A warm atmospheric river system brought periods of heavy rain, road flooding and gusty winds from February 1st through 2nd. This brought 48 hour totals from 5 to 10 inches of rain over the mountains, to 3 to 6 inches into the northern Sacramento Valley and for the foothills.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS STO wrote it up.
A warm atmospheric river system brought periods of heavy rain, road flooding and gusty winds from February 1st through 2nd. This brought 48 hour totals from 5 to 10 inches of rain over the mountains, to 3 to 6 inches into the northern Sacramento Valley and for the foothills. Gusty southerly wind gusts of 25 to 35 mph were recorded in the Valley, with gusts up to 45 mph in the mountains and foothills, with some downed trees reporters. Roads were reported flooded, as well as covered with mud and rocks in some mountain areas. Snow levels were initially high, over 8000 feet, then dropped to around 5500 feet. Snow amounts were around 3 to 6 inches above 6000 feet, up to 8 inches for high peaks above 8000 feet.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before the first event at Feb 1, 1:24 PM PST, 4 hours 9 minutes earlier.
Area Forecast Discussion National Weather Service Sacramento CA 124 PM PST Sat Feb 1 2025 .SYNOPSIS... Active weather continues into next week with extended periods of moderate to heavy rain, mountain snow, and gusty southerly winds. Colder storms are expected to bring heavy snow and major travel impacts to the mountains next week. && .DISCUSSION... Widespread rain is ongoing across much of Interior Northern California with snow occuring over the high elevations of the Sierra. Current preciptiation accuulation estimates show around 0.01-0.50" in the Valley, 1 to 2 inches over the Sierra and 1 to 3 inches in acros the Northern Sac. Valley, including the Coast Range. Snow levels will continue to rise today to above ~8500 feet south of a rough line from Lassen to the Coast Range with most snowfall ceasing by tonight. We can expect moderate travel impacts today and tomorrow ahead of continued active weather into next week. Total snow accumations of around 5 to 10 inches can be expected through tomorrow night above 6500 feet with higher amounts along the highest peaks. As a result, our Winter Weather Advisory remains in effect for the West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties until 4 AM Sunday morning. Please plan for slippery travel condirions with mountain travel delays and chain controls! Transitioning to rain impacts for this weekend, we can continue to expect periods of moderate to heavy rain through Sunday with heavier bands today compared to tomorrow. Additional rain accumulations of 0.50-1.00 in the Southern and Central Sac. Valley, higher as you up elevation towards the Sierra is forecasted with around 3 to 8 inches over the Sierra and 1.5 to 4 inches over the Northern Sac. Valley and Southern Cascade area. Highest amounts in the Sierra will be near the Feather River Valley area up to 8-10 inches. No debris flow impacts are expected over burn scars. There is the potential for mud and rock slides in the foothills and mountains below 6500 feet, with accumulating snow at higher elevations. As a result, our Flood Watch remains in effect Interior northern California at elevations below 6500 feet, including the Delta, the Central Valley and adjacent foothills and mountains. A second, colder system is expected Monday through Tuesday night bringing another round of rain, mountain snow, and breezy winds. Snow levels start high (6000 to 7000 feet), but will drop Tuesday morning as colder air moves into the area and more earnestly on Wedesday AM. By Wednesday early morning, snow levels are expected to fall to around 3000 to 4000 feet in the southern Cascades, and 4000 to 5000 feet in the Sierra. Current forecast have Sierra and portions of Southern Cascades with 1 to 3 feet of snow, up to 4 along the highest peaks. Major travel impacts contine to be expected with snow covered/slippery roads, chain control, travel delays, and reduced visilibiitlies at times all expected. Lastly, with both waves, gusty south winds will accompany the precipitation with 25-40 MPH in the Valley and 40-55 MPH over the mountains. Monday looks to be the widespread day for strong winds but Sudnay night over the northeastern foothills have the strongest period of winds. Be sure to secure any outdoor item and watch for downed tree limbs. Over the next several days, travel impacts are expected across interior NorCal so be sure to check road conditions at quickmap.ca.dot.gov and weather conditions at weather.gov before heading out the door! && .EXTENDED DISCUSSION (Wednesday THROUGH Saturday)... Cluster analysis and ensembles continue to show active weather continuing through much of the remainder of next week, with additional moderate rain and heavy mountain snow totals. The third storm of this atmospheric river system has trended wetter and will be much colder than the first two and currently is expected to continue through Friday. While the latest snow levels have trended up slightly, they are still falling quite low at 1700 to 2500 feet in the southern Cascades, and 3000 feet in the Sierra by late Wednesday morning. This, combined with continued moderate precipitation rates will likely lead to significant travel impacts to mountain roads, including I-80 and I-5. Snow totals over the Sierra could reach 4 to 5 feet of additional snow, though there remains some uncertainty in the exact trajectory of the main plume of moisture in this second wave of weather and thus the exact rain and snow totals. With the lower snow levels there is even a non- zero chance for Redding to see light snow, with a 9% probability of 1 inch of snow Wednesday and Thursday. Be sure to prepare now for the continued wet and wintry weather, especially if you plan to travel in the mountains! In additions to precipitation, periods of gusty southerly winds are also expected to continue. For the next weekend, ensembles currently suggest a drier pattern may return. && .AVIATION... Widespread MVFR conditions, with areas of IFR and LIFR are expected to continue across NorCal as an atmospheric river continues to move through the area. Precipitation is forecast to continue, with periodic breaks in the Valley over the next 24 hours. Heaviest precipitation is forecast to be focused in the NE foothills and in the Sierra. Snow levels are forecast to remain around 7500+ feet. Southerly surface winds are expected across the Valley to around 15 knots and gusting up to 25-30 knots in the central Sacramento Valley and Delta by 04z Sunday. Southerly wind gusts up to 60 knots are expected in the Sierra Mountains. && .STO WATCHES/WARNINGS/ADVISORIES... Flood Watch through Sunday evening for Carquinez Strait and Delta-Central Sacramento Valley-Motherlode-Mountains Southwestern Shasta County to Western Colusa County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Shasta Lake Area / Northern Shasta County- Southern Sacramento Valley-West Slope Northern Sierra Nevada- Western Plumas County/Lassen Park. Winter Weather Advisory until 4 AM PST Sunday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. &&
Preliminary Local Storm Report
National Weather Service Sacramento CA
1135 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM Snow 2 E Lake Spaulding 39.32N 120.60W
02/01/2025 M2.0 Inch Nevada CA Dept of Highways
24 hour snowfall report of 2.0 inches at
elevation of 5593 feet.
