[Tropical] Hurricane Local Statement

Thu Aug 23 22:45:55 CDT 2018

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Hurricane Lane Local Statement Advisory Number 38
National Weather Service Honolulu HI  EP142018
545 PM HST Thu Aug 23 2018

This product covers the Hawaiian islands

**DANGEROUS HURRICANE LANE SOUTH OF THE MAIN HAWAIIAN ISLANDS AND
MOVING TOWARD THE NORTH-NORTHWEST**

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

* CHANGES TO WATCHES AND WARNINGS:
    - A Tropical Storm Warning has been issued and the Hurricane
      Warning has been cancelled for Big Island Interior, Big Island
      North and East, Kohala, Kona, Big Island Summits, and South Big Island

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for Big Island Interior,
      Big Island North and East, Kohala, Kona, Big Island Summits, and
      South Big Island
    - A Hurricane Warning is in effect for Central Oahu, Haleakala
      Summit, Kahoolawe, 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, Waianae Coast, Waianae
      Mountains, and Windward Haleakala
    - A Hurricane Watch is in effect for Kauai Leeward, Kauai
      Mountains, Kauai Windward, and Niihau

* STORM INFORMATION:
    - About 240 miles south of Honolulu or about 180 miles southwest
      of Kailua-Kona
    - 17.8N 157.9W
    - Storm Intensity 120 mph
    - Movement North-northwest or 340 degrees at 6 mph

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

Hurricane Lane remains a major category 3 storm late this afternoon,
with maximum sustained winds of 120 mph. As of 5 PM HST, Hurricane Lane
was located around 175 miles southwest of Kailua-Kona, Hawaii and 240
miles south of Honolulu, Hawaii. Lane is moving toward the north-northwest
at around 6 mph. A slow general northward motion is expected to continue
through Friday. A turn toward the west is expected Saturday and Sunday,
with an increase in forward speed. On the forecast track, the center of
Lane will move over, or dangerously close to portions of the main Hawaiian
islands tonight and Friday. Regardless of the exact track, life threatening
impacts are likely over many areas as this strong hurricane makes its
closest approach. Do not focus on the exact forecast track or intensity
of Lane. Be prepared for changes in future forecasts. Although the official
forecast does not explicitly indicate Lane's center making landfall
over any of the islands, this could still occur.

The onset of damaging tropical storm-force winds is expected across
portions of the Big Island tonight. In Maui County, damaging tropical
storm-force winds are expected later tonight, with dangerous hurricane
force winds expected in some areas Friday. On Oahu, damaging tropical
storm force winds are expected to develop late tonight, with dangerous
hurricane force winds expected Friday into Friday night. Tropical
storm or hurricane conditions are possible on Kauai on Saturday.

Outer rain bands associated with Hurricane Lane are already affecting
all the main Hawaiian Islands. Widespread heavy rainfall and flash
flooding is ongoing over portions of the Big Island. The rain bands
will continue to spread northwest through Friday night. Excessive
rainfall is likely which could result in life threatening flash
flooding, as well as landslides and mudslides. Flooding will be
possible in areas that are typically not prone to flooding. Storm
total rainfall amounts of 10 to 20 inches are expected to be common
across the island chain, with localized amounts in excess of
30 inches.

Swells generated by Lane will produce very large life-threatening surf
and dangerous rip currents along southeast, south and southwest facing
shores of all of the Hawaiian islands. Large surf is likely occurring
along southeast facing shores on the Big Island. Surf is expected to
increase tonight along southwest facing shores of the Big Island as
well as along south and southeast facing shores from Maui County to
Kauai County, with the surf becoming extremely large later tonight
through Saturday. Surf heights as large as 10 to 15 feet are expected
in the Puna and Kau districts as well as along the Kona coast of the
Big Island. Surf heights of 10 to 20 feet are expected along south and
southeast facing coasts from Kauai County to Maui County.

