Rivermatics

2 USGS Streamgages · Mississippi River system

North Fork Grand River flows and levels

North Fork Grand River is gauged at 2 USGS streamgages in North Dakota and South Dakota, each tracked by Rivermatics. The mainstem runs about 148 miles (238 km) from headwaters to outlet. It drains into the Mississippi River system. Drainage area at the gauges ranges from 229 square miles at North Fork Grand River above Bowman-Haley Lake, ND up to 1,200 at North Fork Grand River near White Butte, SD. The gauged reach falls about 458 feet, from 2,756 feet down to 2,298. Rivermatics issues a daily machine-learned 14-day flow outlook at 1 of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
North Fork Grand River above Bowman-Haley Lake, ND ND 229 2,756 8.9 4.4 —
North Fork Grand River near White Butte, SD SD 1,200 2,298 33.5 10.4 14-day

Typical flow by month at North Fork Grand River near White Butte, SD

The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 60 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 2.2 15.1
February 0 4 50
March 2.3 24.5 423.8
April 4 33.5 340
May 1.6 27.2 196.4
June 0.4 17.5 144
July 0 10.4 59.6
August 0 1.3 34.4
September 0 0.5 20
October 0 3.1 22.8
November 0 5.2 15.7
December 0.2 3.5 12.5

All values in cubic feet per second (cfs).

Common questions

When does the North Fork Grand River run highest?
April, on the long-term record at North Fork Grand River near White Butte, SD — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 33.5 cfs that month, against 0.5 cfs in September, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
How many gauges are on the North Fork Grand River?
Rivermatics tracks 2 USGS streamgages on the North Fork Grand River, across North Dakota and South Dakota. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the North Fork Grand River?
Yes, at 1 of the 2 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily 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 each gauge's live screen.
What river system is the North Fork Grand River part of?
The North Fork Grand River drains into the Mississippi River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
Can I use North Fork Grand River 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.

Other rivers in the Mississippi River system

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