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Bertha now tropical storm, and weakening

Bertha now tropical storm, and weakening

MIAMI -- Tropical Storm Bertha continues to weaken as it moves northward in the Atlantic, posing no direct threat to the U.S. East Coast.

The storm's maximum sustained winds decreased to near 50 mph (85 kph) Tuesday evening with even more weakening expected over the next two days.

The U.S. National Hurricane Center says Bertha is centered about 415 miles (665 kilometers) northwest of Bermuda and is moving north-northeast at about 21 mph (33 kph).

Tracking a weakening Bertha

Tracking a weakening Bertha

Bertha was upgraded to a hurricane at 11am Monday with maximum sustained winds at 80mph. The storm weakened a little this afternoon as winds are now down slightly to 75mph. The storm is moving to the north at 18mph. There are no coastal watches or warnings issued at this time. The storm will not have a direct hit on the eastern seaboard, however it will be rough surf and strong rip currents to the Georgia and Carolina coastlines. It will spread rough surf to the mid Atlantic coast and northeast coast mid week.

Here is the official 5pm advisory from NHC:

Tropical Storm Bertha rakes Dominican Republic

Tropical Storm Bertha rakes Dominican Republic

SAN JUAN, Puerto Rico -- Tropical Storm Bertha emerged from the eastern Dominican Republic early Sunday after whipping Puerto Rico with heavy rains and strong winds that knocked out power in parts of the region.

As it headed for the Turks and Caicos, the storm's maximum sustained winds dropped slightly to 45 mph, but slow strengthening was expected by Monday. Bertha was centered about 45 miles west of Grand Turk Island and was moving northwest at 21 mph.

Tropical Storm Bertha moves into the Caribbean

Tropical Storm Bertha moves into the Caribbean

MIAMI -- Tropical Storm Bertha has passed across the Windward Islands and into the eastern Caribbean Sea.

The National Hurricane Center in Miami says the tropical storm's maximum sustained winds as of 5 p.m. ET were at 40 mph. The storm was centered about 20 miles northwest of Fort de France, Martinique or 405 miles southeast of San Juan, PR. The storm is moving to the west-northwest at 24 mph with a minimum central pressure of 1007 MB or 29.74 inches.

A tropical storm warning is in effect for Dominica, Martinique, Puerto Rico, Vieques, Culebra, the US and British Virgin Islands.

Tropical system in Atlantic gaining strength

Tropical system in Atlantic gaining strength

A well-defined low pressure system located about 650 miles east of the southern Windward Islands has been producing organized shower and thunderstorm activity during the past several hours.

If this activity persists, tropical depression or tropical storm advisories will be initiated later this morning. Interests in the Lesser Antilles should monitor the progress of this disturbance as it moves west-northwestward at 15 to 20 mph, and watches or warnings may be required for some of these islands later today.

A Hurricane Hunter aircraft is scheduled to investigate the system this afternoon.

* Formation chance through 48 hours: High, 70%

* Formation chance through 5 days: High, 70%

If it turns into a Tropical Storm it will be named Bertha.

Tropical disturbance in Atlantic getting better organized

Tropical disturbance in Atlantic getting better organized

An area of low pressure in the Atlantic is becoming better defined, according to satellite data from the National Hurricane Center.

Associated shower and thunderstorm activity continues to organize and a tropical depression could form by Wednesday

The disturbance could become Tropical Storm Bertha by Friday.

Tropical Depression struggling to hold together

Tropical Depression struggling to hold together

Tropical depression number 2 is struggling to hold together as it moves to the west. The depression still has 35mph winds and is moving toward the west at 18mph. It is encountering wind shear and dry air as it moves to the west. It will weaken as it gets closer to the Lesser Antilles. Right now, the storm is about 800 miles away from the islands.

It is not forecast to become a tropical storm, but if it does happen to get up to tropical storm strength, its name would be Bertha.

INTERACTIVE MAP: Track the tropical system