Daytime True Color RGB + Nighttime Microphysics RGB images from #GOES18/GOESWest showed glacial silt being transported offshore from the Copper River Delta in Southcentral Alaska - for at least the past 13 days. Full resolution: cimss.ssec.wisc.edu/satellite-bl... @sangasso.bsky.social
December 23, 2025 at 6:57 PM
Daytime True Color RGB + Nighttime Microphysics RGB images from #GOES18/GOESWest showed glacial silt being transported offshore from the Copper River Delta in Southcentral Alaska - for at least the past 13 days. Full resolution: cimss.ssec.wisc.edu/satellite-bl... @sangasso.bsky.social
Daytime True Color + Nighttime Microphysics RGB images from @noaa.gov #GOES18/#GOESWest showed the 29-day evolution of the recent long-duration Tule fog event across much of the Central Valley of California (from 21 November to 19 December). Full resolution: cimss.ssec.wisc.edu/satellite-bl... #CAwx
December 20, 2025 at 11:29 PM
Daytime True Color + Nighttime Microphysics RGB images from @noaa.gov #GOES18/#GOESWest showed the 29-day evolution of the recent long-duration Tule fog event across much of the Central Valley of California (from 21 November to 19 December). Full resolution: cimss.ssec.wisc.edu/satellite-bl... #CAwx
10-minute @noaa.gov #GOES18/#GOESWest Nighttime Microphysics RGB + daytime True Color RGB images showed a plume of resuspended volcanic ash (*not a current eruption*) being transported SW from Mount Shishaldin on Unimak Island in the eastern Aleutians: geosphere.ssec.wisc.edu#playing:true...; #AKwx
December 13, 2025 at 9:18 PM
10-minute @noaa.gov #GOES18/#GOESWest Nighttime Microphysics RGB + daytime True Color RGB images showed a plume of resuspended volcanic ash (*not a current eruption*) being transported SW from Mount Shishaldin on Unimak Island in the eastern Aleutians: geosphere.ssec.wisc.edu#playing:true...; #AKwx
1-minute @noaa.gov #GOES18/#GOESWest True Color RGB images showed a hazy plume of resuspended volcanic ash (*from the 1912 eruption of Novarupta-Katmai*) as it was being transported across the Shelikof Strait toward Kodiak Island: geosphere.ssec.wisc.edu#playing:true...; #AKwx
December 12, 2025 at 10:59 PM
1-minute @noaa.gov #GOES18/#GOESWest True Color RGB images showed a hazy plume of resuspended volcanic ash (*from the 1912 eruption of Novarupta-Katmai*) as it was being transported across the Shelikof Strait toward Kodiak Island: geosphere.ssec.wisc.edu#playing:true...; #AKwx
In fact, at 1856 UTC it first exhibited a Shortwave Infrared brightness temperature of 137.88ºC -- which is the saturation temperature of the #GOES18/#GOESWest ABI Band 7 detectors.
December 7, 2025 at 12:08 AM
In fact, at 1856 UTC it first exhibited a Shortwave Infrared brightness temperature of 137.88ºC -- which is the saturation temperature of the #GOES18/#GOESWest ABI Band 7 detectors.
The summit of #Kilauea exhibited a very robust thermal signature in #GOES18/#GOESWest Shortwave Infrared imagery -- which was briefly masked by the dense volcanic cloud.
December 6, 2025 at 11:55 PM
The summit of #Kilauea exhibited a very robust thermal signature in #GOES18/#GOESWest Shortwave Infrared imagery -- which was briefly masked by the dense volcanic cloud.
#GOES18/#GOESWest True Color RGB images: geosphere.ssec.wisc.edu#playing:true...;
December 6, 2025 at 10:38 PM
#GOES18/#GOESWest True Color RGB images: geosphere.ssec.wisc.edu#playing:true...;
Impressive eruption of #Kilauea today, with a rare triple fountain event -- with @noaa.gov #GOES18/#GOESWest showing a combination of SO2 and SO2+ash clouds. #HIwx
December 6, 2025 at 10:21 PM
Impressive eruption of #Kilauea today, with a rare triple fountain event -- with @noaa.gov #GOES18/#GOESWest showing a combination of SO2 and SO2+ash clouds. #HIwx
Air Mass RGB images from @noaa.gov #GOES18/#GOESWest showed the leading edge of the SO2-rich #HayliGubbi volcanic cloud (brighter shades of magenta) as it moved eastward across the North Pacific Ocean (east of Japan).
November 26, 2025 at 7:46 PM
Air Mass RGB images from @noaa.gov #GOES18/#GOESWest showed the leading edge of the SO2-rich #HayliGubbi volcanic cloud (brighter shades of magenta) as it moved eastward across the North Pacific Ocean (east of Japan).
( #NOAASatellites): The LONG #PolarNight has begun in the United States' northernmost city— #Utqiaġvik, #Alaska!
