IR Satellite

 

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A broad surface to mid-level trough is expected to cross the island chain bringing scattered showers with isolated thunderstorms across our area, St.Vincent and the Grenadines (SVG) this afternoon with a few showers possible on Wednesday.

By late Thursday, a couple shearlines should start crossing the islands ahead of the next tropical wave resulting in occasional cloudiness and showers with limited upper level support.  

Mostly fair weather is expected across St. Vincent and the Grenadines (SVG) during the next 24 to 36 hours, as the Atlantic high pressure system continues to be the dominate feature. However, patches of low level clouds moving along an easterly wind flow are likely to generate occasional isolated showers.

Unstable conditions associated with the passage of a weak low level trough will continue to produce cloudy conditions and shower activity across St. Vincent and the Grenadines during the next 6-12 hours.

Overnight, unstable conditions associated with the passage of a tropical wave generated showers and thunderstorms across potions of Saint Vincent and the Grenadines (SVG).  A gradual improvement in the weather conditions can now be expected, as the Atlantic High Pressure System re-establishes itself across the Lesser Antilles.  However, patches of low level clouds moving along an easterly wind flow could result in occasionally cloudy skies and a few passing showers.

The Atlantic High Pressure System will remain the dominant feature across the island chain during the next 24 hours, generating breezy conditions along with brief occasional showers.

By Wednesday, a tropical wave moving near 17 mph (27 km/h) is expected to affect potions of the Lesser Antilles including SVG. Due to dry Saharan dust haze around the environment of the wave, showers are expected to be occasional, and light to moderate in intensity.

A low level trough is creating weak instability with occasional showers across our islands today. Additionally, a wake cloud stretching off the west coast of Barbados during late morning, should reach mainland St.Vincent and northern Grenadine islands by mid-afternoon.

The next tropical wave should be crossing the islands on Sunday, with some showers possible across St.Vincent and the Grenadines (SVG) by afternoon

The Atlantic High Pressure is dominant across the islands. A weak trough should trail across the islands on Friday, followed by a low level trough creating weak instability with scattered showers on Saturday. Gentle to occasionally moderate (10 – 30km/h) south-easterly wind-flow should become north-easterly by late Friday. 

The northward positioning of the Inter-Tropical Convergence Zone (ITCZ) and the leading edge of a tropical wave created cloudy skies across our islands from mid- morning. Showers and thunderstorm activity should move across the islands later today, with instability being elevated on Thursday…Residents and motorist should be alert for possible flash-flooding and thunderstorm activity later today into Thursday.

Instability remains elevated across the islands with moisture pooling ahead of another tropical wave/trough which detached from previous tropical wave. The axis is expected to cross the northern Windward and Leeward Islands late Tuesday. A northward positioning of the Inter-Tropical Convergence Zone (ITCZ) should add equatorial moisture on Wednesday. Following quickly behind, is another tropical wave to bring cloudy skies, showers and possibly thunderstorm activity across the island chain by Wednesday night into Thursday.

A WEATHER ALERT remains in effect for St. Vincent and the Grenadines (SVG)…Un-favourable conditions are resulting in degeneration of the elongated area of low pressure east of the island chain. An associated low pressure centre near 13.6N 56.5W with low chance (10%) of development into a tropical depression, having low values in convective available potential energy. The leading edge stretches across the island chain this morning and moisture levels are sufficient to bring significant rainfall accumulations across some islands. Residents and motorists across St.Vincent and the Grenadines should remain alert, especially in areas prone to flash-flooding and thunderstorm activty….