The Autumnal Equinox is this Sunday, September 22 at 1:44 pm pdt (2044 UTC). See http://ggweather.com/seasons.htm.
Typhoon Usagi in the western Pacific is currently entering the Luzon Strait between Taiwan and the Philippines and on a direct track toward Hong Kong. See:
http://www.nrlmry.navy.mil/tc_pages/tc_home.html
Bob Henson of UCAR has put together an excellent analysis of recent flooding in Colorado titled "Inside the Deluge". See http://www2.ucar.edu/atmosnews/opinion/10250/inside-colorado-deluge?utm_source=AtmosNews&utm_campaign=b3c15d48ce-Atmosnews_2013_09_209_20_2013&utm_medium=email&utm_term=0_80502e816e-b3c15d48ce-53337165