[Tropical] Hurricane Local Statement

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Tropical Storm Olivia Local Statement Advisory Number 47
National Weather Service Honolulu HI  EP172018
1129 PM HST Tue Sep 11 2018

This product covers the Hawaiian islands

**SLOW-MOVING OLIVIA LURKING JUST EAST OF MAUI**

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

* CHANGES TO WATCHES AND WARNINGS:
    - The Tropical Storm Warning has been cancelled for Kauai
      Leeward, Kauai Mountains, Kauai Windward, and Niihau

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning 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 220 miles east of Honolulu or about 120 miles east of
      Kahului
    - 20.8N 154.6W
    - Storm Intensity 45 mph
    - Movement West-southwest or 250 degrees at 8 mph

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

Tropical Storm Olivia continues to slowly approach the state from the
east. Strong winds, heavy rainfall, and high surf will impact the
islands during the next couple of days.

Winds are already increasing over Maui County ahead of Olivia, and winds
will be on the increase over Oahu and parts of the Big Island overnight.
Tropical storm force winds are expected to reach Maui and northern
portions of the Big Island overnight, and Oahu on Wednesday morning as
Olivia draws closer to the state. Although the tropical storm warning
has been cancelled for Kauai, increasing winds are still expected there
late tonight, with advisory-level winds on Wednesday into Wednesday night.

The mountainous terrain of the islands will produce localized areas of
highly enhanced winds well ahead of Olivia, which can cause damage
before the onset of more widespread tropical storm force winds.

Showers will continue to increase overnight with the chance for flooding
rainfall increasing rapidly toward morning, then remaining a significant
threat through Thursday night. Expect rainfall totals of 5 to 10 inches,
with isolated areas reaching up to 15 inches. Much of this rainfall
will be focused on windward areas of the islands, especially from Kauai
through Maui. However, flooding is still a significant threat for all
areas, particularly as Olivia moves over the islands.

Swells and surf generated by Olivia will continue to build along east
facing shores overnight, reaching damaging levels late tonight and
Wednesday. Surf heights along east facing shores are expected to reach
up to 20 feet on Oahu, Molokai, Maui and the Big Island. Along the east
facing shores of Kauai and Lanai, expect surf to reach 10 to 14 feet.
This surf is expected to result in significant beach erosion and
overwash onto vulnerable coastal roadways, particularly during high
tides.

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

* WIND:
Potential impacts from the main wind event are now unfolding across
the Hawaiian islands. Remain well sheltered from hazardous wind
having possible impacts, including:
    - Damage to porches, awnings, carports, sheds, and unanchored
      mobile homes. Unsecured lightweight objects blown about.
    - Many large tree limbs broken off. A few trees snapped or
      uprooted, but with greater numbers in places where trees are
      shallow rooted. Some fences and roadway signs blown over.
    - A few roads impassable from debris, particularly within urban
      or heavily wooded places. Hazardous driving conditions on
      bridges and other elevated roadways.
    - Scattered power and communications outages.

* FLOODING RAIN:
Potential impacts from the flooding rain are still unfolding across
Maui. Remain well guarded against life-threatening flood waters having
possible devastating impacts. If realized, these 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.

Potential impacts from the flooding rain are still unfolding across
the remainder of the state of Hawaii. Remain well guarded against
life-threatening flood waters having possible extensive impacts. A Flash
Flood Watch remains in effect for the entire state through late Thursday
night.

* OTHER COASTAL HAZARDS:
Large and dangerous surf and strong rip currents will continue along east
facing shores. Prepare for overwash of low lying areas and roadways with
localized beach erosion around high tide. A High Surf Warning is in effect
for east facing shores of the Big Island, parts of Maui County, and Oahu,
and a High Surf Advisory is in effect for east facing shores of Lanai and
Kauai.

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 stay inside and away from windows. Listen for
updates and be ready in case you lose electrical power. Keep a
battery-powered radio, charged cell phone and flashlight handy.

During the peak of the storm be ready to move quickly. Keep your
shoes on and rain gear handy. Boots and athletic shoes offer the best
foot protection if you become unexpectedly exposed to the weather.

Keep your cell phone charged and in power-saving mode. If you lose
power, use it sparingly and mainly for personal emergencies and
check-ins.

If your location is prone to flooding, be prepared for the possibility of
a quick and dramatic rise in water levels.

* 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 530 AM HST, or sooner if conditions
warrant.

$$
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