CNRFC - Hydrology - Observed River/Reservoir Conditions

End of River Group

SUSAN RIVER - SUSANVILLE (SUSC1)

Latitude: 40.41º N	Longitude: 120.66º W	Elevation: 4190 Feet
Location: Lassen County in California		River Group: Eastern Sierra

Monitor Stage: 10.5 Feet

Flood Stage: 12.0 Feet

Plot Type:

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

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021*	106**	4.70	Feb 12, 2021
2020*	194**	5.34	Apr 1, 2020
2019*	1,310**	9.71	Feb 14, 2019
2018*	1,570**	10.00	Mar 22, 2018
2017*	3,950**	15.18	Feb 9, 2017
Historical High Stage/Flow Events (Period of Record - Discontinuous Jul 1951 to Present)**** - Ranked by Flow
1970*	5,850	8.89***	Jan 24, 1970
1997*	5,150**	11.75***	Jan 02, 1997
1986*	5,120	8.33***	Feb 17, 1986
1965*	5,100	7.30***	Dec 22, 1964
1982*	4,560	7.95***	Nov 23, 1981
* Discharge affected by regulation or diversion
** Estimated flow (Not Official)
*** USGS gage located 0.5 mile upstream at different datum.
**** Most recent record back to Jul 1951 (missing 1995 to 2000) with segmented periods back to Jun 1900

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ071)

Today: Mostly cloudy with a slight chance of snow showers in the morning, then sunny in the afternoon. Highs 40 to 50. West winds 15 to 25 mph with gusts up to 40 mph.

Tonight: Clear in the evening then becoming partly cloudy. Lows 20 to 30. West winds around 10 mph shifting to the east after midnight.

Tuesday: Snow showers likely. Snow accumulation of 1 to 4 inches. Highs 38 to 48. East winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon. Gusts up to 35 mph.

Tuesday Night: Cloudy. Chance of showers in the evening, then chance of snow showers after midnight. Lows 22 to 32. Northeast winds 10 to 15 mph with gusts up to 30 mph shifting to the west after midnight.

Wednesday: Mostly cloudy. Chance of showers. Highs 39 to 49. West winds 10 to 15 mph.

Wednesday Night: Mostly cloudy. Slight chance of showers. Lows 23 to 33.

Thursday and Thursday Night: Mostly cloudy with a chance of showers. Highs 42 to 52. Lows 21 to 31.

Friday and Friday Night: Mostly cloudy with a chance of snow showers. Highs 37 to 47. Lows 13 to 23.

Saturday through Sunday: Partly cloudy with a chance of snow showers. Highs 37 to 47. Lows 13 to 23.

