VIIRS data from NOAA-20 at the CIMSS Direct Broadcast download site, above, at 1734 UTC on 2 September were used to create True Color imagery, and SST fields over the largely-clear Great Lakes. Light winds associated with persistent high pressure over the Great Lakes (below) meant suppressed vertical mixing, leading to warm water temperatures on the... Read More

VIIRS Day Night Band imagery from the Direct Broadcast site in Honolulu, above, shows Hurricane Hone as it passes south of South Point on the Big Island of Hawai’i on 25 August 2024. NOAA-21, Suomoi-NPP and NOAA-20 viewed the storm at 1130, 1154 and 1218 UTC, respectively. Data were processed at the antenna with... Read More

VIIRS imagery from Suomi NPP and NOAA-20, above, show the structure of Hurricane Ernesto as it pulls away from Puerto Rico. Dry air is entrained within the storm, as evidenced by the regions near the center where convection is absent. Sea-surface temperatures in the region are quite warm, however, and... Read More

The Park Fire developed to the northeast of Chico California on 24 July. Day Night Band visible (0.7 µm) imagery, below (from here), shows the fire over the course of the next four days. It grew very quickly on the 25th and 26th. It appears that by the overnight hours... Read More