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Browns Valley Creek

Napa County flood-warning gage on Browns Valley Creek, in the Napa River watershed.

Location: 38.30360, -122.33120

Browns Valley Creek is 0.00 ft deep at the gage.

Browns Valley Creek at McCormick Ln

Water level

0.00 ft

Steady

Reading

Last reading

This water year at a glance

Browns Valley Creek at McCormick Ln

Lowest water level

0.00 ft

On Oct 23, 2026

Oct 1–27

The lowest daily average water level of the window. It is depth at the sensor, not a surveyed river stage, so it compares with this gage's other days only.

Biggest 24-hour rise

0.00 ft

On Oct 20, 2026, peaking Oct 20, 2026, 4:53 PM PDT

Oct 1–27

The largest rise in water level over any 24 hours in the window — a storm-response indicator.

Data completeness

0%

0 of 26 days

Oct 1–27

Days with enough readings to count as complete, out of the days elapsed in the window so far.

Is the water healthy for steelhead?

Dissolved oxygen: data not available.

pH: data not available.

Turbidity: data not available.

Daily highs and lows

Over the last 90 days, water level swung an average of 0.00 ft between night and day.

Show the data as a table
Daily low, average, high, and swing at Browns Valley Creek at McCormick Ln — the last 14 days of the selected measurement data.
Date Water level Data
Min Mean Max Swing
Feb 26, 2026 0.02 ft 0.02 ft 0.02 ft 0.00 ft Incomplete day: 2 of 5 readings
Apr 10, 2026 0.04 ft 0.42 ft 0.92 ft 0.88 ft Incomplete day: 26 of 102 readings
Apr 11, 2026 0.02 ft 0.49 ft 1.34 ft 1.32 ft Incomplete day: 24 of 720 readings
Apr 12, 2026 0.01 ft 0.12 ft 0.28 ft 0.27 ft Incomplete day: 5 of 180 readings
Apr 20, 2026 0.06 ft 0.27 ft 0.54 ft 0.48 ft Incomplete day: 14 of 102 readings
Apr 21, 2026 0.02 ft 0.33 ft 0.64 ft 0.62 ft Incomplete day: 13 of 48 readings
Apr 22, 2026 0.06 ft 0.37 ft 0.77 ft 0.71 ft Incomplete day: 11 of 144 readings
May 4, 2026 0.07 ft 0.15 ft 0.28 ft 0.21 ft Incomplete day: 4 of 120 readings
Oct 20, 2026 0.34 ft 0.34 ft 0.34 ft 0.00 ft Incomplete day: 1 of 96 readings
Oct 23, 2026 0.00 ft 0.00 ft 0.00 ft 0.00 ft
Oct 24, 2026 0.00 ft 0.00 ft 0.00 ft 0.00 ft
Oct 25, 2026 0.00 ft 0.00 ft 0.00 ft 0.00 ft
Oct 26, 2026 0.00 ft 0.00 ft 0.00 ft 0.00 ft
Oct 27, 2026 0.00 ft 0.00 ft 0.00 ft 0.00 ft So far today: 2 of 2 readings so far

Water level and temperature over time

Over the last 7 days, water level ranged from 0.00 ft to 0.34 ft.

Raw readings are in Recent readings and downloads.

Show the data as a table
Daily minimum, average, and maximum for the last 7 days at Browns Valley Creek at McCormick Ln.
Date Water level
Min Mean Max
May 4, 2026 0.07 ft 0.15 ft 0.28 ft
Oct 20, 2026 0.34 ft 0.34 ft 0.34 ft
Oct 23, 2026 0.00 ft 0.00 ft 0.00 ft
Oct 24, 2026 0.00 ft 0.00 ft 0.00 ft
Oct 25, 2026 0.00 ft 0.00 ft 0.00 ft
Oct 26, 2026 0.00 ft 0.00 ft 0.00 ft
Oct 27, 2026 (so far today) 0.00 ft 0.00 ft 0.00 ft

Every day at a glance

Browns Valley Creek at McCormick Ln

There are only 4 complete days of data in the last 12 months, and a calendar needs 7 — so the summaries and the tables below stand in for it.

