10-minute JMA Himawari-9 AHI Shortwave Infrared (3.9 µm) and Clean Infrared Window (10.4 µm) images (above) showed he development of a pyrocumulonimbus (pyroCb) cloud northwest of Tamworth (YSTW) in New South Wales, Australia on 18 December 2023. The coldest cloud-top Infrared Window brightness temperature was -53.4ºC at 1230 UTC.The southern flank of... Read More
As discussed in this blog post, heavy rainfall had been occurring across the Samoan Islands on 14 December 2023. The South Pacific Convergence Zone (SPCZ) remained in the vicinity of the Samoan Islands on 16 December (surface analyses) — and 1-minute Mesoscale Domain Sector GOES-18 (GOES-West) Infrared images (above) showed another round of deep convection that produced heavy... Read More
Airmass RGB imagery every hour from 1000 UTC on 14 December through 1900 UTC on 15 December, below, overlain on top of GOES-18 Level 2 Total Preciptable Water, show strong convection in between Tutuila and the Manu’a islands of American Samoa mostly ending after 0000 UTC on 15 December, but... Read More
Sentinel-1A’s overpass over the Gulf of Tehuantepec shortly after 0000 UTC on 13 December, shown above in a toggle with topography, corresponded with the beginning of an event of strong winds (colloquially called a “Tehuantepecker”) cause by funneling of wind through the Chivela Pass in the Sierra Madre mountains. At... Read More
