The Northern Atlantic High Pressure System, weakly maintains across the Eastern Caribbean.
A few showers can be anticipated tonight and scattered showers can be expected to move across the island chain by Monday afternoon, as a shearline feature crosses the area
with a chance of thunderstorm activity during Monday night. A patch of Saharan dry air/dust (above 850mb ~ 4780ft) moving behind the shearline feature could limit shower activity during Tuesday. However, a pool of lower-level moisture is expected across our area late Tuesday, ahead of the next tropical wave.
Over the next few days, the Monsoon trough area...read more…in the Central Atlantic would be monitored closely for possible developments.
A broad area of low pressure associated with a tropical wave south of the Cabo Verde Islands has a high (70%) chance for tropical depression to form this week, while the system moves northwestward across the far Eastern Tropical Atlantic Ocean; with no threat to the Eastern Caribbean. An area of disturbed weather south-southeast of Bermuda has a low (20%) chance for gradual development during the next few days, while it moves slowly northward/ north-northwestward; with no threat to the Eastern Caribbean.
Light to gentle (5 – 20km/h) east south-easterly breeze should continue, increasing gradually to become moderate (20-30 km/h) by Tuesday. Directions should occasionally back to east north-easterly. Sea conditions across SVG are slight (0.5 – 1.2m), increasing slightly late Monday to peak 1.5 on east coasts. A patch of Saharan dry air/dust could reduce visibility and air quality overnight Monday into early Tuesday. Small craft operators and persons with respiratory concerns should be aware, as PM2.5 levels could near 15µg/m3 and PM10 levels could near 50µg/m3
Tropical waves and troughs between west coast Africa and Lesser Antilles:
Along the Cabo Verde Islands near 25W, from 20N southward, moving W 15 to 20 knots with scattered moderate to isolated strong rain-showers, in clusters from 10N to 16N between 23W and 30W....2160 miles away (associated with low pressure area and remaining in far east Atlantic)
Along 41W/42W, from 16N southward, moving W 20 knots with Monsoon trough related rain-showers from 10N to 14N between 40W and 44W....1140 miles away…nudging northwards Wednesday 4th