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Wireless Emergency Alert Criteria and Wording Changes for Flash Flood Warnings
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Outreach / Education
All Forecast Regions
The National Weather Service is proposing a plan to limit Wireless Emergency Alerts (WEA) to only those Flash Flood Warnings (FFW) with the damage threat tags of "Considerable" or "Catastrophic" and to modify the wording of the message accordingly. The new Impact-Based Warning format for FFWs will include machine-readable tags to characterize the flash flood damage threat, source information, and causative event. The flash flood damage threat characterization will 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. Characterization of the flash flood damage threat will allow the National Weather Service (NWS) to issue WEAs for those warnings with “Considerable” or “Catastrophic” tags. The text of these alerts will reflect the severity of the threat by including flash flood emergency language where warnings tags indicate “Catastrophic” damage is likely.
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Last edit date to this meta-data: 2020-02-14