USGS Streamgage 12442500
Similkameen River near Nighthawk, WA
Similkameen River near Nighthawk, WA is USGS streamgage 12442500 in Washington, monitoring river discharge in hydrologic subbasin 17020007. It sits on the Similkameen River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 3,550 square miles. Discharge records at this site go back to 1928. Typical flow runs near 2,287.1 cfs in July and 1,806.7 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- Washington
- Drainage area
- 3,550 sq mi
- Gauge elevation
- 1,144 ft
- Subbasin (HUC-8)
- 17020007
- Coordinates
- 48.9846, -119.61841
- USGS site number
- 12442500
- Records begin
- 1928-10-01 (98 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Similkameen River near Nighthawk, WA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 239 | 253 | 265 | ||
| 230 | 246 | 262 | ||
| 225 | 244 | 265 | ||
| 223 | 244 | 267 | ||
| 220 | 243 | 269 | ||
| 217 | 241 | 269 | ||
| 214 | 238 | 267 | ||
| 210 | 235 | 266 | ||
| 205 | 231 | 263 | ||
| 202 | 229 | 261 | ||
| 200 | 227 | 261 | ||
| 197 | 225 | 263 | ||
| 193 | 222 | 262 | ||
| 191 | 221 | 262 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 98 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 | 307 | 577.8 | 1,182.9 | |
| February | 336 | 565.9 | 1,295.5 | |
| March | 413.2 | 615.2 | 1,404.8 | |
| April | 693.8 | 1,806.7 | 4,127 | |
| May | 3,498.7 | 7,148.4 | 13,647.4 | |
| June | 3,236.7 | 7,306.3 | 14,205 | |
| July | 1,101.9 | 2,287.1 | 5,572.3 | |
| August | 365.4 | 742.3 | 1,561.3 | |
| September | 274.1 | 492 | 983.1 | |
| October | 323.8 | 549.2 | 1,126.5 | |
| November | 373.3 | 724.5 | 1,836.3 | |
| December | 325.6 | 641.3 | 1,574.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Similkameen River near Nighthawk, WA normally run highest?
- June, on the long-term record. The median daily flow that month is about 7,306.3 cfs, against 492 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Similkameen River near Nighthawk, WA?
- It depends on the month. In January, half of days historically fall near 577.8 cfs, with the middle 80% of days between 307 and 1,182.9 cfs. The month-by-month table on this page gives the full range.
- How long has Similkameen River near Nighthawk, WA been measured?
- Discharge records at USGS site 12442500 begin in 1928, about 98 years, covering roughly 9,196 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Similkameen River near Nighthawk, WA?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. A companion model forecasts each day's water-temperature high and low. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Similkameen River near Nighthawk, WA?
- The gauge sits at 48.9846, -119.61841, in Washington, in hydrologic subbasin 17020007, at an elevation of about 1,144 feet, draining roughly 3,550 square miles.
- Can I use Similkameen River near Nighthawk, WA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Similkameen River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Similkameen River in full.
- Similkameen River near Nighthawk, WA this page
- Similkameen River near Oroville, WA 3,580 sq mi