USGS Streamgage 13023000
Greys River above Reservoir, near Alpine, WY
Greys River above Reservoir, near Alpine, WY is USGS streamgage 13023000 in Wyoming, monitoring river discharge in hydrologic subbasin 17040103. It drains a watershed of about 448 square miles. Discharge records at this site go back to 1917. Typical flow runs near 786.1 cfs in July and 578.8 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 448 sq mi
- Subbasin (HUC-8)
- 17040103
- Coordinates
- 43.14306, -110.97694
- USGS site number
- 13023000
- Records begin
- 1917-07-06 (109 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 | 150.7 | 205.6 | 277.4 | |
| February | 151.9 | 198.5 | 252.7 | |
| March | 169.8 | 214.1 | 333.5 | |
| April | 297.2 | 578.8 | 1,167.5 | |
| May | 930.7 | 1,643.2 | 2,824.5 | |
| June | 967.1 | 1,805 | 3,196.3 | |
| July | 451.4 | 786.1 | 1,503.7 | |
| August | 308.6 | 451.4 | 681.2 | |
| September | 257.2 | 352.3 | 504.7 | |
| October | 228.3 | 306.3 | 422.7 | |
| November | 195 | 261.4 | 356.2 | |
| December | 162.8 | 224.8 | 302 |
All values in cubic feet per second (cfs).