Back-to-Back Atmospheric River Storms Batter California, Bringing Both Relief and Chaos
A series of back-to-back atmospheric river storms began to pummel Los Angeles county Tuesday night, delivering much-needed moisture to the drought-stricken region while raising concerns about potential mudslides and flooding.The storms, which arrived ahead of another potential round of Santa Ana winds, have already left a trail of destruction across Northern California, with landslides, urban flooding, and stream overflows reported.
Forecasters initially expressed optimism that the rain would primarily benefit Southern California, reinvigorating vegetation left vulnerable by a historically dry start to the water year. However,the storms have proven to be more severe than anticipated,especially in the North Bay,where landslides and flooding have caused significant disruptions.
In L.A.and Ventura counties, the National Weather Service estimated a 5% to 10% chance of significant debris flow in fire-scarred areas. officials are closely monitoring the situation, as the second storm could strengthen or shift its path later this week. “Out of an abundance of caution, the highway must be closed due to soft soils on both the hill and ocean sides of the road. Mud and debris flows may occur and canyons may overtop, blocking the road or causing further damage,” Caltrans wrote in a news release.The Pacific Coast Highway, which had just reopened Monday morning after a weeks-long closure during the palisades fire, was shut down again Tuesday afternoon. the closure spans from Chautauqua Boulevard in Los Angeles to Carbon Beach Terrace in Malibu,with Topanga Canyon Boulevard also affected.
in Northern California, the first atmospheric river arrived Friday, followed by a second late Monday. By Tuesday morning, reports of landslides and flooding were widespread. In San Francisco,a massive pothole measuring about 5 feet by 4 feet opened up in the Marina District,causing chaos as multiple autonomous Waymo cars drove through it at full speed.
The storms also brought down several trees, including one that fell on a person and another that took down power lines. In Santa Rosa, a massive tree fell at Steele Lane Elementary School, damaging a building and forcing a nearby road to close.Meanwhile, in forestville, a rain-saturated hillside gave way near the Hacienda Bridge, sending a home sliding into the Russian River.
A flood watch remains in effect for much of Northern California, with several roads closed due to flooding. In Marin County, California 1 between Point Reyes Station and Bear Valley Road was shut down, while most lanes of the 101 freeway in Windsor were temporarily closed.
As the storms continue to batter the state, officials are urging residents to stay vigilant and prepare for potential hazards.
| Key Impacts of Atmospheric River Storms |
|———————————————|
| Southern California |
| – Pacific Coast highway closed |
| – 5% to 10% chance of debris flow |
| Northern California |
| - Landslides and urban flooding |
| – Russian River overflow |
| – 101 Freeway lanes closed |
The storms serve as a stark reminder of the dual nature of atmospheric rivers—bringing both much-needed relief and significant challenges to a state still recovering from wildfires and drought. Stay tuned for updates as the situation evolves.
Southern California’s Fire Season Persists Despite Recent Rainfall
Southern California’s high fire season remains a significant concern, even as the region braces for additional rainfall this week.Meteorologists warn that the expected precipitation will not be enough to fully mitigate the risk of wildfires,particularly given the persistent dryness of vegetation across the state.
Why Rainfall Isn’t Enough
Kristan Lund, a meteorologist with the National Weather Service in Oxnard, emphasized that while the recent rains have provided temporary relief, they are insufficient to end the fire season. “While the rains will have provided temporary relief with high moisture in some fuel types, the expected rain this week will not be enough to wholly end high fire season,” Lund said.
The primary issue lies in the extreme dryness of vegetation, which typically takes three to six weeks to absorb sufficient moisture from rainfall. Chaparral and coastal sage, common in Southern California, are particularly slow to recover.
However, last month’s storm has made a noticeable difference. Alex Tardy, a meteorologist with the National Weather Service’s San Diego office, noted that vegetation has absorbed significant moisture. “Provided that it stays cool, and we don’t have additional Santa Ana winds and get a little bit of precipitation like we’re going to see this week — that buys us time in February,” Tardy said. “A little bit of rain and snow goes a long way in the middle of the winter.”
