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Hawaii Island Weather Update for December 22nd, 2019

Notice Level: Advisory (Update Needed)

The Parts of Hawaii Island remains under a High Wind Advisory until 6:00 pm Sunday evening (December 22nd). Districts under the advisory include North and South Kohala, Hamakua, North and South Hilo, Puna, and Ka'u,

Winds of 20 to 30 mph with stronger gusts up to 50 MPH in some areas are expected through this evening (December 22nd).

Special Marine Statement has been issued for Hawaii Island Coastlines as unusually high tides peaking this week may cause coastal flooding. Based on the latest tide forecast and charts, Highest tides peaking at 2.4 feet in Kailua-Kona, and Mahukona in Kohala, 2.6 feet at Kawaihae Harbor, and 3.0 feet at Honuapo in Ka'u and in Hilo Bay is expected on Christmas Day will continue into the last weekend of 2019.

No Road or Park Closures or any outages (power, water, telephone, cable) have been reported related to the weather conditions. Should any arise, we will provide an update on our page as it becomes available.

Everyone is asked to secure loose objects such as outdoor furniture, decorations, trash cans, etc. and have emergency supplies on hand in the event power or water outages should occur.

WIND ADVISORY NOW IN EFFECT UNTIL 6 PM HST THIS EVENING * WHAT...East winds 20 to 30 mph with gusts up to 50 mph. * WHERE...All of Maui County, except for the Haleakala Summit, as well as the northern and southern portions of the Big Island, including locations over and downwind of the Kohala Mountains as well as areas near South Point. The strongest winds will occur over and immediately downwind of the mountains, and where the terrain funnels the wind most effectively. * WHEN...Until 6 PM HST this evening. * IMPACTS...Winds this strong are capable of downing trees, tents and other temporary structures, and causing power outages. Motorists should use caution when driving high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS A Wind Advisory means that sustained winds of at least 30 mph, or gusts of at least 50 mph, are expected. Motorists should use extra caution.


COASTAL FLOODING LIKELY THIS WEEK Impacts may include inundation of low-lying roads, docks, boat ramps, and other coastal infrastructure, and flooding of beaches that are normally dry. There will be unusually high water levels during peak high tides this week. Breezy south winds Tuesday and Wednesday may increase the wave run-up along south-facing shores. The threat of coastal flooding will diminish next weekend as the peak daily tides subside. Peak high tides for Honolulu will be at 228 AM Monday, 308 AM Tuesday, 347 AM Wednesday, 425 AM Christmas Day, and 503 AM Friday. Water levels at the Honolulu tide gauge are running 5 to 10 inches above predicted levels. The height and time of the peak high tides varies from place to place. See the NOAA Tides and Currents web site for details.

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