Update Tropical Storm Guillermo, Today’s Weather Forecast
A Small Craft Advisory is in effect for the ʻAlenuihāhā channel as well as waters to the west and south of the Big Island through 6:00 a.m. Sunday. East winds up to 25 knots are expected with rough seas up to 10 feet.
**Click directly on the images below to make them larger. Charts include: Big Island high/low forecasted temperatures, projected winds, chance of cloud cover, projected localized weather conditions, vog/SO2 forecast and expected wave heights.**
We expect high temperatures from 84° to 89°. Northeast winds are expected from 15 to 20 mph with higher gusts. Partly sunny skies are forecasted for windward areas with scattered showers. For leeward areas we expect a mostly clear morning and afternoon clouds with isolated showers.
UV index at 13 (“extreme” exposure level)
For leeward areas, partly cloudy skies are expected tonight with clearing as the night goes on. Windward spots are partly cloudy with scattered showers. Northeast winds are forecasted from 15 to 20 mph. Low temperatures from 73° to 78° are expected.
A high to the northeast and a series of weak tropical disturbances to the south will keep locally breezy trade winds blowing through early next week. The trades will bring some showers to windward areas, mostly during nights and mornings. Leeward areas will remain mostly dry except for afternoon showers over the Kona slopes. A tropical disturbance may pass northeast of the area by the middle of next week, bringing muggy weather.
Tropical Storm Guillermo Update
The forecast is uncertain after the coming weekend. A tropical disturbance about 2150 miles east southeast of Hilo is expected to move into the central Pacific over the weekend. The weather over the main Hawaiian islands next week will depend on the progress of this tropical system. Weather models currently show the system passing northeast of the Hawaiian islands through the middle of next week. That would likely bring light winds and muggy weather to the islands but it’s still too soon to know exactly what the disturbance will do. The National Hurricane Center in Miami will be issuing forecasts on the system for the next few days. If the system does move into the central Pacific, the Central Pacific Hurricane Center in Honolulu will take over the forecasts at that time.
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