A system update from the National Hurricane provides more information on what is now seen as four systems currently being watched, Invest 98, Invest 99 and a possible new system in the Atlantic as well as an area of interest in the Gulf of Mexico:
1. Central Tropical Atlantic (AL99):
Disorganized showers and thunderstorms persist in association with an elongated trough of low pressure about 1,000 miles west-southwest of the Cabo Verde Islands. Environmental conditions appear only marginally conducive for further development of this system, but a tropical depression could still form during the next several days while it moves west-northwestward at 10 to 15 mph across the central tropical Atlantic.
* Formation chance through 48 hours...medium...40 percent.
* Formation chance through 7 days...medium...50 percent.
2. Eastern Tropical Atlantic (AL98):
Showers and thunderstorms have become a little better organized in association with a broad area of low pressure located a few hundred miles west of the Cabo Verde Islands. Over the next few days environmental conditions appears mostly favorable for additional development while it moves toward the west-northwest or northwest at around 10 mph across the eastern tropical Atlantic, and a tropical depression is likely to form over the weekend before environmental conditions become unfavorable for development early next week.
* Formation chance through 48 hours...medium...50 percent.
* Formation chance through 7 days...high...70 percent.
3. East-Southeast of the Lesser Antilles:
Another area of low pressure could form in a day or so on the tail end of an elongated trough of low pressure, currently located more than 500 miles to the east-southeast of the Lesser Antilles. Some slow development of this system is possible over the weekend into early next week as it moves generally west-northwestward at 10-15 mph across the Lesser Antilles into the northeastern Caribbean Sea.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...low...20 percent.
4. Western Gulf of Mexico:
An area of disturbed weather located just north of Hispaniola is forecast to move into the Gulf of Mexico by early next week, where a broad area of low pressure could form. Some slow development of this system is possible thereafter as it moves westward and approaches the western Gulf of Mexico coastline by the middle of next week.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...low...30 percent.
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