Satellite observations of global aerosol and air quality events, including wildfires, dust storms, and haze. Featuring NOAA satellite products from the AerosolWatch website (https://www.star.nesdis.noaa.gov/smcd/spb/aq/AerosolWatch/).https://bsky.app/profile/aerosolwatch.bsky.socialhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lzy7kdk7k223Smoke from ongoing wildfires in the Pacific NW pushed daily-average PM2.5 air quality above the US health standard on 28 Sep in northern ID, southwestern OR & central-northern WA, per regulatory monitors & estimated by the VIIRS sensor on @noaa.gov satellites. @saramelinda.bsky.social29 Sep 2025 14:23 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzy7kdk7k223https://bsky.app/profile/aerosolwatch.bsky.social/post/3lzqrdmqtfs24Many wildfires were still burning in the US Pacific Northwest & western Canada on 25 Sep, including relatively intense wildfires in Washington State, measured by fire radiative power (yellow/orange markers) from the VIIRS sensor on @noaa.gov NOAA-21. @mparrington.bsky.social @weatherwest.bsky.social26 Sep 2025 15:20 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzqrdmqtfs24https://bsky.app/profile/aerosolwatch.bsky.social/post/3lzoh6bjijc24Check out our group's recently published paper in JGR - Atmospheres on the "TEMPO Aerosol Optical Depth and Aerosol Layer Height Retrieval Algorithm"! https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JD04408225 Sep 2025 17:13 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzoh6bjijc24https://bsky.app/profile/aerosolwatch.bsky.social/post/3lzo3xgpg6c24Smoke from ongoing wildfires in Washington State degraded PM2.5 air quality again on 24 Sep. Daily average conditions reached Very Unhealthy (Code Purple) in Leavenworth & Wenatchee, observed by regulatory monitors (dots) & estimated by @noaa.gov satellites (shading). @saramelinda.bsky.social25 Sep 2025 13:52 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzo3xgpg6c24https://bsky.app/profile/aerosolwatch.bsky.social/post/3lzmfhlydts24Thick smoke (purple shading) from wildfires in Washington State blew northward into British Columbia, Canada yesterday 23 Sep, observed by the VIIRS sensor on the @noaa.gov NOAA-21 satellite. @saramelinda.bsky.social @mparrington.bsky.social24 Sep 2025 21:37 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzmfhlydts24https://bsky.app/profile/aerosolwatch.bsky.social/post/3lzjugpdsik2vThe ABI sensor on the @noaa.gov GOES-West satellite is observing thick smoke from ongoing wildfires in Washington State today 23 Sep. The smoke is seriously degrading PM2.5 air quality per surface regulatory monitors (orange & purple dots).23 Sep 2025 21:27 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lzjugpdsik2vhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lz4mqfqbq22eWildfires in northwestern Washington State and southern British Columbia emitted thick smoke (purple shading) that reached into western Alberta yesterday 17 Sep, detected by the VIIRS sensor on the NOAA-20 satellite. @noaa.gov @saramelinda.bsky.social @mparrington.bsky.social18 Sep 2025 15:04 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lz4mqfqbq22ehttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lz2azahvrk2eThe VIIRS sensor on the NOAA-21 satellite detected a plume of thick Saharan dust (brown shading) blowing off the coast of West Africa & over the Atlantic Ocean yesterday 16 Sep. @dustycryder.bsky.social @mparrington.bsky.social17 Sep 2025 16:29 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lz2azahvrk2ehttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lyktsdismc2eAerosol optical depth (AOD) from the ABI sensor on the @noaa.gov GOES-East satellite observed moderately thick to very thick wildfire smoke (AOD ≥0.6) in between clouds over the US Pacific Northwest & southern British Columbia, Canada on 10 Sep.11 Sep 2025 13:23 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lyktsdismc2ehttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lyfz7yz53c2aAnother day of intense burning by California's Garnet Fire spread Hazardous (Code Maroon), Very Unhealthy (Code Purple) & Unhealthy (Code Red) daily PM2.5 air quality into western Nevada on 8 Sep, observed by regulatory monitors (dots) & estimated by @noaa.gov VIIRS (shading). @usfs.bsky.social09 Sep 2025 15:17 