Corte Madera C A Ross water level

Name: Corte Madera C A Ross 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, California, United States

Directions

Below flood stage

Water level

4.21ft Steady over the last 24 hours

Measured Oct 19, 2026, 02:30 AM PDT (23 min ago)

Flow: 0.1 cfs

History

7 days

Water level Minor flood stage

What this means

The gauge at Corte Madera C A Ross reads 4.21 ft, a normal level.

It is 12.79 ft below the flood stage of 17.00 ft.

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 4.20 ft and 4.25 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: 22.59 ftDecember 31, 2005

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

The National Weather Service puts flood stage for this gauge at 17.00 ft, still 12.79 ft away.

What happens at each level

23.00 ft: Major Flood Stage. (Stage of 25.5 for co-located County ALERT stream gage.) Major flood inundation in town; travel along local roadways likely impossible and very dangerous. Major damage to local businesses and homes. Water is above guard rail on Lagunitas Road bridge.
20.00 ft: Moderate Flood Stage. (Stage of 22.5 for co-located County ALERT stream gage.) Lagunitas Road bridge is overtopped, and 1 to several feet of flood waters inundate local businesses, residences, and roadways.
17.00 ft: Minor Flood Stage. (Stage of 19.5 feet for co-located County ALERT stream gage.) Backwatering begins at Lagunitas Road bridge, with minor flooding near Town Hall and Fire Station. NWS will issue a Flash Flood Warning if not yet already issued.
15.00 ft: Action Stage. (Stage of 17.5 for co-located County ALERT stream gage.) Water level is 2 feet below Lagunitas Road bridge soffit, and less than 2 feet below local storm drain inlets on adjacent roads and parking lots. NWS will issue a Flash Flood Watch if not yet already issued.
4.21 ft: Right now

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

Highest crests on record

Rank	Level	Date
1	22.59 ft	December 31, 2005
2	19.81 ft	January 4, 1982
3	18.07 ft	February 17, 1986
4	17.97 ft	December 20, 1969
5	17.50 ft	February 3, 1998
6	17.44 ft	January 21, 1967
7	17.04 ft	January 20, 1993
8	16.89 ft	March 13, 1983
9	16.65 ft	December 3, 1951
10	16.62 ft	January 5, 1966

Weather at the gauge

No rain in the last 3 days.

18 Sun 77° 54° – Wind 12 mph

19 Mon 65° 51° – Wind 12 mph

20 Tue 67° 51° – Wind 5 mph

21 Wed 67° 57° 0.29 in, 49% Wind 6 mph

22 Thu 66° 54° 0.19 in, 23% Wind 5 mph

23 Fri 74° 53° – Wind 5 mph

24 Sat 78° 55° – Wind 5 mph

Forecast: Open-Meteo

Sunrise 07:23 AM Sunset 06:28 PM Daylight 11 hr, 5 min First quarter 58%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Redwood C A Highway 1 Bridge A Muir BeachRiver gauge	0.98 ft	Below flood stage	+0.02 ft	7 mi
Novato C A NovatoRiver gauge	2.77 ft	Below flood stage	+0.01 ft	10 mi
Lagunitas C A Samuel P Taylor State ParkRiver gauge	8.7 cfs	Normal	±0	11 mi
Olema C A Vedanta Bridge A OlemaRiver gauge	0.2 cfs	Low	+0.1 cfs	14 mi
Lagunitas Creek near Point Reyes StationRiver gauge, Lagunitas Creek	0.99 ft	Below flood stage	+0.01 ft	15 mi
Walker Creek near MarshallRiver gauge, Walker Creek	0.90 ft	Below flood stage	±0	20 mi
Sonoma C A Agua CalienteRiver gauge	0.7 cfs	Normal	+0.1 cfs	25 mi
Copeland C A Rohnert ParkRiver gauge	1.26 ft	Below flood stage	+0.04 ft	27 mi

Questions and answers

What is flood stage for Corte Madera C A Ross?

The official flood stage is 17.00 ft. The level is currently 12.79 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 Corte Madera C A Ross today?

On Oct 19, 2026, 02:30 AM PDT, the water level was 4.21 ft. Steady over the last 24 hours.

Is Corte Madera C A Ross rising or falling?

Steady over the last 24 hours.

Is the level of Corte Madera C A Ross normal?

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

What is the highest water level ever recorded at Corte Madera C A Ross?

The highest level on record is 22.59 ft on December 31, 2005.

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:11460000 (Agency page)
Coordinates: 37.96294, -122.55688 (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	4.21 ft	2026-10-19 09:30	Provisional
Flow	0.1 cfs	2026-10-19 09:30	Provisional

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How to cite

U.S. Geological Survey: Corte Madera C A Ross (usgs:11460000). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/corte-madera-c-a-ross

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