On 14 November 2022, American Samoa (indeed, all the Samoan Islands) were withing deep moisture associated with the South Pacific Convergence Zone, a common occurrence. The animation of MIMIC Total Precipitable Water, above, shows the evolution of the moisture hourly from 0000 to 1200 UTC on 14 November. (MIMIC fields... Read More
An anomalously-deep Hurricane Force low (surface analyses) moved eastward across the southern Bering Sea and eastern Aleutian Islands on 28 October 2022. GOES-18 (GOES-West) Air Mass RGB images (above) included plots of hourly surface reports — which showed some of the strong winds produced by this storm. Peak wind gusts included 75 knots / 86 mph... Read More
GOES-18 (GOES-West) Upper-level Water Vapor (6.2 µm) images (above) displayed a quasi-stationary train of gravity waves north and northwest of Hawai`i on 20 October 2022. There were no pilot reports of turbulence in the vicinity of these waves — likely due to the lack of rapid wave propagation, and the non-interfering... Read More
An extended period of hot temperatures across much of the western US — where drought conditions were widespread — helped set the stage for large wildfires which produced several pyrocumulonimbus (pyroCb) clouds in parts of Oregon, Idaho and California during the 07-10 September 2022 period.===== 07 September =====GOES-18 (GOES-West) Day Land Cloud Fire RGB images... Read More
