what you should Know
- Rain and frost are forecast for Tuesday night.
- Heavy rain would start from Wednesday night and continue till Thursday night.
- Highs are expected in the 50s and 60s across much of Southern California.
The 2023 Rose Parade in Pasadena just got off under clear skies before a rain system moved over Southern California.
Although it was a bit chilly during the traditional event in Pasadena, weather authority Marcos Mora said more rain and frost were forecast as part of a stronger Pacific storm. This system could affect Southern California Wednesday through Thursday.
Scattered rain and snow are possible late afternoon, but the chance increases Tuesday afternoon through Tuesday night as a cold advance advances.
The wind will also increase late into the night over desert and mountainous areas with gusts possibly between 40 and 50 mph.
Severe thunderstorms will last from Wednesday through Thursday.
Wednesday: Before the weather system was formed, there were scattered showers throughout the day.
night to thursday morning: This is when we will see widespread heavy rainfall across the region.
We were able to see impressive rain totals with this system as we did last weekend. Snowfall levels appear to remain high.
Los Angeles County was under a cold weather watch, as the low temperature was expected to drop below 32 degrees.
Lancaster in the Antelope Valley has been under a cold weather advisory for Tuesday, Friday and Saturday. Mount Wilson was also under a cold weather watch for Thursday.
Weather conditions have already called for a high wave advisory in Orange County and San Diego County as of 6 p.m. Monday. Wind advisories are also in effect from 4 to 6 p.m. Monday in the mountains, valleys and desert areas of San Diego, San Bernardino and Riverside counties.
Health officials are warning people to avoid entering ocean water near storm drains or rivers because of possible bacterial contamination.
The Los Angeles County Department of Public Health has issued a Marine Water Quality Report in effect at least until 7 a.m. Tuesday.
Health officials note that storm water runoff that reaches the ocean can contain bacteria, chemicals, debris, trash, and other health hazards.
Health officials said people coming in contact with the affected water in the ocean could become ill.
Cooler temperatures are forecast throughout the week with highs in the 50s and 60s for most areas.