A low pressure system, anchored in the north-central Atlantic, has been generating large northerly swells, which are propagating southwards into the Lesser Antilles.
Northerly swells of 3.0 to 4.0 m (10 to 13 ft) will start to affect the coastal waters around Saint Vincent and the Grenadines, particularly on the northern and eastern coastlines. This activity is expected to persist for at least another 24 hours, and may become even more adverse at times of high tide.
As a consequence, a HIGH-SURF ADVISORY and SMALL-CRAFT WARNING are in effect for Saint Vincent and the Grenadines from 6:00 p.m. Tuesday, 18th through to 6:00 p.m. Wednesday, 19th April.
Large waves and dangerous rip-currents can be expected mainly along the west, north, and east coasts of Saint Vincent and the Grenadines, which will create unsafe conditions for small-craft operators. Sea-bathers and other users of the sea are also advised to stay out of the water.
A Small-craft Warning means, in this case, that wind speeds of 25 to 33 knots, (47 t0 62 km/h), and/or seas equal to, or greater than, 3 m (10 ft) will be affecting the marine area.
A High-surf Advisory is issued when breaking wave action poses a threat to life and property within the surf zone. These Advisory and Warning will be in effect until 6:00 p.m Wednesday, 19th April.
The Barbados Meteorological Services, and the Saint Vincent and the Grenadines Meteorological Services, will continue to monitor the situation.