Rainfall Totals and Fire Risk
Downtown Los Angeles received 0.54 inches of rain from January 25 to January 27,with the possibility of an additional four-fifths of an inch by Friday. While this is a welcome change, it falls short of the 2 to 4 inches meteorologists say are necessary to definitively end the fire season.
The situation could worsen if dry Santa Ana winds return. Lund warned, “If we got a really dry Santa Ana next week, instead of a rainstorm, we could still have potential for extreme fire behavior. Any time we have that combination of dry air and strong winds — and it could just be no more rain for like a week or two — could even put us back into that risk for high fire [weather danger].”
Another Santa Ana Wind Event on the Horizon
Forecasters predict another Santa Ana wind event this weekend, with winds picking up from Friday through Monday. The strongest gusts are expected on Saturday. These winds, which flow from the high desert over mountains and through canyons, dry out vegetation rapidly, increasing fire risk.
Key Takeaways
| Factor | Details |
|—————————|—————————————————————————–|
| Rainfall This Week | 0.54 inches (Jan. 25-27) + 0.8 inches possible by Friday |
| required Rainfall | 2 to 4 inches to end fire season |
| Vegetation Recovery | 3 to 6 weeks for chaparral and coastal sage to absorb moisture |
| Santa Ana Winds | Expected Friday through monday,strongest gusts on Saturday |
The Bigger Picture
The ongoing fire risk comes after a devastating start to 2025 for Los Angeles County. The Eaton fire burned over 14,000 acres in Altadena, while the Palisades fire scorched 23,400 acres on the Westside. combined, these fires destroyed more than 16,000 structures, including many homes.
A recent report from UCLA’s Anderson Forecast estimates that the total property and capital losses from these wildfires could range from $95 billion to $164 billion. the report underscores the urgent need for investment in wildfire mitigation strategies to reduce future risks.
What’s Next?
While this week’s storms may provide temporary relief, Southern California remains vulnerable to wildfires. Residents are urged to stay informed and prepared,particularly with the potential return of Santa Ana winds. For the latest updates, visit the National Weather Service’s website.
As the region navigates this challenging fire season, the importance of proactive measures and community awareness cannot be overstated. Stay safe, stay informed, and remain vigilant.
Southern California Faces Prolonged Dry Spell as Jet Stream Shifts Away
Southern California’s hopes for significant rainfall this season are dwindling as the jet stream—a fast-moving current of air that carries moisture from west to east—shifts away from the region. According to meteorologist alex tardy, the latest forecast models indicate that the jet stream will instead move over Washington and Oregon, then dip southeast over Nevada and Arizona, leaving Southern California high and dry.
“To get more rain,Southern California would like to be under the jet stream and have a chance to grab the moisture it ferries,” Tardy explained.
Rainfall Deficit Reaches Alarming Levels
Despite recent rain, Southern California remains far behind its typical annual rainfall. Many communities have received less than 25% of their usual precipitation, with some areas getting less than 10%.
- Downtown Los Angeles has recorded just 0.7 inches of rain since the water year began on October 1—only 9% of its average for this time of year.
- San Diego has seen a record low of 0.35 inches, just 7% of its typical rainfall. This marks the driest start to the water year as recordkeeping began in 1850.
“That’s half of our annual rainfall that is missing,” Tardy said, noting that San Diego’s deficit is about 5 inches, while Los Angeles is nearly 7 inches short.
Santa ana Winds Add to the Challenge
The region is also grappling with santa Ana winds, which compress and warm as they move toward the coast, increasing fire risk—especially when combined with dry vegetation.While forecasters don’t anticipate significant fire risk this weekend due to recent rain,the Santa Ana wind season can last through March,keeping the threat alive.
What’s Next for February?
February is traditionally California’s wettest month, but the outlook remains uncertain. Tardy warns that cold air will dominate the northern United States,pushing the jet stream away from Southern California.
“we keep cold air,” Tardy said. “So, cold air really just becomes dominant across the northern United States, from the Pacific Northwest all the way to new England.”
