UPDATE 4: High Surf, Flood Advisory, Flash Flood Watch

Dec. 1, 2016, 3 p.m. NWS/NOAA image.

Dec. 1, 2016, 2 p.m. NWS/NOAA image.

Dec. 1, 2016, 10:43 a.m. NWS/NOAA image.

Dec. 1, 2016, 7:30 a.m. NWS/NOAA image.

UPDATE 4: Dec. 1, 3:29 p.m.

The National Weather Service has issued a High Surf Advisory, Flood Advisory and Flash Flood Watch for the Big Island.

The High Surf Advisory remains in effect until 6 p.m. Friday, Dec. 2.

Surf:

• 6 to 10 feet along east facing shores of the Big Island, Kaua‘i, O‘ahu, Molokai and Maui .
• 12 to 18 feet along north- and west-facing shores of Ni‘ihau and Kaua‘i and north facing shores
  of O‘ahu, Molokai and Maui.
• 8 to 12 feet along west-facing shores of O‘ahu and Molokai.

Surf will remain elevated along east-facing shores through Friday. Surf will build along north and west facing shores through tonight and peak Friday.

Expect strong breaking waves, shore break and strong longshore and rip currents, making swimming
difficult and dangerous.

Beachgoers, swimmers and surfers should heed all advice given by ocean safety officials and exercise caution. Know your limits and seek ocean recreation areas best suited for your abilities.
When in doubt… do not go out.

UDPATE 3: Dec. 1, 2 p.m.

The National Weather Service in Honolulu has extended the Flood Advisory for the Island of Hawai‘i until 5 p.m.

At 1:49 p.m., radar and rain gages showed that another band of heavy rain has moved onshore over the Puna and South Hilo Districts.

Rain rates have been 1 to 2 inches per hour, which will keep stream levels high.

Additional rainfall may develop over the windward slopes of the Big Island during the next several hours.

Locations in the advisory include but are not limited to:

• Hilo
• Hawaiian Paradise Park
• Waikoloa Village
• Kapa‘au
• Honoka‘a
• Kamuela
• Kukuihaele
• Pu‘uanahulu
• Pohakuloa Training Area
• Waimanu Valley
• Kohala Ranch
• Waipio Valley

Stay away from streams, drainage ditches and low lying areas prone
to flooding.

Rainfall and runoff will also cause hazardous driving conditions due to ponding, reduced visibility and poor braking action.

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

This advisory may need to be extended beyond 5 p.m. if heavy rain persists.

A Flash Flood Watch is also in effect for Hawaii County through Sunday afternoon.

UPDATE 2: Dec. 1, 10:53 a.m.

The National Weather Service in Honolulu has extended the Flood Advisory for Hawai‘i County until 2 p.m.

At 10:50 a.m., radar indicated a large area of rain with embedded thunderstorms covering the northern and eastern portions of the Big Island. Rain is expected to continue for the next few

Rain is expected to continue for the next few hours and additional thunderstorms—some with rainfall rates in excess of two inches per hour—are moving onshore in the Hilo and Hamakua Districts. Streams will continue to rise… with ponding of

Streams will continue to rise, with ponding in low-lying and poor drainage areas.

Locations in the advisory include but are not limited to:

• Hawi
• Waipio Valley
• Laupahoehoe
• Hilo
• Kea‘au
• Kapoho
• Pahoa
• Glenwood
• Mountain View
• Volcano
• Saddle Road
• Pohakuloa Training Area
• Waiki‘i
• Waikoloa
• Kawaihae

Stay away from streams, drainage ditches and low-lying areas prone to flooding.

Rainfall and runoff will also cause hazardous driving conditions due to ponding,  reduced visibility and poor braking action.

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

This advisory may need to be extended beyond 2 p.m. if heavy rain persists.

A Flash Flood Watch is also in effect for the entire state through the weekend.

UPDATE 1: Dec. 1, 9 a.m.

The flash flood watch has been extended through Sunday, Dec. 4 and has been expanded to cover all Hawaiian Islands.

ORIGINAL POST: Dec. 1, 8:30 a.m.

The National Weather Service has issued a flash flood watch for the Big Island until Friday afternoon, Dec. 2.

A flash flood watch means that conditions may develop that may lead to flash flooding.

There is a potential for heavy rains and thunderstorms.

Due to the flash flood watch the following are issued: residents in flood prone areas are asked to be prepared for and be on the lookout for flood conditions.

Motorists should drive with caution and be on the alert for ponding and debris on the roadways.

Be aware that road closures can occur without warning. NWS/NOAA image 7:30 a.m.