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: May 22 2017 at 7:05 AM PDTNext Issuance: May 23 2017 at 9:00 AM PDT
Monitor Stage: 8.3 FeetFlood Stage: 10.8 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
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
2011*
18,288
12.29
Dec 22, 2010
 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 in the evening and becoming cloudy. Areas of fog overnight. Lows 52 to 57. Light winds.

Tuesday: Cloudy in the morning and becoming mostly sunny. Areas of fog in the morning. Highs 68 to 73 near the coast to 75 to 80 inland. Light winds.

Tuesday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 52 to 57. Light winds.

Wednesday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 65 to 70 near the coast to 70 to 75 inland. Light winds.

Wednesday Night: Mostly cloudy. Patchy fog overnight. Lows 53 to 58. Light winds.

Thursday: Cloudy in the morning and becoming partly cloudy. Highs 65 to 70.

Thursday Night: Partly cloudy in the evening, then cloudy with a slight chance of showers overnight. Lows 53 to 58.

Friday: Cloudy with a slight chance of showers in the morning, then mostly cloudy in the afternoon. Highs 64 to 69.

Friday Night: Mostly cloudy. Lows 52 to 57.

Saturday: Cloudy in the morning and becoming partly cloudy. Highs 63 to 68 near the coast to 69 inland.

Saturday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 52 to 57.

Sunday: Cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 64 to 69 near the coast to 70 inland.

Sunday Night: Mostly clear in the evening and becoming cloudy. Patchy fog overnight. Lows 54 to 59.

Memorial Day: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 66 to 71 near the coast to 72 inland.
Impacts - E19 Information
8.3 FeetPersonnel have already started regular patrols of roads and levee.
10.78 FeetVandegrift Road begins to flood downstream of the gage site. Stuart Mesa Road closures can be expected.
13.3 FeetVandegrift Road flooded and is flooded for several miles downstream of the gage site. Stuart Mesa bridge has been overtopped. A portion of Stuart Mesa Road is 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.