St Vrain Creek below Boulder Creek at Highway 119 near Longmont
USGS Site No: 06730525 • St Vrain Creek • Weld County, CO
St Vrain Creek below Boulder Creek at Highway 119 near Longmont on the St Vrain Creek is currently at 719 cfs (Very High — 95th percentile for this date) . Gage height: 11.01 ft.
Reading from
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 | 74 | |
| 25th | Low threshold | 107 | |
| 50th (Median) | Normal (median) | 144 | |
| 75th | High threshold | 189 | |
| 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.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 484 | — |
| May 27, 2026 | 252 | — |
| May 26, 2026 | 137 | — |
| May 25, 2026 | 166 | — |
| May 24, 2026 | 206 | — |
| May 23, 2026 | 207 | — |
| May 22, 2026 | 274 | — |
| May 21, 2026 | 257 | — |
| May 20, 2026 | 267 | — |
| May 19, 2026 | 448 | — |
| May 18, 2026 | 340 | — |
| May 17, 2026 | 65 | — |
| May 16, 2026 | 62 | — |
| May 15, 2026 | 74 | — |
| Apr 20, 2026 | 47 | — |
| Apr 19, 2026 | 59 | — |
| Apr 18, 2026 | 63 | — |
| Apr 17, 2026 | 50 | — |
| Apr 16, 2026 | 41 | — |
| Apr 15, 2026 | 44 | — |
| Apr 14, 2026 | 40 | — |
| Apr 13, 2026 | 45 | — |
| Apr 12, 2026 | 45 | — |
| Apr 11, 2026 | 43 | — |
| Apr 10, 2026 | 36 | — |
| Apr 9, 2026 | 42 | — |
| Apr 7, 2026 | 40 | — |
| Apr 6, 2026 | 43 | — |
| Apr 5, 2026 | 44 | — |
| Apr 2, 2026 | 42 | — |
Station Information
- USGS Site No
- 06730525
- State
- CO
- County
- Weld County
- Coordinates
- 40.1605, -105.0079
- Drainage Area
- 872 mi²
- Datum (ft)
- 4,838.6
- HUC Code
- 101900050707
Flood Stage Thresholds
- Action Stage
- 15.0 ft
- Flood Stage
- 15.5 ft
- Moderate Flood
- 17.0 ft
- Major Flood
- 18.5 ft
Currently 4.49 ft below flood stage.
Recent Extremes
- Max discharge
-
1,020 cfsJun 14, 2025
- Min discharge
-
34 cfsSep 9, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Boulder Creek at Mouth Near Longmont, COHigh1.6 mi · 62 cfs
-
Left Hand Creek at Hover Road Near Longmont, COVery Low6.7 mi · 1 cfs
-
South Platte River at Fort Lupton, Co.Normal10.5 mi · 305 cfs
-
Big Dry Creek at Mouth Near Fort Lupton, CONormal11.2 mi · 30 cfs
-
Boulder Creek at North 75th St. Near Boulder, COVery High11.7 mi · 171 cfs