Update from the National Hurricane Center, a recently received satellite-derived wind data indicate that a well-defined low-pressure system has formed about midway between the west coast of Africa and the Cabo Verde Islands with maximum winds of about 35 mph.
Although the associated shower and thunderstorm activity still lacks some organization, only a small increase in the organization could lead to the formation of a tropical depression before the low moves near or across the Cabo Verde Islands tonight and on Monday.
Regardless of development, locally heavy rainfall and gusty winds are possible today and Monday across the Cabo Verde Islands, and interests there should monitor the progress of this system.
Even if a tropical depression does not form over the next day or so, environmental conditions appear conducive for later development, and a tropical depression is likely to form by the middle to latter portion of this week while moving west-northwestward at 15 to 20 mph across the eastern and central tropical Atlantic.
Formation chance is high for cyclonic development at 60-90% within the next 2 to 7 days. The next named storm is Erin.
The spot in yellow remains a cluster of disorganized showers and thunderstorms that continue in association with a trough of low pressure over the central tropical Atlantic. Development of this system appears unlikely during the next couple of days due to surrounding dry air, but some gradual development is possible during the middle part of this week while the system moves northward over the central Atlantic.
Formation chance in the next 2 to 7 days is 10-20%.