HONOLULU (HawaiiNewsNow) - The National Weather Service in Honolulu has expanded a Flash Flood Watch to all Hawaiian islands until 6 p.m. Tuesday.
A very moist air mass to the northeast of Kilo is spreading across the state. This tropical moisture interacting with island terrain will produce localized, intense and slow moving downpours that may lead to flash flooding. The muggy airmass could remain over the islands for at least the first half of the week.
The moisture also will bring dew point temperatures into the 70s. This means that sweat does not evaporate as quickly and your body won't release heat efficiently. If you are taking part in strenuous outdoor activities, make sure to drink plenty of non-alcoholic fluids.
The moisture could also allow for thunderstorms to develop. If you are going outside, be aware of the threat posed by lightning, and that lightning can strike even if it isn't raining where you are.
A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash Flooding is very dangerous. Never drive into areas where water covers the road.