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
Monitor Stage: 8.3 FeetFlood Stage: 10.9 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
2016*
1,060
7.14
Jan 7, 2016
2015*
1,550
7.15
Dec 4, 2014
2014*
2,230
7.76
Mar 1, 2014
2013*
218
5.66
Mar 8, 2013
2012*
263
5.67
Mar 26, 2012
 Historical High Stage/Flow Events (Period of Record - Sep 2001 to Present)**
1993*
44,000***
20.47***
Jan 16, 1993
1927
33,600****
18.00
Feb 16, 1927
1938
31,000
12.70
Mar 3, 1938
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)
Tonight: Partly cloudy with isolated showers. Lows 36 to 46. Light winds. Chance of measurable precipitation 20 percent.

Thursday: Mostly cloudy in the morning and becoming partly cloudy. Slight chance of showers. Highs around 60. Light winds. Chance of measurable precipitation 20 percent.

Thursday Night: Mostly cloudy. Slight chance of showers in the evening, then chance of showers overnight. Lows 39 to 49. Areas of winds west 15 mph with gusts to 25 mph. Chance of measurable precipitation 30 percent.

Friday: Mostly cloudy with a chance of showers in the morning, then partly cloudy in the afternoon. Highs around 59. Areas of winds west 15 mph. Gusts to 30 mph. Chance of measurable precipitation 30 percent.

Friday Night: Mostly clear. Colder. Lows 33 to 43. Areas of winds northwest 15 mph in the evening becoming light.

Saturday: Mostly sunny. Highs 61 to 66.

Saturday Night: Mostly clear. Lows 35 to 45.

Sunday: Mostly sunny. Highs 64 to 69.

Sunday Night: Mostly clear. Lows 38 to 48.

Monday: Mostly sunny in the morning, then partly cloudy with a slight chance of showers in the afternoon. Highs 65 to 70.

Monday Night: Partly cloudy with a slight chance of showers in the evening, then mostly cloudy with a chance of showers overnight. Lows 40 to 50.

Tuesday: Mostly cloudy in the morning and becoming partly cloudy. Chance of showers. Highs around 64.

Tuesday Night: Partly cloudy in the evening and becoming mostly cloudy. Chance of showers. Lows 40 to 50.

Wednesday: Mostly cloudy in the morning and becoming partly cloudy. Chance of showers. Highs 58 to 63.
Impacts - E19 Information
8.3 FeetPersonnel have already started regular patrols of roads and levee.
10.93 FeetVandegrift Road begins to flood downstream of the gage site. Stuart Mesa Road closures can be expected.
13.25 FeetVandegrift Road flooded and is flooded for several miles downstream of the gage site. Stuart Mesa bridge has been overtopped. Portions of Stuart Mesa Road near the bridge are flooded.
16.05 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.