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lyfz7yz53c2ahttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lydgsd6krc2jThick smoke from the Garnet Fire in California’s Sierra National Forest caused Very Unhealthy (Code Purple) to Unhealthy (Code Red) daily PM2.5 air quality on 7 Sep, observed by regulatory monitors (dots) & estimated by VIIRS (shading). @usfs.bsky.social @calfire.bsky.social @noaa.gov08 Sep 2025 14:41 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lydgsd6krc2jhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lydeuduavc2jThe VIIRS sensor on the @noaa.gov NOAA-21 satellite measured intense burning of the Garnet Fire in California’s Sierra National Forest on 7 Sep, shown by the orange markers (Fire Radiative Power). The wildfire’s thick smoke blew northeast into Nevada. @calfire.bsky.social @usfs.bsky.social08 Sep 2025 14:07 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lydeuduavc2jhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3ly43hlzyic22The new @noaa.gov Aerosol Layer Height product from TEMPO indicates the thick wildfire smoke reaching the eastern US this morning is >2 km aloft in the atmosphere (maroon/purple/pink shading), and therefore having minimal impacts on surface air quality. @avoiland.bsky.social @mparrington.bsky.social05 Sep 2025 16:30 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3ly43hlzyic22https://bsky.app/profile/aerosolwatch.bsky.social/post/3ly3zrxiajs2bYesterday’s thick, brown-colored smoke, originating from wildfires in the western US & Canada, has reached the eastern US this morning 5 Sep. Hybrid smoke detection from the TEMPO & ABI sensors shows the smoke (dark purple) as of ~13 UTC. @noaa.gov @avoiland.bsky.social @mparrington.bsky.social05 Sep 2025 16:00 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3ly3zrxiajs2bhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxzzmlwgh22aThe ABI sensor on the @noaa.gov GOES-East satellite is observing thick, brown-colored wildfire smoke moving southeastward over the Pacific Northwest and Central Plains of the US this afternoon 4 Sep, impacting hourly PM2.5 air quality (colored dots).04 Sep 2025 20:52 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxzzmlwgh22ahttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxzcgbzalk23Thick smoke (red shading) from large wildfires in the US states of CA, ID, OR & WA, as well as in British Columbia, Canada, spread across parts of the western US yesterday 3 Sep, shown by aerosol optical depth from the VIIRS sensor on the @noaa.gov NOAA-21 satellite. @mparrington.bsky.social04 Sep 2025 13:57 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxzcgbzalk23https://bsky.app/profile/aerosolwatch.bsky.social/post/3lxx5ekq54k2fThe ABI sensor on the @noaa.gov GOES-East satellite is observing wildfire smoke degrading hourly PM2.5 air quality (colored dots) across the US Pacific NW & Upper Midwest this morning 3 Sep. @mparrington.bsky.social03 Sep 2025 17:21 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxx5ekq54k2fhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxudo3g6as2fAnother episode of long-range wildfire smoke transport is underway. The VIIRS sensor on the @noaa.gov NOAA-20 satellite shows smoke (pink/purple) from fires in western Canada & US stretching across the continent to the Labrador Sea yesterday 1 Sep. @mparrington.bsky.social02 Sep 2025 14:35 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxudo3g6as2fhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxfnypyimk2aWildfires in the western US continued burning on 26 Aug, observed by @noaa.gov VIIRS on NOAA-20. Fire radiative power (FRP, Left) shows the fires' location & intensity, and aerosol detection (Right) indicates the fires released thick smoke (purple). @saramelinda.bsky.social @mparrington.bsky.social27 Aug 2025 18:30 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxfnypyimk2ahttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxcq3usx5s2eNumerous wildfires in the Western US continued burning yesterday 25 Aug. UV Aerosol Index from the TEMPO satellite sensor “sees” smoke above clouds, highlighting plumes from fires in Oregon, Idaho & Wyoming (red, orange, yellow, green shading). @avoiland.bsky.social @saramelinda.bsky.social26 Aug 2025 14:30 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxcq3usx5s2ehttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lxafbnoays2xAerosol