How high is the Tuolumne River near Hetch Hetchy CA right now?

The Tuolumne River near Hetch Hetchy CA is currently flowing at 366 cubic feet per second with a gage height of 4.97 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Tuolumne River near Hetch Hetchy CA normal for this time of year?

Current flow is classified as very high for October 28. Today's discharge is at the 107th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the Tuolumne River near Hetch Hetchy CA on October 28?

The long-term median discharge for this date is 53 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 34 to 169 cfs.

Where is the Tuolumne River near Hetch Hetchy CA stream gauge located?

The Tuolumne River near Hetch Hetchy CA stream gauge is operated by the USGS in Tuolumne County, CA on the Tuolumne River. USGS site number 11276500 (coordinates 37.9374, -119.7982).

Tuolumne River near Hetch Hetchy CA

USGS Site No: 11276500 • Tuolumne River • Tuolumne County, CA

Tuolumne River near Hetch Hetchy CA on the Tuolumne River is currently at 366 cfs (Very High — 107th percentile for this date) . Gage height: 4.97 ft.

Reading from 4 months ago

↑ Upstream on Tuolumne River

Tuolumne River at Grand Cyn Of Tuolumne above Hetch Hetchy

Downstream on Tuolumne River ↓

Tuolumne River above Early Intake near Mather CA

366

CFS Discharge

4.97

Gage Height (ft)

Very High

Flow Condition

N/A

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold
10th	Very Low threshold	34
25th	Low threshold	37
50th (Median)	Normal (median)	53
75th	High threshold	62
95th	Very High threshold	169

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	505	—
May 27, 2026	766	—
May 26, 2026	971	—
May 25, 2026	972	—
May 24, 2026	945	—
May 23, 2026	829	—
May 22, 2026	584	—
May 21, 2026	291	—
May 20, 2026	296	—
May 19, 2026	538	—
May 18, 2026	949	—
May 17, 2026	1,310	—
May 16, 2026	1,360	—
May 15, 2026	1,240	—
Apr 20, 2026	366	—
Apr 19, 2026	247	—
Apr 18, 2026	244	—
Apr 17, 2026	244	—
Apr 16, 2026	235	—
Apr 15, 2026	231	—
Apr 14, 2026	228	—
Apr 13, 2026	226	—
Apr 12, 2026	227	—
Apr 11, 2026	217	—
Apr 10, 2026	212	—
Apr 9, 2026	207	—
Apr 8, 2026	204	—
Apr 7, 2026	204	—
Apr 6, 2026	244	—
Apr 5, 2026	314	—

Station Information

USGS Site No: 11276500
State: CA
County: Tuolumne County
Coordinates: 37.9374, -119.7982
Drainage Area: 457 mi²
Datum (ft): 3,452.2
HUC Code: 18040009

View on USGS NWIS →

Recent Extremes

Max discharge: 4,140 cfs

May 10, 2025
Min discharge: 40 cfs

Dec 13, 2025

Computed from the local daily-values archive.

Nearby Gauges

Eleanor C near Hetch Hetchy CA
5.1 mi · 34 cfs

High
Cherry C below Valley Dam near Hetch Hetchy CA
6.8 mi · 7 cfs

Normal
Tuolumne River at Grand Cyn Of Tuolumne above Hetch Hetchy
7.7 mi · 819 cfs

High
Tuolumne River above Early Intake near Mather CA
9.1 mi · 418 cfs

Very High
Cherry C near Early Intake CA
9.4 mi · 52 cfs

High