CNRFC - Hydrology - Observed River/Reservoir Conditions

SAN LUIS REY RIVER - OCEANSIDE (SLOC1)

Latitude: 33.22º N	Longitude: 117.36º W	Elevation: 20 Feet
Location: San Diego County in California		Bulletin Group: Southern California		River Group: San Diego/Inland

Action/Monitor: N/A

Minor Flood: 21.0 Feet

Moderate Flood: 24.5 Feet

Major Flood: 28.0 Feet

Plot Type:

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	120	7.03	Mar 14, 2025
2024*	1,080	9.36	Feb 6, 2024
2023*	3,050	12.57	Mar 15, 2023
2022*	66	6.71	Dec 26, 2021
2021*	95	6.97	Jan 29, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1946 to Present)*** - Ranked by Flow
1916	95,600	--	Jan 27, 1916
1993**	25,700	21.70	Jan 16, 1993
1980*	25,000	14.00	Feb 21, 1980
2005*	21,800	20.68	Jan 11, 2005
1995*	19,500	19.97	Mar 06, 1995
1937*	16,500	12.00	Feb 07, 1937
* Discharge affected by regulation or diversion
** Maximum since regulation by Lake Henshaw
*** Most recent continuous record back to Oct 1946 with segmented periods back to Apr 1912
**** No flow recorded during the entire water year

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
28.0 Feet	Excess overflow of water has damaged some sewer and water mains in the city of oceanside. The lilac road bridge on the pala indian reservation has likely washed out. The rincon casino has been evacuated. Approaches to upstream crossings are likely damaged or washed out. North river road has likely been undermined in oceanside. The retainaing wall protecting homes in the rancho viejo project upstream from oceanside is likely compromised. Pala casino is at risk with possible evacuations.
24.5 Feet	Extent of damage unknown. It is possible that the approaches to several of the upstream crossings will be damaged or washed out. The lilac road bridge on the pala indian reservation is likely impassable. Undermining of north river road in oceanside is possible. Undermining of the retaining wall protecting homes in the rancho viejo project is possible. Businesses in the flood plain not protected by the levee are at risk of innundation, including the pala casino parking areas and the rincon casino itself.
21.0 Feet	Approaches to upstream bridges including camino del rey, shearer crossing, and couser canyon, among others, are threatened and possibly damaged. The lilac road bridge on the pala reservation is at risk.
12.0 Feet	LOW-WATER CROSSINGS CAN BE IMPACTED WELL UPSTREAM OF THE GAGE BEFORE SIGNIFICANT GAGE RESPONSE OCCURS. GAGE HEIGHTS OF 9.5 TO 12 FT HAVE BEEN ASSOCIATED WITH THE CLOSING OF COLE GRADE ROAD AND LILAC ROADS.

Official 7 Day National Weather Service Forecast (CAZ043)

Today: A slight chance of thunderstorms This Morning. Showers. Highs 65 to 68. Areas of winds south 10 to 15 mph with gusts to 25 mph.

Tonight: Mostly cloudy. A chance of showers. Lows 53 to 58. Light winds. Chance of measurable precipitation 40 percent.

Friday: Mostly cloudy in the morning and becoming partly cloudy. Highs 66 to 69. Light winds becoming south 10 mph in the afternoon.

Friday Night: Cloudy. A slight chance of showers overnight. Lows 53 to 56. Light winds. Chance of measurable precipitation 20 percent.

Saturday: Cloudy with a slight chance of showers. Highs 65 to 68. Areas of winds south 10 mph. Chance of measurable precipitation 20 percent.

Saturday Night: Cloudy. A chance of showers in the evening, then showers likely overnight. Lows 52 to 56.

Sunday: Showers likely. A slight chance of thunderstorms in the afternoon. Highs 64 to 67.

Sunday Night: Showers likely and a slight chance of thunderstorms. Lows 51 to 55.

Monday: Cloudy in the morning and becoming mostly cloudy. A chance of showers. Highs around 64.

Monday Night: Mostly cloudy with a chance of showers. Lows 49 to 53.

Tuesday: Cloudy in the morning and becoming mostly cloudy. A chance of showers. Highs 63 to 66.

Tuesday Night: Partly cloudy with a chance of showers. Lows 46 to 51.

Wednesday: Partly cloudy with a chance of showers. Highs 61 to 64.

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 San Diego 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.

NWS RSS Feed