1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above), with and without an overlay of GLM Flash Extent Density, showed convection moving onshore in Southern California during the late morning hours on 24 February 2023 — which prompted NWS Los Angeles to issue a Tornado Warning at 1807... Read More
A second pair of SAR observations occurred on 23 February, one at 0544 UTC (above) and one at 1647 UTC (below). The character of the two scenes is quite different. The 0544 UTC wind imagery and NRCS imagery (from this site) shows a mostly quiescent scene with widespread northeasterly winds. One arc of winds... 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) images (above) showed strong southwesterly winds ahead of an approaching cold front, causing areas of blowing dust across parts of New Mexico, Texas and Oklahoma on 22 February 2023. Strongest wind gusts were in the 60-70 mph range, and blowing dust was reducing the surface visibility to... Read More
