What products are available in the Arctic in between SAR observations? Consider the composite image above, showing RADARSAT-2 SAR ice concentration at 0453 UTC on 22 February 2023 over/around Saint Matthew Island (direct link to footprint here at the STAR SAR Wind site*) and an RADARSAT Constellation Mission-3 (RCM3) image at at 0546 UTC on 22... Read More

Portland OR had a snowfall of 5.3″ on 22 February 2023, a record for the date. (Update! The snow on 22 February ended up being 10.8″, the second snowiest day of record!) The GOES-18 Clean Window Infrared (10.3) imagery animation, above, taken from the CSPP Geosphere site (direct link to animation) shows the system responsible... Read More

GOES-16 (GOES-East) “Red” Visible (0.64 µm) and Day Cloud Phase Distinction RGB images (above) showed widespread elevated convective banding that was helping to enhance snowfall rates — with some locations reporting 1.5 to 2.0 inches per hour — across parts of Minnesota, Wisconsin, Lower Michigan, Iowa and Illinois on 16 February 2023. There was no GLM indication... Read More

1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Red” Visible (0.64 µm) images (above) include plots of Derived Motion Winds (DMW) — and showed the rapid offshore transport of cold arctic air across the southern Cook Inlet, Shelikof Strait and northwestern Gulf of Alaska on 12 February 2023. The fastest low-level (Surface – 900 hPa) DMW speed was... Read More