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Mono County forecaster: warmer winters are producing more destructive 'rain‑on‑snow' avalanches that threaten roads and infrastructure
Summary
Avalanche forecaster Sue Burack told the board that warming temperatures and rain‑on‑snow events are creating more destructive avalanches that can reach county roads; she outlined weather‑station upgrades, mapping and a notification protocol and recommended targeted road closures when hazards threaten infrastructure.
Sue Burack, who leads Mono County’s avalanche forecasting work, briefed the board on changes in avalanche behavior and program improvements intended to protect county roads and residents.
Burack said the county now sees more mixed or rain‑on‑snow avalanches that can run farther and carry more destructive force than traditional dry‑snow slab events. “We’re seeing a different type of avalanche occur … much more rain on snow, and that create[s] a different type of avalanche that can run out farther,”…
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