At 500 PM HST , the center of Hurricane Douglas was located near latitude 19.9 North, longitude 151.4 West or 240 miles east of Hilo. Douglas is moving toward the west-northwest near 16 mph (26 km/h). This motion is expected to continue through the next couple of days. The tropical storm warning, hurricane watch, high surf warning, and flash flood watch remain in effect for Hawai’i Island. On the forecast track, Douglas will be near the main Hawaiian Islands late tonight and is expected move near, or over, parts of the state Sunday and Sunday night. Douglas could bring high winds and up to 2-5 inches inches of rain to the northern half of Hawai’i Island this evening through tomorrow morning.
Maximum sustained winds are near 90 mph (150 km/h) with higher gusts. Gradual weakening is expected over the next couple of days. However, Douglas is still forecast to be near hurricane strength when it passes near the islands. Hurricane-force winds extend outward up to 35 miles (55 km) from the center and tropical-storm-force winds extend outward up to 115 miles (185 km)
A tropical storm warning means tropical storm conditions are expected somewhere within the the warning area within 36 hours, a hurricane watch means that hurricane conditions are possible within the watch area within the next 36-48 hours.
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HAZARDS AFFECTING LAND
WIND: Hurricane conditions are expected on Oahu on Sunday and are possible across Maui County and the Big Island on Sunday. Tropical Storm conditions are expected across Hawaii County and Maui County beginning late tonight or Sunday and across Kauai County Sunday night.
SURF: Large swells generated by Douglas are expected to build tonight and affect the Hawaiian Islands Sunday into Monday, and storm surge of 2 to 4 feet above normal tides is expected near the center of Douglas. The large swells and surge will produce life threatening and potentially destructive surf along exposed shores.
RAINFALL: Heavy rainfall associated with Douglas is expected to affect portions of the main Hawaiian Islands from late tonight into Monday. Total rain accumulations of 5 to 10 inches are possible from Maui County westward to Kauai County, with the greatest amounts in elevated terrain. This rain may result in life-threatening flash flooding and land slides, as well as rapid water level rises on small streams. Douglas could produce 2 to 5 inches of rainfall over the northern half of the Big Island.