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Flood Advisory issued for Hawaii Island as rains from Hilda move in

Updated 5:45 p.m. 8/13/15z

Hawaii County Civil Defense 4:15 p.m. audio message on the flash flood watch

Weather advisory map via National Weather Service/NOAA

Weather advisory map via National Weather Service/NOAA

UPDATED (1:57 PM on 8/13/2015)

At 1:36 p.m. weather radar showed heavy rain straddling the Daniel K. Inouye Highway near Pohakuloa. Rain rates in this area were in the 1-2 inches per hour range. Widespread moderate to heavy rain continues to fall over Puna, south Hilo and north Hilo districts with rates of about 1 inch per hour.

Locations in the advisory include, but are not limited to Hilo, Mountain View, Pahoa, Hawaii Volcanoes National Park, Pahala, Mamalahoa Highway (Hwy 11) from Hilo to Naalehu and Daniel K. Inouye Highway from Pohakuloa to Hilo.

The flood advisory remain in effect until 3:30 p.m. for Hawaii Island.


Hawaii County Civil Defense 10:20 a.m. audio message on the flash flood watch

A flood watch is in effect for Hawaii Island from 6 a.m. Thursday to 6 a.m. Saturday (Aug 15).

The slowing of Tropical Storm Hilda’s forward motion has delayed the arrival of precipitation to the islands. The heavy rains are forecast to arrive beginning Thursday and continuing through Friday night.

Rainfall in the amounts of 4-8 inches with local amounts up to 12 inches are possible. The highest amounts are expected to occur along the east and southeast facing slopes.

In addition to flood prone areas…heavy rain events of this size may cause flooding in areas outside of the designated flood zones. Low spots in roads will become dangerous and impassable due to severe runoff. High amounts of debris in streams and gulches may clog bridges and culverts resulting in dangerous flooding outside the normal channels and significant property damage.

Campers and hikers should avoid low lying flood prone areas. People should stay away from streams, drainage ditches and low lying areas prone to flooding. The rainfall and runoff will cause hazardous driving conditions due to ponding, reduced visibility and poor braking action. Excessive runoff may cause rockslides and mudslides in steep terrain.

Do not cross fast flowing or rising water in your vehicle or on foot. Turn around, don’t drown.

For links to the latest weather forecasts, reports, radar and satellite imagery visit our Weather Page at hawaii247.com/weather

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