Alert archive / Hawaii / Flash Flood Warnings in 2026

Flash Flood Warning 34, NWS Honolulu, HI

April 9, 2026Kauai County, Hawaii

NWS Honolulu, HI issued this flash flood warning at Apr 9, 2026, 4:44 PM HST for Kauai County, Hawaii. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 9, 2026, 4:44 PM HST (02:44 UTC)
Expired: Apr 9, 2026, 7:45 PM HST
In force: 3 hr
Issued by: NWS Honolulu, HI
Area: Storm-based polygon
Flood severity: None

County Kauai County, HI

The radar

The South Kauai radar (PHKI), 20 km from the middle of the area, began a volume at 02:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Apr 9, 1:01 PM HST, 3 hours 43 minutes earlier.

Area forecast discussion, Apr 9, 1:01 PM HST, 3 hours 43 minutes before

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In the hours before

Special weather statement, Apr 9, 11:19 AM HST, 5 hours 25 minutes before

Special Weather Statement
National Weather Service Honolulu HI
1119 AM HST Thu Apr 9 2026

HIZ023-026>028-051>054-100030-
Kona-Kohala-Big Island Interior-Big Island Summits-
Big Island South-Big Island Southeast-Big Island East-
Big Island North-
1119 AM HST Thu Apr 9 2026

...KILAUEA EPISODE 44 LAVA FOUNTAINING BEGAN TODAY AT 1110 AM
HST...

WHAT...Kilauea is undergoing an episodic fountaining eruption
within the summit caldera. Fountaining episodes typically last
less than 12 hours but ash can remain in the air longer depending
on wind and weather conditions.

IMPACTS...Varying levels of ash, Pele's hair, and other
lightweight tephra may fall downwind of the eruption. In the
current weather pattern, "downwind" will be to the north and
northeast of the summit, including the communities of Volcano and
Mountain View. Smaller particles can travel farther from the
eruption site and may affect communities at greater distances.

PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you live downwind of the Kilauea summit, or plan to visit the
summit area, stay informed about current volcanic activity and
weather conditions. Winds from the south mean that tephra could
fall in areas of Hawaii Volcanoes National Park, on Highway 11
nearby, and in communities near the Kilauea summit region.

Consider covering and temporarily disconnecting your water
catchment system. Be prepared with eye and respiratory protection
and be ready to shelter in place if necessarily.

Follow all guidance from the National Park Service and the County
of Hawaii. Be aware that road or park closures may occur.

Areas farther downwind to the north and northeast of the Kilauea
summit, including Puna, and North and South Hilo, and Hamakua
Districts, may experience ash and Pele's hair.

This statement will be issued daily and updated as needed.

&&

For more information on the status of Kilauea Volcano, please see
https://volcanoes.usgs.gov/volcanoes/kilauea/volcano-updates

For health and safety recommendations, please visit the Hawaii
Interagency Vog Information Dashboard at https://vog.ivhhn.org

Submit your reports and photos of ashfall from eruptions to the USGS
Hawaiian Volcano Observatory at https://hawaiiash.science/report_form

The office that day

Everything else NWS Honolulu, HI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 4:08 PM HST	Areal Flood Advisory	HFO	Kauai	3 hr
Apr 9, 6:40 PM HST	Flash Flood Warning	HFO	Kauai	6 hr
Apr 10, 3:42 AM HST	Areal Flood Advisory	HFO	Kauai	6 hr
Apr 10, 8:32 AM HST	Areal Flood Advisory	HFO	Honolulu	3 hr
Apr 10, 11:04 AM HST	Flash Flood Warning	HFO	Honolulu	6 hr

Nearby

Flash Flood Warnings in Hawaii, 2026 Every flash flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.