Dennis Mattinson / Sierra Atmospheric Forecaster September 22ndArea Forecast DiscussionOwens Valley / Mammoth Lakes / Mono County / Death ValleyDennis Mattinson / Sierra Atmospheric ForecasterSynopsis – MON SEP 22 2025Our overall weather pattern shows a cut off low off the SOCAL coast and high pressure over NORCAL / PACNW. So for the next few days warm conditions will exist from that high pressure. By mid week, that aforementioned cut off low will drift inland, over Southern NV. This will bring on chances of showers and t-storms (20 – 30%) particularly over higher terrain, with your temps running near average. -DMATTArea Wide Temperatures Today:Bishop: 86 / 48Big Pine: 85 / 55Independence: 85 / 60Lone Pine: 84 / 62Olancha: 88 / 65Mammoth Lakes: 66 / 44Death Valley: 105 / 82Related