few days.
Dust concentrations thickened during the latter half of this morning and are expected to peak overnight/early morning Wednesday, with PM2.5 levels reaching near 29µg/m3 and PM10 levels reaching near 45µg/m3. The Dust concentrations associated with a Sahara Air Layer extend across the Atlantic Ocean to the island chain, reducing shower chances, visibility and air quality continuing into the weekend. Small craft operators/Mariners should exercise caution due to reduced visibility and persons with respiratory issues should be alert.