Harvey and GLM Lightning

August 25th, 2017 |

GOES-16 ABI Band 1 (0.47 µm) and color-coded GLM parallax-corrected observations of lightning groups for each 1 minute in the 5 minutes prior to the nominal time of the ABI image (red: oldest; yellow: latest), 1247-1332 UTC on 25 August 2017 (Click to enlarge)

GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing

The Geostationary Lightning Mapper (GLM) on GOES-16 allows observations of lightning associated with Hurricane Harvey in the Gulf of Mexico. The animation above, from 1247 to 1332 UTC on 25 August 2017, shows lightning group observations every minute, color-coded by time (red is the oldest, yellow is the most recent, corresponding to the nominal time of the ABI Image), superimposed on GOES-16 ABI Channel 1 Visible Imagery (0.47 µm). Most of the Hurricane lightning is in the outer bands of the storm, with very little in the central core. This distribution is not unusual.

(A similar animation from 1812-1857 UTC on 24 August 2017, when lightning was observed near the storm core, is here.)

(Thanks to Dave Santek, SSEC, for this animation!)

Added: The animation below (for 1352-1437 UTC on 25 August) is over simulated True-Color Imagery, and for this GLM plot, the latest 1-minute Groups plots (that correspond to the ABI Image time) are red, and the earliest are Yellow.

Simulated True Color Imagery from GOES-16 ABI and 1-minute GLM Group data overlain; red groups corresponding to the nominal image time and yellow groups are oldest, 1352-1437 UTC on 25 August 2017 (Click to enlarge)

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