How high is the Atchafalaya River at Simmesport, LA right now?

The Atchafalaya River at Simmesport, LA is currently flowing at 198,000 cubic feet per second with a gage height of 15.85 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Atchafalaya River at Simmesport, LA normal for this time of year?

Current flow is classified as low for June 11. Today's discharge is at the 18th percentile compared to the long-term historical record at this gauge.

Is the Atchafalaya River at Simmesport, LA at flood stage?

No — the gage height is 24.15 feet below the NWS flood-stage threshold of 40.0 feet.

What is the historical median flow for the Atchafalaya River at Simmesport, LA on June 11?

The long-term median discharge for this date is 318,000 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 144,000 to unavailable cfs.

Where is the Atchafalaya River at Simmesport, LA stream gauge located?

The Atchafalaya River at Simmesport, LA stream gauge is operated by the USGS in Avoyelles Parish, LA on the Atchafalaya River. USGS site number 07381490 (coordinates 30.9825, -91.7983).

Atchafalaya River at Simmesport, LA

USGS Site No: 07381490 • Atchafalaya River • Avoyelles Parish, LA

Atchafalaya River at Simmesport, LA on the Atchafalaya River is currently at 198,000 cfs (Low — 18th percentile for this date) . Gage height: 15.85 ft.

Reading from 1 week ago

198,000

CFS Discharge

15.85

Gage Height (ft)

Low

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	144,000
25th	Low threshold	247,000	Today: 198,000 cfs
50th (Median)	Normal (median)	318,000
75th	High threshold	448,000
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 26, 2026	173,000	13.44
May 25, 2026	180,000	14.20
May 24, 2026	183,000	14.51
May 19, 2026	195,000	15.59
May 18, 2026	209,000	16.77
May 17, 2026	215,000	17.36
May 16, 2026	225,000	18.18
May 15, 2026	235,000	19.05
Apr 20, 2026	206,000	16.56
Apr 17, 2026	210,000	16.94
Apr 16, 2026	212,000	17.06
Apr 15, 2026	210,000	16.93
Apr 14, 2026	196,000	15.63
Apr 13, 2026	187,000	14.87
Apr 12, 2026	179,000	14.12
Apr 11, 2026	173,000	13.46
Apr 10, 2026	170,000	13.16
Apr 9, 2026	168,000	12.84
Apr 8, 2026	167,000	12.72
Apr 7, 2026	160,000	11.96
Apr 6, 2026	154,000	11.31
Apr 3, 2026	172,000	13.38
Apr 2, 2026	182,000	14.43
Apr 1, 2026	196,000	15.71
Mar 31, 2026	215,000	17.32
Mar 30, 2026	229,000	18.52
Mar 29, 2026	240,000	19.46
Mar 28, 2026	250,000	20.29
Mar 27, 2026	257,000	20.86
Mar 26, 2026	266,000	21.60

Station Information

USGS Site No: 07381490
State: LA
County: Avoyelles Parish
Coordinates: 30.9825, -91.7983
Drainage Area: 87,570 mi²
HUC Code: 08080101

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 35.0 ft
Flood Stage: 40.0 ft
Moderate Flood: 44.0 ft
Major Flood: 50.0 ft

Currently 24.15 ft below flood stage.

Recent Extremes

Max discharge: 521,000 cfs

May 1, 2025
Min discharge: 59,300 cfs

Oct 30, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Old River Outflow Channel Below Hydropower Channel
10.6 mi · 0 cfs

Unknown
Bayou Des Glaises Diversion Ch. at Moreauville, LA
11.5 mi · 0 cfs

Unknown
Red River 6.5 Miles Below Black River, LA
16.6 mi · 43,700 cfs

Normal
Bayou Courtableau at Washington, LA
29.4 mi · 1,930 cfs

High
Atchafalaya River @ Krotz Springs, LA
30.2 mi · 0 cfs

Unknown