1. Dorian will continue to have significant impacts in portions of eastern Canada tonight. Dangerous storm surge impacts are likely in portions of the northeastern Gulf of St. Lawrence and western Newfoundland. Tropical-storm-force should continue over portions of Newfoundland. Refer to information from the Canadian Hurricane Centre for more information on these hazards.

WHAT'S NEW:

The Canadian Hurricane Center has changed the Hurricane Warning to a Tropical Storm Warning for the west coast of Newfoundland, and has discontinued all warnings for Newfoundland south of Cape Anguille.

SUMMARY OF ALERTS:

A Tropical Storm Warning is in effect for...
- Cape Anguille to Fogo Island
- Mutton Bay to Mary's Harbour

A Tropical Storm Warning means that tropical storm conditions are expected within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service.

WIND: [TOP] Tropical storm conditions are expected in the Tropical Storm Warning area tonight.

STORM SURGE: [TOP] A dangerous storm surge is likely in the northeastern Gulf of St. Lawrence and the West Coast of Newfoundland.

RAINFALL: [TOP] Dorian is expected to produce rainfall accumulations of 1 to 2 inches across far eastern Quebec into Newfoundland and Labrador.

SURF: [TOP] Large swells are affecting the coast of Atlantic Canada, and they will continue to affect that area during the next couple of days. Swells along the mid-Atlantic and New England coasts of the U.S. will continue for another day or so. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office.

At 500 PM AST (2100 UTC), the center of Post-Tropical Cyclone Dorian was located near latitude 51.0 North, longitude 57.5 West. The post-tropical cyclone is moving toward the northeast near 23 mph (37 km/h) and this motion is forecast to continue tonight. A motion toward the east-northeast is expected Monday through Tuesday. On the forecast track, the center of the post-tropical cyclone should move near or over northern Newfoundland or eastern Labrador during the next few hours, then move away from Atlantic Canada later tonight.

Maximum sustained winds have decreased to near 65 mph (100 km/h) with higher gusts. The post-tropical cyclone should continue to weaken, and it is forecast to be absorbed by another low pressure system on Tuesday.

Tropical-storm-force winds extend outward up to 355 miles (575 km) from the center. Daniel's Harbor, Newfoundland, recently reported sustained winds of 39 mph (63 km/h) and a gust of 63 mph (101 km/h).

The estimated minimum central pressure is 968 mb (28.59 inches).

The center of Post-Tropical Cyclone Dorian is over the northeastern Gulf of St. Lawrence. An ASCAT-B overpass several hours ago showed winds of 55-60 kt to the southeast of the center, and much of this area of wind has moved onshore in western Newfoundland. Based on these developments, the initial intensity is lowered to 55 kt. The global models continue to forecast Dorian to steadily weaken until the cyclone is absorbed by another large extratropical low to its north between 36-48 h. The Ocean Prediction Center (OPC) once again provided guidance on the forecast intensity and wind radii.

The cyclone continues moving northeastward or 050/20 kt. This general motion should continue through tonight, with the center of Dorian passing near or over northwestern Newfoundland or eastern Labrador on its way into the far north Atlantic. This should be followed by an east-northeastward motion for the remainder of the cyclone's life. The dynamical model guidance continues to be in good agreement, and the new official track is again an update of the previous advisory.

The National Hurricane Center will continue to issue advisories on Dorian as a post-tropical cyclone until the threat to eastern Canada has ended.