Impacts - E19 Information
10.5 Feet	Those along river should begin careful monitoring of river and keep informed of forecast updates. Localized minor lowland flooding below Susanville in Johntonville, Leavitt Lake, Standish, and Litchfield rural areas.
11.0 Feet	Local minor lowland flooding below Susanville in Johnstonville, Leavitt Lake, Standish, and Litchfield rural areas.
11.5 Feet	Localized minor to moderate lowland flooding below Susanville in the Johnstonville, Leavitt Lake, Standish, and Litchfield rural areas.
12.0 Feet	Flood Stage - Several homes on Carroll Street in Susanville begin to flood. Local flooding in Susanville from Lassen Street downstream along Riverside Drive, especially below Piute Creek which enters river near Alexander Drive. Moderate lowland flooding below Susanville in Johnstonville, Leavitt Lake, Standish, and Litchfield areas. Some rural roads affected by flooding.
12.5 Feet	Minor to moderate flooing in Susanville from Lassen Street downstream along Riverside Drive. Several homes along river affected, especially on Carroll Street. Moderate lowland flooding below Susanville in Johnstonville, Leavitt Lake, Standish, and Litchfield areas. Rural roads and bridges begin to flood in these areas.
13.0 Feet	Moderate flooding in Susanville from Lassen Street downstream along Riverside Drive. Some homes along river have moderate flood affects, especially on Carroll Street. Significant lowland flooding below Susanville in Johnstonville, Leavitt Lake, Standish, and Litchfield areas. Rural roads and bridges in these areas flood. Similar to flood of 03/13/1983.
13.5 Feet	Moderate to major flooding in Susanville, Johnstonville, Leavitt Lake, Standish, and Litchfield. Susanville flooded from Lassen Street downstream along Riverside Drive and from Cornell/River Street on north to Hood Street/Sunkist Drive on south. River up to botton of Lassen Street bridge. Many homes along river have minor to moderate flooding. Many roads and bridges in the Honey Lake Valley area flood, with moderate transportation impacts. Similar to 03/30/1974 and 01/21/1969 floods.
14.0 Feet	Major flooding in Susanville, Johnstonville, Leavitt Lake, Standish, and Litchfield. Susanville flooded from Lassen Street downstream along Riverside Drive and from Main St (Highway 36) on north to railroad tracks on south. Many homes, businesses, schools, roads, and bridges in the Honey Lake Valley area flooded. Serious transportation impacts. Impacts to power, phone, and rural water systems begin. Similar to 02/24/1958 flood.
14.5 Feet	Major flooding in Susanville, Johnstonville, Leavitt Lake, Standish, and Litchfield areas in Honey Lake Valley. Susanville flooded from Lassen Street downstream along Riverside Drive and from Main Street (Highway 36) on north to railroad tracks on south. Serious flood impacts to homes, businesses, schools, roads, and bridges throughout Honey Lake Valley. US Highway 395 flooded. Serious transportation impacts, moderate impacts to power, phone, and rural water systems. Similar to 12/23/1955 flood.
15.0 Feet	Major flooding in Susanville, Johnstonville, Leavitt Lake, Standish, and Litchfield areas. Major flooding in Susanville from Lassen Street downstream along Riverside Drive, and from Main Street (Highway 36) on north to railroad tracks on south. Serious flood impacts to homes, businesses, schools, roads, and bridges throughout Honey Lake Valley. US Highway 395 flooded. Serious transportation, power, phone, and rural water system impacts. Similar to 01/31/1963 and 01/13/1980 floods.
15.5 Feet	Major flood damage from Susanville to Honey Lake. Flooding of homes, businesses and schools in flood plain throughout Honey Lake Valley, including Susanville. Extensive damage to transportation systems as roads, bridges, and culverts are flooded or washed out. US Highway 395 is flooded. Major transportation, power, phone, and rural water system impacts. Similar to 01/31/1963 flood.
16.0 Feet	Extensive flood damage from Susanville to Honey Lake. Serious flood impacts to homes, businesses, schools, roadways, and bridges in flood plain throughout Honey Lake Valley. Transportation impacts may be serious as US Highway 395 and Highway 36 are flooded. Extensive power, phone, and rural water system impacts. Similar to 11/23/1981 flood.
16.5 Feet	Extensive flood damage from Susanville to Honey Lake with flooding of homes, businesses, schools, roadways, brides, and water systems in flood plain throughout Honey Lake Valley. Extensive transportation, power, phone, and rural water system impacts. US Highway 395 and Highway 36 flooded. Similar to 11/23/1981 flood.
17.0 Feet	Flood disaster from Susanville to Honey Lake. Extensive flooding of homes, businesses, schools, roadways, bridges, and water systems in flood plain throughout Honey Lake Valley. Transportation very difficult as US Highway 395 and Highway 36 flooded or washed out. Extensive power, phone, and rural water system impacts. Slightly less severe than floods of 12/22/1964, 02/17/1986, and 01/02/1997.
17.5 Feet	Near record flooding from Susanville to Honey Lake. Extensive damage to homes, businesses, schools, roadways, bridges, and water systems in flood plain throughout Honey Lake Valley. Transportation in valley very difficult as US Highway 395 and Highway 36 flooded or washed out. Extensive power, phone, and rural water system impacts. Similar to floods of 12/22/1964, 02/17/1986, and 01/02/1997.
18.0 Feet	Near record flooding from Susanville to Honey Lake. Extensive damage to homes, businesses, schools, roads, bridges, and water systems in flood plain throughout Honey Lake Valley, including Susanville area. Transportation in and out of Honey Lake Valley cut off as US Highway 395 and Highway 36 flooded or washed out. Extensive power, phone, and rural water system impacts. Only exceeded by flood of 01/24/1970.
18.5 Feet	Record flooding from Susanville to Honey Lake. Extensive damage to homes, businesses, schools, road, bridges, and water systems throughout Honey Lake Valley, including Susanville area. Transportation in and out of valley cut off, as US Highway 395 and Highway 36 is flooded or washed out. Extensive power, phone, and rural water system impacts. Exceeds record flood of 01/24/1970.

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 Reno 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.

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