Flood Watch, Heavy Rain Possible Today
Alerts (as of 1:00 a.m.)
Flash Flood Watch: Maui and the Big Island through Tuesday afternoon. The highest chance of flooding will be over windward and interior areas.
Wind Advisory: Northeast winds up to 20 to 35 mph with gusts up to 50 mph through early Monday morning.
High Surf Advisory: North and east facing shores of Big Island through 6 p.m. Tuesday.
Small Craft Advisory: Through 6 p.m. Monday for east winds up to 30 knots and seas from 8 to 14 feet.
Gale Warning: Posted through Monday at 6 a.m.
Winter Storm Watch: Heavy snow and accumulations up to 12 inches are possible. The snow might mix with or change to rain during the day Tuesday. Big Island summits above 12,000 feet from Monday morning through Tuesday afternoon.
Marine Weather Statement: A north swell is peaking today. This swell could produce surges in north facing harbors like Hilo and could produce large breaking waves near channel and harbor entrances. Mariners are asked to exercise extreme caution.
**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.**
The trades will ease very slowly this week, but breezy conditions are expected to continue. Moisture combined with a weakening disturbance is forecast to bring heavy rainfall to Maui and the Big Island over the next couple of days. An even stronger disturbance is expected to develop near the state late this week, possibly bringing stormy weather to all islands.
We expect northeast winds up to 15 to 25 mph with higher gusts. Mostly cloudy skies are forecast with showers likely in windward spots and upslope in leeward areas. Rain heavy at times with a chance of thunderstorms and heavy snow possible above 12,000 feet. Temperatures up to 79° to 84°.
UV index at 3 (“moderate” exposure level)
Mostly cloudy skies with showers likely and possible heavy snow at highest elevations. Low temperatures from 67° to 72°. Winds are expected to be northeast up to 15 to 25 mph with higher gusts.
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