Categorized | Hurricane, News, Weather

Flash Flood Warning extended for the entire Island of Hawaii Friday (Aug 24)

Tropical Cyclone Lane incident map for Hawaii Island

Police Advisories:

Both lanes of Mamalahoa Highway south (Route 11) are CLOSED between the 58 and 62 mile markers in Ka‘u due to flooding in the Kawa area.

This is a Civil Defense update for 8:30 p.m., Friday, August 24, 2018.

The Hawaii Police Department reports multiple road closures due to flooding, landslides, and debris. Throughout the island, crews are not able to open these roadways at this time. You are advised to stay off all roadways due to very hazardous conditions.

For your information, sandbags cannot be distributed at this time because crews are only responding to life-saving tasks. Again, police report extremely dangerous driving conditions throughout the island. Major closures are occurring due to landslides and water runoffs.

Thank you and please be safe. This is your Hawaii County Civil Defense Agency.


Flooding in the Alenaio flood plain/Hilo Bayfront Soccer Fields for the massive rainfall of Hurricane Lane Friday, August 24, 2018.

This graph shows the 6 hour rainfall at Piihonua in Hilo. Negative values indicate missing or trace events.

This graph shows the 6 hour rainfall at Piihonua in Hilo. Negative values indicate missing or trace events.

The National Weather Service in Honolulu has extended the Flash Flood Warning for the island of Hawaii in Hawaii County until 2:30 a.m. HST Saturday, August 25, 2018.

At 11:35 p.m. HST, radar and rain gages showed extremely heavy rainfall persisting over the Ka‘u and Puna Districts. Persistent rainfall rates of 2 to 3 inches per hour have been observed for several hours, and extreme flooding impacts are being reported by Hawaii County Civil Defense. Numerous road closures are in place including Keaau-Pahoa Road (Route 130) between Kea‘au and Hawaiian Paradise Park, near Pahala at Kawa Flats, and on portions of Daniel K. Inouye Highway (Route 200/Saddle Road). THIS IS A VERY DANGEROUS SITUATION. DO NOT TRAVEL DUE TO ONGOING FLOOD IMPACTS.

This warning has been expanded to include the entire Big Island.

This warning may need to be extended beyond 2:30 a.m. HST Saturday (Aug 25) if heavy rain persists.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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. Remember, if lightning does threaten your area, the safest place to be is indoors.

Debris in streams and gulches may clog bridges and culverts resulting in flooding outside normal water channels causing damage.

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

This map is meant to be an approximate depiction of the areas that have had rain over the period ending at 2 p.m. Friday (Aug 24). The map is created using a network of rain gauges. This data is not quality controlled, and the map may not be accurate, particularly in areas where there are few gauges.

This map is meant to be an approximate depiction of the areas that have had rain over the period ending at 2 p.m. Friday (Aug 24). The map is created using a network of rain gauges. This data is not quality controlled, and the map may not be accurate, particularly in areas where there are few gauges.

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