Invest 99L - Development Continues

This disturbance continues to develop quickly. It is still at a low latitude and is near the Intertropical Convergence Zone (ITCZ). This area is known as the doldrums or the calms because of its monotonous, windless weather. It is where the northeast and southeast trade winds converge. It encircles Earth near the thermal equator, though its specific position varies seasonally.

US National Hurricane update at 2:00 (EDT) Tuesday 21st July 2020.

"Showers and thunderstorms associated with the low pressure area located about midway between the west coast of Africa and the Lesser Antilles continue to get better organized, and a tropical depression appears to be forming. If current trends continue, advisories could be initiated on this system this afternoon. Regardless of development during the next couple of days, less favorable conditions should limit additional development of the system by the weekend."

* Formation chance through 48 hours...high...90 percent.

* Formation chance through 5 days...high...90 percent.