A rare ice sheet has formed on Emerald Bay, California, on Lake Tahoe, the first time it has been seen in over 30 years — and a sign of the cold weather in the Sierra Nevada in a season normally linked to the spring thaw. For the first time since the early 1990s, Lake Tahoe’s Emerald Bay has completely frozen over. https://t.co/6E8nU3FTYJ — SFGATE (@SFGate) March 10, 2023 The New York Times reported: In March, the birds usually begin appearing in Emerald Bay, Calif., as the days get longer and the temperature creeps up, melting the snow that feeds the...