Hurricane Hector is tracking for a close call with Hawaii's Big Island, parts of which are still coping with destruction from the ongoing eruption of the Kilauea volcano.
The eye of the storm was 290 miles southeast of Hilo and 500 miles southeast of Honolulu by Wednesday morning, the NHC said, and it's projected to come within 150 miles of the Big Island.
On Aug. 6 at 4:40 a.m. EDT (0840 UTC) NASA's Aqua satellite found coldest temperatures of strongest thunderstorms (yellow) in Tropical Storm John were as cold as or colder than.
Meanwhile, a bushfire on the Big Island doubled in size overnight and has burned through more than 600 hectares of Hawaii Volcanoes National Park.
Get all the latest re/insurance industry news with our daily newsletter - sign up here. "If it does, it will become Typhoon Hector".
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However, Hector could bring at least parts of the Big Island tropical-storm-force winds (39-plus mph) today, particularly on the southern tip of the island and eastward-facing coasts.
Farther west was recently formed Tropical Storm Kristy, which had sustained winds of 50 miles per hour (85 kph) and could become a hurricane. It will not affect any land areas.
So far this season we have had Subtropical Storm Alberto, which formed in May, as well as Hurricane Beryl and Hurricane Chris. The rest of the Atlantic Basin is quiet at this time.
An American-based meteorology group has said cool water in the Atlantic could lead to fewer tropical storms this year.
The hurricane center said Kristy was likely to strengthen somewhat in coming days. A trough is then forecast to take Debby on a northeasterly track afterward, but fall apart afterward.