[Tropical] Hurricane Local Statement

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Hurricane Olivia Local Statement Advisory Number 39
National Weather Service Honolulu HI  EP172018
1136 PM HST Sun Sep 9 2018

This product covers the Hawaiian islands

**HURRICANE OLIVIA INTENSIFIES AS IT TRACKS TOWARD HAWAII**

NEW INFORMATION
---------------

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Watch is in effect for Big Island Interior,
      Big Island North and East, Big Island Summits, Central Oahu,
      Haleakala Summit, Kahoolawe, Kohala, Kona, Lanai Makai, Lanai
      Mauka, Leeward Haleakala, Maui Central Valley, Maui Leeward
      West, Maui Windward West, Molokai Leeward, Molokai Windward,
      Oahu Koolau, Oahu North Shore, Oahu South Shore, Olomana, South
      Big Island, Waianae Coast, Waianae Mountains, and Windward
      Haleakala

* STORM INFORMATION:
    - About 705 miles east of Honolulu or about 545 miles
      east-northeast of Hilo
    - 21.7N 146.9W
    - Storm Intensity 85 mph
    - Movement West or 270 degrees at 9 mph

SITUATION OVERVIEW
------------------

Olivia is expected to bring strong winds, heavy rainfall, and high
surf to parts of the state. Damaging tropical storm force winds may
begin as early as Tuesday afternoon across the eastern end of the
island chain, and hurricane force wind gusts are possible as Olivia
moves across the state sometime Tuesday night and Wednesday. It is too
early to specify where the most significant impacts will occur and
which island is at greatest risk. It is important to remember that the
mountainous terrain of Hawaii can produce localized areas of highly
enhanced winds and rainfall, even well away from the tropical cyclone
center.

Hurricane Olivia will continue moving toward the west into Monday,
followed by an expected turn toward the west-southwest later Monday.
Based on the latest forecast track, Olivia will be approaching the main
Hawaiian Islands on Tuesday and will likely move over portions of the
island chain Tuesday night or Wednesday. At this time, it is vital to
not focus on the exact track, since small errors in the forecast motion
can lead to large differences in where the worst conditions will occur.
For those under a watch, now is the time to prepare.

Large swells and surf generated by Hurricane Olivia will be the
initial threat. Surf will slowly build over the next two days, and may
become damaging on some east facing shores Tuesday and Wednesday.

The chance for flooding rainfall will increase rapidly late Tuesday
and will remain a significant threat through at least Wednesday.
Preliminary storm total rainfall amounts are in the 10 to 15 inch
range, with isolated areas up to 20 inches. Much of this rainfall will
be focused on windward areas, many of which already received
substantial amounts of rain from recent Hurricane Lane. However,
flooding will be a significant threat for all areas.

POTENTIAL IMPACTS
-----------------

* WIND:
Prepare for dangerous wind having possible significant impacts across
portions of the State of Hawaii. Potential impacts in this area include:
    - Some damage to roofing and siding materials, along with damage
      to porches, awnings, carports, and sheds. A few buildings
      experiencing window, door, and garage door failures. Mobile
      homes damaged, especially if unanchored. Unsecured lightweight
      objects become dangerous projectiles.
    - Several large trees snapped or uprooted, but with greater
      numbers in places where trees are shallow rooted. Several
      fences and roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. A few bridges, causeways, and access
      routes impassable.
    - Scattered power and communications outages, but more prevalent
      in areas with above ground lines.


* SURGE:
Prepare for locally hazardous surge having possible limited impacts
across eastern shore lines from the Big Island to Oahu. Potential
impacts in this area include:
    - 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.

Elsewhere across the Hawaiian islands, little to no impact is
anticipated.

* FLOODING RAIN:
Prepare for life-threatening rainfall flooding having possible
extensive impacts across the Hawaiian islands. Potential impacts
include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and tributaries may rapidly overflow their banks in
      multiple places. Small streams, creeks, canals, arroyos, and
      ditches may become dangerous rivers. In mountain areas,
      destructive runoff may run quickly down valleys while
      increasing susceptibility to rockslides and mudslides. Flood
      control systems and barriers may become stressed.
    - Flood waters can enter many structures within multiple
      communities, some structures becoming uninhabitable or washed
      away. Many places where flood waters may cover escape routes.
      Streets and parking lots become rivers of moving water with
      underpasses submerged. Driving conditions become dangerous.
      Many road and bridge closures with some weakened or washed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS
----------------------------------

* EVACUATIONS:
Listen to local official for recommended preparedness actions,
including possible evacuation. If ordered to evacuate, do so
immediately.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to check your emergency plan and emergency supplies
kit and take necessary actions to protect your family and secure your
home or business.

When making safety and preparedness decisions, do not focus on the
exact forecast track since hazards such as flooding rain, damaging
wind gusts, storm surge, and tornadoes extend well away from the
center of the storm.

If in a place that is vulnerable to high wind, such as near large
trees, a manufactured home, upper floors of a high-rise building, or
on a boat, plan to move to safe shelter.

If you live in a place particularly vulnerable to flooding, such as
near the ocean or a large inland lake, in a low-lying or poor
drainage area, in a valley, or near an already swollen river, plan to
move to safe shelter on higher ground.

Always heed the advice of local officials and comply with orders that
are issued. Do not needlessly jeopardize your life or the lives of
others.

When securing your property, outside preparations should be concluded
as soon as possible before conditions deteriorate. The onset of
strong gusty winds or flooding can cause certain preparedness
activities to become unsafe.

Be sure to let friends and family members know of your intentions for
weathering the storm and your whereabouts. Have someone located away
from the threatened area serve as your point of contact. Share vital
contact information with others. Keep cell phones handy and charged.

Check on those who may not be fully aware of the situation or who are
unable to make personal preparations.

If you are a visitor, know the name of the county or parish in which
you are located and where it is relative to current watches and
warnings. If staying at a hotel, ask the management staff about their
onsite disaster plan. Listen for evacuation orders, especially
pertaining to area visitors.

Closely monitor weather.gov, NOAA Weather Radio and local news
outlets for official storm information. Listen for possible changes
to the forecast.

* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see ready.gov
- For information on creating an emergency plan see getagameplan.org
- For additional disaster preparedness information see redcross.org

NEXT UPDATE
-----------

The next local statement will be issued by the National Weather
Service in Honolulu HI around 600 AM HST, or sooner if conditions
warrant.

$$
Wroe
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