01:17 Making Snowflakes Any Time of the Year The Weather Channel meteorologist Kelly Cass looks at how you can make a snowflake any season of the year.

At a Glance February snow records are falling in the Sierra.

The combination of this, plus high winds, is shutting down travel in the Sierra. Another atmospheric river event is pummeling California with feet of snow in the Sierra Nevada Mountains, shattering February snow records at some ski resorts while also triggering flooding, rockslides and mudslides in lower elevations.

Happening Now

Heavy snow continues to pound the Sierra, generally above 5,000 feet, while rain persists in the lower elevations of Northern California.

Gusty winds are also expected into this evening in some locations.

(INTERACTIVE: Current Radar/Satellite Loop )

Tuesday night into early Wednesday, numerous roadways were flooded in Northern California, including the Bay area. Several mudslides and rockslides were also reported, as were downed trees and power lines.

Venado, California, measured 20.48 inches of rainfall through early Wednesday.

(LATEST: Flooding, Mudslides, Travel Impacts)

As of Wednesday morning, 55 inches of snow fell in Boreal , with 54 inches at Sugar Bowl Ski.

The combination of heavy snow and high winds prompted Interstate 80 to shut down overnight Monday night into Tuesday.

Several other routes into the Sierra were shut down Tuesday as well, according to Caltrans .

Many Sierra ski locations reported at least a foot of snow in 24 hours ending Tuesday morning. Caltrans reported 40 inches of snow had fallen in 24 hours at Donner Pass.

Despite all the snow, it was too windy to ski at some Sierra resorts. Lifts were on hold at Mammoth Mountain , and some lifts were closed Monday at Heavenly .

Strong winds have also been blasting parts of Northern California and Nevada. Winds gusted between 50 and 60 mph in Reno, Nevada, on Tuesday.

Rain soaked the lower elevations of Northern California on Tuesday, mainly north of Interstate 80, and that has triggered flooding and some landslides.

A number of mudslides shut down State Highway 49 in multiple locations . Just over 5 inches of rain was reported in Quincy, California, about 35 miles east-northeast of the fire-scarred town of Paradise.

Flooding was also reported in parts of Marin County, California, and the Napa Valley. All access roads into Point Reyes National Seashore, north of San Francisco, were flooded Tuesday morning.

Active Weather Pattern in the West

This round of rain and snow is just the latest in a series of storms that have impacted the West in February.

Mammoth Mountain has already clobbered its previous record-snowiest February , picking up 198 inches of snow so far this month.

Squaw Valley is likely to set its snowiest month on record , already measuring over 21 feet of snow this month before this storm kicked into gear.

Tuesday morning, a snow depth of 226.9 inches was estimated by the National Resources Conservation Service SNOTEL network at a sensor about 20 miles southwest of Truckee, California. Another sensor at Nevada's Mt. Rose Ski Area estimated a whopping 320 inches of snow cover at an elevation of 8,850 feet.

Most importantly, the Sierra is an important source of water for California when winter's snowpack melts in the dry season from late spring through early fall.

(MORE: West's Active Winter So Far Has Had a Huge Impact on Drought)

According to the California Department of Water Resources, the statewide water content of the Sierra snowpack was estimated to be 41 percent above average for Feb. 26 .

Most state reservoirs were above their average levels for late February as well.