Spider Lightning Seen From Space by GOES East

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16 Apr 2018 3:12 PM
From NOAA When you spend 24/7/365 staring at Earth, you see some strange things. The NOAA GOES East satellite (GOES-16) witnessed a spectacular display of stratiform, or ‘spider’ lightning as it’s known, in October over the Central Plains. The GOES-R series of satellites (which includes GOES-16 and the recently launched GOES-17) are equipped with the new Geostationary Lightning Mapper - GLM - technology, allowing the satellite to capture imagery of lightning as never seen before. Check out this video to see the prolific spider lightning erupt over multiple states over several hours. The video above is from a storm system last October that produced extensive stratiform (or spider) lightning behind the main convective line.  This lightning connected vast regions of opposite charge within the thunderstorm clouds. These extensive lightning flashes often simultaneously strike the ground in multiple places miles apart. They also are known to trigger upward lightning from tall objects.The imagery in this video was created using snapshots from the satellite taken over the same location every five minutes. Ground photograph of 'Spider Lightning' These flashes are called spider lightning due to the pattern they create when they quickly creep and crawl from one cloud to another. These long, horizontally traveling flashes can be seen from Earth below the clouds when they are especially strong and bright. GOES East, along with the recently launched GOES-17 satellite, can ‘see’ the lightning flashes all the way from their orbital position 22,000 miles above the surface of the Earth using the GLM instrument. The GLM continually looks for lightning flashes in the Western Hemisphere. Along with the ABI instrument, the flash density can help forecasters observe the formation and intensification of storms.  Rapid increases of lightning are a signal that a storm is strengthening quickly and could produce severe weather. During heavy rain, GLM data can show when thunderstorms are stalled or if they are gathering strength. When combined with radar and other satellite data from geostationary and polar satellites, GLM data may help forecasters anticipate severe weather and issue flood and flash flood warnings sooner. In dry areas, especially in the western United States, information from the instrument will help forecasters, and ultimately firefighters, identify areas prone to wildfires sparked by lightning. NOAA GOES East wasn’t the only satellite in our fleet to capture this rare event shown above. The Day Night Band on board the polar orbiting NOAA/NASA Suomi NPP Satellite (*note this event occurred just before our new polar orbiting NOAA-20 satellite launched) was also able to observe lighting during this event. The Day Night Band can detect lightning flashes, which appear as bright streaks atop a nocturnal storm. While the DNB can’t detect how much lightning is happening, depending on the lightning flash rate of a storm, there is a chance that the Day Night Band might capture the in-cloud scattered light. Suomi NPP was able to capture these spider lightning strikes due to their extent and prolonged duration. Edited for WeatherNation by Meteorologist Mace Michaels
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