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1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) images (above) include time-matched SPC Storm Reports plotted in cyan — and showed several tornadoes and hail up to 4.50 inches in diameter across Arkansas early in the evening on 11 April 2022. One of the larger tornadoes prompted the issuance of... Read More
GOES-16 “Clean” Infrared Window (10.35 µm) images, with time-matched SPC Storm Reports plotted in cyan [click to play animated GIF | MP4]
1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) images (above) include time-matched SPC Storm Reports plotted in cyan — and showed several tornadoes and hail up to 4.50 inches in diameter across Arkansas early in the evening on 11 April 2022. One of the larger tornadoes prompted the issuance of a Tornado Emergency:
Tornado Warning including Jacksonville AR, Cabot AR, Gibson AR until 8:45 PM CDT pic.twitter.com/qEYQqhMCsV
April 11 2022 saw the first measurable snowfall ever in April at the Portland OR airport (WFO Portland Tweet), where records have been kept since 1940. The GOES-16 animation above shows the weather system responsible for the weather.NOAA-20 overflew the west coast shortly after 1000 UTC (map of the orbit, from this website), and NUCAPS profiles... Read More
GOES-16 Band 13 infrared (10.3 µm) imagery, 0941-1346 UTC on 11 April 2022 (Click to enlarge)
April 11 2022 saw the first measurable snowfall ever in April at the Portland OR airport (WFO Portland Tweet), where records have been kept since 1940. The GOES-16 animation above shows the weather system responsible for the weather.
NOAA-20 overflew the west coast shortly after 1000 UTC (map of the orbit, from this website), and NUCAPS profiles derived from the CrIS and ATMS instruments on board helped define the cold airmass just offshore. The toggle below shows two soundings (green suggesting that the retrieval converged to a solution) just along the shoreline; 850-mb temperatures are -5oC and -4oC at the northern and southern profiles, respectively; the diagnosed freezing levels at both locations are higher than 2000′.
NUCAPS profiles from NOAA-20 at two locations off the west coast of the United States, 1019 UTC on 11 April 2022 (Click to enlarge)
The toggle below shows Sounding Availability points (zoomed in) and diagnosed freezing levels farther offshore, suggesting colder air out over the open ocean.
Sounding Availability points, and diagnosed freezing levels, ca. 1020 UTC on 11 April 2022 (click to enlarge)
Gridded NUCAPS are available in AWIPS — and also at this site created by NASA SPoRT (and at RealEarth). The toggle below shows gridded 850- and 700-mb temperatures from the NOAA-20 overpass. The coldest air is shown over the Pacific Ocean at 1017 UTC.
Gridded 850- and 700-mg temperatures, 1017 UTC on 11 April 2022 (Click to enlarge)
NUCAPS profiles and gridded NUCAPS fields can give timely observations over large data voids (such as the Pacific Ocean) in advance of high-impact weather events.
A fire at the Costa Sur power generation station in southwestern Puerto Rico shortly after 0100 UTC on 7 April caused wide-spread (but short-lived) power outages over the island. Imagery above shows the Day Night Band visible imagery (0.70 µm) from Suomi NPP, and a marked decrease in luminosity is... Read More
Suomi NPP Day Night Band visible (0.70 µm) imagery (left) and I05 infrared (11.45 µm) Brightness Temperature imagery (right) from 5-9 April 2022; NPP orbit paths/times are also indicated (click to enlarge)
A fire at the Costa Sur power generation station in southwestern Puerto Rico shortly after 0100 UTC on 7 April caused wide-spread (but short-lived) power outages over the island. Imagery above shows the Day Night Band visible imagery (0.70 µm) from Suomi NPP, and a marked decrease in luminosity is apparent in the 07 April imagery. I05 infrared (11.45 µm) imagery on the right (all imagery is from the NASA Worldview site) shows few clouds over the island. The animations below show Day Night Band imagery alone from 6-8 April, and I05 Brightness Temperatures from 6-8 April 2022.
Suomi NPP Day Night Band visible (0.70 µm) from 6-8 April 2022; NPP orbit path/times are also indicated (click to enlarge)Suomi NPP I05 (11.45 µm) infrared Brightness Temperature from 6-8 April 2022; NPP orbit path/times are also indicated (click to enlarge)
1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm) images (above) showed a hazy plume of resuspended volcanic ash — from the 1912 eruption of Novarupta-Katmai — moving southeastward then eastward across the Shelikof Strait toward Kodiak Island in southern Alaska on 08 April 2022.The corresponding 1-minute GOES-17 Dust RGB images (below) displayed faint hues of... Read More
GOES-17 “Red” Visible (0.64 µm) images [click to play animated GIF | MP4]
1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm) images (above) showed a hazy plume of resuspended volcanic ash — from the 1912 eruption of Novarupta-Katmai — moving southeastward then eastward across the Shelikof Strait toward Kodiak Island in southern Alaska on 08 April 2022.
The corresponding 1-minute GOES-17 Dust RGB images (below) displayed faint hues of magenta associated the plume — which appeared to increase somewhat around 00 UTC on 09 April.
GOES-17 Dust RGB images [click to play animated GIF | MP4]
1-minute GOES-17 True Color RGB images created using Geo2Grid(below) helped to confirm the emergence of a second pulse of resuspended ash that began around 00 UTC.
GOES-17 True Color RGB images [click to play animated GIF | MP4]
