Our highest temperature in the past 13 days has been 41F....the only day in the 40s. Four days have seen single digits.
If that's how it is at 700ft.... easy to imagine 1,500+ feet in NE VT/NNH/WME seeing full ice over, if they've been below freezing for so long and also seeing lows below zero a couple times. Hell most water around here is frozen solid but that's much smaller yard ponds and wetlands.
Crazy to think about... 2 weeks in November when average highs are in the 45-48F range, we have only hit 40F or higher once during that time...and I don't even think it was on an hourly report, it was a between hour high temp lol.