Tropical Storm Darby affected the island chain with high surf, gusty winds, and heavy downpours; from the Big Island to Kauai. Some of the precipitation resulted in flash flooding.
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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.
Tropical Storm Darby affected the island chain with high surf, gusty winds, and heavy downpours; from the Big Island to Kauai. Some of the precipitation resulted in flash flooding. There were power outages, and downed trees and power poles in parts of the Big Island and Oahu. However, there were no reports of significant injuries. The cost of damages was not available.
Surf heights varied around the island chain, though affected east-facing shores were on Kauai, Oahu, Molokai, Maui, and the Big Island of Hawaii. Most surf was in the 8 to 12-foot range, with some Big Island beaches seeing heights as high as 20 feet on the 22nd and 23rd.
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 Jul 21, 4:06 AM HST, 1 hour 24 minutes earlier.
Area Forecast Discussion National Weather Service Honolulu HI 406 AM HST THU JUL 21 2016 .SYNOPSIS... High pressure to the north of the islands will maintain trade winds across the state today and Friday. Expect showers to remain focused over windward and mauka areas. Tropical Storm Darby is is currently expected to approach the state from the east this weekend. Impacts from Darby will be highly dependent on its track and intensity. && .DISCUSSION... Little change in the forecast philosophy this morning. High pressure to the north of the islands will maintain trades over the region today and into Friday. Showers will be focused over windward and mauka areas, with some showers reaching leeward areas at times. Some minor tweaks have been made to the forecast for the first 36 hours or so, but the general forecast remains the same. Tropical Storm Darby remains east of the islands this morning, and continues on track towards the islands. The impacts on our local weather from Friday night through the weekend are very dependent on the track and intensity of Darby. Please refer to the latest products issued by the Central Pacific Hurricane Center (CPHC) for details on the forecast of Darby. Based on the current forecast, the east end of the state could experience the effects of Darby as early as Friday night, and continuing into the weekend, in the form of increased rainfall, and stronger winds. The probabilities of tropical storm force winds reaching the Big Island and Maui have increased overnight based on the CPHC forecast track. Have added some locally heavy rainfall wording to the forecast for these areas Friday night through Sunday. If, and how much these impacts would spread to the remaining islands is still heavily dependent on the future forecasts of Darby. && .AVIATION... High pressure north of the state and Tropical Storm Darby to the east, will keep a breezy northeast trade wind flow in place through tonight. Clouds and showers will favor windward and mauka areas, with some brief MVFR cigs/vsbys expected in passing showers. AIRMET Sierra is in effect for portions of Molokai Maui and the Big Island due to mountain obscuration. Conditions should improve later this morning. AIRMET Tango is in effect for low level turbulence south thru west of the mountains on all islands. Conditions are expected to continue through tonight. && .MARINE... A small craft advisory remains posted for the typically windy waters around Maui County and The Big Island with strong high pressure to our north. Expect windy conditions for the next few days. Swells from Darby are beginning to reach the islands and are expected to continue to build through the end of the week, along with locally generated wind waves. Depending on the track and intensity of Darby, winds and seas may increase over the eastern coastal waters this weekend. For more details on Darby, please refer to the latest products issued by the Central Pacific Hurricane Center. Swells from Tropical Storm Darby will cause an increase in surf along east facing shores through the weekend. Advisory level surf is likely over the eastern islands later today or tonight, and expected to gradually spread up the island chain Thursday night and Friday. Depending on the strength and intensity of Darby, surf heights could approach warning levels during the peak of the swell. Otherwise there will be a series of small southerly swells through the rest of the week and on through the weekend. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 PM HST this evening for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. && M Ballard
The Kamuela/Kohala Apt radar (PHKM), 96 km away, was scanning. The volume nearest the first event began at 15:27 UTC.
9 high surf, 4 heavy rain, 4 flash flood. Local standard time, as filed.
Debris flow across the Hana Highway between mile markers 6 and 7 in East Maui closed the roadway in both directions for a time. The rain was in advance of Tropical Storm Darby.
Flooding across Kapuna Road near Honokaa on the windward side of the Big Island closed the roadway. The rain was associated with Tropical Storm Darby.
Heavy rain from Tropical Storm Darby closed Highway 11 in the Kau District on the Big Island near Kawa Flats.
Heavy rain from Tropical Storm Darby closed Piilani Highway in the southern part of East Maui between mile markers 25 and 38 at Pahihi Gulch.
H-1 Westbound at Liliha Street on Oahu closed due to flooding waters and stalled vehicles. Precipitation was associated with Tropical Storm Darby.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Hawaii in 2016Every state in 2016This day in weather historyWarnings in Hawaii, July 2016
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: 643077, 643069, 643070, 643071, 643072, 643073, 643074, 643075, 643076, 643068, 643078, 643079, 643080, 643081, 643082, 643083, 643084.