Big Island North and East Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

High Surf Advisory
Issued: 3:27 PM HST Aug. 20, 2018 – National Weather Service

... High surf advisory remains in effect until 6 PM HST Tuesday...

* surf... building to 6 to 12 feet along east facing shores of
The Big Island and Maui, with largest waves expected along the
southeast coast of The Big Island.

* Timing... building tonight into Tuesday.

* Impacts... moderate... expect strong breaking waves, shore
break, and strong longshore and rip currents making swimming
difficult and dangerous.

Precautionary/preparedness actions...

Beachgoers, swimmers, and surfers should heed all advice given by
ocean safety officials and exercise caution. Large breaking surf,
significant shorebreak, and dangerous currents make entering the
water very hazardous. Anyone entering the water could face
significant injury or death.





Hurricane Watch
Issued: 4:48 AM HST Aug. 21, 2018 – National Weather Service

... Hurricane Watch in effect...

A Hurricane Watch means hurricane-force winds are possible somewhere
within this area within the next 48 hours

* locations affected
    - Hilo
    - Kamuela
    - Hawi
    - Pahoa
    - Volcano

* wind
    - latest local forecast: below tropical storm force wind
        - peak wind forecast: 20-30 mph with gusts to 45 mph

    - potential threat to life and property: potential for wind 39 to
      57 mph
        - plan: plan for hazardous wind of equivalent tropical storm
          force due to possible forecast changes in track, size, or
          intensity.
        - Prepare: efforts to protect property should now be
          underway. Prepare for limited wind damage.
        - Act: act now to complete preparations before the wind
          becomes hazardous.

    - Potential impacts: limited
        - 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.

* Storm surge
    - latest local forecast: not available at this time. To be
      updated shortly.

    - Threat to life and property: not available at this time. To be
      updated shortly.

    - Potential impacts: not available at this time. To be updated
      shortly.

* Flooding rain
    - latest local forecast:
        - peak rainfall amounts: additional 18-24 inches, with
          locally higher amounts

    - potential threat to life and property: potential for major
      flooding rain
        - plan: emergency plans should include the potential for
          major flooding from heavy rain. Evacuations and rescues are
          likely.
        - Prepare: strongly consider protective actions, especially
          if you are in an area vulnerable to flooding.
        - Act: heed any flood watches and warnings. Failure to take
          action will likely result in serious injury or loss of life.

    - Potential impacts: extensive
        - 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.

* Tornado
    - latest local forecast:
        - situation is unfavorable for tornadoes

    - potential threat to life and property: tornadoes not expected
        - plan: tornadoes are not expected. Showers and thunderstorms
          with gusty winds may still occur.
        - Prepare: little to no preparations needed to protect
          against tornadoes at this time. Keep informed of the latest
          tornado situation.
        - Act: listen for changes in the forecast.

    - Potential impacts: little to none
        - little to no potential impacts from tornadoes.

* For more information:
    - http://www.Prh.NOAA.Gov/hnl




High Surf Advisory
Issued: 3:27 PM HST Aug. 20, 2018 – National Weather Service

... High surf advisory remains in effect until 6 PM HST Tuesday...

* surf... building to 6 to 12 feet along east facing shores of
The Big Island and Maui, with largest waves expected along the
southeast coast of The Big Island.

* Timing... building tonight into Tuesday.

* Impacts... moderate... expect strong breaking waves, shore
break, and strong longshore and rip currents making swimming
difficult and dangerous.

Precautionary/preparedness actions...

Beachgoers, swimmers, and surfers should heed all advice given by
ocean safety officials and exercise caution. Large breaking surf,
significant shorebreak, and dangerous currents make entering the
water very hazardous. Anyone entering the water could face
significant injury or death.