How high is the Big Sioux River Near Hawarden, IA right now?

The Big Sioux River Near Hawarden, IA is currently flowing at 1,250 cubic feet per second with a gage height of 13.07 feet, based on the most recent USGS instantaneous reading.

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

Current flow is classified as normal for June 11. Today's discharge is at the 28th percentile compared to the long-term historical record at this gauge.

Is the Big Sioux River Near Hawarden, IA at flood stage?

No — the gage height is 7.43 feet below the NWS flood-stage threshold of 20.5 feet.

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

The long-term median discharge for this date is 3,220 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 688 to unavailable cfs.

Where is the Big Sioux River Near Hawarden, IA stream gauge located?

The Big Sioux River Near Hawarden, IA stream gauge is operated by the USGS in Union County, SD on the Big Sioux River. USGS site number 06483950 (coordinates 43.0514, -96.4894).

Big Sioux River Near Hawarden, IA

USGS Site No: 06483950 • Big Sioux River • Union County, SD

Big Sioux River Near Hawarden, IA on the Big Sioux River is currently at 1,250 cfs (Normal — 28th percentile for this date) . Gage height: 13.07 ft.

Reading from 1 week ago

↑ Upstream on Big Sioux River

Big Sioux River at North Cliff Ave at Sioux Falls,sd

Downstream on Big Sioux River ↓

Big Sioux River Near Jefferson, SD

1,250

CFS Discharge

13.07

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	688
25th	Low threshold	1,020
50th (Median)	Normal (median)	3,220	Today: 1,250 cfs
75th	High threshold	3,650
95th	Very High threshold	0

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	1,460	13.35
May 27, 2026	1,720	13.67
May 26, 2026	1,870	13.85
May 25, 2026	1,260	13.08
May 24, 2026	1,130	12.90
May 23, 2026	1,020	12.72
May 22, 2026	982	12.64
May 21, 2026	1,000	12.68
May 20, 2026	1,130	12.90
May 19, 2026	1,270	13.10
May 18, 2026	1,200	13.00
May 17, 2026	909	12.51
May 16, 2026	848	12.38
May 15, 2026	864	12.42
Apr 20, 2026	922	12.53
Apr 19, 2026	949	12.58
Apr 18, 2026	992	12.66
Apr 17, 2026	957	12.60
Apr 16, 2026	981	12.64
Apr 15, 2026	1,010	12.70
Apr 14, 2026	1,000	12.68
Apr 13, 2026	1,020	12.71
Apr 12, 2026	1,030	12.73
Apr 11, 2026	1,040	12.75
Apr 10, 2026	1,060	12.79
Apr 9, 2026	1,070	12.81
Apr 8, 2026	1,080	12.84
Apr 7, 2026	1,080	12.84
Apr 6, 2026	1,070	12.82
Apr 5, 2026	1,030	12.74

Station Information

USGS Site No: 06483950
State: SD
County: Union County
Coordinates: 43.0514, -96.4894
Drainage Area: 7,566 mi²
Datum (ft): 1,149.8
HUC Code: 101702032102

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 18.5 ft
Flood Stage: 20.5 ft
Moderate Flood: 24.0 ft
Major Flood: 30.0 ft

Currently 7.43 ft below flood stage.

Recent Extremes

Max discharge: 4,070 cfs

Jul 6, 2025
Min discharge: 582 cfs

Mar 3, 2026
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Rock River Near Rock Valley, IA
15.0 mi · 794 cfs

Normal
Big Sioux River at Akron, IA
15.2 mi · 1,430 cfs

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Beaver Creek at Canton SD
17.1 mi

Unknown
West Branch Floyd River Near Struble, IA
18.1 mi · 159 cfs

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Vermillion River Near Wakonda SD
24.3 mi

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