Rivermatics

USGS Streamgage 06403700

Cheyenne River at Red Shirt, SD

Cheyenne River at Red Shirt, SD is USGS streamgage 06403700 in South Dakota, monitoring river discharge in hydrologic subbasin 10120109. It sits on the Cheyenne River, alongside 8 other gauges Rivermatics tracks on the same river. It drains a watershed of about 10,259 square miles. Discharge records at this site go back to 1998. Typical flow runs near 60.9 cfs in July and 88.5 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
South Dakota
Drainage area
10,259 sq mi
Gauge elevation
2,665 ft
Subbasin (HUC-8)
10120109
Coordinates
43.67242, -102.89167
USGS site number
06403700
Records begin
1998-09-12 (28 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Cheyenne River at Red Shirt, SD. 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
40.4 42 44.7
39.4 42.5 49
38.5 43 53.1
38.6 44.7 58.1
38.7 46.1 61
39.1 47.6 64.4
42 54.3 80.3
44.2 59.3 92.1
43.7 59.1 92.1
42.6 55.8 79.6
41.3 53.3 73.2
39.9 51.1 69
39.4 51.1 70.1
38.5 49.5 66.6

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 28 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 44.9 70.2 125.1
February 47.4 72.9 135.5
March 56.8 83.4 533.6
April 56.3 88.5 443.7
May 50.6 91 1,110.5
June 40 78.5 1,307.6
July 29.7 60.9 339.1
August 37.7 70.2 180.6
September 48.1 76.4 126.7
October 58.4 75.4 194.4
November 63.7 76.2 166.3
December 48.6 72.7 132

All values in cubic feet per second (cfs).

Common questions

When does Cheyenne River at Red Shirt, SD normally run highest?
May, on the long-term record. The median daily flow that month is about 91 cfs, against 60.9 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Cheyenne River at Red Shirt, SD?
It depends on the month. In January, half of days historically fall near 70.2 cfs, with the middle 80% of days between 44.9 and 125.1 cfs. The month-by-month table on this page gives the full range.
How long has Cheyenne River at Red Shirt, SD been measured?
Discharge records at USGS site 06403700 begin in 1998, about 28 years, covering roughly 9,115 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Cheyenne River at Red Shirt, SD?
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 Cheyenne River at Red Shirt, SD?
The gauge sits at 43.67242, -102.89167, in South Dakota, in hydrologic subbasin 10120109, at an elevation of about 2,665 feet, draining roughly 10,259 square miles.
Can I use Cheyenne River at Red Shirt, SD 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 Cheyenne River

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

Other gauges in this subbasin