How high is the Snake River above Jackson Lake at Flagg Ranch WY right now?

The Snake River above Jackson Lake at Flagg Ranch WY is currently flowing at 2,800 cubic feet per second with a gage height of 5.27 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Snake River above Jackson Lake at Flagg Ranch WY normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 49th percentile compared to the long-term historical record at this gauge.

Is the Snake River above Jackson Lake at Flagg Ranch WY at flood stage?

No — the gage height is 4.73 feet below the NWS flood-stage threshold of 10.0 feet.

What is the historical median flow for the Snake River above Jackson Lake at Flagg Ranch WY on June 11?

The long-term median discharge for this date is 2,840 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 1,080 to 6,770 cfs.

Where is the Snake River above Jackson Lake at Flagg Ranch WY stream gauge located?

The Snake River above Jackson Lake at Flagg Ranch WY stream gauge is operated by the USGS in Teton County, WY on the Snake River. USGS site number 13010065 (coordinates 44.0989, -110.6675).

Snake River above Jackson Lake at Flagg Ranch WY

USGS Site No: 13010065 • Snake River • Teton County, WY

Snake River above Jackson Lake at Flagg Ranch WY on the Snake River is currently at 2,800 cfs (Normal — 49th percentile for this date) . Gage height: 5.27 ft.

Reading from 1 week ago

↑ Upstream on Snake River

Little Snake River Near Slater, CO

Downstream on Snake River ↓

Little Snake River above Savery Creek, near Savery, WY

2,800

CFS Discharge

5.27

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	1,080
25th	Low threshold	1,840
50th (Median)	Normal (median)	2,840	Today: 2,800 cfs
75th	High threshold	4,290
95th	Very High threshold	6,770

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	3,240	—
May 27, 2026	3,000	—
May 26, 2026	2,610	—
May 25, 2026	2,190	—
May 24, 2026	1,800	—
May 23, 2026	1,530	—
May 22, 2026	1,560	—
May 21, 2026	1,760	—
May 20, 2026	1,670	—
May 19, 2026	1,770	—
May 18, 2026	2,070	—
May 17, 2026	2,480	—
May 16, 2026	3,110	—
May 15, 2026	3,640	—
Apr 20, 2026	944	—
Apr 19, 2026	895	—
Apr 18, 2026	929	—
Apr 17, 2026	1,010	—
Apr 16, 2026	1,150	—
Apr 15, 2026	1,150	—
Apr 14, 2026	1,240	—
Apr 13, 2026	1,470	—
Apr 12, 2026	1,690	—
Apr 11, 2026	1,670	—
Apr 10, 2026	1,420	—
Apr 9, 2026	1,240	—
Apr 8, 2026	1,160	—
Apr 7, 2026	964	—
Apr 6, 2026	833	—
Apr 5, 2026	787	—

Station Information

USGS Site No: 13010065
State: WY
County: Teton County
Coordinates: 44.0989, -110.6675
Drainage Area: 486 mi²
Datum (ft): 6,801.6
HUC Code: 17040101

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 9.0 ft
Flood Stage: 10.0 ft
Moderate Flood: 11.0 ft

Currently 4.73 ft below flood stage.

Recent Extremes

Max discharge: 5,550 cfs

May 30, 2025
Min discharge: 156 cfs

Aug 26, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Snake River Near Moran, WY
17.1 mi · 4,010 cfs

Normal
Pacific Creek at Moran, WY
18.7 mi · 838 cfs

Normal
Buffalo Fork above Lava Creek, near Moran, WY
21.3 mi · 2,180 cfs

Normal
Fall River above Yellowstone Canal near Squirrel ID
24.2 mi · 1,340 cfs

Low
Firehole River at Old Faithful, Ynp
26.1 mi · 126 cfs

Normal