How high is the Big Sioux River Near Florence,sd right now?

The Big Sioux River Near Florence,sd is currently flowing at 5 cubic feet per second with a gage height of 2.79 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Big Sioux River Near Florence,sd normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 35th percentile compared to the long-term historical record at this gauge.

Is the Big Sioux River Near Florence,sd at flood stage?

No — the gage height is 5.21 feet below the NWS flood-stage threshold of 8.0 feet.

What is the historical median flow for the Big Sioux River Near Florence,sd on June 11?

The long-term median discharge for this date is 9 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 1 to 134 cfs.

Where is the Big Sioux River Near Florence,sd stream gauge located?

The Big Sioux River Near Florence,sd stream gauge is operated by the USGS in Grant County, SD on the Big Sioux River. USGS site number 06479215 (coordinates 45.1808, -97.1862).

Big Sioux River Near Florence,sd

USGS Site No: 06479215 • Big Sioux River • Grant County, SD

Big Sioux River Near Florence,sd on the Big Sioux River is currently at 5 cfs (Normal — 35th percentile for this date) . Gage height: 2.79 ft.

Reading from 1 week ago

Downstream on Big Sioux River ↓

Big Sioux River Near Watertown,sd

CFS Discharge

2.79

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	1
25th	Low threshold	2
50th (Median)	Normal (median)	9	Today: 5 cfs
75th	High threshold	24
95th	Very High threshold	134

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	6	2.86
May 27, 2026	8	2.93
May 26, 2026	8	2.95
May 25, 2026	9	2.97
May 24, 2026	9	2.96
May 23, 2026	10	3.00
May 22, 2026	8	2.93
May 21, 2026	7	2.88
May 20, 2026	6	2.87
May 19, 2026	6	2.85
May 18, 2026	6	2.82
May 17, 2026	4	2.75
May 16, 2026	5	2.77
May 15, 2026	6	2.84
Apr 20, 2026	24	3.60
Apr 19, 2026	24	3.59
Apr 18, 2026	23	3.56
Apr 17, 2026	24	3.61
Apr 16, 2026	25	3.66
Apr 15, 2026	25	3.66
Apr 14, 2026	24	3.62
Apr 13, 2026	23	3.56
Apr 12, 2026	21	3.51
Apr 11, 2026	20	3.47
Apr 10, 2026	20	3.48
Apr 9, 2026	23	3.56
Apr 8, 2026	26	3.67
Apr 7, 2026	27	3.72
Apr 6, 2026	25	3.65
Apr 5, 2026	21	3.48

Station Information

USGS Site No: 06479215
State: SD
County: Grant County
Coordinates: 45.1808, -97.1862
Drainage Area: 68 mi²
Datum (ft): 1,792.0
HUC Code: 10170201

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 7.0 ft
Flood Stage: 8.0 ft
Moderate Flood: 8.5 ft
Major Flood: 9.0 ft

Currently 5.21 ft below flood stage.

Recent Extremes

Max discharge: 428 cfs

Jun 27, 2025
Min discharge: 1 cfs

Apr 22, 2025
Days at flood stage: 4

Computed from the local daily-values archive.

Nearby Gauges

Big Sioux River Near Watertown,sd
12.1 mi · 32 cfs

Normal
Big Sioux River at Watertown,sd
16.6 mi · 73 cfs

Normal
Willow Creek Near Watertown,sd
19.4 mi · 0 cfs

Unknown
Big Coulee Creek Near Peever,sd
23.9 mi · 11 cfs

Very High
Big Sioux River Below Watertown, SD
24.0 mi · 21 cfs

Low