Show the monthly summaries for water year 2027
At Browns Valley Creek at McCormick Ln, month by month in water year 2027: how many days fell in each steelhead band, and the month's averages. Means use days that ended; a day without enough readings is in no band.
Month Mean water level (ft)
Oct 2026 0.07 ft
Show every day of water year 2027 as a table
At Browns Valley Creek at McCormick Ln, every day of water year 2027, the calendar's own rows: the 7-day average daily high the bands are based on, the band in words, and — labeled separately — that day's maximum temperature and average water level.
Date Daily mean water level (ft)
Oct 20, 2026 0.34 ft
Oct 23, 2026 0.00 ft
Oct 24, 2026 0.00 ft
Oct 25, 2026 0.00 ft
Oct 26, 2026 0.00 ft
Oct 27, 2026 (so far today) 0.00 ft

The calendar colors by daily average water level

  • Daily water level; darker blue is deeper. Levels are continuous, so they carry no band.

The calendar's own days, in words: the tables above are the same data. For the raw readings, see Recent readings and downloads.

This year compared with past years

Water level on Oct 27, 2026 was 0.00 ft. No earlier water year has a reading on Oct 27, so this day cannot be compared yet.

Show the data as a table
Daily average water level at Browns Valley Creek at McCormick Ln on the same calendar day in every water year of the record: WY2027 (this year), WY2026, WY2025. A dash is a day with no reading in that year, never a zero.
Day of water year WY2027 (this year) WY2026 WY2025
Oct 13 — 0.24 ft —
Oct 20 0.34 ft — —
Oct 23 0.00 ft — —
Oct 24 0.00 ft — —
Oct 25 0.00 ft — —
Oct 26 0.00 ft — —
Oct 27 0.00 ft — —
Nov 5 — 0.61 ft —
Nov 13 — 0.55 ft —
Nov 17 — 0.62 ft —
Dec 19 — 0.19 ft —
Dec 20 — 0.08 ft —
Dec 21 — 0.43 ft —
Dec 22 — 0.51 ft —
Dec 24 — 0.77 ft —
Dec 25 — 1.14 ft —
Dec 26 — 0.20 ft —
Dec 27 — 0.07 ft —
Dec 31 — 0.55 ft —
Jan 1 — 0.31 ft —
Jan 2 — 0.51 ft —
Jan 3 — 1.63 ft —
Jan 4 — 0.99 ft —
Jan 5 — 1.00 ft —
Jan 6 — 0.44 ft —
Jan 7 — 0.10 ft —
Feb 4 — — 5.10 ft
Feb 5 — — 0.85 ft
Feb 6 — — 1.09 ft
Feb 7 — — 0.70 ft
