Invest 90L, an area of low pressure that has developed along a decaying frontal boundary, has a medium chance to become the next tropical depression of the 2021 Atlantic hurricane season. After Hurricane Elsa at the start of this month, the Atlantic basin has been quiet, though this is typical for the month of July, which averages about one named storm a year.

As of 18:00 UTC Saturday, Invest 90L was centered near 29.0°N 77.4°W. Maximum sustained winds were 30 knots (35 mph), with an estimated minimum pressure of 1013 mb. 90L remains disorganized, and an earlier ASCAT pass indicates that its low-level circulation remains elongated and broad. Most of 90L’s thunderstorm activity remains south an east of the center. The 18:00 UTC run of the GFS-based SHIPS model indicates that wind shear will gradually decrease to less than 10 knots before 90L moves inland into Florida, which could allow for it to briefly become a tropical depression or weak tropical storm. An Air Force Reconnaissance Aircraft is currently en route to investigate 90L, but it appears unlikely they will find it to be a tropical cyclone. The National Hurricane Center (NHC) gives 90L a 60 percent chance of development within 48 hours. If 90L becomes a tropical storm, it will be named Fred.