How high is the Elm River at Westport,sd right now?

The Elm River at Westport,sd is currently flowing at 31 cubic feet per second with a gage height of 4.43 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Elm River at Westport,sd normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 68th percentile compared to the long-term historical record at this gauge.

Is the Elm River at Westport,sd at flood stage?

No — the gage height is 9.57 feet below the NWS flood-stage threshold of 14.0 feet.

What is the historical median flow for the Elm River at Westport,sd on June 11?

The long-term median discharge for this date is 15 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 2 to 269 cfs.

Where is the Elm River at Westport,sd stream gauge located?

The Elm River at Westport,sd stream gauge is operated by the USGS in Brown County, SD on the Elm River. USGS site number 06471500 (coordinates 45.6561, -98.4970).

Elm River at Westport,sd

USGS Site No: 06471500 • Elm River • Brown County, SD

Elm River at Westport,sd on the Elm River is currently at 31 cfs (Normal — 68th percentile for this date) . Gage height: 4.43 ft.

Reading from 1 week ago

CFS Discharge

4.43

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	2
25th	Low threshold	6
50th (Median)	Normal (median)	15
75th	High threshold	36	Today: 31 cfs
95th	Very High threshold	269

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	32	4.45
May 27, 2026	33	4.46
May 26, 2026	34	4.47
May 25, 2026	35	4.48
May 24, 2026	38	4.52
May 23, 2026	38	4.51
May 22, 2026	32	4.45
May 21, 2026	29	4.42
May 20, 2026	30	4.43
May 19, 2026	31	4.44
May 18, 2026	30	4.43
May 17, 2026	28	4.40
May 16, 2026	28	4.39
May 15, 2026	28	4.40
Apr 20, 2026	166	5.25
Apr 19, 2026	185	5.34
Apr 18, 2026	191	5.37
Apr 17, 2026	189	5.36
Apr 16, 2026	193	5.38
Apr 15, 2026	192	5.38
Apr 14, 2026	181	5.32
Apr 13, 2026	168	5.26
Apr 12, 2026	157	5.20
Apr 11, 2026	145	5.14
Apr 10, 2026	135	5.09
Apr 9, 2026	117	5.00
Apr 8, 2026	121	5.02
Apr 7, 2026	126	5.05
Apr 6, 2026	136	5.09
Apr 5, 2026	135	5.09

Station Information

USGS Site No: 06471500
State: SD
County: Brown County
Coordinates: 45.6561, -98.4970
Drainage Area: 1,505 mi²
Datum (ft): 1,310.0
HUC Code: 10160004

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 12.0 ft
Flood Stage: 14.0 ft
Moderate Flood: 16.0 ft
Major Flood: 19.0 ft

Currently 9.57 ft below flood stage.

Recent Extremes

Max discharge: 1,160 cfs

Aug 12, 2025
Min discharge: 11 cfs

Jul 20, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

James River at Columbia,sd
9.7 mi · 562 cfs

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Foot Creek Near Aberdeen, SD
10.2 mi · 112 cfs

High
Maple River at ND-SD State Line
19.7 mi · 21 cfs

Normal
James River at ND-SD State Line
24.8 mi · 533 cfs

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James River Near Stratford,sd
29.1 mi · 781 cfs

Normal