Feb 8 — — 0.25 ft
Feb 9 — — 0.11 ft
Feb 10 — — 0.07 ft
Feb 11 — 0.64 ft 0.02 ft
Feb 12 — — 0.26 ft
Feb 13 — — 2.35 ft
Feb 14 — — 0.70 ft
Feb 15 — 0.37 ft 0.31 ft
Feb 16 — 1.90 ft 0.14 ft
Feb 17 — 1.14 ft 0.08 ft
Feb 18 — 0.32 ft 0.05 ft
Feb 19 — 1.06 ft 0.05 ft
Feb 20 — 0.20 ft 0.00 ft
Feb 21 — 0.04 ft 0.00 ft
Feb 22 — — 0.00 ft
Feb 23 — — 0.00 ft
Feb 24 — 0.58 ft 0.00 ft
Feb 25 — 0.28 ft 0.00 ft
Feb 26 — 0.02 ft 0.00 ft
Feb 27 — — 0.00 ft
Feb 28 — — 0.00 ft
Mar 1 — — 0.00 ft
Mar 2 — — 0.00 ft
Mar 3 — — 0.00 ft
Mar 4 — — 0.00 ft
Mar 5 — — 0.00 ft
Mar 6 — — 0.00 ft
Mar 7 — — 0.00 ft
Mar 8 — — 0.00 ft
Mar 9 — — 0.00 ft
Mar 10 — — 0.00 ft
Mar 11 — — 0.00 ft
Mar 12 — — 0.31 ft
Mar 13 — — 0.00 ft
Mar 14 — — 0.27 ft
Mar 15 — — 0.00 ft
Mar 16 — — 0.16 ft
Mar 17 — — 0.34 ft
Mar 18 — — 0.06 ft
Mar 19 — — 0.00 ft
Mar 20 — — 0.00 ft
Mar 21 — — 0.00 ft
Mar 22 — — 0.00 ft
Mar 23 — — 0.00 ft
Mar 24 — — 0.00 ft
Mar 25 — — 0.00 ft
Mar 26 — — 0.00 ft
Mar 27 — — 0.09 ft
Mar 28 — — 0.00 ft
Mar 29 — — 0.00 ft
Mar 30 — — 0.00 ft
Mar 31 — — 0.07 ft
Apr 1 — — 0.07 ft
Apr 2 — — 0.00 ft
Apr 3 — — 0.00 ft
Apr 4 — — 0.00 ft
Apr 5 — — 0.00 ft
Apr 6 — — 0.00 ft
Apr 7 — — 0.00 ft
Apr 8 — — 0.00 ft
Apr 9 — — 0.00 ft
Apr 10 — 0.42 ft 0.00 ft
Apr 11 — 0.49 ft 0.00 ft
Apr 12 — 0.12 ft 0.00 ft
Apr 13 — — 0.00 ft
Apr 14 — — 0.00 ft
Apr 15 — — 0.00 ft
Apr 16 — — 0.00 ft
Apr 17 — — 0.00 ft
Apr 18 — — 0.00 ft
Apr 19 — — 0.00 ft
Apr 20 — 0.27 ft 0.00 ft
Apr 21 — 0.33 ft 0.00 ft
Apr 22 — 0.37 ft 0.00 ft
Apr 23 — — 0.00 ft
Apr 24 — — 0.00 ft
Apr 25 — — 0.00 ft
Apr 26 — — 0.00 ft
Apr 27 — — 0.00 ft
Apr 28 — — 0.00 ft
Apr 29 — — 0.00 ft
Apr 30 — — 0.00 ft
May 1 — — 0.00 ft
May 2 — — 0.00 ft
May 3 — — 0.00 ft
May 4 — 0.15 ft 0.00 ft
May 5 — — 0.00 ft
May 6 — — 0.00 ft
May 7 — — 0.00 ft
May 8 — — 0.00 ft
May 9 — — 0.00 ft
May 10 — — 0.00 ft
May 11 — — 0.00 ft
May 12 — — 0.00 ft
May 13 — — 0.00 ft
May 14 — — 0.00 ft
May 15 — — 0.00 ft
May 16 — — 0.00 ft
May 17 — — 0.00 ft
May 18 — — 0.00 ft
May 19 — — 0.00 ft
May 20 — — 0.00 ft
May 21 — — 0.00 ft
May 22 — — 0.00 ft
