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Sam Transitions To A Powerful Post-Tropical Cyclone Over The Far North Atlantic Between Newfoundland And Iceland

Post-Tropical Cyclone

Tropics Forecast Cone at 2:05 Tuesday Afternoon, October 05th
Tropics Forecast Cone at 2:05 Tuesday Afternoon, October 05th

Location 690 miles ENE of Cape Race Newfoundland
Wind 80 mph
Heading N at 23 mph
Pressure 28.64
Coordinates 39.4W, 51.0N

Discussion

At 900 AM GMT (0900 UTC), the center of Post-Tropical Cyclone Sam was located near latitude 51.0 North, longitude 39.4 West. The post-tropical cyclone is moving toward the north near 23 mph (37 km/h), and this general motion should continue today with a further decrease in forward speed. A slow east-northeastward motion is forecast to begin by late today, and a northeastward motion is expected Wednesday and Wednesday night.

Maximum sustained winds have decreased to near 80 mph (130 km/h) with higher gusts. Although gradual weakening is forecast during the next few days, Sam is expected to remain a powerful post-tropical cyclone over the north Atlantic today.

Hurricane-force winds extend outward up to 80 miles (130 km) from the center and gale-force winds extend outward up to 460 miles (740 km).

The estimated minimum central pressure is 970 mb (28.64 inches).

Tropics Satellite at 4:51 Tuesday Afternoon, October 05th

Watches and Warnings

There are no coastal watches or warnings in effect.

Tropics Models at 3:12 Tuesday Afternoon, October 05th

Land Hazards

Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages.

SURF: Swells generated by Sam will impact the northern Leeward Islands, the Greater Antilles, portions of the Bahamas, and southeastern Newfoundland through midweek. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office.