Key Rainfall Data
| Location | Rainfall This Season | % of Average | Deficit |
|——————–|———————-|————–|———|
| Downtown Los Angeles | 0.7 inches | 9% | 7 inches |
| San Diego | 0.35 inches | 7% | 5 inches |
looking Ahead
With the jet stream bypassing Southern California, the region faces the possibility of extended dry weeks. Residents are urged to conserve water and stay vigilant about fire risks as the season progresses.
For more updates on California’s weather patterns,visit the National Weather Service or check out the latest forecasts from accuweather.
Southern California’s dry spell underscores the importance of sustainable water management and preparedness in the face of unpredictable weather patterns. Stay informed and take action to mitigate the impacts of this ongoing drought.
Dry Spell Looms for Southern California as Storm Systems Shift
Southern California is bracing for a dry spell as the jet stream moves away from the region, potentially leaving little room for significant precipitation in the coming weeks. According to meteorologist David Tardy, the shift in the jet stream means the area will likely experience cooler-than-average temperatures but minimal rainfall. “It’s not looking promising for precipitation down hear,” Tardy said.
While a potential storm system is developing in the Pacific Ocean, its impact remains uncertain. Tardy noted that even if it arrives by mid-February, ther’s “not much prospect for precipitation of any importance coming up.”
This Week’s Forecast: Light-to-Moderate Rain Expected
This week,Southern California is set to experience two atmospheric river storms,both of the “Pineapple Express” variety. These storms,known for carrying tropical moisture from the ocean near Hawaii to the mainland,are expected to bring light-to-moderate rainfall.
The first storm peaked in Los Angeles and Ventura counties Tuesday night and continued through midday Wednesday. The second storm is forecast to begin Thursday night and last into Friday morning.
“We’re most likely just seeing light-to-moderate rain amounts and rain rates with minor impacts,” said Todd Hall, a meteorologist with the National Weather Service’s Oxnard office.
Rainfall Rates and Potential Impacts
During the first storm, peak rainfall rates ranged from one-tenth of an inch per hour to one-quarter of an inch per hour. In Ventura, Santa Barbara, and San Luis Obispo counties, rates were slightly higher, reaching up to half an inch per hour in some areas. Isolated locations could see up to three-quarters of an inch per hour.
Meteorologists emphasize that rainfall rates of half an inch per hour or greater are the key threshold for triggering significant debris flow. While the current storms are unlikely to reach this level, there is a 10% to 20% chance that rates could hit two-thirds of an inch per hour over the burn area of the 2024 Lake fire.
| Key Forecast Details |
|————————–|
| Storm Type | pineapple Express (atmospheric river) |
| peak Rainfall Rates | 0.1–0.75 inches per hour |
| Debris Flow Threshold | 0.5 inches per hour or greater |
| Chance of higher Rates | 10%–20% over burn areas |
looking Ahead: A Dry February?
As the jet stream shifts, Southern California may experience offshore Santa Ana winds, further reducing the likelihood of precipitation. Tardy explained that this pattern “certainly doesn’t give us much of a chance for getting precipitation, but it does keep the temperatures cool and cooler than average for the second week of February.”
while the potential storm system in the Pacific Ocean offers a glimmer of hope, its impact remains uncertain. For now, residents should prepare for a dry spell and cooler temperatures in the weeks ahead.
Stay updated with the latest weather forecasts and safety tips by visiting the National Weather Service and the Los Angeles Times weather section.Southern California Braces for First Major Storm of the Season
Southern California is preparing for its first significant storm of the season, with forecasts predicting heavy rainfall and potential flooding across the region. The storm, expected to peak between 10 p.m. Tuesday and midday Wednesday, brings a mix of relief and concern, particularly for areas still recovering from recent wildfires.
Rainfall Forecast and Potential impacts
According to meteorologists, the storm is expected to deliver varying rainfall rates across the region. In San Luis Obispo County, there is a moderate chance (30% to 40%) of rainfall rates reaching between three-fifths of an inch to three-quarters of an inch per hour.”rainfall has the potential to be particularly focused on south-facing mountain slopes and hillsides, because of the path of the moisture arriving in the region,” said Hall, a local weather expert.
