佛得角西南99L - 13.4N 26.9W - NHC:40%

yhh

99L INVEST 250819 0600 12.5N 20.1W ATL 30 1010

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2. Eastern Tropical Atlantic:
A tropical wave located a few hundred miles to the southeast of the
Cabo Verde Islands continues to produce a concentrated area of
showers and thunderstorms. Environmental conditions appear generally
favorable for additional development over the next couple of days as
the system moves westward at around 15 mph. Towards the end of this
week, this system could encounter a less favorable environment,
limiting its development chances after that time.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 7 days...low...30 percent.

pocketbox

2. Eastern Tropical Atlantic (AL99):
A tropical wave located just southwest of the Cabo Verde Islands
continues to produce shower and thunderstorm activity while it
moves westward at about 15 mph.  A short-lived tropical depression
could form during the next day or two before environmental
conditions before unfavorable for further development late this
week.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 7 days...low...30 percent.

ygsj24

169
ABNT20 KNHC 201144
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Wed Aug 20 2025

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

Active Systems:
The National Hurricane Center is issuing advisories on Hurricane
Erin, located over the southwestern Atlantic Ocean.

Near the Leeward Islands in the Tropical Atlantic:
A tropical wave located over the central tropical Atlantic continues
to produce a broad area of disorganized showers and thunderstorms.
Environmental conditions appear conducive for gradual development of
this system, and a tropical depression could form late this week or
over the weekend while it moves near or to the north of the northern
Leeward Islands.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...medium...60 percent.

Eastern Tropical Atlantic (AL99):
A tropical wave located to the southwest of the Cabo Verde Islands
continues to produce a concentrated area of showers and
thunderstorms.  Environmental conditions appear marginally favorable
for additional development over the next day or so while the system
moves westward at around 15 mph and a short-lived tropical
depression could form.  By the end of the week, environmental
conditions are expected to become unfavorable for further
development.
* Formation chance through 48 hours...medium..40 percent.
* Formation chance through 7 days...medium...40 percent.

$$
Forecaster Bucci/R. Zelinsky