Heavy Snow in City and Borough of Juneau, Alaska

Light snow began across Juneau at around 5pm on Sunday the 25th. Snow became heavier and wetter through the night with visibility falling to 1 mile at the airport around midnight. A social media report measured 7 inches of heavy and wet snow on Douglas by 6am Monday morning. Numerous other reports from social media had measurements of 6 to 8 inches between 6 to 10am ranging from out the road, to the Valley, and down to Thane and Snettisham. Rain began to mix in at the airport around 8am, then had transitioned to all rain in the noon hour. The RWIS sensor near Cohen Drive out the road saw the same timing of snow beginning and transition to rain as the airport. Rare to see consistent measurements and timing spanning the zone.

A weak front moved into the panhandle from the southwest bringing warm air advection. Deep cold air in place across the north set up a period of quickly accumulating but wet, overrunning snow followed by a transition to rain.