August 30, 2017 - Smoke: A strong high pressure system remains over the area which will continue to bring in hotter and drier conditions. Eye level winds in the afternoon are forecast to be 4-8 mph with gusts up to 15 mph and diurnally driven. Transport winds are expected to be South at 6-10 mph. The Railroad Fire on the Sierra NF will aid in potential degraded air quality conditions in the area, especially in Oakhurst and Mariposa with potential elevated levels of smoke in the morning then clearing in the afternoon. Still expect potential morning smoke in the Central Valley. The Eastern side of the crest may see smoke impacts in the evening and overnight. Intensity of smoke will depend on the activity of the fires.

Fire: South Fork: https://inciweb.nwcg.gov/incident/5502/

Empire: https://inciweb.nwcg.gov/incident/5475/

Railroad: https://inciweb.nwcg.gov/incident/5553/

Other: Dense smoke for short periods can aggravate symptoms for sensitive persons without changing 24-hr AQI levels. Note: AQ forecasts below reflect only particulate matter - not ozone.


Source: USDA