HOLT, Fla., Sept. 23, 2018–The system expected to appear as a non-tropical low-pressure system southwest of the Azores is now a sub-tropical storm.
The National Hurricane Center announced Subtropical Storm Leslie in its 2 p.m. EDT update.
Maximum sustained winds are near 40 mph and some slight strengthening is possible, but Leslie is forecast to be short-lived and may be gone by the middle of the week, according to the NHC.
Tropical Storm Kirk, in the eastern tropical Atlantic, is chugging along at 12 mph and expected to pick up speed, according to the NHC.
The storm will be moving over warmer waters with fairly low wind shear for the next day or two, so some strengthening is forecast in the short term.
Later in the forecast period, increasing westerly shear should cause weakening causing Kirk to become a low-pressure system as it nears the Caribbean.
Further north off the coast of the United States, the low-pressure remnant of Florence located between Bermuda and the Bahamas is hanging on.
The strong upper-level winds affecting the system are expected to diminish which could favor some development during the next couple of days, according to the NHC.
This low is forecast to move west and west-northwest at about 10 mph over the southwestern Atlantic until upper-level winds are forecast to strengthen again, likely limiting development.
By then, the system is expected to be moving by the southeastern coast of the United States.
Meanwhile, tropical depression 11 has weakened into a low-pressure system and will no longer require updates by the NHC.
And just because there’s not enough activity in the Atlantic right now, the NHC is expecting another non-tropical low-pressure system to form north of Subtropical Storm Leslie along a central Atlantic cold front by Wednesday.
Conditions appear favorable for this system to acquire subtropical or tropical characteristics by the latter part of this week.