St Vrain Creek below Boulder Creek at Hwy 119 near Longmont
Is St Vrain Creek below Boulder Creek at Hwy 119 near Longmont flooding right now?
St Vrain Creek below Boulder Creek at Hwy 119 near Longmont measured 9.67 ft on 2026-09-11 01:00:00 UTC. That observation was 5.8 ft below its 15.5 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
9.67 ft
Streamflow
58 cfs
Minor flooding here begins at 15.5 ft, with major flooding at 18.5 ft. The highest crest on record was 14.56 ft on Sat, May 9, 2015.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 15 ft | 5.3 ft below |
| Minor flood | 15.5 ft | 5.8 ft below |
| Moderate flood | 17 ft | 7.3 ft below |
| Major flood | 18.5 ft | 8.8 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 14.56 ft | 2015-05-09 |
| 13.44 ft | 2017-05-18 |
| 12.97 ft | 2014-06-01 |
| 12.24 ft | 2019-07-02 |
| 12.17 ft | 2016-06-14 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| St. Vrain Creek below Longmont, CO | 0.4 mi | Weld County |
| Boulder Creek at Mouth near Longmont, CO | 1.6 mi | Weld County |
| Left Hand Creek at Hover Road near Longmont, CO | 6.7 mi | Boulder County |
| South Platte River at Fort Lupton, Co. | 10.5 mi | Weld County |
| Big Dry Creek at Mouth near Fort Lupton, CO | 11.2 mi | Weld County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.