Lake Levels of Lake Summit in 24 Hour Period

• As of Feb'25: added calculated cfs line based on lake level assuming fully spilling, horizotal red/blue/orange/red lines show the equivalent release percentages; traffic light indicates flow as a color.
• As of Feb'24: added discharge line, shows current release on second y-axis; traffic light indicates release level as a color.
• As of Nov'20: changes tend to be at 6am and 1pm. You can take a look at Lake Levels of Lake Summit over last 7 Days to figure out when levels tend to change.
• After 2 hours of a constant flow, you should be able to infer the release level. Given the 2-hour delay to the Narrows put-in, this is perfect for locals.
  Disclaimer: This will not work when/right after it rains though due to extra in-flow!
  The rain/extra flow adjusted references are now solid while the base lines are dashed as the adjustments seem to work reasonably well (still not perfect). The vectors should give you an idea of the generation flow (color). You may have to add some inches to the gauge based on the difference between solid and dashed lines of the same color due to extra flow from tributaries (both into the lake and below the lake).
• Please report gauge levels and the time you obtained them to me on Green(Narrows)Day@FB via PM so this tool can be improved.