Rivermatics

USGS Streamgage 06423500

Cheyenne River near Wasta, SD

Cheyenne River near Wasta, SD is USGS streamgage 06423500 in South Dakota, monitoring river discharge in hydrologic subbasin 10120111. It sits on the Cheyenne River, alongside 8 other gauges Rivermatics tracks on the same river. It drains a watershed of about 12,679 square miles. Discharge records at this site go back to 1914. Typical flow runs near 152.5 cfs in July and 251.3 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
South Dakota
Drainage area
12,679 sq mi
Gauge elevation
2,265 ft
Subbasin (HUC-8)
10120111
Coordinates
44.08111, -102.40083
USGS site number
06423500
Records begin
1914-10-01 (112 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Cheyenne River near Wasta, 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
35.5 42.2 52
33.2 42.9 59.3
31.6 42.4 62.6
31.3 44.2 74.1
31.9 46.9 79.5
31.8 48.4 87.1
36 63.6 160
45.6 98.6 291
43.5 95.7 289
43.9 85.7 194
40.8 73.7 151
39.1 67.5 128
37.7 63.5 116
35.6 60.6 114

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 63 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 40.9 106.1 270.9
February 57.5 137.9 381.9
March 97.3 227.8 1,028.8
April 91 251.3 1,244.9
May 69.2 268.9 2,373.5
June 53.5 258.8 2,724.3
July 34.3 152.5 898.2
August 43.6 110.2 509.2
September 54.2 109 330.6
October 71.7 124.4 397.1
November 84 136.9 312.6
December 56.4 110.5 272

All values in cubic feet per second (cfs).

Common questions

When does Cheyenne River near Wasta, SD normally run highest?
May, on the long-term record. The median daily flow that month is about 268.9 cfs, against 106.1 cfs in January, 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 near Wasta, SD?
It depends on the month. In January, half of days historically fall near 106.1 cfs, with the middle 80% of days between 40.9 and 270.9 cfs. The month-by-month table on this page gives the full range.
How long has Cheyenne River near Wasta, SD been measured?
Discharge records at USGS site 06423500 begin in 1914, about 112 years, covering roughly 9,073 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 near Wasta, 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. 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 near Wasta, SD?
The gauge sits at 44.08111, -102.40083, in South Dakota, in hydrologic subbasin 10120111, at an elevation of about 2,265 feet, draining roughly 12,679 square miles.
Can I use Cheyenne River near Wasta, 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