Oak Fire in California

July 24th, 2022 |

GOES-17 True Color RGB images [click to play animated GIF | MP4]

GOES-18 images shown in this blog post are preliminary and non-operational

GOES-17 (GOES-West) True Color RGB images created using Geo2Grid (above) showed the Oak Fire smoke plume as it spread northwestward across California on 24 July 2022. The Oak Fire has become the largest wildfire of California’s 2022 season.

Overlapping 1-minute GOES-18 Mesoscale Domain Sectors provided 30-second imagery — “Red” Visible (0.64 µm) images are shown below.

GOES-18 Visible (0.64 µm) images [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-17 “Red” Visible (0.64 µm), Shortwave Infrared (3.9 µm), Fire Power and Fire Temperature images (below) showed the thermal characteristics of the Oak Fire during the day. The Fire Temperature and Fire Power derived products are components of the GOES Fire Detection and Characterization Algorithm FDCA.

GOES-17 “Red” Visible (0.64 µm, top left), Shortwave Infrared (3.9 µm, top right), Fire Power (bottom left) and Fire Temperature (bottom right) images [click to play animated GIF | MP4]

Severe thunderstorms across the Upper Midwest

July 23rd, 2022 |

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animated GIF | MP4]

1-minute Mesosca’le Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) images (above) include plots of time-matched SPC Storm Reports — and showed a Mesoscale Convective System that moved east-southeastward across parts of South Dakota, Minnesota and Wisconsin on 23 July 2022.

GOES-16 “Clean” Infrared Window (10.35 µm) images (below) indicated that the coldest overshooting tops exhibited infrared brightness temperatures around -70 to -75ºC (white pixels within darker black enhancement).

GOES-16 “Clean” Infrared Window (10.35 µm) images, with time-matched SPC Storm Reports plotted in blue [click to play animated GIF | MP4]

Clear skies over the Great Lakes

July 21st, 2022 |
NOAA-20 VIIRS True-Color Imagery along with derived ACPSO SSTs and Surface Buoy Plots, all ca. 1820 UTC on 21 July 2022 (click to enlarge)

NOAA-20’s afternoon path on 21 July 2022 (here, from this site) allowed for a complete view of the Great Lakes, as shown here, and mostly clear skies meant that ACSPO Lake Surface Temperatures were produced; these are here, and also included in the animation above that also includes mid-lake buoy observations. Lake Superior is still quite chilly — surface temperatures over a large part of the lake hover near 40o F! These surface temperature are below normal (link, from this site) Warmest Great Lakes temperatures are (as is also typical) over western Lake Erie, where values are in the low 80s (oF).

Brief flareup of the Moose Fire in Idaho

July 21st, 2022 |

GOES-17 “Red” Visible (0.64 µm, top left), Shortwave Infrared (3.9 µm, top right), Fire Power (bottom left) and Fire Temperature (bottom right) images [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm), Shortwave Infrared (3.9 µm), Fire Power and Fire Temperature images (above) showed an unusual early-morning flareup of the Moose Fire in Idaho on 21 July 2022. The Fire Temperature and Fire Power derived products are components of the GOES Fire Detection and Characterization Algorithm FDCA.

During this brief flareup, the peak values of Shortwave Infrared, Fire Power and Fire Temperature were a rather modest 83.17ºC, 886.98 MW and 845.37 K respectively — however, the fire was hot enough to produce a notable smoke plume that then drifted southeastward. This flareup apparently occurred during a local increase in terrain-driven wind speeds, around the time that the nocturnal temperature inversion was eroding (which aided in the rapid vertical ventilation of fresh smoke).

GOES-17 True Color RGB images created using Geo2Grid (below) provided a clearer view of the smoke plume as it curled southeastward — along with the ventilation of smoke from nearby valleys that had settled into lower elevations beneath the nocturnal temperature inversion.

GOES-17 True Color RGB images [click to play animated GIF | MP4]