GOES-18 Night Microphysics imagery from 19 July 2023, above, shows a disorganized Tropical Storm Calvin moving south of Hawai’i before sunrise on 19 July. The low-level swirl of the system is apparent to the south of the Big Island; convection associated with the system develops during the animation over Hawai’i,... Read More

Suomi NPP overflew Tropical Storm Calvin to the east of Hawai’i at around 1136 UTC on 18 July. Data downloaded from the NODD, and processed by Polar2Grid (version 3.0), show the storm in very low light conditions, above. Calvin is moving rapidly westward towards Hawai’i, and interests in that state... Read More

Pacific Hurricane Calvin was sampled by Radar Constellation Mission #3 (RCM-3) shortly after 0200 UTC on 14 July 2023. The SAR winds (click here to access a JAOTech article on this subject!) show strong winds surrounding a not-quite-circular closed eye, with a region of strong winds extending in a curved... Read More

The third named storm of the Eastern Pacific tropical season has formed. (Click here for NHC‘s public advisory on the naming of Calvin) The mp4 animation above (click here for an animated gif) shows the evolution of the system for the 24 hours ending at 1210 UTC on 12 July... Read More