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Category: GLM

Heavy Rain and lightning over American Samoa

National Weather Service Pago Pago Facebook posts on 11 December describe an atmosphere primed for heavy rain and lightning, the latter Facebook also shown below. Band 13 animation, above, shows persistent deep convection over the Samoan Islands. The convection develops and drifts southward.MIMIC Total Precipitable Water over the south Pacific shows... Read More

30-second imagery of severe thunderstorms across the Mid-South and Deep South

Overlapping 1-minute Mesoscale Domain Sectors from GOES-16 (GOES-East) provided imagery at 30-second intervals during an outbreak of severe thunderstorms (SPC Storm Reports) across parts of the Mid-South and Deep South on 09 December 2023. “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) included time-matched plots of SPC Storm Reports for a  thunderstorm that produced a... Read More

Lake Erie lake effect snow band produces thundersnow in western New York

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Day Cloud Phase Distinction RGB images with an overlay of GLM Flash Extent Density (above) showed a glaciating (brighter shades of green) to glaciated (pale shades of yellow) lake effect snow (LES) band streaming inland off Lake Erie on 17 November 2023. There were 4 brief periods of lightning activity seen just south of the Buffalo,... Read More