USGS Streamgage 09400350
Little Colorado River near Winslow, AZ
Little Colorado River near Winslow, AZ is USGS streamgage 09400350 in Arizona, monitoring river discharge in hydrologic subbasin 15020008. It sits on the Little Colorado River, alongside 8 other gauges Rivermatics tracks on the same river. It drains a watershed of about 16,192 square miles. Discharge records at this site go back to 2001. Typical flow runs near 21.2 cfs in July and 52 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Arizona
- Drainage area
- 16,192 sq mi
- Gauge elevation
- 4,836 ft
- Subbasin (HUC-8)
- 15020008
- Coordinates
- 35.00673, -110.65428
- USGS site number
- 09400350
- Records begin
- 2001-12-13 (25 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Little Colorado River near Winslow, AZ. 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 |
|---|---|---|---|---|
| 498 | 1,607 | 5,011 | ||
| 506 | 3,013 | 15,405 | ||
| 270 | 1,799 | 10,765 | ||
| 133 | 755 | 3,655 | ||
| 70 | 398 | 1,857 | ||
| 30.2 | 187 | 872 | ||
| 14.7 | 145 | 938 | ||
| 7 | 103 | 1,141 | ||
| 5 | 69 | 675 | ||
| 4.1 | 48.6 | 394 | ||
| 4.2 | 43.8 | 382 | ||
| 6.4 | 59.1 | 607 | ||
| 5.4 | 66.1 | 638 | ||
| 2.7 | 36.5 | 577 |
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 25 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 | 6.2 | 11.5 | 591.9 | |
| February | 5.8 | 22.5 | 1,017.1 | |
| March | 7.1 | 234.7 | 1,472.6 | |
| April | 6.1 | 52 | 1,020.1 | |
| May | 4 | 6.8 | 78.4 | |
| June | 2.9 | 4.3 | 18 | |
| July | 3.2 | 21.2 | 769.8 | |
| August | 2.8 | 56.3 | 1,088.4 | |
| September | 3 | 11.8 | 653.3 | |
| October | 4.1 | 7.8 | 395.2 | |
| November | 5.5 | 7.9 | 101.4 | |
| December | 6.1 | 9.6 | 232.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Colorado River near Winslow, AZ normally run highest?
- March, on the long-term record. The median daily flow that month is about 234.7 cfs, against 4.3 cfs in June, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Little Colorado River near Winslow, AZ?
- It depends on the month. In January, half of days historically fall near 11.5 cfs, with the middle 80% of days between 6.2 and 591.9 cfs. The month-by-month table on this page gives the full range.
- How long has Little Colorado River near Winslow, AZ been measured?
- Discharge records at USGS site 09400350 begin in 2001, about 25 years, covering roughly 8,938 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Little Colorado River near Winslow, AZ?
- 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. 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 Little Colorado River near Winslow, AZ?
- The gauge sits at 35.00673, -110.65428, in Arizona, in hydrologic subbasin 15020008, at an elevation of about 4,836 feet, draining roughly 16,192 square miles.
- Can I use Little Colorado River near Winslow, AZ 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 Little Colorado River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Little Colorado River in full.
- Little Colorado River at Greer, AZ 29 sq mi
- Little Colorado River above Lyman Lake near St. Johns, AZ 706 sq mi
- Little Colorado River below Salado Springs, AZ 845 sq mi
- Little Colorado River at Woodruff, AZ 8,072 sq mi
- Little Colorado River at Holbrook, AZ 11,462 sq mi
- Little Colorado River near Joseph City, AZ 12,384 sq mi
- Little Colorado River near Winslow, AZ this page
- Little Colorado River near Cameron, AZ 26,459 sq mi
- Little Colorado River above Mouth near Desert View, AZ 26,972 sq mi