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: Aug 16 2022 at 7:46 AM PDTNext Issuance: Aug 17 2022 at 9:00 AM PDT
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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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
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. Highs around 80 near the coast to this mid 80s inland. Light winds.

Tonight: Partly cloudy in the evening and becoming mostly cloudy. Patchy fog overnight. Lows in the upper 60s. Light winds.

Wednesday: Partly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs around 80 near the coast to in the upper 80s inland. Light winds.

Wednesday Night: Mostly clear in the evening and becoming partly cloudy. Patchy fog overnight. Lows in the mid 60s. Light winds.

Thursday: Partly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs in the upper 70s near the coast to in the mid 80s inland. Light winds.

Thursday Night: Mostly clear in the evening and becoming partly cloudy. Patchy fog overnight. Lows in the mid 60s.

Friday: Patchy fog in the morning. Partly cloudy. Highs in the upper 70s near the coast to in the lower 80s inland.

Friday Night: Partly cloudy. Patchy fog overnight. Lows in the mid 60s.

Saturday: Patchy fog in the morning. Partly cloudy. Highs in the upper 70s near the coast to in the lower 80s inland.

Saturday Night: Partly cloudy. Patchy fog overnight. Lows in the mid 60s.

Sunday: Patchy fog in the morning. Partly cloudy. Highs in the mid 70s near the coast to in the lower 80s inland.

Sunday Night: Partly cloudy. Patchy fog overnight. Lows in the mid 60s.

Monday: Partly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs in the upper 70s near the coast to in the lower 80s inland.
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.