A winter storm brought light mountain snow to the Sierra Nevada for elevations above 6500 feet.
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 winter storm brought light mountain snow to the Sierra Nevada for elevations above 6500 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 Nov 6, 2:25 AM PST, 8 hours 35 minutes earlier.
Area Forecast Discussion National Weather Service Sacramento CA 325 AM PDT Sat Nov 6 2021 .SYNOPSIS... Light rain showers, and some high elevation snow showers are expected today. A wetter weather system is forecast early next week, bringing widespread rain and mountain snow. && .DISCUSSION... Some very light precipitation has continued over night across the northern mountains where amounts have ranged from a few hundredths of an inch up to 0.20 inches locally. Otherwise dry conditions persist as clouds continue to stream into NorCal from the west- southwest ahead of the slowly approaching frontal system. Current temperatures are fairly mild ranging from mainly the 30s and 40s in the mountains, to the upper 40s to upper 50s across the Central Valley. Mostly light precipitation will be on the upswing across mainly the northern half of the forecast area by midday as the front sags further south and the offshore wave (presently near 35N/135W) moves onshore. CAMS continue to indicate potential for some isolated thunderstorms this afternoon over the northern Sacramento Valley behind the front. QPF will be generally light, mostly a few hundredths of an inch in the valley with around 1/2 to 3/4's of an inch in the northern Sierra. Snowfall up to 6 inches will be possible this afternoon and evening over the crest of the northern Sierra, and some travel impacts can be expected across the higher passes. A Winter Weather Advisory has been posted for elevations above 6.5k ft. Precipitation winds down this evening and a break is expected Sunday through most of Monday. Clearing skies and lighter winds may allow for some patchy frost to develop early Sunday morning across the north end of the Sacramento Valley. Still looks like a more impactful system will affect the region later Monday into Tuesday with heavier precipitation and potentially stronger winds than recent systems. Still lots of spread in the ensemble precipitation amounts, but looks like most of the valley will see a minimum of an inch of rain while the foothills and mountains see about 2-3 inches. Lower snow levels and heavier snow amounts may bring increasing travel impacts to the northern Sierra highways, and possibly on Interstate 5 north of Redding. && .EXTENDED DISCUSSION (Wednesday THROUGH Saturday)... A few showers may linger in the higher elevations early Wednesday as the upper level trough pushes to the east. Dry weather will then set in for the remainder of the period as upper level ridging builds in from the west. Ridging will be strong by the end of the week but may flatten some into next weekend. Temperatures will remain cool on Wednesday but will warm to above average by the end of the week. -CJM && .AVIATION... VFR to local MVFR conditions for the northern terminals, northern Sac Valley and mountains into this afternoon due to light showers and BKN to OVC clouds 030-050. VFR conditions at the the other terminals with BKN to OVC clouds 070-100. Surface winds remain under 12 knots except over the higher elevations where gusts to 20 knots will be possible. && .STO WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory from 11 AM this morning to midnight PDT tonight for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. &&
1 winter storm. Local standard time, as filed.
A CoCoRaHS located 1.5 miles SSW of Soda Springs reported 3 inches of storm total snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2021Every state in 2021This day in weather historyWarnings in California, November 2021
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: 992233.