Tropical Storm Humberto picked up strength south of the Cape Verde islands, where tropical storm warnings are in effect, weather forecasters said Monday.
Humberto, with maximum sustained winds of 45 mph, was about 85 miles south-southeast of the Cape Verde island of Fogo, traveling west at 19 mph, the National Hurricane Center in Miami said in its 11 a.m. EDT advisory.
A tropical storm warning was in effect for the southern Cape Verde islands of Maio, Santiago, Fogo and Brava.
Humberto is expected to strengthen and become a hurricane during the next few days.
Humberto was expected to remain on its westerly heading Monday, shifting to the west-northwest with a slight decrease in forward speed, forecasters said. The storm was expected to turn toward the north-northwest on Wednesday.
On the forecast track, Humberto's center will remain south and west of the Cape Verde islands.
Humberto could produce total 2-4 inches across the southern Cape Verde islands with isolated amounts of up to 6 inches possible, forecasters said. The rains could produce heavy flooding and mudslides.
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Original headline: Tropical Storm Humberto could become hurricane by Wednesday
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