In Los Angeles County, the storm is likely to bring minor creek and roadway flooding. Specific rainfall predictions include:
- Long Beach and Covina: Approximately a quarter of an inch of rain.
- Santa Clarita: About a third of an inch.
- Downtown Los Angeles, Redondo Beach, and canoga Park: Around two-fifths of an inch.
Wildfire-Affected Areas at Risk
The storm’s arrival is particularly concerning for areas recently scarred by wildfires, such as the Santa Barbara County mountains north of Los Olivos, where the Zaca Fire scorched 38,664 acres. Burned landscapes are more susceptible to mudslides and debris flows during heavy rainfall, posing additional risks to residents and infrastructure.
Key Areas to Watch
| Location | Expected Rainfall | Potential Impacts |
|———————–|———————–|——————————–|
| San Luis Obispo County | 0.6–0.75 inches/hour | Focused on south-facing slopes |
| Long Beach,covina | 0.25 inches | Minor flooding |
| Santa Clarita | 0.33 inches | Minor flooding |
| Downtown L.A. | 0.4 inches | minor flooding |
Preparing for the Storm
Residents are urged to stay informed and take precautions, especially in wildfire-affected areas.Local authorities recommend clearing drainage systems, securing outdoor items, and avoiding unnecessary travel during peak rainfall periods.
Multimedia Insights
The storm’s progression can be tracked through detailed weather maps and satellite imagery,such as the one provided by the California Times.
As Southern California braces for this weather event, the storm serves as a reminder of the region’s vulnerability to extreme weather patterns. Stay updated with the latest forecasts and safety tips to navigate the storm safely.
For real-time updates, visit the National Weather Service or follow local news outlets like the Los Angeles Times.Southern California Braces for Dual Storms with Significant Rainfall Expected
Southern California is preparing for a one-two punch of storms this week, with the National Weather Service forecasting considerable rainfall across the region. The first storm is expected to bring moderate precipitation,while the second,more intense system could peak late Thursday night into early Friday.
Rainfall Totals Vary Across the Region
Rainfall totals are predicted to be higher in northern and western areas. In Ventura County, Thousand Oaks is expected to receive half an inch of rain, while Fillmore could see three-quarters of an inch. Oxnard may get four-fifths of an inch, and Ojai is forecasted to receive 1.64 inches.
Further north, Santa Barbara could see 1.19 inches,San Luis obispo 1.47 inches, and Cambria 1.96 inches. These totals highlight the regional variability in precipitation, with coastal and mountainous areas likely to bear the brunt of the storms.
Second Storm to Bring Peak Rainfall
The second storm is anticipated to be more impactful, with peak rainfall expected Thursday night and early Friday. Residents are advised to stay updated on weather alerts and prepare for potential flooding, especially in low-lying areas.
Key Rainfall Forecasts
| Location | Expected Rainfall |
|———————|———————–|
| Thousand Oaks | 0.5 inches |
| Fillmore | 0.75 inches |
| Oxnard | 0.8 inches |
| Ojai | 1.64 inches |
| Santa Barbara | 1.19 inches |
| San Luis Obispo | 1.47 inches |
| Cambria | 1.96 inches |
Stay Informed and Prepared
As these storms approach, it’s crucial for residents to monitor updates from the National Weather Service and local authorities. Ensure that drainage systems are clear, and have emergency kits ready in case of power outages or flooding.
