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Impact-based Warnings for Flash Floods
Data Mining Tool
Outreach / Education
All Forecast Regions
The Water Resources Service Program Team (SPT) is seeking to survey and implement the reformatting of Flash Flood Warnings (FFWs) into Impact-Based Warning (IBW) format. This consistent bulleted format will provide easily readable information describing the hazard (Flash Flood), the source of the information (e.g., radar, gauge, trained spotter, Emergency Manager) and a brief description of the impact of the hazard. It will also include machine-readable tags to characterize the flash flood damage threat, source information, and causative event. Characterization of the flash flood damage threat will allow the National Weather Service (NWS) to issue Wireless Emergency Alerts (WEA) for those warnings with "Considerable" or "Catastrophic" tags. FFW issuance using these tags will be implemented on NOAA Weather Radio and the Emergency Alert System (EAS) at a later date based on implementation of software modifications. The flash flood damage threat characterization shall include: Base - Most flash floods, with the potential for impacts and damage. Considerable - Flash floods capable of unusual severity of impact where urgent action is needed to protect lives and property. Catastrophic - Exceedingly rare, violent flash floods which threaten lives and cause disastrous damage when floodwaters are placing or will place people in life-threatening situations by rapidly rising to levels rarely, if ever, seen. Catastrophic flash flood damage threat tags will only appear in Flash Flood Warnings which include flash flood emergency language. The flash flood source characterization shall include: Radar indicated - Evidence on radar and near storm environment is supportive, but no confirmation. Observed - Flash flood impacts confirmed by trained spotters, law enforcement, media, other credible human observers, etc. The flash flood causative event characterization shall include: HEAVY RAIN...[##-## INCHES PER HOUR] - Use to identify rainfall rate leading to potential or observed flash flooding, including rain falling on a burn scar. [DAM or LEVEE] FAILURE...[IMMINENT or OCCURING] - Use to provide additional information about the status of the failing dam or levee, whether it is "imminent" or "occuring".
Product information and survey access
Point of Contact
Daniel Roman firstname.lastname@example.org
Document (e.g. PDD)
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Comment Start Date:
0000-00-00 Comment End Date: 0000-00-00
Last edit date to this meta-data: 2019-09-23