CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SANTA MARGARITA RIVER - YSIDORA (YDRC1)

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

Issuance Time:

Sep 21 2023 at 8:00 AM PDT

Next Issuance:

Sep 22 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
2022*	4,270	9.37	Dec 24, 2021
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
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

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.

Official 7 Day National Weather Service Forecast (CAZ043)

Today: Cloudy with patchy drizzle this morning, then partly cloudy this afternoon. Highs around 71. Light winds becoming west 10 mph this afternoon.

Tonight: Partly cloudy in the evening and becoming mostly cloudy. Lows 56 to 62. Areas of winds west to 10 mph in the evening becoming light.

Friday: Mostly cloudy in the morning and becoming cloudy. Highs 71 to 75. Light winds becoming west 10 mph in the afternoon.

Friday Night: Mostly cloudy. Patchy fog overnight. Lows 58 to 63. Areas of winds northwest 10 mph in the evening becoming light.

Saturday: Patchy fog in the morning. Partly cloudy. Highs 70 to 75 near the coast to 74 to 77 inland. Areas of winds northwest 10 to 15 mph.

Saturday Night: Partly cloudy. Patchy fog overnight. Lows 55 to 59.

Sunday: Mostly cloudy with patchy fog in the morning and becoming mostly sunny. Highs 70 to 75 near the coast to 75 to 78 inland.

Sunday Night: Mostly clear in the evening and becoming partly cloudy overnight with patchy fog. Lows 55 to 60.

Monday: Mostly cloudy with patchy fog in the morning and becoming mostly sunny. Highs 70 to 75 near the coast to 76 inland.

Monday Night: Mostly clear in the evening and becoming partly cloudy overnight with patchy fog. Lows 56 to 60.

Tuesday: Mostly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 70 to 75 near the coast to 76 inland.

Tuesday Night: Mostly clear in the evening and becoming partly cloudy overnight with patchy fog. Lows 57 to 61.

Wednesday: Partly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 71 to 76 near the coast to 76 to 79 inland.

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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