Tropical Weather Outlook and Summary
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ABNT20 KNHC 162337

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Wed Aug 16 2017

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane
Gert, located a few hundred miles south of Halifax, Nova Scotia.

Showers and thunderstorms associated with a low pressure system
located about 650 miles east of the Lesser Antilles have become
a little more concentrated this afternoon.  Upper-level winds are
forecast to become more conducive for development during the next
day or so while the low moves westward at 15 to 20 mph across the
tropical Atlantic Ocean, crossing into the Caribbean Sea on Friday.
Regardless of development, locally heavy rainfall and gusty winds
are expected to spread across portions of the Lesser Antilles on
Thursday night and Friday, and interests there and elsewhere in
the eastern Caribbean should monitor the progress of this
disturbance. An Air Force Reserve reconnaissance aircraft is
scheduled to investigate this system on Thursday, if necessary.
* Formation chance through 48 hours...medium...50 percent.
* Formation chance through 5 days...medium...60 percent.

A second area of low pressure is located about 950 miles west
of the Cabo Verde Islands, and its associated shower and
thunderstorm activity remains disorganized.  Gradual development
of this system is possible during the next few days while it
moves west-northwestward at 15 to 20 mph, but upper-level winds
are expected to become less conducive for tropical cyclone formation
when the disturbance moves north of the Leeward Islands this
* Formation chance through 48 hours...medium...40 percent.
* Formation chance through 5 days...medium...50 percent.

A tropical wave located southeast of the Cabo Verde Islands is
producing disorganized showers and thunderstorms.  Environmental
conditions are forecast to become more conducive for development
over the weekend while the system moves westward to west-
northwestward at about 15 mph.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...medium...40 percent.

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