Storms brought a range of significant weather impacts to northern interior California. The first storm was very wet and warm, the second not quite as wet but cooler with lower snow levels.
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.
Storms brought a range of significant weather impacts to northern interior California. The first storm was very wet and warm, the second not quite as wet but cooler with lower snow levels. Both storms brought strong, damaging winds. The heavy rain brought widespread flooding of small streams and rivers, with some flooding of main stem rivers. Wet conditions from previous storms brought saturated ground and elevated reservoirs, with flood control releases.|There was also mountain snow many feet deep, and damaging winds, with numerous trees down on roads, vehicles, and homes. Many roads, including major highways such as Interstate 80, were shut down due to mudslides, heavy snow, flooding, washouts or avalanche suppression. Other significant impacts include numerous accidents due to slippery roads, evacuations and rescues due to flooding.
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 6, 4:49 AM PST, 11 minutes earlier.
Area Forecast Discussion National Weather Service Sacramento CA 449 AM PST Mon Feb 6 2017 .Synopsis... Series of Pacific storms will bring periods of moderate to heavy rain and mountain snow with strong wind to Interior Northern California this week. && .Discussion... Storm #1 1 is beginning to decrease early this morning as precipitation has turned showery across the lower elevations with rain and high-elevation snow continuing across the northern Sierra. Caltrans traffic cameras continue to show heavy snow along I-80 over Donner Pass. Winds have been trending lower the past several hours as pressure gradients relax a bit, and this morning's wind advisory has been dropped for areas south of Yuba City. Storm #2 moves in later today and this evening with increasingly strong lift and deeper moisture generating moderate to heavy precipitation. Precip forecast to become more focused along and south the I-80 corridor by Tuesday morning. QPF amounts of 1.5-2.5 inches will be possible in the Central Valley while amounts of 4-8 inches will be possible in the foothills and west slopes of the northern Sierra by Tuesday evening. Flood watch has been issued to address potential for flooding of rivers and streams draining the west slopes, and for flood prone areas of the valley. Heavy snow and strong winds will continue in the northern Sierra, but snow levels will steadily rise on Tuesday and are forecast to be above the pass levels by Tuesday afternoon. In addition to the heavy precipitation, winds will increase again later this evening as continue into midday Tuesday. Surface pressure gradient forecast to reach 17 mbs from Fresno to Redding early Tuesday and gusts of around 50 mph will be possible in the valley and foothills. Warm-advection likely to continue lighter precip across the region Wednesday, then storm #3 is forecast to bring an increase in rain again on Thursday. && .EXTENDED DISCUSSION (Friday THROUGH Monday) The second storm this week is expected to arrive on Thursday. This system will bring another round of high precipitation rates, particularly over the mountains. With snow levels initially forecast to be over 8000 feet, a high amount of runoff will also be expected with this storm. One saving grace is that this system is currently forecast to move through the region a bit quicker than the Tuesday storm. That being said, flooding concerns will continue through this storm as water levels will already be running high. Snow levels will be dropping on Friday as the cold front passes through. Expect snow levels to drop down to 5000 ft or possibly lower, with heavy snow expected above those levels. Drier weather will begin on Saturday and continue through the weekend as high pressure builds across the region. Dang && .AVIATION... VFR/MVFR conditions expected across Valley terminals today with off-and-on rain showers. IFR/LIFR conditions continue over the mountains. South wind gusts 40-45 kt across the Valley will weaken this afternoon. The next round of heavy precipitation arrives Monday night, with south wind gusts up to 45 kt possible again. Dang && .STO WATCHES/WARNINGS/ADVISORIES... Flood Watch from this evening through Wednesday afternoon for Carquinez Strait and Delta-Central Sacramento Valley-Motherlode- Northeast Foothills/Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley-West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. Winter Storm Warning until 4 PM PST Tuesday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. Wind Advisory until noon PST today for Carquinez Strait and Delta-Central Sacramento Valley-Clear Lake/Southern Lake County- Motherlode-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Shasta Lake Area / Northern Shasta County-Southern Sacramento Valley. &&
The national radar mosaic for the moment the first event began.
14 heavy rain, 12 flood. Local standard time, as filed.
Heavy rain and southerly winds gusting to near 45 mph caused flooding and knocked out power in the Tulare and Southwood areas of Vacaville. Power restored by 8 am.
There were 1.20 of rain measured over 24 hours in Sacramento.
There were 1.76 of rain measured at Pacific House between 0700-1600.
There were 1.20 of rain measured over 24 hours in Sacramento, between 0700-0700.
Deer Creek overflowed and floodwaters surrounded Sloughouse Inn.
There were 4.43 of rain measured at Redding over 24 hours.
There were 4.35 of rain measured over 24 hours in Redding.
There were 2.64 of rain measured over 24 hours in Sims.
Damage to Orvoville Spillway due to flood releases.
There were 1.75 of rain measured over 24 hours in Oroville.
There were 1.25 of rain measured over 24 hours in Pacific House from 0700-1400.
Discovery Park in Sacramento was flooded, with water about 8 feet deep.
HWY 49 was closed north of Nevada City, from Newtown Rd. to Tyler Foote Rd. due to multiple slip outs.
Green Rd. in Wilton flooded due to levee over topping. Evacuations were ordered for low lying portions of Wilton and Point Pleasant.
HWY 70 was closed from Jarbo Gap in Butte County to Greenville Wye in Plumas County due to flooding.
There were 2.30 of rain measured over 24 hours, 6.16 over 72 hours.
There were 1.49 of rain measured at Kyburz, 24 hour total.
There were 1.80 of rain measured in Placerville, 24 hour total.
There were 3.65 measured over 24 hours at Pacific House.
There were 2.60 of rain measured 4 WSW Castle Crag, 24 hour total.
There were 4.61 of rain measured in Kingvale, 24 hour total.
East and west bound SR-26 were closed from Iris Way to the North Fork Mokelumne River Bridge due to flooding and a slope failure.
Flooding of Clear Lake brought the closure of multiple roads. Lakeshore Boulevard was closed due to flooding between Lange Street and Giselman Street, Other strees closed included Esplanade Street, K Street, Konoctie Avenue, and Lupoyoma Avenue. Clear Lake’s level stayed in flood stage for a month and led to mandatory evacuations in parts of the city of Lakeport. Lake County Public Works Director said early assessments suggested damage to county-maintained roads ranged between $5 million and $7 million.
Flood waters were reported in several homes in Acampo.
A freight train carrying food products derailed Friday afternoon near Elk Grove in Sacramento County, sending 22 train cars into the Cosumnes River near Highway 99, according to the Cosumnes Fire Department. A levy on the river nearby had broken, eroding the material under the railroad trestle the train went over, apparently causing the derailment.
Three levees along the Cosumnes River were breached Friday night at Pear Lane, allowing flood waters into the Wilton area. Localized flooding closed Green Road and others nearby roads as waters into Dillard Road. Several roads remained closed through the night, according to the Sacramento County Office of Emergency Services.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2017Every state in 2017This day in weather historyWarnings in California, February 2017
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: 682202, 682208, 682210, 682211, 682203, 682204, 682205, 682206, 682207, 682209, 682212, 682213, 682216, 682217, 682218, 682219, 682221, 682222, 682220, 682223, 682224, 682225, 682602, 682603, 682806, 682600.