Monsoonal storms from the south will bring thunder, rain, and possibly lightning through Wednesday evening, forecasters predicted Tuesday, just when Southern Californians may have become accustomed to sunny days and high temperatures.
Rain and storm chances increase as summer approaches
With the approaching storm, less than half an inch of rain was predicted for Orange County and much less for Los Angeles County, where precipitation is forecast to vary but stay below.25 inches beginning Tuesday night.
The majority of the activity will be in the highlands and deserts, with minor activity of brief downpours and gusty winds forecast in the eastern San Gabriel Mountains.
It might rain more heavily in the San Bernardino Mountains.
Rainfall is anticipated in the San Jacinto Mountains as well, but not to the same extent as in the mountains of San Diego County that stretch to the Santa Rosas, which are predicted to experience the worst downpours.
Rain and thunderstorms may also be present in the Santa Ana Mountains.
According to Mark Moede, a meteorologist with the National Weather Service, “Anywhere above 7,000 feet will experience measurable rainfall.”
Thunderstorms are also anticipated in San Bernardino County’s eastern valleys, and some lightning was predicted.
Although less frequent, there is still a potential of lightning in Orange County.
The pattern of Wednesday’s temperatures is expected to hold, with hotter conditions inland and milder conditions on the coasts, but the monsoonal precipitation is expected to increase regional warmth by 3 to 5 degrees.
Temperatures in Orange County’s interior might reach the mid- to upper-80s range.
Other high temperatures on Wednesday are expected to be over 95 in Riverside, around 81 in Torrance, and around 91 in Pasadena.
Before Wednesday’s storms, there may be dry lightning in Los Angeles County Tuesday night.
There will be a possibility of a fire because of the dry lightning, but if there is more moisture on Wednesday, the risk may be reduced.
The National Weather Service advises staying inside or, if outside, finding cover under a tree line as thunder starts.
The recent Sheep fire scars in Wrightwood are at risk for debris flows and mudslides during periods of heavy rainfall, according to the Angeles National Forest.
Cloud-to-water lightning late Tuesday into Wednesday along the shore is a potential problem.
There may be brief downpours through Thursday, followed by drier weather on Friday and Saturday. Early in the following week, another monsoonal moisture system may pass over the region.