At 1018 PM HST, emergency management reported water over Hana Highway between Hana and Hamoa around 8 pm. Rainfall rates have been deceasing over the area and is now around 0.5 to 1.5 inches per hour. Water over the highway is receding. Another band of heavy showers southwest of Maui may increase showers again in the next couple of hours. Will continue to monitor for any additional heavy rain. HAZARD...Flash flooding caused by heavy rain. SOURCE...Emergency management. IMPACT...Flooding in drainages, streams, rivers, roads, properties, and other low-lying areas. Public road closures possible in some areas. Landslides are possible in steep terrain. Some locations that will experience flash flooding include... Hana, Kipahulu and Hamoa.
Recommendations
Stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry.
Wed 6:00 AM → Fri 6:00 PM HST
WHAT
Flash flooding caused by excessive rainfall is possible.
WHERE
All Hawaiian islands.
WHEN
From Wednesday morning through Friday afternoon.
IMPACTS
Significant flooding may occur due to excessive rainfall and overflow of streams and drainages. Roads in several areas may be closed, along with property damage in urban or low lying spots due to runoff. Landslides may also occur in areas with steep terrain.
ADDITIONAL DETAILS
- Low pressure will develop west of the islands and draw abundant moisture northward as it strengthens during the next couple of days. This will bring potential for heavy rain and thunderstorms leading to flash flooding over all Hawaiian islands.
Recommendations
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
