Thursday, May 17, 2018

Local "Higher" Flash Extent Density on Low Lightning Day

The majority of the storms across the AMA forecast area today did not have very impressive lightning signatures/numbers on GLM, despite having storms with hail reported as large as half dollars. Most of the storms were slow developing intense cores. However, starting around 2232Z, one storm rapidly intensified and developed a forward speed more than double the average of storms so far today. During this ramp-up in intensity, the Flash Extent Density also spiked up. While not an especially high value (max 14 flashes on 2 minute sampling/1 minute update product), it was the most impressive seen today.

0.5 Degree AMA Reflectivity 2222Z-2253Z

GLM Flash Extent Density (2 minute sample/1 minute update) 2232Z-2254Z
Alex Brown

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