USGS Streamgage 06885500
Black Vermillion River near Frankfort, KS
Black Vermillion River near Frankfort, KS is USGS streamgage 06885500 in Kansas, monitoring river discharge in hydrologic subbasin 10270205. It drains a watershed of about 410 square miles. Discharge records at this site go back to 1948. Typical flow runs near 29.3 cfs in July and 51.2 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
- Kansas
- Drainage area
- 410 sq mi
- Gauge elevation
- 1,139 ft
- Subbasin (HUC-8)
- 10270205
- Coordinates
- 39.68194, -96.44279
- USGS site number
- 06885500
- Records begin
- 1948-08-03 (78 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Black Vermillion River near Frankfort, KS. 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 |
|---|---|---|---|---|
| 16.5 | 18.6 | 20.6 | ||
| 15.6 | 18 | 20.4 | ||
| 15.3 | 18.5 | 27 | ||
| 14.7 | 19.3 | 66.2 | ||
| 14.4 | 20.2 | 93.4 | ||
| 14 | 20.9 | 84.5 | ||
| 14 | 21.4 | 106 | ||
| 13.6 | 21.7 | 108 | ||
| 12.9 | 21.2 | 119 | ||
| 12.8 | 20.2 | 61.7 | ||
| 12.6 | 19 | 42.3 | ||
| 12.4 | 18.6 | 41.3 | ||
| 12 | 18 | 37 | ||
| 11.6 | 17.1 | 31.4 |
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 73 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 | 7.1 | 24.1 | 99.8 | |
| February | 9.6 | 36.7 | 258 | |
| March | 11.4 | 43 | 409 | |
| April | 11.7 | 51.2 | 400.4 | |
| May | 11.3 | 67.6 | 848.8 | |
| June | 10.1 | 68.5 | 721.1 | |
| July | 3.3 | 29.3 | 323.9 | |
| August | 2.1 | 17.6 | 159.9 | |
| September | 2.1 | 11.5 | 231.4 | |
| October | 2.7 | 13.5 | 152.6 | |
| November | 5.8 | 22.3 | 114.5 | |
| December | 6.5 | 23.3 | 105.1 |
All values in cubic feet per second (cfs).
Common questions
- When does Black Vermillion River near Frankfort, KS normally run highest?
- June, on the long-term record. The median daily flow that month is about 68.5 cfs, against 11.5 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 Black Vermillion River near Frankfort, KS?
- It depends on the month. In January, half of days historically fall near 24.1 cfs, with the middle 80% of days between 7.1 and 99.8 cfs. The month-by-month table on this page gives the full range.
- How long has Black Vermillion River near Frankfort, KS been measured?
- Discharge records at USGS site 06885500 begin in 1948, about 78 years, covering roughly 9,193 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Black Vermillion River near Frankfort, KS?
- 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 Black Vermillion River near Frankfort, KS?
- The gauge sits at 39.68194, -96.44279, in Kansas, in hydrologic subbasin 10270205, at an elevation of about 1,139 feet, draining roughly 410 square miles.
- Can I use Black Vermillion River near Frankfort, KS 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.