A storm system might bring rain and snow to Southern California by the middle of the week as temperatures transition from last week's record highs to more fall-like conditions.
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Rainfall totals of .10 to .50 inches are possible between Tuesday and Wednesday nights. Snow levels might drop to 7,000 feet.
"There is a threat of thunderstorms," said forecaster Elita Loresca. "That could mean some heavy rain, gusty winds and hail."
Temperatures will remain in the mid-70s in downtown Los Angeles and low-80s inland Monday before an eight- to 10-degree drop by mid-week. In mountain areas, temperatures will be in the high-60s Monday, but dip to the mid-40s by Thursday.
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The significant drop in temperature readings comes seven days after a record-high of 99 degrees in Lancaster as October opened with a blast of summer-like heat. Temperatures in the high-70s are forecast for Monday in Lancaster.
A cooling trend is in place across much of the country this week. More than 70 record-low temperatures were set in the upper Midwest during the weekend. Frost and freeze advisories were in effect Monday for several states.