Weather and road condition report for Lake Tahoe

4:00 p.m. UPDATE: Interstate 80 has reopened at this time, but tractor-semitrailer combinations are not allowed due to traction concerns. SR88 is closed at the Carson Spur with no time estimated of reopening.Hwy 50 over Echo Summit is reopened after a collision was cleared. Most roads in the Sierra are requiring chains or 4WD with snow tires.

SOUTH LAKE TAHOE, CALIF. - It is currently snowing lightly in South Lake Tahoe, with Blizzard Warning remaining in place until 4:00 a.m. Friday, March 2 and a Winter Storm Warning in effect until Saturday morning at 10:00 a.m. The forecast calls for 18" to 26" at lake level on Thursday.

There is also an Avalanche Warning in the Tahoe Basin backcountry until Friday at 7:00 a.m.

The weekend forecast:

Today - Snow. High near 32. Windy, with a south wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 9 to 13 inches possible.

Tonight - Snow. Low around 22. Breezy, with a southwest wind 20 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 9 to 13 inches possible.

Friday - Snow. High near 27. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

Friday Night - Snow. Low around 16. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Saturday - Snow showers likely, mainly before 10am. Mostly cloudy, with a high near 26. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

Saturday Night - A 30 percent chance of snow showers. Mostly cloudy, with a low around 7. New snow accumulation of less than one inch possible.

Sunday - Mostly sunny, with a high near 33.

Chain controls are up on most mountain roads as of 8:20 a.m. on March 1:

R1 controls: Chains are required - snow tread tires allowed
R2 controls: Chains are required on all vehicles except four wheel drive vehicles with snow tires on all four wheels

SR-89 - R2 - PICKETS TO LUTHER / MARKLEVILLE TO WOODFORDS
SR-88 - R2 - OK CORRAL TO PAYNESVILLE
SR-89S - R2 - MEYERS TO LUTHER
HWY 50 - R2 - SAND FLAT TO MEYERS
SR-28 - R1 - TAHOE CITY TO STATELINE
SR-89S - R1 - BLISS TO TRKE
SR-267 - R2 - BYPASS TO KB
SR-207 - CHAINS OR SNOW TIRES - US50 JUNCTION TO MILE POST 7 IN DOUGLAS COUNTY
HWY 50 - CHAINS OR SNOW TIRES - SOUTH LAKE TAHOE TO MILE POST 1 IN CARSON CITY
SR-28 - CHAINS OR SNOW TIRES - SPOONER SUMMIT TO MILE POST 11 IN WASHOE COUNTY

For up to the minute conditions visit http://quickmap.dot.ca.gov/ for California roads and http://nvroads.com/ for all Nevada roads.