NOAA - National Weather Service - California Nevada River Forecast Center

SACRAMENTO RIVER - COLUSA WEIR (CLAC1)

Latitude: 39.24º N	Longitude: 121.99º W	Elevation: 62 Feet
Location: Colusa County in California		River Group: Upper Sacramento

Issuance Time:

Jun 18 2013 at 7:05 AM PDT

Next Issuance:

Jun 19 2013 at 9:00 AM PDT

Monitor Stage: 61.8 Feet

Flood Stage: 71.0 Feet

Danger Stage: 72.0 Feet

Colusa Weir Location - Sacramento River Channel Stage/Flow (Estimated)

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2012	0****	--	--
2011	49,388	67.83	Mar 22, 2011
2010	30,554	66.64	Jan 27, 2010
2009	7,929	64.41	Mar 3, 2009
2008	15,909	65.39	Jan 27, 2008
Historical High Stage/Flow Events (Period of Record - January 1911 to Present)
1940	--	70.60*	Mar 1, 1940
1983	81,500	68.96**	Mar 4, 1983
1997	71,000	68.85	Jan 3, 1997
1958	83,600	68.80***	Feb 21, 1958
1965	77,400	68.50	Jan 7, 1965
1943	--	68.30	Jan 24, 1943
* Peak prior to regulation by Shasta Dam
** Peak after regulation by Shasta Dam
*** Peak also occurred on Feb 26th
**** No weir flow observed during the entire water year

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

Google™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ016)

Today: Mostly sunny. Highs 77 to 83. Southeast winds up to 10 mph shifting to the northwest in the afternoon.

Tonight: Mostly clear. Lows around 57. Northwest winds up to 10 mph.

Thursday: Mostly sunny. Highs 82 to 88. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Thursday Night: Mostly clear. Lows 56 to 62. North winds up to 10 mph.

Friday: Mostly sunny. Highs 87 to 93. Northwest winds around 10 mph with gusts to around 20 mph.

Friday Night: Clear. Lows 59 to 65.

Saturday: Mostly sunny. Highs 90 to 96.

Saturday Night: Mostly clear. Lows 59 to 67.

Sunday: Partly cloudy. Highs 87 to 93.

Sunday Night through Monday Night: Mostly cloudy. Lows 61 to 67. Highs 85 to 93.

Tuesday: Partly cloudy. Highs 87 to 92.

Impacts - E19 Information
61.8 Feet	Colusa Weir crest elevation. Overflow begins into the Sutter Bypass.
74.8 Feet	Stages above 74.8 feet result in major flooding. Top of levee.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

Observed Data Credit
	Raw streamflow data is provided by the California Department of Water Resources. View CA DWR Data for this station location.