&&
NRPreliminary Local Storm Report
National Weather Service Sacramento CA
1136 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM Snow 2 NNW Cisco 39.32N 120.56W
02/01/2025 M1.0 Inch Nevada CA Dept of Highways
24 hour snowfall report of 1.0 inches at
elevation of 5567 feet.
&&
NRPreliminary Local Storm Report
National Weather Service Sacramento CA
1137 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM Snow Soda Springs 39.32N 120.38W
02/01/2025 M3.0 Inch Nevada CA Dept of Highways
24 hour snowfall report of 3.0 inches at
elevation of 6819 feet.
&&
NRPreliminary Local Storm Report
National Weather Service Sacramento CA
1138 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM Snow 2 NE Soda Springs 39.34N 120.35W
02/01/2025 M3.0 Inch Nevada CA Dept of Highways
24 hour snowfall report of 3.0 inches at
elevation of 7165 feet.
&&
NRPreliminary Local Storm Report
National Weather Service Sacramento CA
1146 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0544 AM Snow 3 ESE Twin Bridges 38.80N 120.07W
02/01/2025 M5.0 Inch El Dorado CA Public
24 hour snowfall report of 5.0 inches at
elevation of 8852 feet.
&&
NRPreliminary Local Storm Report
National Weather Service Sacramento CA
1147 AM PST Sat Feb 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0544 AM Snow 3 ESE Twin Bridges 38.80N 120.07W
02/01/2025 M3.0 Inch El Dorado CA Public
24 hour snowfall report of 3.0 inches at
elevation of 6883 feet.
&&
NRThe national radar mosaic for the moment the first event began.
16 flood. Local standard time, as filed.
California Highway Patrol reported roadway flooding of the westbound lane at State Route 174 and Brunswick Drive from heavy rain.
California Highway patrol reported roadway flooding of one lane on US Highway West and Ridgeway Drive offramp from heavy rain.
California Highway Patrol reported roadway flooding from heavy rain on Old Alturas Road with water across the whole roadway and along the bridge.
The California Highway Patrol reported a mud, dirt and rock slide in the eastbound lane at State Route 299 and Fenders Ferry Road from heavy rain.
The California Highway Patrol reported multiple roadway flooding reports in Shasta County from heavy rain.
The California Highway Patrol reported roadway flooding of the eastbound lane on State Route 32 near Butte Meadows.
The California Highway Patrol reported roadway flooding of the southbound lane at Deschutes Road and State Route 299 from heavy rain.
The California Highway Patrol reported roadway flooding from heavy rain at Granada Drive and Bonita Way.
The California Highway Patrol reported roadway flooding at Old 44 Drive and Patrick Lane from heavy rain.
The California Highway Patrol reported roadway flooding at Swede Creek Road and Ford Lane, leading to closure of the roadway.
The California Highway Patrol reported the roadway completely flooded at Deschutes Road and Boyle Road from heavy rain.
The California Highway Patrol reported roadway flooding across both lanes at Lower Honcut Road and Palermo Honcut Highway from heavy rain.
The California Highway Patrol Reported roadway flooding on Spring Gulch Road and State Route 273. Multiple vehicles stuck in 3 feet of water on the roadway. Vehicles not movable at this time.
The California Highway Patrol reported roadway flooding at Deschutes Rd. and State Route 44 near Palo Cedro from heavy rain.
The California Highway Patrol Reported roadway flooding at Vista Oaks Drive and Deschutes Road from heavy rain.
The California Highway Patrol Reported roadway flooding on Lake California Drive from heavy rain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2025Every state in 2025This day in weather historyWarnings in California, February 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1237921, 1237922, 1237925, 1237926, 1237929, 1237931, 1237934, 1237936, 1238249, 1238250, 1238259, 1238262, 1238266, 1238267, 1238268, 1238269.