St Vrain Creek below Boulder Creek at Highway 119 near Longmont water level

Name: St Vrain Creek below Boulder Creek at Highway 119 near Longmont water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, St Vrain Creek, Colorado, United States

Directions

Below flood stage

Water level

9.70ft Steady over the last 24 hours

Measured Oct 21, 2026, 02:00 AM MDT (1 hour ago)

Flow: 42.3 cfs

History

7 days

Water level Minor flood stage

What this means

Water levels are unremarkable at St Vrain Creek below Boulder Creek at Highway 119 near Longmont, where the gauge shows 9.70 ft.

It is 5.80 ft below the flood stage of 15.50 ft.

It has barely moved over the past 24 hours. The 30-day range is 9.64 ft – 9.95 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 14.56 ftMay 9, 2015

Paddling and fishing conditions

Most paddlers and anglers will find the river in good shape at this stage.

For reference, flood stage is 15.50 ft.

What happens at each level

18.50 ft: Major, extensive flooding occurs as a wide expanse of the creek spreads out horizontally across the floodplain.
17.50 ft: Flooding affects large areas along the creek with numerous roads and structures impacted.
16.50 ft: There is significant flooding of agricultural land along the creek.
15.50 ft: Parks and agricultural fields and parks near the creek flood. Railroad tracks may be impacted.
15.00 ft: Water begins to overflow into the lowest areas adjacent to Saint Vrain Creek below its confluence with Boulder Creek.
9.70 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	14.56 ft	May 9, 2015
2	13.44 ft	May 18, 2017
3	12.97 ft	June 1, 2014
4	12.24 ft	July 2, 2019
5	12.17 ft	June 14, 2016
6	12.08 ft	June 7, 2021
7	11.31 ft	June 19, 2018
8	11.20 ft	June 6, 2020

Weather at the gauge

No rain in the last 3 days.

21 Wed 75° 45° – Wind 6 mph

22 Thu 75° 47° – Wind 10 mph

23 Fri 81° 57° – Wind 21 mph

24 Sat 64° 47° – Wind 15 mph

25 Sun 56° 43° 0.03 in, 36% Wind 14 mph

26 Mon 54° 40° 0.00 in Wind 9 mph

27 Tue 64° 34° – Wind 8 mph

Forecast: Open-Meteo

Sunrise 07:18 AM Sunset 06:13 PM Daylight 10 hr, 55 min Waxing gibbous 76%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Boulder Creek at Mouth near LongmontRiver gauge, Boulder Creek	1.7 cfs	Low	+0.9 cfs	1.6 mi
Left Hand Creek at Hover Road near LongmontRiver gauge, Left Hand Creek	0.8 cfs	Very low	+0.1 cfs	7 mi
South Platte River at Fort LuptonRiver gauge, South Platte River	3.30 ft	Below flood stage	±0	10 mi
Big Dry Creek at Mouth near Fort LuptonRiver gauge, Big Dry Creek	32.5 cfs	Normal	+0.4 cfs	11 mi
Boulder Creek at North 75th St. near BoulderRiver gauge, Boulder Creek	4.27 ft	Below flood stage	+0.21 ft	12 mi
Big Thompson River at LovelandRiver gauge, Big Thompson River	0.62 ft	Below flood stage	+0.02 ft	15 mi
Carter Lake ReservoirReservoir	5,708.47 ft	Normal		16 mi
Big Dry Creek at WestminsterRiver gauge, Big Dry Creek	0.9 cfs	Very low	+0.2 cfs	18 mi

Questions and answers

What is flood stage for St Vrain Creek below Boulder Creek at Highway 119 near Longmont?

The official flood stage is 15.50 ft. The level is currently 5.80 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of St Vrain Creek below Boulder Creek at Highway 119 near Longmont today?

On Oct 21, 2026, 02:00 AM MDT, the water level was 9.70 ft. Steady over the last 24 hours.

Is St Vrain Creek below Boulder Creek at Highway 119 near Longmont rising or falling?

Steady over the last 24 hours. Down 0.19 ft over the last 7 days.

Is the level of St Vrain Creek below Boulder Creek at Highway 119 near Longmont normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at St Vrain Creek below Boulder Creek at Highway 119 near Longmont?

The highest level on record is 14.56 ft on May 9, 2015.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:06730525 (Agency page)
Coordinates: 40.16047, -105.00794 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	9.70 ft	2026-10-21 08:00	Provisional
Flow	42.3 cfs	2026-10-21 08:00	Provisional

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How to cite

U.S. Geological Survey: St Vrain Creek below Boulder Creek at Highway 119 near Longmont (usgs:06730525). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/colorado/st-vrain-creek-below-boulder-creek-at-highway-119-near-longmont

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer