* WHAT. South winds 20 to 30 with gusts 40 to 50 mph for Sierra valleys and 50 to 60 mph with gusts up to 100 mph along the highest peaks. For Lake Tahoe, south winds 20 to 30 mph with gusts up to 50 mph and wave heights 2 to 4 feet. * WHERE. Greater Lake Tahoe Area. * WHEN. Until 10 PM PST this evening. * IMPACTS. Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

* WHAT. Wet snow above 8000 feet. Snow accumulations up to 4 inches above 8000 feet and up to 2 inches between 7500 and 8000 feet. South winds 10 to 15 mph gusting to 25 mph in Sierra valleys, and winds gusting as high as 60 mph along the highest peaks before 4 AM. On Lake Tahoe, wind gusts up to 25 mph with wave heights up to 2 feet before 4 AM. * WHERE. Greater Lake Tahoe Area. * WHEN. From 10 PM this evening to noon PST Friday. * IMPACTS. Plan on slippery road conditions. The hazardous conditions could impact the Friday morning commute. Strong winds could cause damage to trees and power lines.

* WHAT. Wet snow above 8000 feet. Snow accumulations up to 6 inches above 8000 feet and up to 4 inches between 7500 and 8000 feet. Winds gusting as high as 90 mph along the highest peaks and 30 to 40 mph for Sierra communities. On Lake Tahoe, wind gusts up to 40 mph with wave heights of 2 to 4 feet. * WHERE. Greater Lake Tahoe Area. * WHEN. From 4 PM Thursday to 7 AM PST Friday. * IMPACTS. Travel may be very difficult, especially across mountain passes such as Donner Pass, Carson Pass, and Ebbetts Pass. The hazardous conditions could impact the Thursday morning and evening commutes. Strong winds could cause damage to trees and power lines.

* WHAT. Wet snow above 8000 feet. Snow accumulations up to 6 inches above 8000 feet and up to 4 inches between 7500 and 8000 feet. Winds gusting as high as 90 mph along the highest peaks and 30 to 40 mph for Sierra communities. On Lake Tahoe, wind gusts up to 40 mph with wave heights of 2 to 4 feet. * WHERE. Greater Lake Tahoe Area. * WHEN. From 1 PM Thursday to 7 AM PST Friday. * IMPACTS. Travel may be very difficult, especially across mountain passes such as Donner Pass, Carson Pass, and Ebbetts Pass. The hazardous conditions could impact the Thursday morning and evening commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS. Precipitation may transition to rain by late Thursday morning before returning to snow by late Thursday afternoon.

* WHAT. Wet snow above 8000 feet. Snow accumulations up to 6 inches above 8000 feet and up to 4 inches between 7500 and 8000 feet. Winds gusting as high as 90 mph along the highest peaks. * WHERE. Greater Lake Tahoe Area. * WHEN. From 1 PM Thursday to 7 AM PST Friday. * IMPACTS. Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening and Friday morning commutes. Very strong winds could cause extensive damage to trees and power lines.

* WHAT. Snow above 7000 feet. Snow accumulations of 4 to 10 inches with 8 to 16 inches along the Sierra crest. 1 to 3 inches of snow accumulation at lake level possible. Wind gusts exceeding 100 mph on ridges. On Lake Tahoe, wind gusts up to 40 mph with wave heights of 2 to 4 feet. * WHERE. Greater Lake Tahoe Area. * WHEN. From 1 AM Thursday to 4 AM PST Friday. * IMPACTS. Travel may be very difficult, especially across mountain passes such as Donner Pass, Carson Pass, and Ebbetts Pass. The hazardous conditions could impact the Thursday morning and evening commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS. Precipitation may transition to rain by late Thursday morning before returning to snow by late Thursday afternoon.

* WHAT. Snow above 7000 feet. Snow accumulations of 4 to 10 inches with 8 to 16 inches along the Sierra crest. 1 to 3 inches of snow accumulation at lake level possible. Wind gusts exceeding 100 mph on ridges. On Lake Tahoe, wind gusts up to 40 mph with wave heights of 2 to 4 feet. * WHERE. Greater Lake Tahoe Area. * WHEN. From 1 AM Thursday to 4 AM PST Friday. * IMPACTS. Travel may be very difficult, especially across mountain passes such as Donner Pass, Carson Pass, and Ebbetts Pass. The hazardous conditions could impact the Thursday morning and evening commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS. Precipitation may transition to rain by Thursday morning before returning to snow by late Thursday afternoon.

* WHAT. Heavy snow above 7000 feet. Snow accumulations of 4 to 10 inches with 8 to 18 inches along the Sierra crest. 1 to 5 inches of snow accumulation at lake level. Wind gusts exceeding 100 mph on ridges. * WHERE. Greater Lake Tahoe Area. * WHEN. From late Wednesday night through late Thursday night. * IMPACTS. Travel could be very difficult, especially across mountain passes such as Donner Pass, Carson Pass, and Ebbetts Pass. The hazardous conditions could impact the Thursday morning and evening commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS. Uncertainty in the storm track and snow levels mean amounts could be higher, with a 25 percent probability of up to 8 inches at lake level, 18 inches at passes, and 30 inches on the crest.