Hot and dry Santa Ana conditions across southern California (with wind gusts as high as 91 mph in Los Angeles county and 87 mph in Ventura county) caused widespread blowing dust/sand (reducing surface visibility to 3 miles at Ontario, station identifier KONT) and created an environment that allowed several large... Read More
AWIPS composite images of the 6.7µm GOES-11 and 6.5µm GOES-12 “water vapor” channels (above) show the eastward progression of synoptic-scale frontal systems across the US and Canada — as well as the westward motion of what could evolve into a subtropical disturbance in the eastern Gulf of Mexico — on... Read More
A weak tornado occurred Thursday 27 September in Racine County of southeast Wisconsin. (North Cape Wisconsin, the site of the brief EF-0 touchdown, is in north-central Racine County). The tornado occurred about 15 minutes before the radar image below; the cell that produced the tornado is moving offshore into Lake Michigan at the time of the... Read More
GOES-11 visible channel imagery (above) showed a nice example of lee wave “lenticular clouds” immediately downwind of the Spring Mountains (whose highest peak is Mt. Charleston at 11,918 ft or 3362 m) just to the northwest of Las Vegas, Nevada (Google maps) on 14 September 2007. The vertical motions associated with lee waves can cause... Read More
