AVAREV The following message is transmitted at the request of the Eastern Sierra Avalanche Center. The Eastern Sierra Avalanche Center in Mammoth Lakes has issued a BACKCOUNTRY AVALANCHE WATCH for the following areas: NWS Las Vegas NV - CA-519 (Eastern Sierra in Inyo County) NWS Reno NV - CA-073 (Eastern Sierra in Mono County) * WHAT. The avalanche danger for the warning area will rise quickly as a strong winter storm impacts the forecast area beginning this afternoon. The danger is expected to rise to HIGH late tonight, and dangerous avalanche conditions are expected to continue into tomorrow. * WHERE. The eastern slopes of the Sierra Nevada mountain range between Virginia Lakes to the north and Bishop Creek to the south. * WHEN. In effect from Wed 07:00 PDT to Thu 07:00 PDT. * IMPACTS. Heavy snow combined with strong winds will create widespread areas of unstable snow as this storm intensifies overnight. * PRECAUTIONARY / PREPAREDNESS ACTIONS. Very dangerous avalanche conditions are expected to develop within the next 24 hours. Avalanches may run long distances, into mature forests, valley floors, or flat terrain. Consult http://www.esavalanche.org/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.