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Monitoring of concurrent, co-located tornado and flash flood (TORFF) warnings

Below is the most recent image showing overlapping tornado and flash flood warning polygons thus far in 2020. Warnings are shown if they overlap in space and are valid within 30 minutes of one another, calculated as described in Nielsen et al. (2015, Weather and Forecasting). The images are updated once per day at approximately 1045 UTC. The images are zoomed in on the region where overlapping TORFF warnings are most frequently observed.

Images last updated 1130 UTC Saturday February 22 2020. (click image to embiggen)

The ten most recent TORFF overlapping warnings in 2020 are:

GSP issued TOR warning at: 202002061824 and FF warning at: 202002061827
CAE issued TOR warning at: 202002061818 and FF warning at: 202002061827
RAH issued TOR warning at: 202002061612 and FF warning at: 202002061622
GSP issued TOR warning at: 202002061555 and FF warning at: 202002061540
GSP issued TOR warning at: 202002061528 and FF warning at: 202002061503
GSP issued TOR warning at: 202002061524 and FF warning at: 202002061540
GSP issued TOR warning at: 202002061510 and FF warning at: 202002061503
FFC issued TOR warning at: 202002061316 and FF warning at: 202002061302
FFC issued TOR warning at: 202002061316 and FF warning at: 202002061312
PAH issued TOR warning at: 202001111340 and FF warning at: 202001111329

Download the text file with the details of this year's overlapping warnings.

All TORFF Warning Intersections (n=3843) from 2008-2018:

TORFF Warning Intersections for Select U.S. Tropical Cyclones:

Select a Storm:

This research is sponsored by NOAA grant NA15OAR4590233, in support of the 2016 VORTEX-SE field campaign.