Redeveloping thunderstorms brought road flooding and a minor debris flow from heavy rain, An avalanche closed Highway 50 at Echo Summit. Up to 3 inches of snow fell in the Sierra.
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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.
Redeveloping thunderstorms brought road flooding and a minor debris flow from heavy rain, An avalanche closed Highway 50 at Echo Summit. Up to 3 inches of snow fell in the Sierra.
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 Apr 1, 2:09 PM PST, 51 minutes earlier.
Area Forecast Discussion National Weather Service Sacramento CA 309 PM PDT Mon Apr 1 2019 .SYNOPSIS... Unsettled weather this week as a trio of systems impact Northern California. The Friday/Saturday system will likely be the strongest with heavy precipitation and lower snow levels. && .DISCUSSION... A broad area of mid to high-level clouds have overspread the region in advance of the system looming offshore. Warm advection precipitation will move through the region this afternoon with perhaps some embedded rumbles of thunder north of Sacramento. Some enhanced cloud tops noted in recent visible satellite imagery would extrapolate toward areas north of I-80 this afternoon and evening. The attendant cold front is forecast to move through early Tuesday morning which would mark the corridor of more widespread precipitation, locally heavy in some locations. As the stronger forcing shifts toward the foothills and mountains Tuesday morning, a brief period of moderate to heavy snow will be possible. This will mainly be at elevations 7,000 feet and above where a Winter Weather Advisory is in effect from south of I-80 down to Tuloumne County and Alpine Counties. Some lighter accumulations will be possible down to 6,500 feet as snow levels drop in the wake of the frontal passage. Tuesday afternoon should prove to be a showery day with instability aloft fostering the development of scattered convection. Any of these thunderstorms could produce heavy rainfall, small hail, and gusty winds. All and all, the northern Sacramento Valley can expect the heaviest storm total within the lower elevations with 0.50-1.00 inches likely through Tuesday. Slightly higher amounts are expected toward the foothills given favorable upslope enhancements. Things should wind down by Tuesday night as the eastern extent of an offshore ridge approaches. While Wednesday should be dry for most, some scattered showers cannot be ruled out over the northern mountains. These should not amount to much given the transient ridge overhead. By Thursday morning, an upper trough similar to the one arriving today will impact the region. Snow levels should be slightly lower with this system, likely in the 6,000 to 6,500 foot range. It is expected to be a quick mover as it exits the state by later that night. ~BRO && .EXTENDED DISCUSSION (Friday THROUGH Monday) A well advertised late-season Atmospheric River will begin to impact the region Friday into the weekend. To varying degrees this system has been primed to affect Northern California since ensemble solutions advertised it back on March 24/25. The Atmospheric River Detection Tool currently places this system on the fringe of a Weak to Moderate type event. Expect an unsettled Friday into the first half of Saturday with rainfall amounts in the 1.00-2.00 inch range over the northern Sacramento Valley while 0.50 to 1.00 inches would be more commonplace to the south. Terrain effects will boost amounts on the foothills and mountains where up to 3 inches is possible. GEFS ensemble plume diagrams at some local sites show the potential for nearly double these amounts so it continues to bear watching. Mountain travel impacts are likely, particularly as the storm moves through during the weekend. Forecast snow levels are around 6,000 feet, possibly fluctuating to 5,500 feet on Saturday morning. The remainder of Saturday will be showery in the wake of the frontal passage. Broad west-southwesterly flow over the Pacific allows additional weak shortwaves to move through over the weekend. Thus, have kept a chance for precipitation in play before heights build on Monday allowing for a return to warmer, drier conditions. ~BRO && .AVIATION... Areas MVFR in pcpn developing at the Valley TAF sites tonight, mostly over the Nrn and Central Sac Vly thru 12z Tue. VFR with areas light showers Srn Sac and Nrn SJV this evening with conditions lowering to 030-040 in showers by and after 12z Tue Local Sly sfc wnd gsts to 25 kts possible in the Nrn and Central Sac Vly aft 00z Tue, along with isold -TSRA til 08z. Omtns, areas SWly sfc wnd gsts up to 35 kts poss nxt 24 hrs with widespread MVFR to IFR/LIFR conditions with pcpn developing overnite. && .STO WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory from 11 PM this evening to 5 PM PDT Tuesday for West Slope Northern Sierra Nevada. &&
The Beale AFB radar (KBBX), 39 km away, was scanning. The volume nearest the first event began at 21:01 UTC.
5 flood, 2 flash flood, 1 avalanche, 1 heavy rain, 1 thunderstorm wind. Local standard time, as filed.
Caltrans reported the closure is between Echo Summit and Chiapa Road in nearby Meyers, reopening at 5 p.m. PST.
About 3 of heavy rain reported.
Downed trees reported near West Sacramento Ave. and River Road. Time estimated.
Two feet of standing water was observed on Pillsbury Road between Cohasset Rd. and East Ave. Much of Cohasset Road from Highway 99 to Chico Airport was underwater as well. Time was estimated.
Flooding was reported across all 3 lanes southbound on Highway 99.
The east bound lane of Highway 36 was reported by the CHP to be flooded.
Gas Point Road off-ramp at Highway 5 South, west bound land reported flooded.
Street flooding reported on W Eaton Road approximately 1 mile west of Highway 99. Photos indicated flooding well up driveways to near homes in residential areas witha a depth of about 1.5 feet.
Floodwaters rose around it due to a combination of backwater effect caused by a partially plugged culvert and a breach in an upstream levee along the right bank of Rock Creek.
Heavy rainfall around 9 pm Friday caused flooding near Rock Creek and Paige Boulder Creek near the community of Old Shasta. Rock Creek jumped its banks and occupied portions of the flood plain along Rock Creek Road and over topped several crossings.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2019Every state in 2019This day in weather historyWarnings in California, April 2019
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: 821593, 821384, 821383, 821386, 821387, 821388, 821389, 821385, 821600, 821390.