A fluctuation in moisture level will result in intermittent showers across Saint Vincent and the Grenadines during the next 48 hours.
The most significant shower activity is forecast from around Wednesday afternoon. Model guidance is indicating moderate showers across the Grenadine Islands around this time, spreading to the mainland by evening.
The light wind regime continues, resulting in humid conditions across St. Vincent & the Grenadines tonight. A few light isolated showers are anticipated by mid-morning Tuesday while unstable conditions may trigger some occasional moderate showers by nightfall and into the early hours of Wednesday. A topical wave should begin to interact with the island chain by Wednesday evening with light to moderate showers quite likely heading into Thursday. There is also a slight chance for isolated thunderstorms by mid-afternoon Thursday as this feature affects the islands.
Humid conditions and localised activity should persist into tomorrow as a south easterly light wind regime continues. Although fair conditions are anticipated early Sunday, a northward migration of the ITCZ coupled with interaction from a tropical wave could generate occasionally cloudy skies and trigger a few scattered showers over the Grenadines during mid afternoon. These conditions could extend to the mainland by nightfall into Monday with a low chance of isolated thunderstorms.
Occasional showers are forecast across Saint Vincent and the Grenadines tonight, with the chance of showers increasing tomorrow morning as a weak trough move across the island chain. Model guidance is indicating the possibility of isolated thunderstorms. After which, mostly fair conditions are forecast into Saturday before a tropical wave begins to affect SVG sometime around Saturday afternoon. Moderate showers and isolated thunderstorms are possible mainly across the Grenadine Islands. Sunday is forecast to be mostly fair.
A few isolated showers are forecast across St. Vincent & the Grenadines tonight into tomorrow morning. Humid conditions are anticipated across Saturday as a south easterly light wind regime persists. In addition, a tropical wave edges closer to the islands by mid afternoon and could trigger some scattered showers in the process. Mostly fair conditions are anticipated early Sunday, however a northward migration of the ITCZ coupled with interaction from the aforementioned tropical wave should generate some cloudy conditions with light to moderate scattered showers over the Grenadines during the afternoon. These conditions could extend to the mainland by nightfall into Monday with a low chance of isolated thunderstorms.
As of 6pm, a flash flood watch is in effect for St. Vincent & the Grenadines until 12 noon 29th July 2020.
An elongated area of low pressure is located about 360 miles east north east of St. Vincent & the Grenadines. Although the disturbance is approaching the Leeward Islands, it should dominate the weather pattern across SVG over the next 72 hours as it makes its west north-westwards track north of the island chain. Moderate to heavy showers, gusty winds, periods of rain and scattered thunderstorms are likely tonight into Wednesday. Rainfall accumulations of 75mm or 3 inches are possible by Wednesday night with isolated higher amounts in mountainous areas. Residents and motorists in areas prone to flooding and landslides or near rivers and streams should remain alert.
The flash flood watch for St. Vincent & the Grenadines has been discontinued as of 12 noon Wednesday 29th July 2020.
An elongated area of low pressure is located about 245 miles west north west of St. Vincent & the Grenadines. Although the disturbance is moving away from the Leeward Islands, it should dominate the weather pattern across SVG over the next 36 hours as it makes its west north-westwards track from the island chain. Light to Moderate showers, occasional breezy conditions and the possibility of a few isolated thunderstorms exists across Thursday. Model guidance suggests a weak low-level trough should approach the island chain on Friday. Partly cloudy skies and a few sporadic showers are likely with no significant showers associated with the feature. On Saturday, humid conditions are anticipated as light south easterly winds cross the island chain allowing for the possibility of afternoon localised conditions.
An elongated area of low pressure is located about 585 miles east south east of the Leeward Islands. The disturbance is forecast to become a tropical storm sometime tonight before reaching the Leeward Islands. Though it is approaching the Leeward Islands, the weather pattern across Saint Vincent and the Grenadines will be dominated by this system over the next 72 hours as it makes its west north-westwards track north of the island chain.
Fair conditions could become occasionally cloudy overnight into Monday, as a tropical wave crosses the islands with scattered showers and thunderstorm activity across St.Vincent and the Grenadines (SVG). Thereafter, unstable conditions with occasional showers could linger across our islands, ahead of instability associated with an area of low pressure with a high (70 - 90%) chance for development into a tropical depression/tropical storm nearing the Lesser Antilles by late Wednesday.
Moderate (~20 - 30 km/h) north north-easterly breeze are expected tonight, decreasing to gentle (~10 – 20 km/h) breeze during Monday and turning east south-easterly. East north-easterly moderate breeze could return by evening and gradually
At 5 pm, Tropical Storm Gonzalo was centered near 10.0 N 55.6 W, about 390 miles (625km) east of the Southern Windward Islands. Maximum sustained winds have decreased to near 40mp/h (65km/h) with higher gusts. “Gonzalo” is moving westward at 18 mph (30km/h) with a minimum central pressure of 1008 mb (29.77 inches).