Tropical Storm "Guillermo" nears Hawaii

Tropical Storm

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Weakening Tropical Storm "Guillermo" is expected to pass north of Hawaii on August 5 and 6, 2015. NWS Central Pacific Hurricane Center in Honolulu issued a tropical storm watch for Hawaii and Maui counties, including the islands of Maui, Molokai, Lanai and Kahoolawe.

At 21:00 UTC on August 4, 2015 Guillermo had maximum sustained winds of 110 km/h (70 mph) and wind gusts to 139 km/h (86 mph). Estimated minimum central pressure was 990 hPa.

At the time, Guillermo was located about 640 km (395 miles) E of Hilo and about 935 km (580 miles) E of Honolulu, Hawaii.

This animation of images captured August 1 to 4 from NOAA's GOES-West satellite shows Tropical Storm "Guillermo" weaken from a hurricane on its way toward Hawaii.

The system is moving toward the NW near 17 km/h (10 mph), and this motion is expected to continue through tonight with a turn toward the WNW tomorrow.

On the forecast track, the center of Guillermo is expected to pass about 370 km (230 miles) NE of Hilo on Wednesday, August 5.

Tropical storm force winds extend outward up to 280 km (175 miles).

Steady weakening is expected over the next couple of days.

Tropical Storm "Guillermo" forecast track by JTWC on August 4, 2015. Image credit: JTWC/ACTF.

Total rainfall amounts of 2.5 to 7.6 cm (1 to 3 inches), with isolated maximum amounts near 17.8 inches (7 inches) mainly in higher terrain, are possible in the watch area.

Swells associated with Tropical Storm "Guillermo" will produce large surf along east facing shores of the main Hawaiian islands through much of the week.

Satellite animations

Featured image: Tropical Storm "Guillermo" on August 4, 2015. Credit: UW-CIMSS.

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