Sunday update: Controls on all mountain roads; blizzard conditions possible through Tuesday

SOUTH LAKE TAHOE, Calif. - It's the middle of a four-day storm in the Sierra with all mountain roads impacted by the snow. There is a Winter Storm Warning in effect until 4:00 p.m. Tuesday with the next wave of it expected to hit Lake Tahoe by 4:00 p.m. Sunday.

According to the National Weather Service in Reno, heavy snow is forecast along with gusty winds. Total snow accumulations of 2 to 6 feet at lake level, with 5 to 10 feet above 7000 feet expected. Snow drifts could be deeper than 10 feet. Winds gusting as high as 50 mph Sunday afternoon into Monday with gusts to 100 mph over ridges. A period of blizzard conditions is possible Sunday night into Tuesday morning.

Road controls around the Lake Tahoe Basin as of 9:30 a.m. Sunday:

US50
Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on US-50 from milepost 0.0 in Douglas County to milepost 0.5 in Douglas County in Nevada.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on US-50 from milepost 0.0 in Douglas County to milepost 4.5 in Carson City County in Nevada.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on US-50 from milepost 52.1 in El Dorado County to milepost 70.6 in El Dorado County in California.

I80
Chains or Snow Tires Required - on I-80 from California Stateline to Mogul in Nevada.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on I-80 from milepost 49.0 in Placer County to milepost 0.0 at Washoe County/California border.

SR88
Chains Required - All Vehicles Except 4-Wheel Drive with Snow Tires - on CA-88 from milepost 38.4 in Amador County to milepost 22.7 in Alpine County in California.

Road Closed - At Carson Spur, from 3.5 miles east of Silver Lake to Kirkwood due to snow. Motorists are advised to use an alternate route.

Chains Required - All Vehicles Except 4-Wheel Drive with Snow Tires - on CA-88 from milepost 38.4 in Amador County to milepost 22.7 in Alpine County in California.

SR89
Road Closed - At Emerald Bay - CA-89 from milepost 11.1 in El Dorado County to milepost 21.0 in El Dorado County in California.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on CA-89 from milepost 21.0 in El Dorado County to milepost 0.0 in Placer County in California

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on CA-89 from milepost 21.0 in El Dorado County to milepost 0.0 in Placer County in California.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on CA-89 from milepost 21.4 in Alpine County to milepost 6.7 in El Dorado County in California.

I580
Chains or Snow Tires Required - on I-580 from milepost 6.5 in Washoe County to milepost 15.0 in Washoe County in Nevada.

Wind Alert - Vehicles Over 9 Feet Use Caution - on I-580 from Eastlake Boulevard (Exit 44) to Mt Rose Highway (Exit 56) in NV

SR207
Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on SR-207 from Dagget Pass Chain-Up Area to milepost 7.0 in Douglas County in Nevada.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on SR-207 from US-50 Junction to Dagget Pass Chain Up Area in Nevada.

SR267
Chains or Snow Tires Required - on SR-267 from milepost 3.8 in Placer County to milepost 0.0 in Nevada County in California.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on SR-267 from milepost 9.9 in Placer County to milepost 3.8 in Placer County in California.

SR28
Chains or Snow Tires Required - on SR-28 from milepost 2.7 in Placer County to milepost 11.0 in Washoe County in California.

Chains or Snow Tires Required - on SR-28 from US-50 Junction to Crystal Bay in Nevada.

Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on SR-28 from milepost 0.0 in Placer County to milepost 2.7 in Placer County in California.

SR431
Chains Required, All Vehicles Except 4-Wheel Drive with Snow Tires - on SR-431 from State Route 28 to Thomas Creek Road in Nevada.

For up to the minute road conditions:
California - http://quickmap.dot.ca.gov/
Nevada - https://nvroads.com/