Atlantic High Pressure System should dominate across the region for the next few days. Dry air is across St. Vincent and the Grenadines (SVG), but occasional showers are likely tonight, Friday and Saturday, as brisk winds push low-level clouds across the area. A low-level shearline could approach the island chain late Sunday, possibly increasing cloudiness with showers.
Moderate to fresh (25 – 40 km/h) east north-easterly breeze could be temporarily decreased (15 - 25 km/h) Sunday evening as a shearline approaches the area.
Slight to moderate (1.2 – 2.0 m) sea conditions are across our islands, with easterly swells.
The surface to mid level Atlantic high pressure system is forecast to dominate the weather pattern across the island chain during the next 72 hours. Therefore, mostly fair to occasionally cloudy skies will be experienced, and the likelihood of some showers tonight and tomorrow morning as low level moisture move along with a moderate to fresh easterly wind flow.
A low-level trough is crossing the islands and scattered showers across the Grenadines this morning could continue across St. Vincent and the Grenadines (SVG) this afternoon, possibly increasing tonight. Shower activity is likely to decrease during Tuesday. Thereafter, occasional showers can be expected as low level-moisture/clouds move along with the wind-flow.
Moderate (20 - 35km/h) east south-easterly breeze should increase to fresh (up to 40km/h) by Tuesday, turning east north-easterly late Wednesday as High Pressure builds across the region.
Moderate sea conditions are across our islands, with northerly swells
Saint Vincent and the Grenadines will experience fair conditions interchange with occasional scattered showers during the next 72 hours. A light north easterly wind flow will become mostly easterly and increase in speed (20km/h to 40km/h) from Sunday into Monday as a ridge of high pressure builds. Smooth to slight sea conditions will be noticeable, before moderate conditions (1.5m) return to the east coast around Monday. There will be no significant haze intrusion within this forecast period.
A few shallow showers are forecast across Saint Vincent and the Grenadines during the next 24hours. The chance of any significant shower activity is likely to take place on Thursday, with instability lingering into Friday as a shearline coupled with an upper level trough move across the island chain.
Showers concentrated on the leeward-side of mainland St.Vincent during early afternoon, due to daytime heating and light winds. A tropical wave lingers east of the island chain near Barbados, while a cold-frontal boundary extends from the north-west into the island chain. Relatively cool temperatures could be experienced this weekend and shower activity is likely to increase across St. Vincent and the Grenadines (SVG) during Sunday, as the tropical wave moves across the islands. Upper-levels could support thunderstorm activity during Monday.
Ahead of a low-level trough approaching the region, scattered showers are likely this evening. Unstable conditions could increase across St. Vincent and the Grenadines (SVG) during Friday, with occasional showers as a tropical wave approaches the island chain and merges with a frontal boundary from the north-west bringing relatively cooler temperatures this weekend.
Light to gentle (5 - 20 km/h) north-easterly breeze could become calm at times,
The low pressure area north-east of the island chain developed into Tropical Storm Sebastien and is moving away from the islands...NOAA 5pm forecast track and Satellite image at 4:30 pm compliments CIMMS below... A trough associated with ‘Sebastien’ lingered close to our islands with a few showers this afternoon. Scattered showers and isolated thunderstorms are likely across St. Vincent and the Grenadines (SVG) as the trough detaches and crosses the islands during Wednesday.
Weather conditions are forecast to gradually deteriorate across Saint Vincent and the Grenadines (SVG) during the next 72 hours due to low level instability and favourable mid to upper levels. Model guidance is indicating the occasional occurrence of showers and a high chance (70%) of isolated thunderstorm activity within this time period.
A few scattered showers are likely tonight into Tuesday, as a ‘low pressure area’ north-east of the island chain pulls moisture across the islands. The 'area' has medium (50%) chance of development, but is expected to move away from the islands during Tuesday. It could result in a trough moving into the region late Wednesday, with more showers and thunderstorm activity likely across St. Vincent and the Grenadines (SVG) during Thursday. See image below at 10:30 am, compliments CIMMS.
Light (less than 10 km/h) south-easterly breeze should increase to moderate (up to 30 km/h) and become easterly during Tuesday,