Rivermatics

USGS Streamgage 06902000

Grand River near Sumner, MO

Grand River near Sumner, MO is USGS streamgage 06902000 in Missouri, monitoring river discharge in hydrologic subbasin 10280103. It sits on the Grand River, alongside 3 other gauges Rivermatics tracks on the same river. It drains a watershed of about 6,880 square miles. Discharge records at this site go back to 1909. Typical flow runs near 1,019.6 cfs in July and 2,519 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
Missouri
Drainage area
6,880 sq mi
Gauge elevation
644 ft
Subbasin (HUC-8)
10280103
Coordinates
39.64003, -93.27369
USGS site number
06902000
Records begin
1909-07-01 (117 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Grand River near Sumner, MO. 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
385 469 685
348 453 838
326 443 958
322 503 2,033
325 629 4,760
343 741 5,096
371 1,083 7,511
355 954 5,586
349 964 4,242
334 851 4,073
317 718 2,902
301 630 2,428
280 558 2,455
251 467 1,592

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 100 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 104.3 665.2 3,996.5
February 142.4 1,337.9 10,109.7
March 377.6 2,239.4 18,509.7
April 556.9 2,519 20,050
May 527.7 2,665.8 21,354.8
June 380.7 2,245.7 25,170
July 205.2 1,019.6 10,462.6
August 158.4 600.5 5,344.8
September 123 429.5 9,052
October 92 433.8 7,414.8
November 112 546.4 5,451.7
December 98.5 634.3 4,658.7

All values in cubic feet per second (cfs).

Common questions

When does Grand River near Sumner, MO normally run highest?
May, on the long-term record. The median daily flow that month is about 2,665.8 cfs, against 429.5 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Grand River near Sumner, MO?
It depends on the month. In January, half of days historically fall near 665.2 cfs, with the middle 80% of days between 104.3 and 3,996.5 cfs. The month-by-month table on this page gives the full range.
How long has Grand River near Sumner, MO been measured?
Discharge records at USGS site 06902000 begin in 1909, about 117 years, covering roughly 9,179 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Grand River near Sumner, MO?
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 Grand River near Sumner, MO?
The gauge sits at 39.64003, -93.27369, in Missouri, in hydrologic subbasin 10280103, at an elevation of about 644 feet, draining roughly 6,880 square miles.
Can I use Grand River near Sumner, MO 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 Grand River

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

Other gauges in this subbasin