Los Angeles, California – Southern California is facing another soaking storm on New Year’s Day, with rain intensifying Thursday morning and continuing through the afternoon, raising renewed concerns about flash flooding across an already saturated region. The wet weather is also set to drench the iconic Rose Parade in Pasadena, a rare occurrence for the New Year’s Day tradition.
Forecasters say widespread rainfall will impact coastal, valley, mountain, and desert areas, with some locations seeing heavy downpours during peak hours. Officials are urging residents to stay alert, especially in flood-prone and burn-scar areas.
Rainfall totals and flood concerns
According to the National Weather Service, Southern California can expect 1 to 2 inches of rain across coastal and valley areas by the end of Thursday. Higher totals are forecast in the foothills and mountains, where 2 to 5 inches of rain could fall before the storm tapers off.
Rainfall rates are expected to average 0.25 to 0.5 inches per hour, but meteorologists warn that localized bursts could reach up to 1 inch per hour, significantly increasing the risk of flash flooding. Urban areas, freeways, and low-lying roads are particularly vulnerable due to saturated ground from previous storms.
Officials say residents should be prepared for ponding on roads, reduced visibility, and possible debris flows near hillsides and recent wildfire burn areas.
Thunderstorm and snow outlook
The weather system also carries a 15% to 30% chance of thunderstorms, which could bring brief periods of heavier rain, gusty winds, and isolated lightning. While thunderstorms are not expected to be widespread, any storm cell that develops could intensify rainfall over short periods.
Snow levels are expected to remain relatively high, hovering between 8,000 and 8,500 feet, meaning most mountain communities will see rain rather than snow. Higher elevations could still experience winter weather conditions, including slick roads and limited visibility.
Rose Parade almost guaranteed to get wet
One of the most notable impacts of Thursday’s storm will be on the Rose Parade in Pasadena, which begins at 8 a.m. Forecasters say there is a near 100% chance of rain during the event.
Rain has fallen on the Rose Parade fewer than a dozen times in its 136-year history, with the last rainy parade occurring in 2006. Despite the forecast, organizers have confirmed that the parade will go on as scheduled, though spectators are advised to bring rain gear and plan for cooler, wet conditions.
When will the storm move out?
The heaviest rain is expected to taper off Thursday night, giving Southern California a brief break from wet weather through much of Friday. However, forecasters caution that the lull will be short-lived.
Another storm system is expected to arrive late Friday night into Saturday, bringing additional rainfall to the region. Saturday’s system could deliver 0.25 to 1 inch of rain across most areas, with up to 2 inches possible on south-facing mountain slopes.
While this second storm is not currently expected to be as intense as Thursday’s, it could still worsen flooding concerns due to already saturated soil.
Temperatures across the region
Along with the rain, cooler temperatures are expected throughout Southern California:
- Los Angeles and Orange County:
High 65°F, low 55°F - Valleys and Inland Empire:
High 64°F, low 51°F - Beaches:
High 62°F, low 57°F
Waterspouts are possible offshore, especially during heavier showers. - Mountains:
High 46°F, low 29°F - Desert areas:
High 54°F, low 41°F
Palm Springs will be warmer, with highs climbing to 65°F.
Safety reminders for residents
Emergency officials advise residents to avoid driving through flooded roads, monitor local weather alerts, and allow extra travel time during periods of heavy rain. Even shallow water on roadways can be dangerous, and rapidly changing conditions are possible during downpours.
Those planning to attend outdoor New Year’s Day events should dress warmly, use waterproof gear, and stay informed about any last-minute advisories.
What happens next
Southern California’s unsettled weather pattern looks set to continue into the weekend, with additional rain possible beyond Saturday. Forecasters say conditions will be monitored closely, especially in areas at higher risk of flooding and debris flows.
For now, residents are encouraged to stay weather-aware as the New Year begins with another round of winter storms.
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