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Flash Flood Emergencies

16 Jul 2026 05:30 AM
The last half of the summer season often features slow moving thunderstorm complexes fed by ample amounts of atmospheric moisture and instability. Flash Flooding is a typical result with rain amounts exceeding rates that the landscape can manage. The main warning headline that the National Weather Service (NWS) has for this situation is the Flash Flood Warning. A messaging escalator that the NWS has is to tag especially dangerous flooding as a Flash Flood Emergency. Two such warnings were issued in Texas yesterday and one last week in Missouri. The IEM attempts to curate a list of these emergencies with the featured screenshot from the online tool that presents them on a map along with a tabling listing. A link to the raw data is available as a GeoJSON on the page or you can use the regular download portal to request a filtered dataset including just these events.

Voting:
Good: 8
Bad: 0
Abstain: 2

Tags:   emergency  

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Tornado + Flash Flood Emergency

06 Sep 2021 05:29 AM
The National Weather Service can place a special flag on both Tornado and Flash Flood Warnings to denote that they are emergency situations with an observed threat about to impact a populated location. A number of such emergencies were issued last week for post tropical storm Ida as it impacted the northeastern US. The Philadelphia NWS office had both a Tornado and Flash Flood Emergency active at the same time for Bucks County Pennsylvania. The featured table presents the IEM computed and unofficial instances whereby a given county was under a simultaneous Tornado and Flash Flood Emergency. The combination is very rare. The IEM has a page that lists out the emergency warning events.

Voting:
Good: 6
Bad: 0

Tags:   emergency