optical depth (AOD) from the VIIRS sensor on the @noaa.gov NOAA-21 satellite observed thick smoke (dark red shading, AOD ≥1) across the Western US on 23 Aug from numerous wildfires, particularly in Idaho, Montana & Wyoming. @saramelinda.bsky.social @sangasso.bsky.social25 Aug 2025 16:11 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lxafbnoays2xhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lwynl5bkyk26Smoke from the Island Creek wildfire in Idaho degraded daily PM2.5 air quality yesterday 21 Aug, with Unhealthy (Code Red) conditions near the fire & Moderate (Code Yellow) further downwind; observed by regulatory monitors (dots) & estimated from @noaa.gov VIIRS (shading). @saramelinda.bsky.social22 Aug 2025 14:18 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwynl5bkyk26https://bsky.app/profile/aerosolwatch.bsky.social/post/3lwwgngeafk2mAerosol optical depth from the VIIRS sensor on the @noaa.gov NOAA-21 satellite observed smoke (red/orange/yellow/teal shading, AOD ≥0.5) across the Iberian Peninsula today 21 Aug from the ongoing wildfires in Portugal & Spain. @mparrington.bsky.social @pierremarkuse.bsky.social @aprados1.bsky.social21 Aug 2025 17:09 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwwgngeafk2mhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lwtufdjnyc27Aerosol optical depth (AOD) from the ABI sensor on the @noaa.gov GOES-East satellite observed smoke (teal/yellow/orange/red shading) from a wildfire in Broward County, FL blowing offshore near Miami, in the periphery of Hurricane Erin’s circulation, this morning 20 Aug.20 Aug 2025 16:37 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwtufdjnyc27https://bsky.app/profile/aerosolwatch.bsky.social/post/3lwohp4uunc2lVIIRS on @noaa.gov NOAA-20 satellite observed the Long Lake wildfire in Nova Scotia, Canada, yesterday 17 Aug. Fire Radiative Power (FRP, small yellow dots) indicates the intensity of burning & smoke detection (pink/purple shading) shows the smoke plume blowing northeast. @mparrington.bsky.social18 Aug 2025 13:06 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwohp4uunc2lhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lwh6llmoys2dThis year's Amazon fire season has been relatively quiet so far, but that may be changing as VIIRS on the @noaa.gov NOAA-21 satellite observed numerous thick smoke plumes (purple) on 14 Aug from burning in Amazonas, Brazil, between Manaus & Porto Velho. @aprados1.bsky.social @sangasso.bsky.social15 Aug 2025 15:35 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwh6llmoys2dhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lweliez2ac2aAerosol optical depth from the VIIRS sensor on the @noaa.gov NOAA-20 satellite shows thick smoke (red shading) across the Pacific Northwest on 13 Aug from numerous wildfires in Washington State, Idaho & Vancouver Island, British Columbia. @saramelinda.bsky.social @mparrington.bsky.social14 Aug 2025 14:48 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lweliez2ac2ahttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lwcoacd3xk2aAerosol detection from VIIRS on the NOAA-20 satellite highlights thick smoke plumes (purple shading) yesterday 12 Aug from the Bear Gulch Fire in the Olympic National Forest of Washington State & from a large wildfire on Vancouver Island, British Columbia. @noaa.gov @mparrington.bsky.social13 Aug 2025 20:32 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lwcoacd3xk2ahttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lw7kh7y4w22mTransported smoke from Canadian wildfires caused Code Red (Unhealthy) and Orange (Unhealthy for Sensitive Groups) daily PM2.5 air quality in MN, ND & SD yesterday 11 Aug. @noaa.gov satellite-estimated PM2.5 (shading) fills gaps in the AirNow PM2.5 regulatory monitor network (dots).12 Aug 2025 14:46 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lw7kh7y4w22mhttps://bsky.app/profile/aerosolwatch.bsky.social/post/3lw4zoewkxc2mMore wildfire smoke moved into the US Upper Midwest yesterday 10 Aug, causing Code Red (Unhealthy) daily PM2.5 air quality across ND & prompting Air Quality Alerts for today 11 Aug in MN & the UP of MI. @noaa.gov VIIRS aerosol detection highlights the thick smoke (dark purple). @avoiland.bsky.social11 Aug 2025 14:40 +0000at://did:plc:bbg4yi62hgcuz2l2q5bfgdbe/app.bsky.feed.post/3lw4zoewkxc2m