* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations of 1 to 4 inches at lake level with 6 to 10 inches above 7000 ft. Snow accumulations up to 12 inches at the highest peaks. Ridge winds gusting up to 65 mph. Southwest winds 10 to 15 mph with gusts up to 30 mph and wave heights 1 to 3 feet on Lake Tahoe. For the Winter Storm Warning, heavy snow. Snow accumulations of 3 to 8 inches below 6500 ft with 8 to 20 inches above 6500 feet. Snow accumulations of 6 to 14 inches west of Highway 89 with up to 30 inches along the Sierra crest. Ridge winds gusting up to 120 mph. Southwest winds 15 to 25 mph with gusts up to 45 mph and wave heights of 2 to 4 feet on Lake Tahoe.

* WHERE...Greater Lake Tahoe Area.

* WHEN...For the Winter Weather Advisory, until 10 PM PST this evening. For the Winter Storm Warning, from 1 PM Friday to 10 PM PST Saturday.

* IMPACTS...For the Winter Weather Advisory, plan on slippery road conditions. The hazardous conditions could impact the Thursday evening commute. Gusty winds and wave heights could impact boating conditions. For the Winter Storm Warning, travel could be very difficult to impossible. The hazardous conditions could impact the Friday and Saturday commutes. Very strong winds could cause extensive damage to trees and power lines. Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations of 1 to 4 inches at lake level with 6 to 10 inches above 7000 ft. Snow accumulations up to 12 inches at the highest peaks. Ridge winds gusting up to 65 mph. Southwest winds 10 to 15 mph with gusts up to 30 mph and wave heights 1 to 3 feet on Lake Tahoe. For the Winter Storm Warning, heavy snow. Snow accumulations of 3 to 8 inches below 6500 ft with 8 to 20 inches above 6500 feet. Snow accumulations of 6 to 14 inches west of Highway 89 with up to 30 inches along the Sierra crest. Ridge winds gusting up to 120 mph. Southwest winds 15 to 25 mph with gusts up to 45 mph and wave heights of 2 to 4 feet on Lake Tahoe.

* WHERE...Greater Lake Tahoe Area.

* WHEN...For the Winter Weather Advisory, until 10 PM PST this evening. For the Winter Storm Warning, from 1 PM Friday to 10 PM PST Saturday.

* IMPACTS...For the Winter Weather Advisory, plan on slippery road conditions. The hazardous conditions could impact the Thursday evening commute. Gusty winds and wave heights could impact boating conditions. For the Winter Storm Warning, travel could be very difficult to impossible. The hazardous conditions could impact the Friday and Saturday commutes. Very strong winds could cause extensive damage to trees and power lines. Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.