As Tropical Storm Harvey heads for Central America, two other Atlantic systems weaken

Tropical Storm Harvey has weakened since yesterday, the National Hurricane Center reports.

It is currently moving west at around 21 mph with sustained winds around 40 mph, but it has become less organized and an Air Force Reserve Hurricane Hunter aircraft was unable to confirm any tropical storm force winds in its most recent flight, though a complete sampling of Harvey was not possible.

Harvey is expected to strengthen once it reaches warmer waters over the western Caribbean in the next 12 to 24 hours. It is expected to reach peak intensity in the next 72 hours, with predicted sustained winds of 70 mph. That would put it just shy of classification as a category one hurricane.

There are currently no coastal warnings or watches in place, but Harvey is expected to make landfall in Central America at some point Monday morning and follow a track that will take it through the Yucatan Peninsula before it dissipates.

Two other systems being monitored by the NHC have seen their chances of becoming tropical cyclones fall since yesterday.

A disturbance about 300 miles east-northeast of the northern Leeward Islands is expected to have difficulty gaining strength due to environmental conditions, with only a 20 percent chance of developing in the next two days and a 40 percent chance in the next five.

A second disturbance, located roughly halfway between the Lesser Antilles and Africa, is in similarly unfavorable conditions, and is given only a 10 percent chance of developing in the next two days and a 20 percent chance in the next five.

This story was originally published August 19, 2017 at 11:38 AM with the headline "As Tropical Storm Harvey heads for Central America, two other Atlantic systems weaken."