Hurricane Watch issued September 23 at 10:44PM HST by NWS Honolulu HI

* LOCATIONS AFFECTED
- Naalehu
- Pahala

* WIND
- LATEST LOCAL FORECAST: Equivalent Tropical Storm force wind
- Peak Wind Forecast: 35-45 mph with gusts to 60 mph
- Window for Tropical Storm force winds: Friday afternoon
until early Sunday morning

- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 74
to 110 mph
- The wind threat has remained nearly steady from the
previous assessment.
- PLAN: Plan for life-threatening wind of equivalent CAT 1 or
2 hurricane force.
- PREPARE: Efforts to protect life and property should now be
rigorously underway. Prepare for considerable wind damage.
- ACT: Act now to complete preparations before the wind
becomes hazardous.

- POTENTIAL IMPACTS: Extensive
- Considerable roof damage to sturdy buildings, with some
having window, door, and garage door failures leading to
structural damage. Mobile homes severely damaged, with some
destroyed. Damage accentuated by airborne projectiles.
Locations may be uninhabitable for weeks.
- Many large trees snapped or uprooted along with fences and
roadway signs blown over.
- Some roads impassable from large debris, and more within
urban or heavily wooded places. Several bridges, causeways,
and access routes impassable.
- Large areas with power and communications outages.

* STORM SURGE
- LATEST LOCAL FORECAST: Localized storm surge possible
- Peak Storm Surge Inundation: The potential for 1-3 feet
above ground somewhere within surge prone areas
- Window of concern: Begins early Friday morning

- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm
surge flooding greater than 1 foot above ground
- The storm surge threat has remained nearly steady from the
previous assessment.
- PLAN: Plan for storm surge flooding greater than 1 foot
above ground.
- PREPARE: Complete preparations for storm surge flooding,
especially in low-lying vulnerable areas, before conditions
become unsafe.
- ACT: Leave immediately if evacuation orders are given for
your area.

- POTENTIAL IMPACTS: Limited
- Localized inundation with storm surge flooding mainly along
immediate shorelines and in low-lying spots, or in areas
farther inland near where higher surge waters move ashore.
- Sections of near-shore roads and parking lots become
overspread with surge water. Driving conditions dangerous
in places where surge water covers the road.
- Moderate beach erosion. Heavy surf also breaching dunes,
mainly in usually vulnerable locations. Strong rip currents.
- Minor to locally moderate damage to marinas, docks,
boardwalks, and piers. A few small craft broken away from
moorings.

* FLOODING RAIN
- LATEST LOCAL FORECAST: Flood Watch is in effect
- Peak Rainfall Amounts: Additional 18-24 inches, with
locally higher amounts

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

- POTENTIAL IMPACTS: Devastating to Catastrophic
- Extreme rainfall flooding may prompt numerous evacuations
and rescues.
- Rivers and tributaries may overwhelmingly overflow their
banks in many places with deep moving water. Small streams,
creeks, canals, arroyos, and ditches may become raging
rivers. In mountain areas, deadly runoff may rage down
valleys while increasing susceptibility to rockslides and
mudslides. Flood control systems and barriers may become
stressed.
- Flood waters can enter numerous structures within multiple
communities, some structures becoming uninhabitable or
washed away. Numerous places where flood waters may cover
escape routes. Streets and parking lots become rivers of
raging water with underpasses submerged. Driving conditions
become very dangerous. Numerous road and bridge closures
with some weakened or washed out.

* 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 include the potential for a
few tornadoes.
- PREPARE: If your shelter is particularly vulnerable to
tornadoes, prepare to relocate to safe shelter before
hazardous weather arrives.
- ACT: If a tornado warning is issued, be ready to shelter
quickly.

- 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