The Storm Prediction Center issued an Extreme Fire Weather Outlook (note that those conditions are #6 on the Priority List for Mesoscale Sectors!) for portions of southern California on 6 November 2024, and the forecast office in Los Angeles issued both High Wind Warnings — for strong Santa Ana winds — and a Red Flag Warning, as shown here, noting that this was a Particularly Dangerous... Read More

NUCAPS estimates of temperature and dewpoint give swaths of information over the Arctic — a region where conventional observations are uncommon and widely spaced. The toggle above shows a disorganized low pressure system over central Alaska — light snow is widespread as shown by the surface observations, below (and in... Read More

GOES-18 Airmass RGB imagery, above, from 1500-1820 UTC on 28 October, show light snow over much of central Alaska as a storm system moves into the state. Temperatures at 500 mb, below, derived from NUCAPS profiles (as shown in the toggle), show a tongue of warmer air positioned with the cloud feature (shown as white) in... Read More

Infrared imagery over the Hawai’ian Islands on 25/26 October, below, shows convective development over Maui and Oahu. This was also a region of strong vertical wind shear, as shown below, as upper level cloud features were moving southeastward, low level clouds were moving to the west).GREMLIN is a machine-learning tool... Read More