For real-time updates,visit the National Weather Service website or follow local news outlets. Stay safe and prepared as Southern California weathers these back-to-back storms.Southern California Braces for Rainfall as Atmospheric River Approaches
Southern California is preparing for a bout of rainfall as an atmospheric river makes its way across the region. Cities like long Beach, Redondo Beach, santa Clarita, and Thousand Oaks are expected to receive about a third of an inch of rain. Meanwhile, downtown Los Angeles, Oxnard, and Canoga Park could see two-fifths of an inch, while Covina may get half an inch. Santa Barbara is forecasted to receive the highest amount, with three-fifths of an inch of rain.
the atmospheric river, a narrow corridor of concentrated moisture in the atmosphere, is set to bring much-needed precipitation to the area. While the rainfall amounts may seem modest, they could have significant impacts on local water resources and vegetation, especially in a region that has been grappling with drought conditions in recent years.
rainfall Distribution Across Key Cities
| City | Expected Rainfall |
|——————–|———————–|
| Long Beach | 0.33 inches |
| redondo Beach | 0.33 inches |
| Santa Clarita | 0.33 inches |
| Thousand Oaks | 0.33 inches |
| Downtown L.A. | 0.40 inches |
| Oxnard | 0.40 inches |
| canoga Park | 0.40 inches |
| Covina | 0.50 inches |
| Santa Barbara | 0.60 inches |
The map accompanying this article illustrates the atmospheric river’s path, highlighting the areas most likely to be affected. This weather phenomenon, often referred to as a ”Pineapple Express” when it originates near Hawaii, is known for its ability to transport vast amounts of moisture over long distances.
Residents are advised to stay informed about local weather updates and take necessary precautions, especially in areas prone to flooding or landslides. While the rainfall is expected to be moderate, it could still lead to hazardous driving conditions and localized disruptions.
For more detailed weather forecasts and safety tips,visit the National Weather Service’s official website.
As Southern California prepares for this weather event, the rainfall could provide a temporary reprieve from the region’s ongoing drought concerns. However, experts caution that sustained precipitation over time is needed to make a significant impact on water reserves.
Stay tuned for further updates as the atmospheric river progresses across the region.Atmospheric River Brings Heavy Rain and Snow to Southern California and Sierra Nevada
A powerful atmospheric river, frequently enough referred to as a “pineapple express,” is set to drench Southern California and the Sierra Nevada region late Thursday, according to the National weather Service. This weather phenomenon, characterized by a long plume of moisture stretching from near Hawaii to the West Coast, is expected to bring significant rainfall and snowfall to the area.The National Weather Service shared a detailed slide illustrating the atmospheric river’s trajectory,emphasizing its potential impact on Southern california. “A slide from the National Weather Service shows an atmospheric river, or a ‘pineapple express,’ of moisture extending from around Hawaii to Southern California, forecasting a storm to hit the region late Thursday,” the report stated.
Snow Levels and Avalanche Warnings
In Los Angeles County, snow levels are predicted to remain high, staying above 6,500 to 8,000 feet above sea level. This means lower elevations will primarily experience rain, while mountainous areas could see significant snowfall.
Simultaneously occurring, in the Sierra Nevada, officials have issued a backcountry avalanche warning for the Lake Tahoe area.The warning, which took effect Tuesday, is a response to heavy snow, rain falling on existing snowpack, and strong winds. “The warning is expected to last through Wednesday,” the report noted, urging residents and travelers to exercise caution in the region.
What to Expect
the atmospheric river is expected to deliver widespread precipitation,with Southern California bracing for heavy rain and the Sierra Nevada preparing for substantial snowfall. The combination of rain and snow in the Sierra could lead to hazardous conditions, particularly in higher elevations.
| Key Details | Information |
|——————————-|———————————————————————————|
| Weather Phenomenon | Atmospheric river (“pineapple express”) |
| Affected Areas | Southern California, Sierra Nevada |
| Snow Levels in L.A. County| Above 6,500 to 8,000 feet |
| Avalanche Warning | Lake Tahoe area, effective Tuesday through Wednesday |
Preparing for the Storm
Residents in affected areas are advised to stay updated on weather forecasts and heed any warnings from local authorities.Travelers in the Sierra Nevada should avoid backcountry areas due to the heightened risk of avalanches.
As the storm approaches,the National Weather Service continues to monitor the situation closely,providing real-time updates to ensure public safety.
For more information on atmospheric rivers and their impact, visit the National Weather Service’s official website. Stay tuned for further updates as the storm develops.
