More heavy rainfall and isolated thunderstorms developed over parts of the island chain as Lane moved away from the state to the west. Some of the precipitation caused flash flooding on Kauai, the Big Island, and Oahu.
Every event with a place to put it. 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.
More heavy rainfall and isolated thunderstorms developed over parts of the island chain as Lane moved away from the state to the west. Some of the precipitation caused flash flooding on Kauai, the Big Island, and Oahu. One man died on Kauai on the 28th when he jumped into a swollen stream to try to save a dog. The cost of damages was not available.
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 Aug 27, 11:59 AM HST, 34 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Honolulu HI 1159 AM HST Mon Aug 27 2018 .UPDATE... Added heavy rain and a slight chance of thunderstorms for Kauai and surrounding waters through the afternoon based on the current radar and satellite trends. && .SYNOPSIS... A trailing band of deep tropical moisture from Tropical Storm Lane, will keep windward areas showery through Tuesday, while leeward areas see a few showers spill over from time to time. Drier, more typical trade wind weather is expected to move in from east to west across the state on Tuesday night, with quite comfortable weather expected Wednesday through Friday with noticeably lower humidity levels. A more showery trade wind pattern may return next weekend. && .DISCUSSION... Tropical Storm Lane is located around 500 miles west southwest of Kauai, while a 1037 mb high is centered around 1700 miles north- northeast of Honolulu. The resulting gradient is driving moderate trade winds across the island chain this morning. Satellite imagery shows cloudy skies across Kauai and Oahu this morning with more breaks in the cloud cover over Maui County and the Big Island. Radar shows most of the rainfall passing over Kauai and waters to the west of the state. Lane is forecast to track westward today and tonight, before making a turn toward the north Tuesday through the end of the work week. Meanwhile, high pressure will remain in place well to the north of the state through next weekend, keeping trade winds blowing across the island chain. Moderate trade winds are expected through tonight, with breezy trades then expected Tuesday through Thursday. The trades are then expected to back off Friday through the upcoming weekend as surface troughing approaches or moves over the state. As for sensible weather details, a deep plume of tropical moisture lagging behind Lane with precipitable water values between 1.8 and 2.2 inches will move through the islands through Tuesday, keeping windward areas showery, while leeward areas see a few showers spilling over from time to time. A transition back to a drier and more typical summertime trade wind pattern is expected from east to west across the state on Tuesday night, and this should hold through the remainder of the work week. We could see an increase in trade showers over the upcoming weekend as a weak surface trough and associated deeper moisture move in from the east. && .AVIATION... Deep tropical moisture will linger over the Hawaiian Islands through Tuesday. Reduced ceilings and visibilities in passing showers are expected all areas, especially windward slopes and coasts. Shower activity may become increasingly active over the western third of the state tonight. AIRMET Sierra for mountain obscuration will persist for all principal islands. AIRMET Tango remains in effect for low level turbulence over and south through west of mountains. Trade winds will remain breezy through Tuesday. AIRMET Tango will likely remain in effect for the next 24 hours. && .MARINE... Lane continues on its westward course, further away from the islands. However, Lane is still close enough to maintain a threat for thunderstorms over the far southwest offshore waters today. Otherwise, locally strong trades will persist through at least Wednesday as high pressure maintains a tight gradient over the islands. Thus, the Small Craft Advisory (SCA) remains in effect for the waters around Maui and south of the Big Island through Wednesday. Tropical Cyclone Miriam is forecast to enter the Central Pacific Hurricane Center area of responsibility around Wednesday afternoon. Miriam's track takes the storm north once it crosses 140W longitude. The strength the trades after Thursday depends on Miriam's eventual track, however, a surface trough may form just east of the Big Island, lightening the winds in the process. Surf will be small through the upcoming weekend, but small swells from the northwest, south, and southwest will keep the surf from becoming flat. The largest of the south swell is expected over the upcoming weekend. && .HFO WATCHES/WARNINGS/ADVISORIES... Small Craft Advisory until 6 PM HST Wednesday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters. && UPDATE/DISCUSSION...Foster AVIATION...Bedal MARINE...TS
The South Kauai radar (PHKI), 36 km away, was scanning. The volume nearest the first event began at 22:30 UTC.
5 heavy rain, 4 flash flood. Local standard time, as filed.
Kuhio Highway was closed near the Hanalei Bridge because of flooding over the roadway in the northern part of Kauai.
Hawaii County Civil Defense reported that Old Saddle Road was closed between Waikii and the Daniel K Inouye Highway due to heavy runoff.
Flooding waters on Kuhio Highway closed the roadway near the Hanalei Bridge in the northern part of Kauai. One fatality occurred when a man jumped into the swollen Waikomo Stream to try to save a dog.
Likelike Highway on Oahu was closed between Valley View Drive and Nalanieha Street in town-bound lanes due to flooding and debris on the roadway. Kamehameha Highway was also closed in the west-bound lane near Middle Street because of the Kalihi Stream overflowing. And later on in the morning, Likelike Highway was closed in both directions on the Kaneohe side of the tunnel due to debris on the roadway.
Heavy rain apparently loosened trees from the soil that fell and blocked the 3300 block of Tantalus Drive in both directions on Oahu.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Flash Flood, Kauai | 2018-08-28 | 30 | Male | In Water | Direct |
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, August 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: 773894, 773895, 773896, 773897, 773906, 773898, 773899, 773910, 773907.