Hurricane Helene spent time percolating in the northwestern Caribbean over the past week. The animation above show true-color imagery from the CSPP Geosphere site at 1-day intervals from 13 to 24 September. Convection over the southern Gulf of Mexico on 18-20 September moved northward and expanded greatly before being designated... Read More

The Fall Equinox in 2024 happened on September 22. According to the astronomical definition of the seasons, the autumnal (or fall) equinox marks the end of summer and the beginning of autumn, which lasts until the winter solstice (around December 21 or 22 in the Northern Hemisphere). This is the... Read More

Francine became the 4th Hurricane of the Atlantic Tropical Cyclone season at 0000 UTC on 11 September (NHC advisory) 2024. The animation of True-Color imagery, above, from the CSPP Geosphere site, shows sporadic vigorous convection near the storm center in the hours before the hurricane designation. The Gulf of Mexico can be monitored... Read More

Nighttime Microphysics RGB Imagery (Quick Guide) from the CSPP Geosphere site, above (direct link to image), from early on 1 September, shows a distinct color change from the southern US to the northern US, stretching east-northeast from Oklahoma to Pennsylvania. This abrupt change from deep purple to light purple heralds a change in... Read More