USGS Streamgage 12175500
Thunder Creek near Newhalem, WA
Thunder Creek near Newhalem, WA is USGS streamgage 12175500 in Washington, monitoring river discharge in hydrologic subbasin 17110005. It drains a watershed of about 105 square miles. Discharge records at this site go back to 1930. Typical flow runs near 1,242.9 cfs in July and 318.5 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Washington
- Drainage area
- 105 sq mi
- Gauge elevation
- 1,230 ft
- Subbasin (HUC-8)
- 17110005
- Coordinates
- 48.67263, -121.0729
- USGS site number
- 12175500
- Records begin
- 1930-10-01 (96 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 96 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 | 105.8 | 187.5 | 498.3 | |
| February | 97.2 | 165.9 | 440.5 | |
| March | 108.8 | 179.3 | 393.7 | |
| April | 179.5 | 318.5 | 681.3 | |
| May | 429.9 | 783.1 | 1,552.6 | |
| June | 725.2 | 1,213 | 1,999 | |
| July | 847.5 | 1,242.9 | 1,866.1 | |
| August | 652.3 | 934.5 | 1,372.9 | |
| September | 341.6 | 569.6 | 936.5 | |
| October | 179.8 | 335.6 | 818.1 | |
| November | 136 | 282.2 | 853.5 | |
| December | 124.5 | 225.2 | 585.2 |
All values in cubic feet per second (cfs).
Other gauges in this subbasin
- Skagit River at Newhalem, WA
- Newhalem Creek near Newhalem, WA
- Newhalem Creek at Newhalem, WA
- Skagit River below Babcock Creek near Newhalem, WA
- Skagit River below Damnation Creek near Marblemount, WA
- Skagit River above Alma Creek near Marblemount, WA
- Bacon Creek below Oakes Creek near Marblemount, WA
- Skagit River above Diobsud Creek near Marblemount, WA