High Surf Advisory

Coastal Hazard Message
National Weather Service Honolulu HI
352 AM HST Mon Aug 20 2018

...HIGH SURF ADVISORY FOR EAST FACING SHORES OF THE BIG ISLAND
AND MAUI...

.Long-period swells from Hurricane Lane will begin to arrive along
east facing shores of the Big Island and Maui today and tonight,
resulting in increasingly large surf. Increasing surf and seas
generated by Lane will likely continue to build, and may impact
other areas as the week progresses.

HIZ020-024-025-210300-
/O.EXT.PHFO.SU.Y.0036.180820T1352Z-180822T0400Z/
Windward Haleakala-South Big Island-Big Island North and East-
352 AM HST Mon Aug 20 2018

...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 PM HST TUESDAY...

* SURF...building to 6 to 10 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 today and tonight. Surf may continue to build
  on 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.

&&

$$

Birchard


Hydrologic Outlook

Hydrologic Outlook
HIZ001>028-210300-

Hydrologic Outlook
National Weather Service Honolulu HI
335 AM HST Mon Aug 20 2018

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD POTENTIAL
OUTLOOK FOR THE STATE OF HAWAII...

...HURRICANE LANE WILL BRING THE POTENTIAL FOR HEAVY RAINS AND
FLASH FLOODING THIS WEEK...

The latest forecast from the Central Pacific Hurricane Center
indicates that the center of Hurricane Lane will pass south and
southwest of the islands this week. As the impacts from a hurricane
extend well away from the center, associated heavy rains are
expected to impact the islands.

Latest forecast models indicate that, regardless of the eventual
track and intensity of Lane, an extremely moist and unstable air
mass will move over the islands beginning around Wednesday, and
will remain in place through the end of the week. This is
expected to result in very heavy rainfall, potentially leading to
flash flooding.

The details on the timing and location of the heavy rain are
still uncertain. Please keep yourself informed through NOAA
Weather Radio or local media for forecast updates.

An updated outlook will be issued by 5 pm today or sooner if
necessary.

$$

Birchard


Hydrologic Outlook
HIZ001>028-210300-

Hydrologic Outlook
National Weather Service Honolulu HI
335 AM HST Mon Aug 20 2018

...THE NATIONAL WEATHER SERVICE HAS ISSUED A FLOOD POTENTIAL
OUTLOOK FOR THE STATE OF HAWAII...

...HURRICANE LANE WILL BRING THE POTENTIAL FOR HEAVY RAINS AND
FLASH FLOODING THIS WEEK...

The latest forecast from the Central Pacific Hurricane Center
indicates that the center of Hurricane Lane will pass south and
southwest of the islands this week. As the impacts from a hurricane
extend well away from the center, associated heavy rains are
expected to impact the islands.

Latest forecast models indicate that, regardless of the eventual
track and intensity of Lane, an extremely moist and unstable air
mass will move over the islands beginning around Wednesday, and
will remain in place through the end of the week. This is
expected to result in very heavy rainfall, potentially leading to
flash flooding.

The details on the timing and location of the heavy rain are
still uncertain. Please keep yourself informed through NOAA
Weather Radio or local media for forecast updates.

An updated outlook will be issued by 5 pm today or sooner if
necessary.

$$

Birchard