Light to moderate showers are likely tonight into tomorrow across St. Vincent and the Grenadines as a result of unstable conditions interacting with a favourable mid to upper-level environment. Occasional showers could be expected on Friday, but more significantly, as additional moisture crosses the islands, moderate to heavy showers accompanied by thunderstorms, gusty winds and periods of rain are forecast for Saturday. A flash-flood watch is in effect for SVG from 6pm today. Residents and motorists in areas prone to flash-flooding and land-slides, or near rivers and streams should be prepared.