Mauna Loa on the Big Island of Hawai’i became active overnight, ending a quiescent phase that started back in 1984 — the longest period of dormancy for this Volcano since the 1800s. The Ash Probability animation above, combining both GOES-17 PACUS and GOES-17 Full Disk imagery (using imagery from this site)... Read More
The animation of GOES-17 visible imagery (Band 2, 0.64 µm), above, (created at the CSPP Geosphere site) shows the characteristic signal of Sun Glint — the moving bright region. Sun glint (also discussed on this blog here, here, here, here and — for moonglint: here!) occurs when radiation from the Sun reflects... Read More
The Gálvez-Davison index (GDI) is a useful derived product (available online here from NCEP) for predicting tropical convection in tradewind regimes. In general, the larger the GDI, the more likely that showers and thunderstorms will be present. The toggle above compares GDI with K-Index derived from NUCAPS data (the Sounding Availability plot shows in... Read More
GOES-17 (GOES-West) “Red” Visible (0.64 µm), Shortwave Infrared (3.9 µm), “Clean” Infrared Window (10.35 µm) and Fire Temperature RGB images (above) showed a wildfire just southeast of Fort Simpson in Canada’s Northwest Territories (just north of the border with British Columbia), which produced a pair of pyrocumulonimbus (pyroCb) clouds late in the day on 10 October 2022. Surface winds gusting... Read More
