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
Issuance Time: Mar 28 2024 at 8:39 AM PDTNext Issuance: Mar 28 2024 at 3:00 PM PDT
Monitor Stage: 8.2 FeetFlood Stage: 11.2 Feet

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
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.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
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: Cloudy with patchy fog this morning and becoming partly cloudy. Highs 62 to 65 near the coast to 65 inland. Areas of winds north 10 to 15 mph. Gusts to 25 mph this afternoon.

Tonight: Mostly cloudy in the evening and becoming partly cloudy. Lows 46 to 51. Areas of winds northwest 10 to 15 mph. Gusts to 25 mph in the evening.

Friday: Mostly cloudy in the morning and becoming partly cloudy. Highs around 63. Areas of winds west 10 mph.

Friday Night: Partly cloudy in the evening, then mostly cloudy with a slight chance of rain overnight. Lows 47 to 51. Areas of winds south 10 to 20 mph. Gusts to 35 mph overnight. Chance of measurable precipitation 20 percent.

Saturday: Rain. Rain may be heavy at times. Highs 57 to 61. Areas of winds south 15 to 25 mph. Gusts to 40 mph and becoming 30 mph in the afternoon.

Saturday Night: Showers in the evening, then showers and a slight chance of thunderstorms overnight. Lows 45 to 50.

Sunday: Showers and a slight chance of thunderstorms. Highs 59 to 63.

Sunday Night: Mostly cloudy in the evening and becoming partly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows 46 to 50.

Monday: Partly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs 62 to 65.

Monday Night: Mostly clear. Lows 46 to 50.

Tuesday: Mostly sunny. Highs 67 to 72.

Tuesday Night: Mostly clear. Lows 47 to 52.

Wednesday: Mostly sunny. Highs 69 to 74.
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.