High Surf, Niihau
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Niihau forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 22.011, -159.705 (the zone’s center; the record gives no point)
High Surf in Hawaii, April 21 to 22, 2017
A swell from a strong low far northwest of the Aloha State generated surf of 15 to 25 feet along the north- and west-facing shores of Niihau, Kauai, and Molokai; and the north-facing shores of Oahu and Maui; and 10 to 18 feet along the west-facing shores of Oahu. No serious property damage or injuries were reported.
Where it happened
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 12
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.
What happened
The episode as NWS HFO wrote it up.
A swell from a strong low far northwest of the Aloha State generated surf of 15 to 25 feet along the north- and west-facing shores of Niihau, Kauai, and Molokai; and the north-facing shores of Oahu and Maui; and 10 to 18 feet along the west-facing shores of Oahu. No serious property damage or injuries were reported.
The radar
The national radar mosaic for the moment the first event began.
Event by event
12 high surf. Local standard time, as filed.
High Surf, Kauai Windward
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Kauai Windward forecast zone
- Reported by
- Trained Spotter
High Surf, Kauai Leeward
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Kauai Leeward forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 22.011, -159.705 (the zone’s center; the record gives no point)
High Surf, Waianae Coast
- When
- April 21, 3:00 AM HST to 3:00 PM HST
- Where
- Waianae Coast forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 21.455, -157.961 (the zone’s center; the record gives no point)
High Surf, Oahu North Shore
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Oahu North Shore forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 21.455, -157.961 (the zone’s center; the record gives no point)
High Surf, Oahu Koolau
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Oahu Koolau forecast zone
- Reported by
- Trained Spotter
High Surf, Olomana
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Olomana forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 21.455, -157.961 (the zone’s center; the record gives no point)
High Surf, Molokai Windward
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Molokai Windward forecast zone
- Reported by
- Trained Spotter
High Surf, Molokai Leeward
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Molokai Leeward forecast zone
- Reported by
- Trained Spotter
High Surf, Maui Windward West
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Maui Windward West forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 21.027, -156.788 (the zone’s center; the record gives no point)
High Surf, Maui Central Valley
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Maui Central Valley forecast zone
- Reported by
- Trained Spotter
High Surf, Windward Haleakala
- When
- April 21, 3:00 AM HST to April 22, 3:00 AM HST
- Where
- Windward Haleakala forecast zone
- Reported by
- Trained Spotter
What these are
- High Surf
- Large waves breaking on the shore that caused damage, erosion or casualties.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Hail in Texas, April 21, 2017
- Wildfire in Florida, April 21 to 22, 2017
- Flash Flooding and Flooding in Missouri, April 21 to 22, 2017
- Hail and Damaging Winds in Virginia, April 21, 2017
- Flash Flooding and Hail in Oklahoma, April 21, 2017
- Hail and Damaging Winds in Maryland, April 21, 2017
- Marine Thunderstorm Winds in North Atlantic Coastal Waters, April 21, 2017
- Flash Flooding and Damaging Winds in Arkansas, April 21, 2017
- Hail in Texas, April 21, 2017
- Flood and Hail in Tennessee, April 21, 2017
- Damaging Winds in Virginia, April 21, 2017
- Hail and Damaging Winds in Oklahoma, April 21, 2017
More
Every storm in Hawaii in 2017Every state in 2017This day in weather historyWarnings in Hawaii, April 2017
Sources
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 2026-10-01. Each event’s entry at NCEI: 684234, 684235, 684236, 684237, 684238, 684239, 684240, 684241, 684242, 684243, 684244, 684245.