USGS Streamgage 13010065
Snake River Ab Jackson Lake at Flagg Ranch, WY
Snake River Ab Jackson Lake at Flagg Ranch, WY is USGS streamgage 13010065 in Wyoming, monitoring river discharge in hydrologic subbasin 17040101. It drains a watershed of about 486 square miles. Discharge records at this site go back to 1983. Typical flow runs near 674.5 cfs in July and 594.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 486 sq mi
- Gauge elevation
- 6,831 ft
- Subbasin (HUC-8)
- 17040101
- Coordinates
- 44.09889, -110.6675
- USGS site number
- 13010065
- Records begin
- 1983-10-01 (43 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 43 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 | 265.5 | 322.3 | 436.5 | |
| February | 267.9 | 316.4 | 433.9 | |
| March | 278.9 | 336.6 | 438.8 | |
| April | 378.2 | 594.3 | 1,225.3 | |
| May | 1,346.9 | 2,666.8 | 5,375.2 | |
| June | 941.8 | 2,655 | 5,662.7 | |
| July | 320.9 | 674.5 | 1,563.5 | |
| August | 206.5 | 359.3 | 607.5 | |
| September | 180.9 | 306.5 | 475.5 | |
| October | 205.7 | 330.2 | 475.3 | |
| November | 233.7 | 324.3 | 489.2 | |
| December | 252.5 | 325.9 | 457.5 |
All values in cubic feet per second (cfs).