Severe thunderstorms are expected across portions of the central into southern Plains into Sunday, with large hail and severe gusts the main threats. The threat for heavy to excessive rainfall and possible flash flooding will return to the south-central U.S. Friday into this weekend. Read More >
Biggest takeaway:
Flash flooding in particular (rapidly rising & moving water) is a very deadly threat, killing more people than many other weather threats combined. Most people die from driving into water, or being drawn to the power/unusual nature of the water - kids want to play around it & adults want to get close & take pictures. One badly placed foothold can be grabbed by the torrent and pull the person in. Camping by a small stream or river is also very dangerous when flash flooding is possible. Intense flash flooding can also create landslides.
Warning/Trigger for Plan:
NWS Flash Flood Warning
…also may need actions for NWS Flood Warning (though inundation more gradual)
Advance Notice/Time to Activate & Accomplish Your Planned Response:
Typically 30-60 minutes
Frequency:
~0-5/year at various times of day & night.
How Accurate Warnings?
If there is flash flooding, there almost certainly will be a Flash Flood Warning issued beforehand. That said a little more than 1/3 are false alarms.