NWS Forecast Office Los Angeles, CA

Changing weather is on the way, with increasing heat, thunderstorms, and fire weather impacts this Tuesday through the following weekend (9/16-21). Heat will peak on Tuesday and Wednesday with a high risk for plume dominated fire behavior. Starting Tuesday, there is a small chance for dry thunderstorms, with an increasing chance on Wednesday where a mix of dry and wet thunderstorms will be possible. Starting Thursday and lasting through Sunday, more moisture moves in and chances for wetter thunderstorms will further increase (10-30% chance). Dry lightning induced fire starts and gusty and erratic winds will be possible with any thunderstorm Tuesday through Sunday, while the threat of brief heavy downpours and flooding increase as early as Wednesday and last through Sunday.