Active Weather Alerts
Flash Flood Warning
Issued: 12:52 AM Aug. 17, 2026 – National Weather Service
The National Weather Service in Honolulu has issued a * Flash Flood Warning for... The island of Oahu in Honolulu County * Until 545 PM HST. * At 252 PM HST, Doppler radar indicated a band of heavy rain moving over the windward side of Oahu, focused over the Koolau Mountains. Rain was falling at a rate of 1 to 2.5 inches per hour. Waiahole and Manoa Streams are elevated once again. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Honolulu, Waipio, Waiahole, Waikane, Kahaluu, Ahuimanu, Aiea, Pearl City, Halawa, Moanalua, Mililani and Salt Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && FLASH FLOOD...RADAR INDICATED
Tropical Weather Statement
Issued: 12:05 AM Aug. 17, 2026 – National Weather Service
This product covers the Hawaiian islands **TROPICAL STORM CONDITIONS CONTINUE ACROSS KAUAI COUNTY** NEW INFORMATION --------------- * CHANGES TO WATCHES AND WARNINGS: - The Tropical Storm Warning has been cancelled for Central Oahu, East Honolulu, Ewa Plain, Haleakala Summit, Honolulu Metro, Kahoolawe, Kipahulu, Koolau Leeward, Koolau Windward, Lanai Leeward, Lanai Mauka, Lanai South, Lanai Windward, Maui Central Valley North, Maui Central Valley South, Maui Leeward West, Maui Windward West, Molokai Leeward South, Molokai North, Molokai Southeast, Molokai West, Molokai Windward, Oahu North Shore, Olomana, South Haleakala, South Maui/Upcountry, Waianae Coast, Waianae Mountains, and Windward Haleakala * CURRENT WATCHES AND WARNINGS: - A Tropical Storm Warning is in effect for Kauai East, Kauai Mountains, Kauai North, Kauai South, Kauai Southwest, and Niihau * STORM INFORMATION: - About 130 miles southwest of Lihue - 20.8N 160.9W - Storm Intensity 65 mph - Movement West or 265 degrees at 20 mph SITUATION OVERVIEW ------------------ Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue this afternoon across portions of the state as Tropical Storm Lala continues to move away from the islands. Areas of heavy rain are still occurring in portions of Maui and Kauai County. Rain rates have decreased across the Big Island. The center of Tropical Storm Lala is located southwest of Kauai and will continue to move west away from the state through this evening. Tropical Storm Warnings have been canceled for Maui County, Oahu, and surrounding coastal waters. The Tropical Storm Warning is still in effect for Kauai County and surrounding coastal waters. Impacts can extend well beyond the center of the tropical storm, so continue to stay aware of the latest forecast and current weather conditions today. Over the past 3 hours the heaviest rainfall associated with Tropical Storm Lala occurred over the island of Kauai and eastern parts of Maui. Outer rain bands from Lala have the potential to bring periods of locally heavy rain to Maui County, Oahu, and Kauai County through the afternoon. Saturated soil from receiving 15 to 35 inches over the Big Island and 6 to 10 inches over Maui over last 24 hours will keep the flood threat elevated. Locally heavy rainfall may persist into Monday, mainly over the western end of the island chain. Lala is expected to produce additional rainfall totals of 1 to 3 inches across the Big Island with 2 to 4, locally up to 6, additional inches of rain for the smaller islands. While the highest rainfall amounts will be focused over windward areas and higher terrain, leeward areas will also have a significant flood risk. Winds have decreased for Oahu and Maui County with sustained winds generally 20 to 30 mph, with isolated mountain and downslope locations experiencing gusts up to 50 mph. Winds at the lower elevations of the Big Island are mainly sustained 15 to 20 mph with gusts up to 30 mph. Tropical storm conditions will continue for Kauai County into this evening. East swell generated by Lala will remain elevated this afternoon, decreasing from east to west this evening and tonight. Some elevated surf is also possible along exposed south-facing shores today between Maui and Kauai as Lala continues westward. Significant beach erosion and overwash are still possible across vulnerable coastal infrastructure. POTENTIAL IMPACTS ----------------- * WIND: Potential impacts from the main wind event continue for Kauai. Remain well sheltered from hazardous wind having additional limited impacts. If realized, these impacts include: - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly within urban or heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. Elsewhere across the Hawaiian islands, little to no impact is anticipated. * SURGE: Little to no impacts are anticipated at this time across the Hawaiian islands. * FLOODING RAIN: Potential impacts from the flooding rain linger across Kauai, Oahu, and portions of Maui County. Remain well guarded against dangerous flood waters having additional impacts. If realized, these impacts include: - Moderate rainfall flooding may prompt several evacuations and rescues. - Rivers and tributaries may quickly become swollen with swifter currents and overspill their banks in a few places, especially in usually vulnerable spots. Small streams, creeks, canals, arroyos, and ditches overflow. - Flood waters can enter some structures or weaken foundations. Several places may experience expanded areas of rapid inundation at underpasses, low-lying spots, and poor drainage areas. Some streets and parking lots take on moving water as storm drains and retention ponds overflow. Driving conditions become hazardous. Some road and bridge closures. Potential impacts from the flooding rain are still unfolding across Kauai, Oahu, and parts of Maui County. Remain well guarded against locally hazardous flood waters having additional limited impacts. * TORNADOES: Potential impacts from tornadoes linger across Maui County, Oahu, and Kauai. Remain well braced against a tornado event having possible limited impacts. If realized, these impacts include: - The occurrence of isolated tornadoes can hinder the execution of emergency plans during tropical events. - A few places may experience tornado damage, along with power and communications disruptions. - Locations could realize roofs peeled off buildings, chimneys toppled, mobile homes pushed off foundations or overturned, large tree tops and branches snapped off, shallow-rooted trees knocked over, moving vehicles blown off roads, and small boats pulled from moorings. Elsewhere across the Hawaiian islands, little to no impact is anticipated. PRECAUTIONARY/PREPAREDNESS ACTIONS ---------------------------------- * EVACUATIONS: Follow the advice of local officials * OTHER PREPAREDNESS INFORMATION: Keep your cell phone charged and in power-saving mode. If you lose power, use it sparingly and mainly for personal emergencies and check-ins. Do not be a thrill seeker or risk your life for senseless photos or videos. If you are prone to flooding, be prepared for the possibility of a quick and dramatic rise in water levels. * ADDITIONAL SOURCES OF INFORMATION: - For information on appropriate preparations see ready.gov - For information on creating an emergency plan see getagameplan.org - For additional disaster preparedness information see redcross.org NEXT UPDATE ----------- The next local statement will be issued by the National Weather Service in Honolulu HI around 5 PM HST, or sooner if conditions warrant.
Flood Watch
Issued: 2:15 PM Aug. 16, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Kauai, Niihau, and Oahu. * WHEN...Through late tonight. * IMPACTS...Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams. Urban areas may receive more significant flooding and property damage due to rapid runoff. * ADDITIONAL DETAILS... - Tropical Storm Lala will bring periods of heavy rain to Kauai, Niihau, and Oahu through late tonight. Current forecast has rainfall amounts of 2 to 6 inches with local amounts up to 8 inches possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. &&
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