HONOLULU (HawaiiNewsNow) - Keep track of all of the advisories, warnings and closures across the state with the Hawaii News Now severe weather blog.
Update: Sunday, 5:20 p.m.
The National Weather Service has cancelled the flood advisory for Oahu. Heavy rains have moved offshore.
Update: Sunday, 3:20 p.m.
The National Weather Service has issued a Flood Advisory for the island of Oahu until 6:15 p.m.
At 3:06 p.m. the radar showed heavy rain moving on to the south shore of Oahu near Pearl Harbor. Showers are moving northeast at 20 mph. Radar and rain gauges indicate rainfall rates of 1 to 2 inches per hour in the heaviest downpours.
Other locations in the advisory include but are not limited to Waikele, Kunia, Whitmore Village, Waipio, Waipahu, Waimalu, Wahiawa, Schofield Barracks, Pearl City, Nanakuli, Mililani Town, and Aiea.
Stay away from streams, drainage ditches, and low lying areas prone to flooding.
Update: Sunday, 3 p.m.
The National Weather Service is reporting that Widespread showers are moving over Oahu towards the northeast at 20 mph.
Rainfall extends well to the southwest so briefly heavy downpours of 1 inch per hour, perhaps greater at times, are likely over the next sever al hours.
The heaviest rain may cause ponding on roadwaysiand in poor drainage areas, as well as temporarily reduce visibility which can make driving difficult.
Update: Sunday, 7:30 a.m.
The flash flood watch for Niihau, Kauai and Oahu has been cancelled as heavy shower activity decreased significantly overnight.
We're not quite done with the wet weather, however. The cold front that brought in the unstable conditions is still just west of Niihau. It could bring some showers, some locally heavy, and keep the weather on the cloudy and wet side for the next few days as it stalls and dissipates near Kauai and Oahu.
The only other weather warning right now is a high wind warning for the summit areas of Mauna Loa and Mauna Kea on the Big Island of Hawaii until noon today.
Update: 7:40 p.m.
The severe thunderstorm watches for Kauai and Oahu have expired. However, the two islands are still under a Flash Flood Watch through 6 a.m. Sunday.
Update: 2:00 p.m.
The National Weather Service has extended severe thunderstorm watches for Kauai and Oahu.
The severe thunderstorm watch for Kauai, which was set to expire at 2 p.m., has been extended until 8 p.m. The watch for Oahu, which was to expire at 4 p.m., also has been extended until 8 p.m.
The watch means severe thunderstorms could bring winds of 58 miles per hour and produce damaging hail the size of quarters or larger.
Persons on Kauai and Oahu should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
A Flash Flood Watch also remains in effect for Niihau, Kauai and Oahu until 6 a.m. Sunday.
Update 12:45 p.m.
A Severe Thunderstorm Watch has been issued for the island of Oahu until 4 p.m.
Forecasters at the National Weather Service said the watch means that severe thunderstorm conditions are possible. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
Severe thunderstorms can produce damaging winds of 58 miles per hour or higher, or destructive hail the size of quarters or larger.
A severe thunderstorm watch is also in effect for Kauai until 2 p.m.
Update: 12:15 p.m.
A Severe Thunderstorm Watch remains in effect for the island of Kauai until 2 p.m. The watch also covers coastal waters around the Garden Isle.
I just talked with lead forecaster Derek Wroe at the National Weather Service, where forecasters are also closely watching an area of thunderstorms that fired up to the southwest of Oahu. We'll keep you posted through the afternoon as this develops.
Update: 11:35 a.m.
Besides the Flash Flood Watch for Kauai, Niihau and Oahu, the National Weather Service also has the following watches and advisories in effect:
- Severe Thunderstorm Watch 1 until 2 p.m. Saturday for coastal waters around Kauai.
- Wind advisory until 6 p.m. Saturday for the summit areas of Mauna Loa and Mauna Kea above 8,000 feet. Forecasters expect winds of 20 to 35 miles per hour with localized gusts over 45 miles per hour.
There's also a special marine weather statement. Mariners should be alert for thunderstorm activity in Kauai coastal waters. The thunderstorms are expected to increase in coverage over the Kauai Channel and western portions of Oahu coastal zones into Saturday afternoon. The strongest storms will produce frequent lightning, small hail and gusty winds. Briefly higher seas and reduced visibility are also likely.
Update: 11:15 a.m.
The National Weather Service has cancelled the flood advisory that was in effect for Kauai. Forecasters said weather radar and rain gages indicated that the heavy rains have ended.
A Flash Flood Watch remains in effect for Kauai, Niihau and Oahu.
Update: 10:45 a.m.
The severe thunderstorm warning for Kauai has expired. Forecasters say the line of thunderstorms has weakened.
Meantime, a flood advisory remains posted for Kauai until 1 p.m. Overall, a Flood Watch is still posted for Kauai, Niihau and Oahu.
Update: 10:30 a.m.
- style="list-style: disc !important; margin: 0.8em 0px; padding: 0px !important;">At 10 am, radar showed heavy rain 6 miles southeast of Polihale, or about 21 miles west of Lihue. The area of heavy rain was to the northeast at around 10 mph.
- style="list-style: disc !important; margin: 0.8em 0px; padding: 0px !important;">Other locations in the advisory include but are not limited to Haena, Wainiha, Na Pali State Park, Kalalau Valley. Princeville, Kokee State Park and Hanalei. A Flash Flood Watch is also in effect for the islands of Kauai Niihau and Oahu through late tonight. This advisory may need to be extended beyond 1:00 pm if Heavy Rain persists.
Update: 10:20 a.m.
The National Weather Service has issued a Severe Thunderstorm Warning for:.
The island of Kauai in Kauai County.
- Until 10:45 a.m.
- At 10:08 am, radar indicated a line of severe thunderstorms capable of producing damaging winds in excess of 60 mph. These storms were located along a line extending from 6 miles southwest of Kekaha to 11 miles southwest of Kaumakani to 30 miles south of Kaumakani, moving to the northeast at 40 mph.
- Locations potentially impacted include: Waimea, Hanapepe, Kalaheo, Poipu, Omao and Koloa.
A line of strong thunderstorms will move across Kauai from the west by 9:45 am near Barking Sands and move slowly eastward through 10:45 am. Strong and gusty winds around 40 mph and frequent lightning will accompany the line.
Interactive Radar: http://bit.ly/11BvA73
***We are converting this story into a live blog to continue to provide the late-breaking details as they develop.
The National Weather Service has issued a severe thunderstorm watch until 2 p.m. for Kauai.
A severe thunderstorm watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings.
Severe thunderstorms produce damaging winds of 58 mph or higher or destructive hail the size of quarters or larger.
Flash Flood Watch For Kauai and Oahu remains in effect through late tonight.
- The threat of flooding remains elevated as isolated thunderstorms and localized Heavy rains are possible for the affected islands.
The threat of flash flooding is heightened for Kauai, Niihau, and Oahu as a cold front approaching from the west will bring increasing showers and a slight chance of thunderstorms.
The front will stall over the western islands some time tonight or Sunday and slowly dissipate.
Right now it doesn't look like Maui County or Hawaii Island will see the heavy rainfall expected for the western half of the state.
Much of Kauai is already saturated from previous rains and it won't take much to create runoff and flooding. If you live or work in a low-lying or flood-prone area, stay alert and in touch with your surroundings. Rain doesn't necessarily need to be falling in your neighborhood for flooding to occur.