South Fork Grand River near Cash water level

Name: South Fork Grand River near Cash water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, South Fork Grand River, South Dakota, United States

Directions

Very low for late October

Water level

0.73ft Steady over the last 24 hours

Measured Oct 21, 2026, 01:15 AM MDT (53 min ago)

Flow: 10.0 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

At 0.73 ft, the South Fork Grand River near Cash is far below normal for late October.

The median for late October is 0.96 ft, based on 9 years of readings, so the river stage is 0.23 ft below typical. It is 11.27 ft below the flood stage of 12.00 ft. On the same day last year the reading was 1.51 ft, a difference of −0.78 ft.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 9 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 0.96 ft0.23 ft below the median for this date
Normal for this date: 0.75 ft – 2.02 ft8 years in 10 fall in this range (9 years of records)
Same day last year: 1.51 ft−0.78 ft
Lowest and highest in 30 days: 0.70 ft – 1.16 ft
Lowest and highest in 12 months: 0.58 ft – 2.57 ft
Highest on record: 12.78 ftMarch 18, 2009

What the stage means on the water

Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.

The National Weather Service puts flood stage for this gauge at 12.00 ft, still 11.27 ft away.

What happens at each level

16.00 ft: Major flood stage. Significant and widespread flooding along the South Fork of the Grand River from Divide Road to Shadehill Reservoir. Water may approach portions of Divide Road.
14.00 ft: Moderate flood stage. Widespread flooding of pasture lands along the South Fork of the Grand River. Water will approach the low steel on the Divide Road bridge.
12.00 ft: Minor flood stage. Minor flooding of pasture land along the South Fork of the Grand River from Divide Road to White Butte Road upstream of Shadehill Reservoir.
10.00 ft: Action stage. Low lying areas along the South Fork of the Grand River will be innundated.
0.73 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	12.78 ft	March 18, 2009
2	11.46 ft	June 18, 2014
3	11.11 ft	March 24, 2019
4	9.51 ft	March 17, 2011
5	9.45 ft	March 10, 1972
6	8.45 ft	March 25, 2018
7	8.40 ft	April 4, 1996
8	8.11 ft	May 13, 1995
9	8.08 ft	March 27, 1978
10	7.97 ft	July 27, 1993

Weather at the gauge

The forecast is not available right now.

Sunrise 07:16 AM Sunset 05:56 PM Daylight 10 hr, 40 min Waxing gibbous 75%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
North Fork Grand River near White ButteRiver gauge, North Fork Grand River	−0.03 ft	Below flood stage	−0.01 ft	17 mi
Shadehill ReservoirReservoir	2,265.17 ft	Low		22 mi
Grand River near Thunder HawkRiver gauge, Grand River	5.07 ft	Normal	+0.01 ft	35 mi
Cedar Creek near HaynesRiver gauge, Cedar Creek	4.02 ft	Normal	±0	36 mi
Moreau River near FaithRiver gauge, Moreau River	0.62 ft	Below flood stage	−0.01 ft	39 mi

Questions and answers

Is the South Fork Grand River near Cash higher than last year?

No, it is 0.78 ft lower than on the same day last year, when the reading was 1.51 ft.

What is flood stage for the South Fork Grand River near Cash?

The official flood stage is 12.00 ft. The level is currently 11.27 ft below it.

What is a normal level for the South Fork Grand River near Cash in late October?

The median for late October is 0.96 ft. In 8 years out of 10 the reading falls between 0.75 ft and 2.02 ft, based on 9 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of South Fork Grand River near Cash today?

On Oct 21, 2026, 01:15 AM MDT, the water level was 0.73 ft. Steady over the last 24 hours.

Is South Fork Grand River near Cash rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of South Fork Grand River near Cash normal?

Very low for late October. Compared with 9 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:06356500 (Agency page)
Coordinates: 45.64869, -102.64289 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	0.73 ft	2026-10-21 07:15	Provisional
Flow	10.0 cfs	2026-10-21 07:15	Provisional

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How to cite

U.S. Geological Survey: South Fork Grand River near Cash (usgs:06356500). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/south-dakota/south-fork-grand-river-near-cash

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer