CURRENT TROPICAL CYCLONES:
Tropical Cyclone 18L (Sam)…is located about 900 miles south-southeast of Bermuda
Tropical Cyclone 20L (Victor)…is located about 555 miles south-southwest of the Cabo Verde Islands
Tropical Cyclone 18L (Sam)
SAM GAINING STRENGTH AND SIZE OVER THE WESTERN ATLANTIC
According to the NHC Advisory 30…Sam is moving toward the northwest near 12 mph (19 km/h), and this general motion with an increase in forward speed is expected during the next couple of days. A turn toward the north and northeast is anticipated by Friday night. On the forecast track, Sam will continue to pass well to the east-northeast of the northern Leeward Islands through tonight, and pass to the east of Bermuda early Saturday. Data from a NOAA Hurricane Hunter aircraft indicate that maximum sustained winds have increased to near 145 mph (230 km/h) with higher gusts. Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some fluctuations in intensity are expected during the next couple of days, but Sam is forecast to remain a major hurricane through late this week, with more significant weakening anticipated over the weekend. Hurricane-force winds extend outward up to 65 miles (100 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km).
HAZARDS AFFECTING LAND
SURF: Swells generated by Sam will impact the Lesser Antilles during the next several days. Swells are expected to reach Bermuda and the Bahamas in a day or two, and then spread to the United States east coast by this weekend. These swells could cause life-threatening surf and rip current conditions.
Tropical Cyclone 20L (Victor)
VICTOR MOVING GENERALLY WEST-NORTHWESTWARD ACROSS THE FAR EASTERN ATLANTIC
According to the NHC Advisory 3…Victor is moving toward the west-northwest near 13 mph (20 km/h) and this general motion is expected to continue through Friday, followed by a turn toward the northwest late Friday or Friday night. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Steady strengthening is forecast, and Victor is expected to become a hurricane in a day or two. Tropical-storm-force winds extend outward up to 60 miles (95 km) from the center.
>>> Disorganized showers and thunderstorms continue in association with a trough of low pressure located about 1000 miles southwest of the Cabo Verde Islands. Some slow development of this system is possible during the next couple of days while it moves slowly west-northwestward across the central tropical Atlantic. Afterwards, environmental conditions are forecast to become less conducive for development.
* Formation chance through 48 hours…low…30 percent
* Formation chance through 5 days…low…30 percent
Showers and thunderstorms have mostly diminished with an area of low pressure associated with the remnants of Peter, located several hundred miles south of the coast of Newfoundland. This low is becoming poorly defined while moving northeast over cooler waters and into a region of strong upper-level winds. Further development is no longer anticipated.
* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 5 days…low…near 0 percent