Today, the French Fire in the Sierra Forest http://inciweb.nwcg.gov/incident/4013/ was estimated at 7,024 acres and the El Portal Fire in Yosemite http://inciweb.nwcg.gov/incident/4012/ was at 3,900 acres. Smoke has mostly been impacting the west side of the Sierra crest but during the right weather conditions makes it over to the east side, especially following the San Joaquin River drainage up over Mammoth Pass. As I’m writing this post, this is occurring already. A BlueSky smoke dispersion model predicts that, later tonight, the smoke from both fires will travel east and settle into valleys and basins, where it will linger until about midday tomorrow. Below is a 7:43 PM output of the model in a Google Earth image, with the fires and towns labeled for reference. Concentrations just exceeded the District’s Stage I health advisory level of 100 ug/m3 in Mammoth Lakes, but are not predicted to elsewhere in Owens Valley.
The BlueSky models are available at http://www.airfire.org/data/bluesky-daily/. Look for the California/Nevada daily runs in either Google Maps format (MAP) or Google Earth (KMZ).