Rivermatics

USGS Streamgage 06349000

Heart River near Mandan, ND

Heart River near Mandan, ND is USGS streamgage 06349000 in North Dakota, monitoring river discharge in hydrologic subbasin 10130203. It sits on the Heart River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 3,320 square miles. Discharge records at this site go back to 1924. Typical flow runs near 97.2 cfs in July and 256.2 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
North Dakota
Drainage area
3,320 sq mi
Gauge elevation
1,662 ft
Subbasin (HUC-8)
10130203
Coordinates
46.83389, -100.97417
USGS site number
06349000
Records begin
1924-04-01 (102 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Heart River near Mandan, ND. 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
22.7 27.5 34.4
19.9 27.4 40
18.2 25.6 39.3
17.1 25 41
17.4 26.3 44.3
19 29.7 51.8
19.4 32.5 57.8
17.9 31.2 56
17.9 30.7 54.4
16.1 29 52.9
15 27.9 52.4
14.1 26.2 50.1
12.7 24.3 46.3
14 25.2 46.5

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 102 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 1.1 12.7 60.8
February 0.1 15.2 178.3
March 19.1 178.4 2,515.8
April 41.7 256.2 2,516.7
May 28.2 122.7 852.9
June 35 135.2 837.6
July 25.8 97.2 427.6
August 16.2 69.2 186.6
September 13.4 55.4 138
October 13.3 40.8 127.4
November 13.5 32.9 93.3
December 6.2 22 72.9

All values in cubic feet per second (cfs).

Common questions

When does Heart River near Mandan, ND normally run highest?
April, on the long-term record. The median daily flow that month is about 256.2 cfs, against 12.7 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 Heart River near Mandan, ND?
It depends on the month. In January, half of days historically fall near 12.7 cfs, with the middle 80% of days between 1.1 and 60.8 cfs. The month-by-month table on this page gives the full range.
How long has Heart River near Mandan, ND been measured?
Discharge records at USGS site 06349000 begin in 1924, about 102 years, covering roughly 9,132 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Heart River near Mandan, ND?
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 Heart River near Mandan, ND?
The gauge sits at 46.83389, -100.97417, in North Dakota, in hydrologic subbasin 10130203, at an elevation of about 1,662 feet, draining roughly 3,320 square miles.
Can I use Heart River near Mandan, ND 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 Heart River

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

Other gauges in this subbasin