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KNMI issues need to watch for tropical storm Laura – Update August 21

Weather forecast for Saba and Sint Eustatius
Friday 21 until Saturday 22 August 2020
Today and tomorrow showers, risk thundery and with excessive precipitation
It is partly cloudy and during the day it will become more cloudy. The risk of showers will also increase in the course of the day, this change will persist also on Saturday. Locally showers will be thundery and there is a risk of excessive precipitation (25-75 mm, locally up to 125 mm). High temperatures will be around 32°C, low temperatures will be around 27°C.
Winds are easterly and moderate to fresh, 4-5 Bft, decreasing to light to gentle, 2-3 Bft. Tonight and in the night towards Saturday there is a small risk (less than 10%) of tropical storm conditions, see TCB.
Waves: Moderate, 3-6 ft. Friday evening into the night towards Saturday there is a small chance of tropical storm conditions, see TCB.
* Offshore wave height
During the hurricane season* KNMI is monitoring the Atlantic in close cooperation with the National Hurricane Center (NHC). The most recent outlook for 5 days ahead can be found at
*1st of June – 30th of November
Issued: 21/08/2020 07:38 UTC
Fri Sat Sun Mon Tue Wed
Aug 21, 2020 Aug 22, 2020 Aug 23, 2020 Aug 24, 2020 Aug 25, 2020 Aug 26, 2020
Max. Temperature 32 32 32 32 32 32
Min. Temperature 27 27 27 27 27 27
Rainfall (mm) 5/50 5/50 0/2 1/3 1/3 0
Rainfall (%) 90 90 40 50 40 20
Sunshine (%) 40 30 60 50 60 70
Wind NE 4 SE 2 E 5 E 4 E 4 E 4
For more information, see  .
Weather Saba & Sint Eustatius
Tropical Cyclone Bulletin
Date: Wednesday August 19, 2020  Time: 22:34 local time
Key Messages / Watches and warnings:
– A Tropical Storm Watch is in effect for Tropical Depression 13 (expected to become Tropical Storm “Laura” by late Thursday)
– TD 13 is expected to pass 115-122 miles (186-196 km) NNE of Saba/St Eustatius on Friday August 21, 22:00 AST
– There is a small chance of 10% of Tropical storm winds from late Friday till late Saturday
– Accumulated rainfall 1-3 inch, risk 5 inch
– 7-11 ft high waves expected from Friday night till Saturday night if TS conditions occur
Effect on local conditions
There is a small chance of 10% of Tropical Storm Conditions (maximum gusts 65-75 mph) from late Friday till late Saturday. Outside this period normal conditions are expected.
Thursday 5-7 ft. Friday 6-9 ft in NE to E swell. Friday night 7-11 ft. Saturday 7-11 ft in E swell. Saturday night 6-8 ft in SE swell. Sunday 4-6 ft. From Sunday night 5-7 ft in NE to E swell.
The tropical cyclone is expected to produce 1 to 3 inches of rain with isolated maximum totals of 5 inches through Friday night.
Local authorities and residents of Saba and St. Eustatius are advised to continue monitoring the further progress of this weather system and to take all necessary measures to safeguard life and property.
Center’s latest and forecast positions:
Till Mon Aug 24 20:00 AST, the nearest position is estimated at:
Fri Aug 21 22:00 AST 19.2N 62.7W Tropical Storm 186 km (115 mi) NNE of Saba
Wed Aug 19 23:00 AST 14.6N 47.9W Tropical Depression 1672 km (1039 mi) E of Saba
Thu Aug 20 08:00 AST 16.1N 50.8W Tropical Depression 1334 km (829 mi) E of Saba
Thu Aug 20 20:00 AST 17.4N 54.6W Tropical Storm 916 km (569 mi) E of Saba
Fri Aug 21 08:00 AST 18.4N 58.4W Tropical Storm 518 km (322 mi) E of Saba
Fri Aug 21 20:00 AST 19.1N 62.1W Tropical Storm 203 km (126 mi) NE of Saba
Sat Aug 22 08:00 AST 19.9N 65.9W Severe Tropical Storm 377 km (234 mi) NW of Saba
Sat Aug 22 20:00 AST 20.8N 69.7W Severe Tropical Storm 764 km (475 mi) WNW of Saba
Sun Aug 23 20:00 AST 22.9N 76.7W Severe Tropical Storm 1521 km (945 mi) WNW of Saba
Mon Aug 24 20:00 AST 26.2N 82.2W Severe Tropical Storm 2172 km (1350 mi) WNW of Saba
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