National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SANTA MARGARITA RIVER - YSIDORA (YDRC1)
Latitude: 33.31º NLongitude: 117.35º WElevation: 75 Feet
Location: San Diego County in CaliforniaBulletin Group: Southern CaliforniaRiver Group: San Diego/Inland
Monitor Stage: 8.2 FeetFlood Stage: 11.2 Feet

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

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2022*
4,270
9.37
Dec 24, 2021
2021*
1,120
7.31
Dec 29, 2020
2020*
6,680
10.78
Apr 10, 2020
2019*
29,500
15.07
Feb 14, 2019
2018*
1,830
7.18
Jan 10, 2018
 Historical High Stage/Flow Events (Period of Record - Sep 2001 to Present)** - Ranked by Flow
1993*
44,000***
20.47***
Jan 16, 1993
1927
33,600****
18.00
Feb 16, 1927
2017*
31,200
14.60
Jan 22, 2017
1938
31,000
12.70
Mar 3, 1938
2019*
29,500
15.07
Feb 14, 2019
2005* 25,600*** 13.5*** Jan 11, 2005
1980* 24,000*** 18.80 Feb 18, 1980
* Discharge affected by regulation or diversion
** Most recent continuous record back to Sep 2001 with segmented periods back to Feb 1923
*** Estimated value
**** Highest flow since regulation by Skinner Reservoir began in 1974
Location Photographs
ESRI™ Locator Map
Impacts - E19 Information
8.2 FeetPersonnel begin regular patrols along the levee.
11.2 FeetVandegrift Road has begun to flood downstream of the gage. Stuart Mesa Road closures can be expected.
13.3 FeetVandegrift Road flooded for several miles downstream of the gage site. Stuart Mesa Road is flooded near the bridge.
16.0 FeetWidespread inundation on Camp Pendleton with base evacuations likely. 01/16/1993 - flood of record.
Official 7 Day National Weather Service Forecast   (CAZ043)
Today: Showers likely. Highs around 62. Areas of winds southwest 10 to 20 mph. Gusts to 25 mph and becoming 30 mph this afternoon. Chance of measurable precipitation 70 percent.

Tonight: Mostly cloudy. A chance of showers. Lows 50 to 54. Areas of winds west 10 to 15 mph with gusts to 25 mph. Chance of measurable precipitation 40 percent.

Sunday: Mostly cloudy with a chance of showers. Highs around 61. Areas of winds west 10 to 15 mph with gusts to 25 mph. Chance of measurable precipitation 40 percent.

Sunday Night: Partly cloudy. Lows 44 to 51. Areas of winds northwest 10 to 15 mph. Gusts to 25 mph in the evening.

Monday: Partly cloudy. Highs 62 to 65. Areas of winds northwest 10 to 15 mph.

Monday Night: Partly cloudy in the evening and becoming mostly cloudy. Lows 44 to 48.

Tuesday: Partly cloudy. Highs 63 to 66.

Tuesday Night: Partly cloudy. Lows 46 to 50.

Wednesday: Mostly cloudy in the morning and becoming partly cloudy. A slight chance of rain. Highs 62 to 65.

Wednesday Night: Partly cloudy. A slight chance of showers in the evening, then a chance of showers overnight. Lows 47 to 51.

Thursday: Partly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs 62 to 65.

Thursday Night: Mostly clear. Lows 44 to 48.

Friday: Mostly sunny. Highs around 70.
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.