10-minute Full Disk scan GOES-18 (GOES-West) daytime True Color RGB and Nighttime Microphysics RGB images — created using Geo2Grid (above) — showed the offshore transport of glacial silt from the Copper River Delta in Southcentral Alaska from 11-23 December 2025. Even though cloud cover occasionally obscured the signature of this plume of airborne... Read More
A 29-day sequence of 10-minute Full Disk scan GOES-18 (GOES-West) daytime True Color RGB and Nighttime Microphysics RGB images — created using Geo2Grid (above) showed the evolution of a long-duration Tule fog event across the Central Valley of California, from 21 November to 19 December 2025.The fog was more sparse in its areal coverage during the initial... Read More
As strong middle-tropospheric west-northwesterly winds continued across Colorado on 19 December 2025, a mountain wave became established over the Front Range. Wind shear associated with this mountain wave resulted in numerous Pilot Reports (PIREPs) of Moderate to Severe turbulence (above).One notable PIREP mentioned 5 seconds of Severe Turbulence at an altitude of... Read More
1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Water Vapor images (above) displayed an intermittent signature of subsidence-induced warming/drying (brighter shades of yellow to orange) that led to the development of strong downslope winds in the Front Range of Colorado on 17 December 2025. Several sites recorded peak wind gusts in excess of 100 mph.A toggle... Read More