Yesterday, @noaa.gov's #GOESWest ( #GOES18) 🛰️ captured the LAST #sunset of the year in Utqiaġvik. The sun will rise above the horizon again in about 64 days on January 22, 2026. #wxsky
Yesterday, @noaa.gov's #GOESWest ( #GOES18) 🛰️ captured the LAST #sunset of the year in Utqiaġvik. The sun will rise above the horizon again in about 64 days on January 22, 2026. #wxsky
November 19, 2025 at 10:23 PM
( #NOAASatellites): The LONG #PolarNight has begun in the United States' northernmost city— #Utqiaġvik, #Alaska!
Yesterday, @noaa.gov's #GOESWest ( #GOES18) 🛰️ captured the LAST #sunset of the year in Utqiaġvik. The sun will rise above the horizon again in about 64 days on January 22, 2026. #wxsky
Yesterday, @noaa.gov's #GOESWest ( #GOES18) 🛰️ captured the LAST #sunset of the year in Utqiaġvik. The sun will rise above the horizon again in about 64 days on January 22, 2026. #wxsky
A thermal signature of the launch of @eumetsat.int #Sentinel6B (from Vandenberg Space Force Base, California) was seen in many of the 16 ABI spectral bands of @noaa.gov #GOES18/#GOESWest.
November 17, 2025 at 4:47 PM
A thermal signature of the launch of @eumetsat.int #Sentinel6B (from Vandenberg Space Force Base, California) was seen in many of the 16 ABI spectral bands of @noaa.gov #GOES18/#GOESWest.
Water Vapor images from #GOES18/#GOESWest with plots of 30-minute peak wind gusts (kts). Notable gusts included 80 kts (92 mph) at St. George in the Bering Sea (0700 UTC) and 75 kts (86 mph) at Cape Newenham on the SW coast of Alaska (1000 UTC). #AKwx
October 12, 2025 at 5:09 PM
Water Vapor images from #GOES18/#GOESWest with plots of 30-minute peak wind gusts (kts). Notable gusts included 80 kts (92 mph) at St. George in the Bering Sea (0700 UTC) and 75 kts (86 mph) at Cape Newenham on the SW coast of Alaska (1000 UTC). #AKwx
Thermal signatures of the Chevron #ElSegundo refinery fire near Los Angeles (on Thursday evening) were apparent in #GOES18/#GOESWest imagery and derived products -- more on the CIMSS Satellite Blog: cimss.ssec.wisc.edu/satellite-bl...
October 4, 2025 at 3:04 AM
Thermal signatures of the Chevron #ElSegundo refinery fire near Los Angeles (on Thursday evening) were apparent in #GOES18/#GOESWest imagery and derived products -- more on the CIMSS Satellite Blog: cimss.ssec.wisc.edu/satellite-bl...
#GOES18/#GOESWest True Color RGB images revealed another well-defined episode of resuspended volcanic ash (from the 1912 eruption of Novarupta-Katmai) being transported across the Shelikof Strait and over parts of Kodiak Island: geosphere.ssec.wisc.edu#playing:true...; #AKwx
September 23, 2025 at 3:17 AM
#GOES18/#GOESWest True Color RGB images revealed another well-defined episode of resuspended volcanic ash (from the 1912 eruption of Novarupta-Katmai) being transported across the Shelikof Strait and over parts of Kodiak Island: geosphere.ssec.wisc.edu#playing:true...; #AKwx
Strong E-SE winds in the vicinity of #MountStHelens were resuspending loose surface volcanic ash that remained from the 1980 eruptions, and transporting it to the W-NW -- as seen in NOAA #GOES18/#GOESWest True Color RGB images: geosphere.ssec.wisc.edu#playing:true...; #WAwx
September 16, 2025 at 8:00 PM
Strong E-SE winds in the vicinity of #MountStHelens were resuspending loose surface volcanic ash that remained from the 1980 eruptions, and transporting it to the W-NW -- as seen in NOAA #GOES18/#GOESWest True Color RGB images: geosphere.ssec.wisc.edu#playing:true...; #WAwx
10-minute Full Disk scan #GOES18/#GOESWest True Color RGB images showed the hazy plume of resuspended ash from the 1912 eruption of Novarupta/Katmai -- which was being transported across Shelikof Strait toward Kodiak Island. geosphere.ssec.wisc.edu#playing:true...; #AKwx
September 12, 2025 at 2:18 AM
10-minute Full Disk scan #GOES18/#GOESWest True Color RGB images showed the hazy plume of resuspended ash from the 1912 eruption of Novarupta/Katmai -- which was being transported across Shelikof Strait toward Kodiak Island. geosphere.ssec.wisc.edu#playing:true...; #AKwx
Hurricane #Kiko rapidly intensified to a Category 4 storm on 03 September, as shown by 1-minute #GOES18/#GOESWest Visible and Infrared images (with an overly of GLM Flash Points). More details on the CIMSS Satellite Blog: cimss.ssec.wisc.edu/satellite-bl...
September 4, 2025 at 8:51 AM
Hurricane #Kiko rapidly intensified to a Category 4 storm on 03 September, as shown by 1-minute #GOES18/#GOESWest Visible and Infrared images (with an overly of GLM Flash Points). More details on the CIMSS Satellite Blog: cimss.ssec.wisc.edu/satellite-bl...