May 23 — — 0.00 ft
May 24 — — 0.00 ft
May 25 — — 0.00 ft
May 26 — — 0.00 ft
May 27 — — 0.00 ft
May 28 — — 0.00 ft
May 29 — — 0.00 ft
May 30 — — 0.00 ft
May 31 — — 0.00 ft
Jun 1 — — 0.00 ft
Jun 2 — — 0.00 ft
Jun 3 — — 0.00 ft
Jun 4 — — 0.00 ft
Jun 5 — — 0.00 ft
Jun 6 — — 0.00 ft
Jun 7 — — 0.00 ft
Jun 8 — — 0.00 ft
Jun 9 — — 0.00 ft
Jun 10 — — 0.00 ft
Jun 11 — — 0.00 ft
Jun 12 — — 0.00 ft
Jun 13 — — 0.00 ft
Jun 14 — — 0.00 ft
Jun 15 — — 0.00 ft
Jun 16 — — 0.00 ft
Jun 17 — — 0.00 ft
Jun 18 — — 0.00 ft
Jun 19 — — 0.00 ft
Jun 20 — — 0.00 ft
Jun 21 — — 0.00 ft
Jun 22 — — 0.00 ft
Jun 23 — — 0.00 ft
Jun 24 — — 0.00 ft
Jun 25 — — 0.00 ft
Jun 26 — — 0.00 ft
Jun 27 — — 0.00 ft
Jun 28 — — 0.00 ft
Jun 29 — — 0.00 ft
Jun 30 — — 0.00 ft
Jul 1 — — 0.00 ft
Jul 2 — — 0.00 ft
Jul 3 — — 0.00 ft
Jul 4 — — 0.00 ft
Jul 5 — — 0.00 ft
Jul 6 — — 0.00 ft
Jul 7 — — 0.00 ft
Jul 8 — — 0.00 ft
Jul 9 — — 0.00 ft
Jul 10 — — 0.00 ft
Jul 11 — — 0.00 ft
Jul 12 — — 0.00 ft
Jul 13 — — 0.00 ft
Jul 14 — — 0.00 ft
Jul 15 — — 0.00 ft
Jul 16 — — 0.00 ft
Jul 17 — — 0.00 ft
Jul 18 — — 0.00 ft
Jul 19 — — 0.00 ft
Jul 20 — — 0.00 ft
Jul 21 — — 0.00 ft
Jul 22 — — 0.00 ft
Jul 23 — — 0.00 ft
Jul 24 — — 0.00 ft
Jul 25 — — 0.00 ft
Jul 26 — — 0.00 ft
Jul 27 — — 0.00 ft
Jul 28 — — 0.00 ft
Jul 29 — — 0.00 ft
Jul 30 — — 0.00 ft
Jul 31 — — 0.00 ft
Aug 1 — — 0.00 ft
Aug 2 — — 0.00 ft
Aug 3 — — 0.00 ft
Aug 4 — — 0.00 ft
Aug 5 — — 0.00 ft
Aug 6 — — 0.00 ft
Aug 7 — — 0.00 ft
Aug 8 — — 0.00 ft
Aug 9 — — 0.00 ft
Aug 10 — — 0.00 ft
Aug 11 — — 0.00 ft
Aug 12 — — 0.00 ft
Aug 13 — — 0.00 ft
Aug 14 — — 0.00 ft
Aug 15 — — 0.00 ft
Aug 16 — — 0.00 ft
Aug 17 — — 0.00 ft
Aug 18 — — 0.00 ft
Aug 19 — — 0.00 ft
Aug 20 — — 0.00 ft
Aug 21 — — 0.00 ft
Aug 22 — — 0.00 ft
Aug 23 — — 0.00 ft
Aug 24 — — 0.00 ft
Aug 25 — — 0.00 ft
Aug 26 — — 0.00 ft
Aug 27 — — 0.00 ft
Aug 28 — — 0.00 ft
Aug 29 — — 0.00 ft
Aug 30 — — 0.00 ft
Aug 31 — — 0.00 ft
Sep 1 — — 0.00 ft
Sep 2 — — 0.00 ft
Sep 3 — — 0.00 ft
Sep 4 — — 0.00 ft
Sep 5 — — 0.00 ft
Sep 6 — — 0.00 ft
Sep 7 — — 0.00 ft
Sep 8 — — 0.00 ft
Sep 9 — — 0.00 ft
Sep 10 — — 0.00 ft

