![]() ![]() When forecasters see the number of lightning strikes rapidly increasing, it’s a sign that a storm is intensifying and becoming more dangerous. The new GLM “Flash Extent Density” product will allow the National Weather Service to see how frequently lightning is occurring over a certain area. Lightning data from the GLM can also help forecasters better pinpoint which parts of a thunderstorm are most severe based on the density (concentration) of flashes over a particular area. The earlier we can detect lightning, the more time forecasters have to monitor a thunderstorm, and issue severe thunderstorm warnings. ![]() to detect cloud-to-ground and intra-cloud lightning flashes, the GLM offers much greater spatial coverage, and in many cases detects lightning flashes before ground-based lightning detection systems. While the National Lightning Detection Network uses more than 100 ground-based stations across the U.S. On July 16, a new tool from the lightning mapper will be rolled out to National Weather Service forecast offices across the nation, giving forecasters a valuable new tool for tracking severe thunderstorms. Until now, all those flashy lightning animations we've seen from the GOES East satellite haven't been used in operational weather forecasts. The GLM is the first optical lightning detector on-board a satellite in geostationary orbit, and is the first of four instruments that will provide lightning mapping over most of the Western Hemisphere through 2036. The groundbreaking instrument on-board the NOAA GOES East (GOES-16) satellite has allowed us to see lightning from space like never before, mapping cloud-to-ground, cloud-to-cloud, and intra-cloud lightning from more than 22,000 miles above Earth. The NWS Radar page and NWS Satellite page also are available.That’s where the Geostationary Lightning Mapper (GLM) comes in. The URL should auto-update with the current settings, allowing for an easy bookmark/favorite. Īdditional URL parameters include lt (center latitude), ln (center longitude), zm (zoom level, 0-12), nolabel (removes flight category icon ID labels), hidemenu (hides the menu options on the lower left), wide (thicken US state boundaries), county (include US counties and other political boundaries based on zoom level), hidefir (hide FIR boundary), zseareas (add the ZSE ARTCC areas), and start (UTC start date/time, YYYYMMDDhhmm format, AWC data goes back up to 2 days, GLM data up to 5 hours). To expand the radar map, keeping the menus/options above and legend below, click ⟺ (include "&invert" in the URL to reverse the background/text colors). To toggle the lower-left menu visible/hidden, click the ≪ or ≫ button. Left-clicking on the "Speed" area will slow the loop and right-clicking will accelerate the loop, ranging from 0.05 to 5 second interval. When both the flight category and weather are displayed, the flight category icon will be on the inside and the partially-transparent weather color on the outside.Ĭlicking on the map will start/stop the loop. ![]() Also, GeoColor images may occasionally miss a frame or two. On the GeoColor satellite images (GOES-West/East cutoff at -114°) the pale bule areas are nighttime areas of lower clouds. The radar, lightning, visible satellite, IR satellite, GeoColor satellite, SIGMETs/CWAs, and flight categories/weather can be toggled on/off. The above loop uses radar and visible/IR satellite data obtained from Aviation Weather Center (AWC), GeoColor satellite data from NOAA NESDIS-STAR, lightning (GLM) data from NOAA nowCOAST, and observations (for flight category and weather) from MesoWest. ![]()
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