The Atlantic’s fifth tropical or subtropical storm of the season, Don, formed early Friday over the central subtropical Atlantic. The first storm to form in the month of July, Don is currently no threat to land, and is only in a marginally favorable environment. July only averages approximately one tropical or subtropical storm per year, and Don is the only named storm to form in July so far which is not unusual.

As of 11:00 a.m. EDT Saturday, Subtropical Storm Don was centered near 36.5°N 48.8°W, and was moving northwestward at about 9 mph. Maximum sustained winds were 40 knots (45 mph), with an estimated minimum pressure of 1006 mb. Don is a very weak cyclone, with only occasional bursts of convection. This is fairly common with subtropical storms like Don. Don is expected to turn to the northeast tonight and then southeastward on Monday. Although vertical shear is expected to remain low for the next 4 days or so, Don will be moving over sea surface temperatures of around 23-24°C (73.4-75.2°F) with mid-level relative humidity values less than 50%. As a result, Don will likely to struggle to maintain organized convection over the next few days, and could degenerate into a post-tropical cyclone at any time. If Don is able to maintain enough organized convection, the environment could become slightly more favorable for intensification later next week when Don is expected to move southward into slightly warmer water. Regardless, Don is likely to remain weak and is no current threat to land.