Instability associated with the Inter-Tropical Convergence Zone(ITCZ) ahead of a tropical wave triggered occasional showers across Saint Vincent and the Grenadines earlier today(Sunday). Additional activity is expected to intensify from tonight and along Monday as the aforementioned wave affects our islands. A flash-flood watch is in effect for SVG as of 6pm today, 22nd August 2021 and would remain in effect until 6pm Monday 23rd August 2021. Residents and motorists in areas prone to flooding and landslides or near rivers and streams should exercise extreme caution. Model guidance suggests showers could linger into Tuesday and Wednesday as the atmosphere is expected to remain moist. The upper-level atmosphere would also become occasionally favourable and support pockets of deep showers within the next 72 hours. The SVG Meteorological Service will continue to monitor the progress of the wave and provide the necessary updates.
Occasionally strong(near 40 km/h) easterly to east north easterly trades will move across the islands tonight, increasing to near gale(50km/h) by Monday. Winds speeds could temporarily decrease(20 -35km/h) on Tuesday before becoming strong again and east south easterly by Wednesday evening. Consequently, seas are currently moderate in open water peaking near 1.5m on western coasts and up to 2.5m on eastern coasts. Rough conditions are possible since near gale wind conditions are anticipated. Small craft operators and sea bathers should exercise extreme caution for above normal sea swells and gusty winds and reduced visibility due to heavy showers. Varying concentrations of Saharan dust haze will linger across the island chain during the next 72 hours period.
A FLASH FLOOD WATCH IS IN EFFECT FOR SVG AS OF 6PM TODAY AND WOULD REMAIN IN EFFECT UNTIL 6PM 23rd AUGUST 2021.