Increased monsoonal moisture, including humidity, showers and thunderstorms, are expected to arrive late Monday through Friday.
The moisture is expected mainly in the mountains and portions of the High Desert, the National Weather Service reported.
Monsoonal weather should arrive each afternoon and early evening this week, with mountain areas having the highest chance of heavy rainfall and possible flash flooding.
Thunderstorm coverage is expected to be greater on Tuesday, with the Big Bear area possibly receiving measurable rainfall.
On Wednesday, thunderstorm activity may decrease before increasing on Thursday and Friday. The chance of moisture decreases on Saturday.
On Monday, rain fell in the Barstow area as thunderstorms continued to develop in eastern San Bernardino County, Nevada, and Arizona.
Through Friday, high temperatures in the Victor Valley are expected to reach the mid-to-high 90s, with the Big Bear area hitting the mid-70s mark.
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This article originally appeared on Victorville Daily Press: Increased monsoonal moisture expected in the High Desert