Royal Netherlands Meteorological Institute KNMI issued a tropical cyclone bulletin pertaining to Hurricane Isaac, stating a code yellow warning was in effect from Monday.
Hurricane Isaac is expected to pass 220 to 240 kilometres (140-150 miles) south of Saba and St. Eustatius on Thursday, September 13. Track and development are still uncertain, which means uncertainty in wind speed, wave height and rainfall amounts as well, KNMI stated.
According to the weather bureau there is a 20 to 25 per cent risk of tropical storm force winds from Thursday afternoon and a 40 per cent risk of rainfall amounts of one to two inches on Thursday and Friday. During Thursday seas will increase to 15 feet from an easterly direction, gradually diminishing on Friday to five to 10 feet from an east-to south-easterly direction.
During Thursday wind speed will probably increase to strong to near gale force, six to seven Beaufort, with gusts up to 50 miles per hour (around 80 kilometres per hour), KNMI stated.
From Thursday afternoon there is a risk of 20 to 25 per cent that tropical storm force winds will affect the islands with gusts up to 60 miles per hour (around 95 km/h). Wind direction will be east- to south-easterly.
Friday winds will become fresh to strong (5-6 Bft), still from an east- to southeasterly direction.
Seas will gradually start to increase from Thursday afternoon to around 15 feet from an easterly direction. Friday waves will diminish gradually to five to 10 feet, partly in south-easterly swells.
There is a 40 per cent risk that rainfall will be between one and two inches on Thursday and Friday, according to KNMI.
Local authorities and residents of Saba and Statia are advised to continue monitoring the further progress of this weather system and to take all necessary measures to safeguard life and property.
The Daily Herald.