Other years' days are in the tables above; the chart draws them thin and gray and this year bold, one line per gage. For the raw readings, see Recent readings and downloads.

Where the gage is

One marker for every gage of this stream; the same locations are written out beside the map.

Map data: © OpenStreetMap contributors · Report a map issue

The gages

The creek

Stream map coming soon — the stream's course has not been added yet.

Recent readings and downloads

96 readings, oldest first. Sorting and paging need JavaScript; every row is already here.

Every recent reading from Browns Valley Creek at McCormick Ln. Times are gage-local (Pacific time) and UTC; values are in the units named in each heading.
Local time UTC time Gage Water level (ft)
2026-04-10T16:45:19Z Browns Valley Creek at McCormick Ln 0.36 ft
2026-04-10T17:05:19Z Browns Valley Creek at McCormick Ln 0.25 ft
2026-04-10T17:53:19Z Browns Valley Creek at McCormick Ln 0.15 ft
2026-04-10T18:27:19Z Browns Valley Creek at McCormick Ln 0.04 ft
2026-04-11T03:33:19Z Browns Valley Creek at McCormick Ln 0.18 ft
2026-04-11T03:35:19Z Browns Valley Creek at McCormick Ln 0.44 ft
2026-04-11T03:37:19Z Browns Valley Creek at McCormick Ln 0.70 ft
2026-04-11T03:39:19Z Browns Valley Creek at McCormick Ln 0.91 ft
2026-04-11T03:53:19Z Browns Valley Creek at McCormick Ln 0.71 ft
2026-04-11T04:05:19Z Browns Valley Creek at McCormick Ln 0.51 ft
2026-04-11T04:21:19Z Browns Valley Creek at McCormick Ln 0.38 ft
2026-04-11T04:43:19Z Browns Valley Creek at McCormick Ln 0.28 ft
2026-04-11T05:03:19Z Browns Valley Creek at McCormick Ln 0.17 ft
2026-04-11T05:45:19Z Browns Valley Creek at McCormick Ln 0.06 ft
2026-04-11T18:13:19Z Browns Valley Creek at McCormick Ln 0.08 ft
2026-04-11T18:43:19Z Browns Valley Creek at McCormick Ln 0.06 ft
2026-04-11T20:11:19Z Browns Valley Creek at McCormick Ln 0.18 ft
2026-04-11T20:45:19Z Browns Valley Creek at McCormick Ln 0.07 ft
2026-04-11T23:49:19Z Browns Valley Creek at McCormick Ln 0.09 ft
2026-04-12T00:03:19Z Browns Valley Creek at McCormick Ln 0.20 ft
2026-04-12T00:21:19Z Browns Valley Creek at McCormick Ln 0.10 ft
2026-04-12T00:31:19Z Browns Valley Creek at McCormick Ln 0.31 ft
2026-04-12T00:35:19Z Browns Valley Creek at McCormick Ln 0.57 ft
2026-04-12T00:39:19Z Browns Valley Creek at McCormick Ln 0.84 ft
2026-04-12T00:41:19Z Browns Valley Creek at McCormick Ln 1.06 ft
2026-04-12T00:43:19Z Browns Valley Creek at McCormick Ln 1.26 ft
2026-04-12T00:45:19Z Browns Valley Creek at McCormick Ln 1.34 ft
2026-04-12T01:21:19Z Browns Valley Creek at McCormick Ln 1.19 ft
2026-04-12T01:35:19Z Browns Valley Creek at McCormick Ln 1.01 ft
2026-04-12T02:03:19Z Browns Valley Creek at McCormick Ln 0.88 ft
2026-04-12T02:19:19Z Browns Valley Creek at McCormick Ln 0.71 ft
2026-04-12T02:33:34Z Browns Valley Creek at McCormick Ln 0.56 ft
2026-04-12T02:49:19Z Browns Valley Creek at McCormick Ln 0.44 ft
2026-04-12T03:09:19Z Browns Valley Creek at McCormick Ln 0.32 ft
2026-04-12T03:35:19Z Browns Valley Creek at McCormick Ln 0.22 ft
2026-04-12T04:11:19Z Browns Valley Creek at McCormick Ln 0.12 ft
2026-04-12T05:27:19Z Browns Valley Creek at McCormick Ln 0.02 ft
2026-04-12T06:01:19Z Browns Valley Creek at McCormick Ln 0.12 ft
2026-04-12T07:19:19Z Browns Valley Creek at McCormick Ln 0.01 ft
2026-04-12T20:01:19Z Browns Valley Creek at McCormick Ln 0.08 ft
2026-04-12T20:09:19Z Browns Valley Creek at McCormick Ln 0.28 ft
2026-04-12T20:35:19Z Browns Valley Creek at McCormick Ln 0.18 ft
