Excessive Heat — Santa Ana Mountains and Foothills, California

2022-09-01 to 2022-09-09 · Santa Ana Mountains and Foothills, California

Event narrative

The El Cariso RAWS site observed daily highs ranging from the middle 90s to upwards of 107 degrees through much of early September. The highest daily maximum temperature of 107 degrees occurred on the afternoon of Tuesday, September 6th, with a high of 106 degrees occurring on the 1st and 5th of September. Highs on Friday, September 9th were significantly cooler due to clouds and rain associated with the approach of Hurricane Kay, which ended the heat wave.

Wider weather episode

Early September heat starting in August.

Source: NOAA Storm Events Database, event_id 1051010. Narrative written by the NWS forecast office that issued the report.