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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 2018. 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 1031 UTC Monday April 23 2018. (click image to embiggen)

The ten most recent TORFF overlapping warnings are:

JAN issued TOR warning at: 201804140921 and FF warning at: 201804140927
JAN issued TOR warning at: 201804070109 and FF warning at: 201804070113
JAN issued TOR warning at: 201804070103 and FF warning at: 201804070113
JAN issued TOR warning at: 201804062348 and FF warning at: 201804070018
RLX issued TOR warning at: 201804032210 and FF warning at: 201804032217
ILN issued TOR warning at: 201804032204 and FF warning at: 201804032217
ILN issued TOR warning at: 201804032158 and FF warning at: 201804032217
ILN issued TOR warning at: 201804032104 and FF warning at: 201804032036
ILN issued TOR warning at: 201804032042 and FF warning at: 201804032036
ILN issued TOR warning at: 201804032001 and FF warning at: 201804031941

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

All TORFF Warning Intersections (n=3659) from 2008-2017:

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.