2026-04-12T20:55:19Z Browns Valley Creek at McCormick Ln 0.07 ft
2026-04-20T23:51:19Z Browns Valley Creek at McCormick Ln 0.06 ft
2026-04-21T00:19:19Z Browns Valley Creek at McCormick Ln 0.16 ft
2026-04-21T00:45:19Z Browns Valley Creek at McCormick Ln 0.13 ft
2026-04-21T01:01:19Z Browns Valley Creek at McCormick Ln 0.25 ft
2026-04-21T01:15:19Z Browns Valley Creek at McCormick Ln 0.40 ft
2026-04-21T02:29:19Z Browns Valley Creek at McCormick Ln 0.29 ft
2026-04-21T03:21:19Z Browns Valley Creek at McCormick Ln 0.19 ft
2026-04-21T03:51:19Z Browns Valley Creek at McCormick Ln 0.08 ft
2026-04-21T04:17:19Z Browns Valley Creek at McCormick Ln 0.20 ft
2026-04-21T04:33:19Z Browns Valley Creek at McCormick Ln 0.30 ft
2026-04-21T05:19:19Z Browns Valley Creek at McCormick Ln 0.42 ft
2026-04-21T05:37:19Z Browns Valley Creek at McCormick Ln 0.31 ft
2026-04-21T05:59:19Z Browns Valley Creek at McCormick Ln 0.42 ft
2026-04-21T06:13:19Z Browns Valley Creek at McCormick Ln 0.54 ft
2026-04-21T07:05:19Z Browns Valley Creek at McCormick Ln 0.43 ft
2026-04-21T07:35:19Z Browns Valley Creek at McCormick Ln 0.33 ft
2026-04-21T08:09:19Z Browns Valley Creek at McCormick Ln 0.43 ft
2026-04-21T08:25:19Z Browns Valley Creek at McCormick Ln 0.54 ft
2026-04-21T08:55:19Z Browns Valley Creek at McCormick Ln 0.64 ft
2026-04-21T09:49:19Z Browns Valley Creek at McCormick Ln 0.44 ft
2026-04-21T10:09:19Z Browns Valley Creek at McCormick Ln 0.33 ft
2026-04-21T10:37:19Z Browns Valley Creek at McCormick Ln 0.22 ft
2026-04-21T11:25:19Z Browns Valley Creek at McCormick Ln 0.33 ft
2026-04-21T12:33:19Z Browns Valley Creek at McCormick Ln 0.23 ft
2026-04-21T12:45:19Z Browns Valley Creek at McCormick Ln 0.23 ft
2026-04-21T13:31:19Z Browns Valley Creek at McCormick Ln 0.13 ft
2026-04-21T14:59:19Z Browns Valley Creek at McCormick Ln 0.02 ft
2026-04-22T12:25:19Z Browns Valley Creek at McCormick Ln 0.06 ft
2026-04-22T12:41:19Z Browns Valley Creek at McCormick Ln 0.24 ft
2026-04-22T14:13:19Z Browns Valley Creek at McCormick Ln 0.34 ft
2026-04-22T14:39:19Z Browns Valley Creek at McCormick Ln 0.44 ft
2026-04-22T15:15:19Z Browns Valley Creek at McCormick Ln 0.54 ft
2026-04-22T15:25:19Z Browns Valley Creek at McCormick Ln 0.77 ft
2026-04-22T15:49:19Z Browns Valley Creek at McCormick Ln 0.66 ft
2026-04-22T16:21:19Z Browns Valley Creek at McCormick Ln 0.42 ft
2026-04-22T16:41:19Z Browns Valley Creek at McCormick Ln 0.31 ft
2026-04-22T17:09:19Z Browns Valley Creek at McCormick Ln 0.20 ft
2026-04-22T17:49:19Z Browns Valley Creek at McCormick Ln 0.10 ft
2026-05-05T04:29:19Z Browns Valley Creek at McCormick Ln 0.07 ft
2026-05-05T04:41:19Z Browns Valley Creek at McCormick Ln 0.28 ft
2026-05-05T05:15:19Z Browns Valley Creek at McCormick Ln 0.18 ft
2026-05-05T06:09:19Z Browns Valley Creek at McCormick Ln 0.07 ft
2026-10-20T23:53:19Z Browns Valley Creek at McCormick Ln 0.34 ft
2026-10-23T12:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-24T00:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-24T12:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-25T00:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-25T12:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-26T00:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-26T12:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-27T00:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-27T12:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft
2026-10-28T00:51:19Z Browns Valley Creek at McCormick Ln 0.00 ft

