Winds from the southwest exceeded high wind criteria over the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. There were no reports of serious property damage or injuries.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HFO wrote it up.
Winds from the southwest exceeded high wind criteria over the summits of Mauna Kea and Mauna Loa on the Big Island of Hawaii. 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 Apr 27, 9:53 AM HST, 2 hours 46 minutes earlier.
Area Forecast Discussion National Weather Service Honolulu HI 953 AM HST Fri Apr 27 2018 .SYNOPSIS... A developing front will move down the island chain today through Saturday, then stall near the Big Island Saturday night and Sunday. Clouds and passing showers can be expected along and ahead of the front as it moves across the area. A cooler and drier airmass will fill in behind the front. Moisture associated with the front may linger over The Big Island into early next week. && .DISCUSSION... Radar shows an area of showers moving up over Molokai, Lanai and eastern Oahu. Also a few showers can be seen just west of Kauai. The rest of the state is generally dry at the present time. A rather strong area of low pressure both at the surface and aloft can be seen spinning several hundred miles north of the state. A cold front is developing from the low and extends south to a position just west of Kauai. The front will move across Kauai today accompanied by some light to moderate rainfall. The front is forecast to reach Oahu later this afternoon and evening accompanied by passing showers. The front will then move across Maui County tonight and early Saturday then reach The Big Island sometime on Saturday. Most of the showers will be light to moderate in intensity but a few heavy showers are possible with ahead and along with the frontal passage over Oahu and Maui County. Thunderstorms are not expected as the best upper level dynamics remain north of the state. Behind the front, drier northerly flow will develop with a cooler airmass filling in. However moisture associated with the front may linger over The Big Island keeping things rather wet there into early next week. Some snow is possible over the summits as well. The low will remain north of the area into early next week. Another weak front is forecast to move into Kauai Sunday night and Monday with some light showers expected with its passage especially along north facing slopes. This front is forecast to weaken significantly and dissipate by the time it reaches Oahu. Northerly flow will continue through Monday night with light trade winds expected to return on Tuesday. As we head into the second half of next week, a strong upper level short wave trough is forecast to dig down northwest of the state. Models indicate a wetter weather pattern setting up as moisture gets drawn up from the south as well as moisture from the old front moving in from the east. Details on timing, location and rainfall intensities will need to be fine tuned as we get closer to the event. && .AVIATION... Most of the instability seems to be focused on the middle islands of Molokai and Lanai this morning. This is where we are observing lower ceilings and the best chance for rain this morning. This will continue into the afternoon and evening hours. AIRMET Sierra is in effect for mountain obscurations for Molokai and Lanai. This AIRMET may need to be extended to portions of Maui and possibly Oahu later in the day if shower development is significant enough, but with the lack of sunshine, this may not be necessary. && .MARINE... A developing low north of the islands will bring a front through the island chain over the next couple of days. Heavier showers will occur near Oahu and Maui County today through tonight. The front is expected to stall near the Big Island Saturday night and Sunday, with moisture lingering there during the first part of next week. Northerly winds behind the front will approach SCA criteria as winds accelerate around the terrain. The low will send a mix of swells toward the islands this weekend into next week, with associated seas rising above 10 feet in most zones late Sunday and into Monday. A moderate, long-period NNW swell will peak today with surf heights remaining below advisory levels. The aforementioned low developing north of the islands will remain in place until early next week, but its evolution will dictate the amount of swell/surf that arrives in the islands and remains somewhat uncertain. Current indications are that a fairly significant, but poorly organized, swell will produce advisory-level surf along exposed north and west facing shores, with the peak of the swell around Sunday. Several pulses of small south swells are expected over the next week or so, with a peak in swell energy Sunday. Rough and choppy surf along east facing shores will diminish as the trades weaken. See the latest Oahu Surf Discussion (SRDHFO) for additional details on surf and swell. && .HFO WATCHES/WARNINGS/ADVISORIES... None. && Synopsis/Discussion...Burke Aviation...Chevalier Marine...TS
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 2018Every state in 2018This day in weather historyWarnings in Hawaii, April 2018
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: 743324.