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)
Today: Mostly sunny. Highs 82 to 87 near the coast to 89 to 94 inland. Light winds.

Tonight: Mostly clear. Cooler. Lows 52 to 62. Light winds.

Friday: Mostly sunny. Highs 73 to 78 near the coast to 81 to 86 inland. Light winds.

Friday Night: Mostly clear in the evening and becoming partly cloudy. Patchy fog overnight. Lows 50 to 60. Light winds.

Saturday: Partly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 70 to 75 near the coast to 79 to 84 inland. Light winds.

Saturday Night: Mostly clear in the evening and becoming partly cloudy. Lows 50 to 58.

Sunday: Partly cloudy in the morning and becoming mostly sunny. Highs 68 to 73 near the coast to 74 to 79 inland.

Sunday Night: Mostly clear in the evening then areas of low clouds and fog. Lows 50 to 57.

Monday: Areas of low clouds and fog in the morning then partly cloudy. Highs 67 to 72.

Monday Night: Partly cloudy in the evening and becoming mostly clear. Lows 45 to 55.

Tuesday: Mostly sunny. Breezy, warmer. Highs 78 to 83.

Tuesday Night: Mostly clear. Lows 50 to 59.

Wednesday: Mostly sunny. Highs 76 to 81 near the coast to 82 inland.
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.