Weatherdem's Weblog

Bridging climate science, citizens, and policy

Atlantic Tropical Weather Update 8/27/09

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The fourth named storm of the 2009 Atlantic Hurricane Season has formed – Tropical Storm Danny was a tropical wave that had made it north of the Caribbean Islands and interacted with an upper-level low.  Enough organization occurred to allow the storm to be named.  Here are Tropical Storm Danny’s vitals as of this morning:

Center located at 27.4N, 72.1W; moving NW @ 10mph; maximum sustained winds of 60mph; minimum central pressure of 1006mb.

Tropical Storm Danny’s official track forecast is a near duplicate of Hurricane Bill’s.  He is moving around the western periphery of the sub-tropical ridge over the mid-Atlantic.  His course should take him by the east coast of the U.S., but no landfall should occur there.  Instead, T.S. Danny is expected to come ashore either over New Brunswick or Nova Scotia.  It will be a couple of more days before that final landfall area becomes more clear.

Tropical Storm Danny’s official intensity forecast intensifies him to a hurricane by Saturday morning.  He should maintain that strength through the weekend, affecting the Canadian maritimes as a Category 1 storm.

Elsewhere, Invest 94 emerged over the Atlantic early yesterday.  It is moving west across the Atlantic basin.  It is currently south-southwest of the Cape Verde Islands.  It consists mostly of disorganized thunderstorms at this time, though this might change in the next couple of days.  This system might stay to the south of where Hurricane Bill and Tropical Storm Danny moved.  If that happens, it would pass over the Windward Islands in six days.

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