USGS Streamgage 13305000
Lemhi River near Lemhi, ID
Lemhi River near Lemhi, ID is USGS streamgage 13305000 in Idaho, monitoring river discharge in hydrologic subbasin 17060204. It drains a watershed of about 897 square miles. Discharge records at this site go back to 1938. Typical flow runs near 215.5 cfs in July and 251.7 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Idaho
- Drainage area
- 897 sq mi
- Subbasin (HUC-8)
- 17060204
- Coordinates
- 44.94, -113.63917
- USGS site number
- 13305000
- Records begin
- 1938-12-01 (88 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 86 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 | 164.9 | 216 | 284.9 | |
| February | 172.9 | 224.7 | 290.1 | |
| March | 185.9 | 250.2 | 329.7 | |
| April | 146.5 | 251.7 | 346 | |
| May | 122.1 | 260.2 | 556.6 | |
| June | 182.6 | 437.2 | 967.2 | |
| July | 97.5 | 215.5 | 477.1 | |
| August | 76.8 | 117.8 | 218.5 | |
| September | 81.5 | 131.8 | 241.5 | |
| October | 140.3 | 234.6 | 337.6 | |
| November | 195.9 | 262 | 345 | |
| December | 168.2 | 219.7 | 284.9 |
All values in cubic feet per second (cfs).