Weather Information Statement 14th September, 2018 (12pm)

UPDATED WEATHER INFORMATION ON “ISAAC”

Issued: 12 pm Friday, 14th September, 2018

 

At 11:00 AM, the center of Tropical Depression Isaac was located near latitude 14.9 North, longitude 67.3 West. The depression is moving away from the island chain toward the west near 16 mph (26 km/h). Rain-bands from Isaac continue to affect the Lesser Antilles. Models indicate rainfall accumulations of 25 to 30 mm (1 and 1/2 inches) are possible across SVG into Saturday, in the wake of Isaac. Instability across our area with showers are being enhanced by a south south-easterly wind flow at the lower levels and supported by mid and upper level conditions. Last night into early morning, moderate to heavy thunderstorm activity occurred across SVG. Lingering moisture at the lower levels should maintain occasional cloudiness with decreased instability by late Saturday into Sunday.

Late Sunday, lower level trough is expected across the area increasing chance for showers. Moisture associated with the next tropical wave should be approaching the islands late Monday.

Wind speeds have picked up in the wake of Isaac, with moderate to fresh (20 - 35km/h) south-easterly breeze expected this afternoon; gradually backing to easterly by Sunday afternoon and becoming north easterly by Monday.

Small craft operators and sea bathers are asked to exercise caution especially on the east coast where swells could be above normal this afternoon. Swells should be decreasing across SVG, with East North-east swells across SVG ranging 1.0 -2.0m from tonight. An increase in wave heights can be expected by late Monday.

Slight haze on the horizon may reduce visibility by Saturday afternoon into early next week, due to a patch of dust concentration.
see image at 11:00am compliments RAMMB