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Showing posts from April, 2022

Transition from rain to snow overnight

Rain showers all day. Falling temperatures all day. Mud season at peak, with frost heaves at all the usual places on Pinnacle Rd. Yamaska river in Cowansville was above it's normal level, but well below its banks, with Sutton River similar. Transitioning to snow around 5:30 PM; 1.5 mm of rain collected in small gauge at this time and removed to let larger gauge capture snow. Large flakes of wet snow observed at this time with temperature +1.5 C. Was outside at 10:30pm for mixed bag of frozen precipitation with brisk winds blowing small (~1mm), stinging ice/snow pellets; transition back to snow in about 10 minutes. Brisk winds and blowing snow through night with overnight low temperature of -3.5C.  Gauge catch: Temperature +1.5C at 9:30 observation time. Overnight gauge catch (large gauge) of 4.1mm consisting of roughly 2mm (+- 0.5 mm, measured) fused rain topped by powdered snow.  Snowboard: about 20 cm off ground next to gauge has 1.7cm (+-0.2cm) of dry, powdery snow consiste...