A winter weather advisory is in effect for much of Southcentral Alaska through Thursday evening as a snow/rain mix along with freezing rain spreads across the region. Expect icy roads and surfaces into the night. 

Anchorage School District is canceling all after-school activities today due to the deteriorating road conditions.

Anchorage police called for drivers to exercise caution on local roads Thursday morning, noting that conditions were "EXTREMELY slick" on the Seward Highway near the weigh station south of Potter Marsh.

"Please take it slow while driving," police wrote.

The jet stream continues to aim a fire hose of warm tropical moisture right at Southcentral. Temperatures started out below freezing during the morning hours, but will quickly warm to the mid-30s by the afternoon. Despite the warmer air temperatures, many surfaces will remain below freezing.

Showers will gradually spread from the Gulf Coast north and west into Anchorage, Kenai, and the Mat-Su while continuing across Prince William Sound and into the Copper River Basin.  All of those areas are under winter weather advisories Thursday.

Here's what you can expect by region:

Anchorage, Kenai, Palmer, and Wasilla: Chances for light showers through the morning will quickly transition to a more steady snow/rain mix and freezing rain in the afternoon and evening. Accumulations will be light with up to 1" of snow and 0.1-0.2" of ice for most areas. High temperatures will top out in the mid-30s. 

Talkeetna will also see snow transitioning to a snow/rain mix and freezing rain but accumulations will be slightly higher with 2-5" of snow and up to 0.2" of ice. 

Prince William Sound: Snow/Rain mixed showers will continue in Valdez with 2.5-3.5" of rain by late tonight. Thompson Pass will continue to see heavy snow. 20-30" of snow is likely near the Pass. The Richardson Highway continues to be closed after a large avalanche crossed the highway Wednesday. Cordova will see heavy rain. 3-5" of rain is likely by early Friday. Winds will also be strong from the east with gusts to 45 mph.

Copper River Basin: Snow showers will continue in Glennallen and McCarthy today and tonight. High temperatures will hold in the upper 20s. All Copper Valley Schools remain closed due to poor road conditions and power outages. The Copper Valley Electric Association says power outages continue across the district as a large number of trees are across lines.

Stay tuned to the KTVA Weather Team for the latest weather conditions.

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