A Flash Flood Warning is issued when a flash flood is imminent or occurring. If you are in a flood prone area move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours to develop.

A Flash Flood Watch is issued to indicate current or developing conditions that are favorable for flash flooding. The occurrence is neither certain nor imminent. A watch is typically issued within several hours to days ahead of the onset of possible flash flooding. +

The NWS Alerts site provides watches, warnings, advisories, and similar products. Visit NWS Common Alerting Protocol for CAP v1.2 for updated documentation. It is recommended to start by selecting your location. Selecting search without a location will assume all locations.

Flash floods become raging torrents of water, ripping through neighborhoods, streets, valleys, etc. sweeping away whatever is in their path. Flash floods can also occur with a dam or levee failure. Heavy rain should be a signal that alerts you to the possibility of dangerous flood conditions.

With this change to impact-based FFWs, the NWS is aiming to improve the public response to Flash Flood Warnings by providing easily readable information and issuing WEA alerts only for flash flood events that require immediate life-saving action.

what is flash flooding? Flooding that begins within 6 hours, and often within 3 hours, of the heavy rainfall (or other cause). Flash Floods can be caused by a number of things, but is most often due to extremely heavy rainfall from thunderstorms.

The following products are the most recent watches/warnings/advisories/statements that have been issued by the Weather Forecast Office in Honolulu, HI for the state of Hawaii, and the surrounding waters.

A Flash Flood Warning means that flash flooding has been reported or is imminent. When a Flash Flood Warning is issued for your area, act quickly. If advised to evacuate, do so immediately.

Jun 2, 2009 · Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

Jan 21, 2025 · A Flood or Flash Flood Warning is issued to inform the public that flooding is imminent or in progress. It focuses on specific counties, communities, streams, or areas. Flash Flood Warnings are issued for flooding usually occurring within 6 hours of heavy rain.