The combination of storm surge and large breaking waves is expected to
raise water levels well above normal tide levels as Hurricane Lane
makes its closest approach. Water levels could reach 2 to 4 feet above
normal along southeast, south and southwest facing shores from Kauai
to Maui, as well as southeast, south, southwest and west facing shores
of the Big Island, should Lane makes landfall. This is expected to
result in significant beach erosion and overwash onto vulnerable
coastal roadways tonight through Saturday as Lane makes its closest
approach, particularly for vulnerable low-lying coastal areas during
and around the time of the normal high tide cycles.

Tornadoes and large waterspouts will be possible with Lane, mainly
along and to the right of the track of the hurricane.

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

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
devastating impacts across the Hawaiian islands. Potential impacts
include:
    - 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.

* WIND:
Protect against dangerous wind having possible significant impacts
across Maui County, Oahu, and western and southern sections of the
Big Island. 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.

Also, protect against hazardous wind having possible limited impacts
across northern and eastern sections of the Big Island and Kauai.

* SURGE:
Protect against life-threatening surge having possible significant
impacts across southeast, south and southwest facing coastlines. Potential
impacts in this area include:
    - Areas of inundation with storm surge flooding accentuated by
      waves. Damage to several buildings, mainly near the coast.
    - Sections of near-shore escape routes and secondary roads become
      weakened or washed out, especially in usually vulnerable low
      spots.
    - Major beach erosion with heavy surf breaching dunes. Strong and
      numerous rip currents.
    - Moderate damage to marinas, docks, boardwalks, and piers.
      Several small craft broken away from moorings, especially in
      unprotected anchorages.

Elsewhere across the Hawaiian islands, little to no surge impact is
expected at this time.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across the Hawaiian islands. Potential impacts include:
    - 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.

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

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

For those not under evacuation orders, assess the risk from wind, falling
trees, and flooding at your location. If you decide to move, relocate to
a safer location nearby. If you do not relocate, help keep roadways open
for those under evacuation orders.

If evacuating, leave with a destination in mind and allow extra time to get
there. Take your emergency supplies kit. Gas up your vehicle ahead of time.

Let others know where you are going prior to departure. Secure loose items
and pets in the car, and avoid distracted driving.

If evacuating, follow designated evacuation routes. Seek traffic information
on roadway signs, the radio, and from official sources.

Do not enter evacuated areas until officials have given the all clear to return.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to complete all preparations to protect life and
property in accordance with your emergency plan. Ensure you are in a
safe location before the onset of strong winds or possible flooding.

If you are relocating to safe shelter, leave as early as possible.
Allow extra time to reach your destination. Many roads and bridges
will be closed once strong winds arrive. Check the latest weather
forecast before departing and drive with caution.

If heading to a community shelter, become familiar with the shelter
rules before arrival, especially if you have special needs or have
pets. Take essential items with you from your Emergency Supplies Kit.

Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.

Keep cell phones well charged. Cell phone chargers for automobiles
can be helpful, but be aware of your risk for deadly carbon monoxide
poisoning if your car is left idling in a garage or other poorly
ventilated area.

It is important to remain calm, informed, and focused during an
emergency. Be patient and helpful with those you encounter.

If you are a visitor, be sure to know the name of the city or town in
which you are staying and the name of the county or parish in which
it resides. Listen for these locations in local news updates. Pay
attention for instructions from local authorities.

Storm surge is the leading killer associated with tropical storms and
hurricanes! Make sure you are in a safe area away from the surge
zone. Even if you are not in a surge-prone area, you could find
yourself cutoff by flood waters during and after the storm. Heed
evacuation orders issued by the local authorities.

Rapidly rising flood waters are deadly. If you are in a flood-prone
area, consider moving to higher ground. Never drive through a flooded
roadway. Remember, turn around don't drown!

If a Tornado Warning is issued for your area, be ready to shelter
quickly, preferably away from windows and in an interior room not
prone to flooding. If driving, scan the roadside for quick shelter
options.

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, consider moving to a safer shelter before the onset of
strong winds or flooding.

Closely monitor weather.gov, NOAA Weather radio or local news outlets
for official storm information. Be ready to adapt to possible changes
to the forecast. Ensure you have multiple ways to receive weather
warnings.

* 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 6 AM HST, or sooner if conditions
warrant.

$$
Burke
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