Winds from the northeast gusted above 70 mph over the Big Island summits of Mauna Kea and Mauna Loa. There were no reports of serious property damage or injuries.
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The episode as NWS HFO wrote it up.
Winds from the northeast gusted above 70 mph over the Big Island summits of Mauna Kea and Mauna Loa. There were no reports of serious property damage or injuries.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Honolulu, HI wrote its last area forecast discussion before the first event at Jan 5, 9:18 AM HST, 41 minutes earlier.
Area Forecast Discussion National Weather Service Honolulu HI 918 AM HST Sun Jan 5 2020 .SYNOPSIS... A rather breezy to locally windy trade wind weather pattern is in store for the this week due to high pressure north of the area. Moisture embedded in the trades will provide for passing windward and mauka showers over the next few days with the trades sufficiently strong enough to blow some brief passing showers over to leeward areas at times. A wetter trade wind pattern is setting up for the second half of the week as an upper low moves over the area from the east. && .DISCUSSION... A 1040 MB high is centered far northeast of the state. This places the islands in a breezy to locally windy trade wind environment. Meanwhile an upper level low is centered a few hundred miles east of the Big Island. Moisture embedded in the trades is providing for some passing showers over windward and mauka areas with the trades sufficiently strong enough to blow some of these showers over to leeward areas at times. We expect this general weather pattern to persist through the day. Surface observations as well as model guidance indicates rather strong winds will occur for the next few days over the Big Island summits. Thus a Wind Advisory has been issued and and is expected to remain in effect through the day Tuesday. The surface high will drift slowly westward over the next few days keeping the area in a breezy to locally windy trade wind regime into the middle of the week. Clouds and passing showers will continue to favor windward and mauka areas with some brief passing showers also possible over some leeward locations. The upper low is forecast to remain stationary for a few days then gradually drift westward closer to the state by Wednesday or Thursday. This will cause the airmass to become less stable. This along with an expected increase in low level moisture moving in the trades will cause for an increase in shower activity especially over windward and mauka areas. Thus a rather wet and windy trade wind pattern is shaping up for later this week and on into next weekend. && .AVIATION... Strong high pressure northeast of Hawaii will continue to produce breezy trade winds across the state for the next several days. AIRMET Tango for low level turbulence remains in effect and will continue. Clouds and showers will favor north and east facing slopes and coasts, with some spillover showers leeward at times. AIRMET Sierra for mountain obscuration will remain in effect for windward areas of Oahu, Maui, and the Big Island into this afternoon. Conditions are expected to improve later this afternoon as moisture in the area decreases. && .MARINE... Strong to gale-force easterly trades are expected through the week as strong high pressure remains anchored north to northeast of the state. Gales are expected in the typical windier areas, especially the Pailolo and Alenuihaha Channels where a Gale Watch is in effect beginning tonight. Seas exposed to the trades will respond and hold around the advisory level (10 ft) through Tuesday. The gradient between high pressure (1040 mb) to the northeast and a weak surface trough forecast to develop east of the state will tighten over a large area through the first half of the week. Wave model guidance reflects this and depicts seas building locally into the 10 to 15 ft range Tuesday through the end of the week as the surface trough approaches and moves into the area. Surf along exposed east facing shores will remain rough, likely near or just below the advisory level through Monday. An upward trend is expected Tuesday through midweek as the previously discussed area of strong winds and large seas moves into the area. Although confidence remains low this far out, given the wave model differences, warning- level surf can't be ruled out between Wednesday and Friday. A combination of large seas, potentially warning-level surf, strong onshore winds and water levels running around half of a foot above predicted will support significant beach erosion and wave runup over areas that typically remain dry along east facing shores, mainly through the second half of the week, when peak high tides and surf will be higher. Surf along north facing shores will trend down today as the small north swell eases. A small mid-period northwest swell will fill in by Monday, then hold through Monday night. A small long- period northwest swell is expected Tuesday through midweek. An upward trend is expected through the second half of the week as a broad storm-force low sets up over the far northwest Pacific (near Kamchatka Peninsula) Monday through Tuesday. Surf may near or reach advisory levels for north and west facing shores Friday night into Saturday if this scenario evolves. Surf along south facing shores will remain nearly flat through Monday. A couple of background south to southwest swells expected Tuesday and late Friday through next weekend should be enough to keep the surf above flat levels. && .HFO WATCHES/WARNINGS/ADVISORIES... Wind Advisory until 6 PM HST Tuesday for Big Island Summits. Small Craft Advisory until 6 PM HST Thursday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel- Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maui County Leeward Waters-Maalaea Bay- Big Island Windward Waters-Big Island Leeward Waters-Big Island Southeast Waters. Gale Watch from 6 PM HST this evening through Tuesday afternoon for Pailolo Channel-Alenuihaha Channel. Small Craft Advisory until 6 PM HST this evening for Pailolo Channel-Alenuihaha Channel. && DISCUSSION...Burke AVIATION...TS MARINE...Kino
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2020Every state in 2020This day in weather historyWarnings in Hawaii, January 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 867427.