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Severe · Tropical Storm WarningActive alert

Tropical Storm Warning issued September 7 at 7:54AM HST by NWS Honolulu

Affecting Waianae Mountains

In effect until: Sep 8, 2026, 2:00 AM

Waianae Mountains

Likely impact; effects through 2:00 AM.

Secure your home and stay indoors. Have an emergency kit ready and monitor official updates.

Read the original bulletin (official text)
A Tropical Storm Warning means tropical storm-force winds are
expected somewhere within this area within the next 36 hours

* LOCATIONS AFFECTED
- Makakilo

* WIND
- LATEST LOCAL FORECAST: Equivalent Tropical Storm force wind
- Peak Wind Forecast: 35-45 mph with gusts to 55 mph
- Window for Tropical Storm force winds: early this afternoon
until early Tuesday morning

- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 39
to 57 mph
- The wind threat has remained nearly steady from the
previous assessment.
- PLAN: Plan for hazardous wind of equivalent tropical storm
force.
- PREPARE: Last minute efforts to protect property should now
be complete. The area remains subject to limited wind
damage.
- ACT: Now is the time to shelter from hazardous wind.

- POTENTIAL IMPACTS: Unfolding
- Potential impacts from the main wind event are unfolding.

* FLOODING RAIN
- LATEST LOCAL FORECAST: Flood Watch is in effect
- Peak Rainfall Amounts: Additional 3-6 inches, with locally
higher amounts

- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for
moderate flooding rain
- The flooding rain threat has remained nearly steady from
the previous assessment.
- PLAN: Emergency plans should include the potential for
moderate flooding from heavy rain. Evacuations and rescues
are possible.
- PREPARE: Consider protective actions if you are in an area
vulnerable to flooding.
- ACT: Heed any flood watches and warnings. Failure to take
action may result in serious injury or loss of life.

- POTENTIAL IMPACTS: Significant
- Moderate rainfall flooding may prompt several evacuations
and rescues.
- Rivers and tributaries may quickly become swollen with
swifter currents and overspill their banks in a few places,
especially in usually vulnerable spots. Small streams,
creeks, canals, arroyos, and ditches overflow.
- Flood waters can enter some structures or weaken
foundations. Several places may experience expanded areas
of rapid inundation at underpasses, low-lying spots, and
poor drainage areas. Some streets and parking lots take on
moving water as storm drains and retention ponds overflow.
Driving conditions become hazardous. Some road and bridge
closures.

* TORNADO
- LATEST LOCAL FORECAST:
- Situation is somewhat favorable for tornadoes

- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few
tornadoes
- The tornado threat has remained nearly steady from the
previous assessment.
- PLAN: Emergency plans should continue to include possible
tornadoes.
- PREPARE: Stay within your shelter keeping informed of the
latest tornado situation.
- ACT: Move quickly to the safest place within your shelter
if a tornado warning is issued.

- POTENTIAL IMPACTS: Limited
- The occurrence of isolated tornadoes can hinder the
execution of emergency plans during tropical events.
- A few places may experience tornado damage, along with
power and communications disruptions.
- Locations could realize roofs peeled off buildings,
chimneys toppled, mobile homes pushed off foundations or
overturned, large tree tops and branches snapped off,
shallow-rooted trees knocked over, moving vehicles blown
off roads, and small boats pulled from moorings.

* FOR MORE INFORMATION:
- https://www.weather.gov/hfo
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™