High Pressure System should be the dominant feature for the next couple days, anchored across the western and eastern Atlantic Ocean. Mean sea level (MSL) readings across our area should range 1013 – 1015 mb this afternoon, rising to 1016 during Friday. Expect moderate to fresh (25 - 40km/h) north-easterly trades to bring occasional showers alternating with pockets of dry air at mid to upper levels.
Some reduction in speeds to moderate breeze may be noticeable during Saturday and Sunday.
A tropical wave should be passing south of our islands Friday afternoon, while a frontal boundary fades across the Lesser Antilles; a few showers can be expected across SVG. Overnight Friday, an upper level trough should dip into the Caribbean Sea with lower level troughs across the region during Saturday. On Sunday, some shower enhancement is possible due to upper level support, decreasing overnight/early Monday.
Slight to moderate seas on the west coasts should rise to range 1.2m and 1.8m overnight. On the east coasts moderate seas should rise to range 1.5m and 2.2m overnight; with north-easterly swells.
Visibility is gradually improving and good visibility should return to our horizon over the weekend.
Notes:
Tropical wave along 23W from 01N-12N, moving west at about 10 kt is noted in model guidance at 700 mb and TPW imagery with high moisture content. Scattered showers are within 120 nm on either side of the axis…. about 2280 nmiles away
Tropical wave along 52W from 02N to 13N, moving west at 10-15 kt is also noted in model guidance at 700 mb. TPW imagery depicts moderate to high moisture content near and east of the wave axis. Scattered showers extend 120 nm on either side of the wave…. about 540 nmiles away… vicinity Friday afternoon
Monsoon trough analyzed from 11N15W to 07N21W. The ITCZ extends from 03N24W to 05N34W to 08N50W. Aside from the showers related to the two tropical waves, scattered showers are within 240 nm north of both boundaries.
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