Download the data

Download all readings for this stream (CSV) 171 B

This is the complete record for Browns Valley Creek as one CSV file, rebuilt by the publisher on every build. The archive copy of the same readings may be split into yearly segments; this file is not a link to a segment and always has the same name.

What is in the file

One row per reading, plus a header row that is always there: UTF-8 without a byte-order mark, LF line endings, and RFC 4180 quoting, so a field is quoted only when it holds a comma, a quote, or a line break. Rows are in a fixed order — gage, then measurement, then time — which is what lets two versions of the file be compared line by line to find what changed. Values are the exact numbers the site stores, not rounded for display; the unit each one is in travels with it in the row, in unit_metric, unit_imperial, and raw_unit. Both observed_at_utc and ingested_at_utc are ISO-8601 in UTC with a trailing Z and whole seconds, so a timestamp is never ambiguous across the daylight-saving change; the local times in the table above are those same instants read in the gage's time zone.

stream_slug
Which stream the reading belongs to. Every row of this file is the same stream.
gage_slug
Which gage on that stream took it — a stream can have more than one.
logger_sn
The data logger's serial number, recorded with the reading and never rewritten.
sensor_sn
The sensor's serial number, so swapping a sensor later cannot move an old reading's provenance.
measurement_type
What was measured, as a code — the same codes this page labels in its own column headings.
observed_at_utc
When the reading was taken, as ISO-8601 UTC with a trailing Z, whole seconds: 2026-09-14T21:45:00Z.
value_metric
The value in metric units, exactly as the site stores it.
unit_metric
The unit value_metric is in, written in each row beside it.
value_imperial
The same value in US units, converted with the unit registry's factor and rounded to its precision plus two places.
unit_imperial
The unit value_imperial is in.
raw_value
The value as the logger reported it, before any conversion.
raw_unit
The unit raw_value is in, as the logger reported it.
source
Which ingest path produced the row, so a change of instrument is visible in the data.
ingested_at_utc
When the site stored the reading, in ISO-8601 UTC with a trailing Z — when it arrived, not when it was measured.

Attribution: data from LI-COR Cloud gages, published by Water Audit California. Please keep the gage and the observation time with any value you reuse, so it can be checked.

License: the readings are published under the MIT/X Consortium License.

About this data

Water level at gage: depth of water above the sensor, relative to the level recorded when the logger was installed. It is not a surveyed river stage and can't be compared between gages.

7-day average daily high temperature (7DADM): the mean of the daily maximum water temperature over seven consecutive local days, calculated only when all seven days are complete. The steelhead bands below are applied to that value, never to a single reading.

All times shown are gage-local time (America/Los_Angeles), the same zone the site is configured for; data files carry UTC timestamps.

Steelhead water-temperature bands, applied to the 7-day average daily high.
Band 7-day average daily high What it means
Good at or below 60.8 °F Good for young steelhead
Stressful above 60.8 °F and below 71.6 °F Stressful: slower growth, more disease
Dangerous at or above 71.6 °F Dangerous: can kill steelhead
Federal reference 68.0 °F Federal recovery-plan limit for suitable summer rearing.
Heat spike 75.2 °F A single reading or daily high at or above this value.

Biological thresholds from published research (EPA 2003 and others), not legal limits. Sources: EPA Region 10 (2003) Tables 1, 3, and 4; NMFS 2016 recovery plan, Vol. IV; WDOE 2002 via Carter 2005; Nielsen et al. 1994; Sullivan et al. 2000.

Thresholds are pending scientific review.

Seasonal limits for spawning and smoltification are configured but not applied.

Measurements come from LI-COR Cloud loggers and configured CDEC stations, published by Water Audit California.

Data: Napa County Flood Control and Water Conservation District (OneRain site 10928).

Also published as: NWS BVCC1.