LTBMU urges extreme caution during Lake Tahoe storm event

Release Date: Oct 22, 2021

Contact(s): Public Affairs, Lisa Herron 530-721-3898

Debris flows, flooding and rockfall are likely

[Image]: United States Forest Service Shield. SOUTH LAKE TAHOE, Calif., Oct. 22, 2021 – The National Weather Service has issued a Flood Watch beginning Saturday evening, and a Winter Storm Watch beginning Sunday evening for the Sacramento Region, including the Lake Tahoe Basin Management Unit (LTBMU). The amount of precipitation expected creates a risk of debris flows, flooding and rockfall especially in steep canyons within the Caldor Fire area. 

Movement of soil and rocks in response to an intense rain event like the predicted storm for this weekend can be destructive. Debris flows can occur suddenly and cause damage to structures or threaten the safety of people nearby. Flooding is expected along streams and rivers. Structures near waterways, bridges, culverts, and low water stream crossings are especially prone to flooding.

Debris flows, flooding and rockfall can occur without warning. If you are in the mountains, avoid steep slopes, and drainages especially in the Caldor Fire area, but also anywhere else affected by the storm. 

Many Burned Area Emergency Response (BAER) treatments have been completed in the Caldor Fire area over the last several weeks to mitigate erosion, protect infrastructure and increase safety. These treatments will have localized effects but cannot prevent a storm of this magnitude from having impacts. Be aware that both burned and unburned areas of the forest are at risk from the storm. 

Visitors are encouraged to avoid unnecessary travel and to monitor the National Weather Service website for updates on the storm at


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