Tropical storm watch issued as Hurricane Olivia continues approach

Hurricane Olivia a major storm with sustained winds of 115 mph is churning toward Hawaii and could impact the island chain as early as Tuesday evening

NASA finds Hurricane Norman hammered by wind shear

On the forecast track, Olivia will be approaching the main Hawaiian Islands later Tuesday and Tuesday night.

Now a Category 1 storm, Olivia was about 825 miles east northeast of Hilo, Hawaii as of 11 p.m. local time Saturday (5 a.m. Sunday ET), the Central Pacific Hurricane Center said. Norman was moving north-northwest at 9 miles per hour and had maximum sustained winds of 70 miles per hour.

The National Weather Service says high storm rainfall from Olivia is possible with amounts of 10 to 15 inches, with isolated amounts over 20 inches.

Helene, now classified as a tropical storm, is, according to the latest NHS advisory, expected to become a hurricane soon as well. Still, heavy rain and tropical storm-force winds could threaten the state.

Meanwhile, forecasters say Hurricane Olivia is in a low wind shear environment - and that's not a good thing. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations hard or risky. Salt Lake resident Rebecca Cabasag and her family prepared for Lane and is back to restock hurricane supplies. As NPR's Bill Chappell reported, the town of Mountain View on the Big Island recorded 51.53 inches of rain as a result of Lane, the third-highest total ever measured from a USA storm. The next updates will come from the Central Pacific Hurricane Center.

In the latest five-day forecast, the entire state is under the "cone of uncertainty" for Wednesday.

Members of the Washington Task Force 1 are in Hawaii and gearing up to help if Hurricane Olivia wreaks havoc on the islands.

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