By early morning, scattered showers can be expected as pockets of moisture pool across our area. During Sunday, some moisture associated with the Inter-Tropical Convergence Zone (ITCZ) could move northward across SVG. Late Sunday, lower level trough is expected across the area increasing chance for showers.
Late Monday, the Grenadines can expect few more showers compliments the ITCZ activity. Cloudiness should be increasing across SVG by Tuesday afternoon with the approach of the next tropical wave. By Tuesday night, showers and wind speeds should be increasing with possibly isolated thunderstorms into Wednesday.
Expect gentle to moderate (15 - 25km/h) east south-easterly breeze overnight; gradually backing to easterly by Sunday afternoon and becoming east north-easterly by Monday. Wind speeds should generally increase late Tuesday with the approach of the next tropical wave.
Barometric Pressure should range 1010mb - 1012mb overnight rising to 1012-1014mb during Sunday before returning to 1010mb - 1012mb by Tuesday with the approach of the next tropical wave.
North Easterly swells can be expected across SVG ranging 0.5 - 2.0m from tonight rising during Monday to peak near 1.2m on the west coasts and up to 2.4m on east coasts. Further increase expected on Wednesday…marine warnings may be issued.
Slight haze on the horizon is reducing visibility due to dust concentrations across our area, which should temporarily thin out on Monday.
NOTES:
A far eastern Atlantic tropical wave has its axis along 33W from 08N to 19N, moving westward at 10-15 kt. The wave is surrounded by a rather dry environment, which is inhibiting deep convection from forming along or near it. Only isolated showers are within 75 nm either side of the wave axis, mainly where it crosses the monsoon trough… about 1680 nm away… vicinity Wednesday
· The remnants of Issac, now a tropical wave, are located over the central Caribbean Sea. Slow re-development of this system is possible during the next couple of days as it moves west-northwestward into the northwestern Caribbean Sea. After that time, upper-level winds are expected to become less conducive for re-development. Locally heavy rains and gusty winds are forecast over portions of Hispaniola, Jamaica, and eastern Cuba during the next couple of days.
· At 5:00 pm, the center of Tropical Storm Joyce was located near latitude 33.1 North, longitude 39.6 West. Joyce is moving toward the east-northeast near 17 mph (28 km/h), and this general motion is expected to continue for the next day or so. The storm should turn back to the east on Monday and to the southeast on Tuesday, away from the Azores
· At 5:00 pm, the center of Tropical Storm Helene was located near latitude 40.2 North, longitude 32.1 West. Helene is moving toward the northeast near 24 mph (39 km/h), and this motion is expected to continue with an increase in forward speed during the next couple of days. On the forecast track, Helene should pass near or over the western Azores tonight and then approach Ireland and the United Kingdom Sunday night and Monday.
· At 5:00 pm, the center of Tropical Storm Florence was located near latitude 33.6 North, longitude 79.9 West. Florence is moving toward the west near 2 mph (4 km/h), and a slow westward motion is expected to continue through today. A turn toward the west-northwest and northwest is expected on Sunday. Florence is forecast to turn northward through the Ohio Valley by Monday.