Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Corte Madera Creek at Ross

Highest listed crest 22.59 ftFlood stage 17.0 ft16 crests since 1951

The Corte Madera Creek at Ross crested above flood stage 7 times among the 16 crests the National Weather Service lists from 1951 to 2005. The highest, 22.59 ft on December 31, 2005, was moderate flooding, 5.59 feet above flood stage.

The gauge

Highest listed crest
22.59 ft
December 31, 2005
Flood stage
17.0 ft
Major flooding from 23.0 ft
Crests at major
0
7 above flood stage
Most recent flood crest
December 31, 2005
22.59 ft, moderate flooding
Location
Marin County
Near San Anselmo (1.5 mi), Larkspur (2.1 mi), San Rafael (3.0 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Corte Madera Creek at Ross
Action stage15.09Mar 13, 1983The level at which the NWS or its partners begin to take action
Flood stage (minor)17.06Feb 3, 1998Minimal or no property damage, but possibly some public threat
Moderate flood stage20.01Dec 31, 2005Some inundation of structures and roads near the stream
Major flood stage23.00—Extensive inundation of structures and roads

Every listed crest

16 crests from 1951 to 2005. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Corte Madera Creek at Ross, 1951 to 2005 141618202224ft Flood stage 17.0 ftMajor 23.0 ft Dec 3, 1951: 16.65 ft, action stage; 3,300 cubic feet per secondDec 7, 1952: 16.59 ft, action stage; 3,280 cubic feet per secondApr 2, 1958: 16.23 ft, action stage; 3,130 cubic feet per secondFeb 13, 1962: 16.01 ft, action stage; 2,690 cubic feet per secondJan 5, 1966: 16.62 ft, action stage; 2,880 cubic feet per secondJan 21, 1967: 17.44 ft, minor flooding; 3,120 cubic feet per secondDec 20, 1969: 17.97 ft, minor flooding; 3,290 cubic feet per secondJan 16, 1973: 16.16 ft, action stage; 2,690 cubic feet per secondMar 21, 1975: 15.97 ft, action stage; 2,640 cubic feet per secondJan 11, 1980: 16.45 ft, action stage; 2,910 cubic feet per secondJan 4, 1982: 19.81 ft, minor flooding; 7,200 cubic feet per secondMar 13, 1983: 16.89 ft, action stage; 3,480 cubic feet per secondFeb 17, 1986: 18.07 ft, minor flooding; 4,150 cubic feet per secondJan 20, 1993: 17.04 ft, minor flooding; 3,350 cubic feet per secondFeb 3, 1998: 17.50 ft, minor flooding; 3,736 cubic feet per secondDec 31, 2005: 22.59 ft, moderate flooding Highest, 22.59 ft, Dec 31, 2005 19601970198019902000

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Corte Madera Creek at Ross 1950s: 0 1960s: 2 2 1970s: 0 1980s: 2 1990s: 2 2000s: 1 1950s1960s1970s1980s1990s2000s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Corte Madera Creek at Ross
1Dec 31, 200522.59+5.59Moderate—
2Jan 4, 198219.81+2.81Minor7,200
3Feb 17, 198618.07+1.07Minor4,150
4Dec 20, 196917.97+0.97Minor3,290
5Feb 3, 199817.50+0.50Minor3,736
6Jan 21, 196717.44+0.44Minor3,120
7Jan 20, 199317.04+0.04Minor3,350
8Mar 13, 198316.89−0.11Action3,480
9Dec 3, 195116.65−0.35Action3,300
10Jan 5, 196616.62−0.38Action2,880
11Dec 7, 195216.59−0.41Action3,280
12Jan 11, 198016.45−0.55Action2,910
13Apr 2, 195816.23−0.77Action3,130
14Jan 16, 197316.16−0.84Action2,690
15Feb 13, 196216.01−0.99Action2,690
16Mar 21, 197515.97−1.03Action2,640

Other gauges in Marin County

Flood gauges in Marin County
Arroyo Corte Madera del Presidio8.08.11 ft, Jan 4, 19820
Novato (USGS)13.014.52 ft, Jan 4, 19820

Marin County: every hazard · River floods across the country · California

NOAA National Water Prediction Service, gauge CMDC1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.