Ruby River Above Reservoir Near Alder, Mount

USGS Site No: 06019500 • Ruby River • Madison County, MT

Ruby River Above Reservoir Near Alder, Mount on the Ruby River is currently at 210 cfs (Very High — 98th percentile for this date) . Gage height: 3.27 ft.

Reading from

Downstream on Ruby River ↓
Ruby River Below Reservoir Near Alder, Mount
210
CFS Discharge
3.27
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 Today's Flow
10th Very Low threshold 108
25th Low threshold 112
50th (Median) Normal (median) 127
75th High threshold 136
95th Very High threshold 162

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.

1.2k 589 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 217 —
May 27, 2026 217 —
May 26, 2026 202 —
May 25, 2026 170 —
May 24, 2026 144 —
May 23, 2026 133 —
May 22, 2026 146 —
May 21, 2026 154 —
May 20, 2026 157 —
May 19, 2026 166 —
May 18, 2026 208 —
May 17, 2026 238 —
May 16, 2026 258 —
May 15, 2026 303 —
Apr 20, 2026 158 —
Apr 19, 2026 158 —
Apr 18, 2026 152 —
Apr 17, 2026 156 —
Apr 16, 2026 172 —
Apr 15, 2026 167 —
Apr 14, 2026 183 —
Apr 13, 2026 220 —
Apr 12, 2026 230 —
Apr 11, 2026 201 —
Apr 10, 2026 178 —
Apr 9, 2026 171 —
Apr 8, 2026 167 —
Apr 7, 2026 163 —
Apr 6, 2026 159 —
Apr 5, 2026 153 —

Station Information

USGS Site No
06019500
State
MT
County
Madison County
Coordinates
45.1923, -112.1428
Drainage Area
534 mi²
Datum (ft)
5,400.0
HUC Code
10020003
View on USGS NWIS →

Recent Extremes

Max discharge
708 cfs
May 12, 2025
Min discharge
70 cfs
Jan 26, 2026

Computed from the local daily-values archive.

Nearby Gauges

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