1-minute #GOES18/#GOESWest Infrared images (combined with the Fire Mask derived product) showed that the #DollarLakeFire in northwest Wyoming produced a notable #pyrocumulonimbus cloud (shades of blues to reds) that drifted E across the state and over western South Dakota. #WYwx
August 23, 2025 at 3:34 AM
1-minute #GOES18/#GOESWest Infrared images (combined with the Fire Mask derived product) showed that the #DollarLakeFire in northwest Wyoming produced a notable #pyrocumulonimbus cloud (shades of blues to reds) that drifted E across the state and over western South Dakota. #WYwx
True Color RGB images from #GOES18/#GOESWest showed a plume of resuspended ash (from the 1912 eruption of Novarupta-Katmai) that was being lofted by strong NW winds & transported across the Shelikof Strait & Kodiak Island, emerging over the Gulf of Alaska: geosphere.ssec.wisc.edu#playing:true...;
August 16, 2025 at 2:35 AM
True Color RGB images from #GOES18/#GOESWest showed a plume of resuspended ash (from the 1912 eruption of Novarupta-Katmai) that was being lofted by strong NW winds & transported across the Shelikof Strait & Kodiak Island, emerging over the Gulf of Alaska: geosphere.ssec.wisc.edu#playing:true...;
Infrared images (combined with the Fire Mask derived product) from @nws.noaa.gov NOAA #GOES18/#GOESWest showed that the #MonroeCanyonFire in southern Utah produced a #pyrocumulonimbus cloud yesterday evening. #UTwx h/t @mnstorm.bsky.social
August 14, 2025 at 4:55 PM
Infrared images (combined with the Fire Mask derived product) from @nws.noaa.gov NOAA #GOES18/#GOESWest showed that the #MonroeCanyonFire in southern Utah produced a #pyrocumulonimbus cloud yesterday evening. #UTwx h/t @mnstorm.bsky.social
1-minute @nws.noaa.gov NOAA #GOES18/#GOESWest Infrared & Visible images (combined with the Fire Mask derived product) showed that the #LeeFire in northwest Colorado produced a #pyrocumulonimbus cloud (Infrared shades of blues to reds) just before sunset on 08 August. #COwx h/t @mnstorm.bsky.social
August 9, 2025 at 5:20 PM
1-minute @nws.noaa.gov NOAA #GOES18/#GOESWest Infrared & Visible images (combined with the Fire Mask derived product) showed that the #LeeFire in northwest Colorado produced a #pyrocumulonimbus cloud (Infrared shades of blues to reds) just before sunset on 08 August. #COwx h/t @mnstorm.bsky.social
5-minute @nws.noaa.gov NOAA Satellites #GOES18/#GOESWest Infrared & Visible images (+ the Fire Mask derived product) showed that the #BroncoFire in Arizona produced a #pyrocumulonimbus cloud (shades of blues to reds on Infrared imagery). #AZwx
August 8, 2025 at 12:55 AM
5-minute @nws.noaa.gov NOAA Satellites #GOES18/#GOESWest Infrared & Visible images (+ the Fire Mask derived product) showed that the #BroncoFire in Arizona produced a #pyrocumulonimbus cloud (shades of blues to reds on Infrared imagery). #AZwx
Nighttime Microphysics RGB and daytime True Color RGB images from #GOES18/#GOESWest revealed the cyclonic circulation of an actinoform cloud feature as it passed just north of the Hawaiian Islands on 30 July.
July 31, 2025 at 2:49 AM
Nighttime Microphysics RGB and daytime True Color RGB images from #GOES18/#GOESWest revealed the cyclonic circulation of an actinoform cloud feature as it passed just north of the Hawaiian Islands on 30 July.
1-minute #GOES18/#GOESWest Infrared (+ the Fire Mask derived product) & Visible images showed that the #DragonBravoFire in Arizona produced 3 #pyrocumulonimbus clouds (-40s C, shades of blue in the Infrared images) late in the day on 27 July. #AZwx h/t @mnstorm.bsky.social
July 28, 2025 at 1:59 AM
1-minute #GOES18/#GOESWest Infrared (+ the Fire Mask derived product) & Visible images showed that the #DragonBravoFire in Arizona produced 3 #pyrocumulonimbus clouds (-40s C, shades of blue in the Infrared images) late in the day on 27 July. #AZwx h/t @mnstorm.bsky.social
1-minute #GOES18/#GOESWest Infrared (with the Fire Mask derived product) and Visible images showed that the #MonroeCanyonFire in Utah produced 2 #pyrocumulonimbus clouds (shades of blue in the infrared images) late in the day on 25 July: cimss.ssec.wisc.edu/satellite-bl... h/t @mnstorm.bsky.social
July 26, 2025 at 6:07 PM
1-minute #GOES18/#GOESWest Infrared (with the Fire Mask derived product) and Visible images showed that the #MonroeCanyonFire in Utah produced 2 #pyrocumulonimbus clouds (shades of blue in the infrared images) late in the day on 25 July: cimss.ssec.wisc.edu/satellite-bl... h/t @mnstorm.bsky.social