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: Jul 15 2018 at 8:01 AM PDTNext Issuance: Jul 16 2018 at 9:00 AM PDT
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.

Verification - Historical Graphical RVF
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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 in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 63 to 68. Light winds.

Monday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 74 to 79 near the coast to 78 to 83 inland. Light winds.

Monday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 64 to 69. Light winds.

Tuesday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 76 to 81. Light winds.

Tuesday Night: Partly cloudy. Lows 64 to 69. Light winds.

Wednesday: Partly cloudy. Highs 73 to 78 near the coast to 78 to 83 inland.

Wednesday Night: Partly cloudy in the evening and becoming mostly cloudy. Patchy fog overnight. Lows around 67.

Thursday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 74 to 79 near the coast to 79 to 84 inland.

Thursday Night: Partly cloudy in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 65 to 70.

Friday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 75 to 80 near the coast to 80 to 85 inland.

Friday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 65 to 70.

Saturday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 75 to 80 near the coast to 81 to 86 inland.

Saturday Night: Partly cloudy in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 66 to 71.

Sunday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 76 to 81 near the coast to 82 to 87 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.