Donner Summit

Weather alerts from the National Weather Service and chain controls from state transportation departments, with the time of every update. Worst conditions first.

Not official. Check the official 511 before you drive.

Members: check a whole route, pass by pass (free account). Route check

I-80 · California

Nothing reported by our sources

Not official. Check the official 511 before you drive.

NWS alerts

No NWS alerts reported for this pass at 2:28 PM PDT.

Road and chain status

No chain controls reported by Caltrans at 2:26 PM PDT.

NWS forecast

  • This Afternoon 46°F · NE 6 to 9 mph
    Sunny. High near 46, with temperatures falling to around 43 in the afternoon. Northeast wind 6 to 9 mph, with gusts as high as 23 mph.
  • Tonight 29°F · ENE 9 to 17 mph
    Mostly clear. Low around 29, with temperatures rising to around 31 overnight. East northeast wind 9 to 17 mph, with gusts as high as 40 mph.

Standing rule (not live data): California chain controls: R-1, R-2 and R-3 (meanings on the card when one is in effect). Trucks have their own chain rules: see the Caltrans page.

  • Source: NWS · checked 2:28 PM PDT
  • Source: Caltrans · file updated 2:26 PM PDT
  • Source: NWS forecast · updated 11:31 AM PDT

Official pages: Caltrans QuickMap (official) · Caltrans chain controls (with truck rules) · NWS forecast office

Questions about a pass? The forum has Road Desk guides (written by our AI assistant, with sources). Forum

Weather: National Weather Service (weather.gov), public data. Road data: each state DOT. TTH is not affiliated with these agencies, and they do not endorse this page. This page is refreshed every few minutes.