CNRFC - Hydrology - River Guidance - Graphical RVF

SANTA MARGARITA RIVER - YSIDORA (YDRC1)

Latitude: 33.31º N	Longitude: 117.35º W	Elevation: 75 Feet
Location: San Diego County in California		River Group: Southern California

Issuance Time:

Mar 31 2023 at 1:50 PM PDT

Next Issuance:

Apr 01 2023 at 9:00 AM PDT

Monitor Stage: 8.2 Feet

Flood Stage: 11.2 Feet

Plot Type:

Observed Data Credit
	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
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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ043)

Today: Mostly sunny. Highs 65 to 69. Light winds becoming west 10 to 15 mph with gusts to 25 mph this afternoon.

Tonight: Mostly clear in the evening and becoming partly cloudy. Patchy fog overnight. Lows 43 to 48. Areas of winds west 10 to 15 mph in the evening becoming light.

Sunday: Patchy fog in the morning. Partly cloudy. Highs 63 to 66. Areas of winds south to 10 mph.

Sunday Night: Partly cloudy in the evening and becoming mostly cloudy. Lows 48 to 52. Areas of winds west 10 to 15 mph.

Monday: Mostly cloudy in the morning and becoming partly cloudy. Highs 59 to 62. Areas of winds west 10 to 20 mph with gusts to 35 mph and becoming 20 to 30 mph with gusts to 50 mph in the afternoon.

Monday Night: Partly cloudy in the evening and becoming clear. Windy, colder. Lows 37 to 44.

Tuesday: Mostly sunny. Highs 60 to 63.

Tuesday Night: Mostly clear. Lows 40 to 44.

Wednesday: Partly cloudy in the morning and becoming mostly sunny. Highs 61 to 64 near the coast to 64 inland.

Wednesday Night: Mostly clear in the evening and becoming partly cloudy. Lows 43 to 47.

Thursday: Partly cloudy. Highs 67 to 71.

Thursday Night: Partly cloudy. Lows around 50.

Friday: Partly cloudy. Highs 70 to 73.

Impacts - E19 Information
8.2 Feet	Personnel begin regular patrols along the levee.
11.2 Feet	Vandegrift Road has begun to flood downstream of the gage. Stuart Mesa Road closures can be expected.
13.3 Feet	Vandegrift Road flooded for several miles downstream of the gage site. Stuart Mesa Road is flooded near the bridge.
16.0 Feet	Widespread 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.

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Verification - Historical Graphical RVF
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