- Lake TravisHighland Lakes · Texas
- Lake BuchananHighland Lakes · Texas
- Canyon LakeGuadalupe River · Texas
- Lake TexomaRed River · Texas / Oklahoma
- Lake LanierChattahoochee River · Georgia
- Allatoona LakeEtowah River · Georgia
- Hartwell LakeSavannah River · Georgia / South Carolina
- Lake MurraySaluda River · South Carolina
- Jordanelle ReservoirProvo River · Utah
Inflow forecast
modeledNOAA’s National Water Model, short-range run issued Nov 14, 2 PM MST, for the 3 gauged tributary reaches feeding Lake Powell. The model includes rain that has already fallen plus the near-term rain forecast.
Gauged inflow now
9,380
cfs · measured
Peak next 17h
10,976
cfs · ~Sun 8 AM MST · modeled
Projected volume
14,220
acre-feet over 17h · modeled
Net lake effect
+0.05 ft
after 7,900 cfs out · inferred
Projected flow by tributary reach
| Hour | Total (cfs) | Green (cfs) | Colorado (cfs) | San Juan (cfs) |
|---|---|---|---|---|
| Sat 4 PM | 8,871 | 4,186 | 3,311 | 1,374 |
| Sat 5 PM | 8,983 | 4,229 | 3,313 | 1,440 |
| Sat 6 PM | 9,126 | 4,277 | 3,318 | 1,531 |
| Sat 7 PM | 9,299 | 4,324 | 3,326 | 1,649 |
| Sat 8 PM | 9,496 | 4,365 | 3,335 | 1,796 |
| Sat 9 PM | 9,706 | 4,396 | 3,343 | 1,966 |
| Sat 10 PM | 9,918 | 4,418 | 3,350 | 2,151 |
| Sat 11 PM | 10,120 | 4,430 | 3,352 | 2,338 |
| Sun 12 AM | 10,305 | 4,437 | 3,352 | 2,517 |
| Sun 1 AM | 10,465 | 4,438 | 3,348 | 2,679 |
| Sun 2 AM | 10,598 | 4,437 | 3,342 | 2,819 |
| Sun 3 AM | 10,705 | 4,433 | 3,335 | 2,936 |
| Sun 4 AM | 10,789 | 4,427 | 3,328 | 3,034 |
| Sun 5 AM | 10,855 | 4,420 | 3,322 | 3,113 |
| Sun 6 AM | 10,906 | 4,410 | 3,315 | 3,180 |
| Sun 7 AM | 10,945 | 4,400 | 3,309 | 3,237 |
| Sun 8 AM | 10,976 | 4,388 | 3,303 | 3,285 |
Dashed lines are forecast. Values are at the gauges; water takes hours to a couple of days to get from there to the lake. National Water Model via NOAA/NWS · public domain.
The “net lake effect” is the forecast inflow volume minus the water leaving the lake now (7,900 cfs, Colorado at Lees Ferry, right now), held steady over the forecast period and spread over the lake’s estimated current surface area (before releases it would be +0.21 ft). It ignores travel time, channel losses and any change the dam operators make, so it gives a sense of scale, not a prediction. During floods, watch the main page instead.