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 CaliforniaRiver Group: Southern California
Issuance Time: Nov 26 2022 at 8:14 AM PSTNext Issuance: Nov 27 2022 at 9:00 AM PST
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.

Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2017*
31,200
14.60
Jan 22, 2017
 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
Official 7 Day National Weather Service Forecast   (CAZ043)
Today: Partly cloudy this morning and becoming mostly sunny. Patchy fog this morning. Local visibility one quarter mile or less at times this morning. Highs in the mid 60s near the coast to the upper 60s inland. Light winds.

Tonight: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows around 50. Light winds.

Monday: Cloudy in the morning and becoming partly cloudy. Highs around 60. Light winds.

Monday Night: Partly cloudy in the evening and becoming mostly cloudy. Lows in the lower 50s. Light winds becoming west 15 mph with gusts to 25 mph overnight.

Tuesday: Mostly cloudy in the morning and becoming partly cloudy. Highs around 60. Areas of winds west 15 mph in the morning becoming light.

Tuesday Night: Mostly clear. Lows in the mid 40s.

Wednesday: Partly cloudy. Highs in the lower 60s.

Wednesday Night: Mostly clear in the evening and becoming partly cloudy. Lows in the upper 40s.

Thursday: Partly cloudy. Highs in the upper 50s.

Thursday Night: Mostly cloudy. A slight chance of showers overnight. Lows in the upper 40s.

Friday: Mostly cloudy in the morning and becoming partly cloudy. A slight chance of showers. Highs in the lower 60s.

Friday Night: Partly cloudy. A slight chance of showers overnight. Lows in the upper 40s.

Saturday: Partly cloudy with a slight chance of showers. Highs in the lower 60s.
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.
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.