USGS Streamgage 13022500
Snake River above Reservoir, near Alpine, WY
Snake River above Reservoir, near Alpine, WY is USGS streamgage 13022500 in Wyoming, monitoring river discharge in hydrologic subbasin 17040103. It drains a watershed of about 3,465 square miles. Discharge records at this site go back to 1937. Typical flow runs near 7,460.3 cfs in July and 2,852.7 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 3,465 sq mi
- Subbasin (HUC-8)
- 17040103
- Coordinates
- 43.19611, -110.88944
- USGS site number
- 13022500
- Records begin
- 1937-03-16 (89 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 89 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 1,145.2 | 1,491.3 | 1,942.9 | |
| February | 1,173.8 | 1,484.5 | 2,025.9 | |
| March | 1,200.6 | 1,585.8 | 2,696.5 | |
| April | 1,702 | 2,852.7 | 5,874 | |
| May | 4,505.8 | 8,362.3 | 14,522.3 | |
| June | 7,292 | 12,293.3 | 20,670 | |
| July | 4,591.6 | 7,460.3 | 12,793.2 | |
| August | 3,386.8 | 5,029 | 7,046.5 | |
| September | 2,574.7 | 3,940 | 5,587.7 | |
| October | 1,541 | 2,065.8 | 2,993.9 | |
| November | 1,360.3 | 1,741.7 | 2,290.7 | |
| December | 1,215.5 | 1,591.3 | 2,061.9 |
All values in cubic feet per second (cfs).