Rivermatics

USGS Streamgage 06863420

Big C near Ellis, KS

Big C near Ellis, KS is USGS streamgage 06863420 in Kansas, monitoring river discharge in hydrologic subbasin 10260007. It sits on the Big C, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 338 square miles. Discharge records at this site go back to 2010. Typical flow runs near 0.7 cfs in July and 3.9 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
338 sq mi
Gauge elevation
2,159 ft
Subbasin (HUC-8)
10260007
Coordinates
38.92333, -99.65083
USGS site number
06863420
Records begin
2010-08-04 (16 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Big C near Ellis, 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.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
0 0 0.1
0 0 0.1
0 0 0.1
0 0 0.2
0 0 0.2
0 0 0.3
0 0 0.4
0 0 20.5
0 0 29.6
0 0.1 16
0 0.1 10.7
0 0.1 7.5
0 0.1 4.8
0 0.1 3.1

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 14 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 0 2.6 14.5
February 0.1 3.2 15
March 0.1 3.3 21.4
April 0 3.9 19.4
May 0 4.6 126
June 0 2.2 50.7
July 0 0.7 36.6
August 0 0.3 46.4
September 0 0.4 31
October 0 0.7 19.3
November 0 1.2 13.1
December 0 1.9 16.3

All values in cubic feet per second (cfs).

Common questions

When does Big C near Ellis, KS normally run highest?
May, on the long-term record. The median daily flow that month is about 4.6 cfs, against 0.3 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Big C near Ellis, KS?
It depends on the month. In January, half of days historically fall near 2.6 cfs, with the middle 80% of days between 0 and 14.5 cfs. The month-by-month table on this page gives the full range.
How long has Big C near Ellis, KS been measured?
Discharge records at USGS site 06863420 begin in 2010, about 16 years, covering roughly 5,222 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Big C near Ellis, 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 Big C near Ellis, KS?
The gauge sits at 38.92333, -99.65083, in Kansas, in hydrologic subbasin 10260007, at an elevation of about 2,159 feet, draining roughly 338 square miles.
Can I use Big C near Ellis, 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.

Upstream and downstream on the Big C

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Big C in full.

Other gauges in this subbasin