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:

Apr 20 2018 at 7:33 AM PDT

Next Issuance:

Apr 21 2018 at 9:00 AM PDT

Monitor Stage: 8.3 Feet

Flood Stage: 10.9 Feet

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
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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ043)

Tonight: Mostly clear in the evening and becoming partly cloudy. Patchy fog overnight. Lows 45 to 53. Light winds.

Saturday: Partly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 66 to 71 near the coast to 74 to 79 inland. Light winds.

Saturday Night: Partly cloudy in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 47 to 55. Light winds.

Sunday: Mostly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 65 to 70 near the coast to 74 to 79 inland. Light winds.

Sunday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 49 to 55. Light winds.

Monday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 64 to 69 near the coast to 71 to 76 inland.

Monday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 49 to 55.

Tuesday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 64 to 69 near the coast to 70 to 75 inland.

Tuesday Night: Partly cloudy in the evening and becoming cloudy. Patchy fog overnight. Lows 49 to 54.

Wednesday: Cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 63 to 68 near the coast to 68 to 73 inland.

Wednesday Night: Mostly clear in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 49 to 54.

Thursday: Mostly cloudy in the morning and becoming mostly sunny. Patchy fog in the morning. Highs 63 to 68 near the coast to 67 to 72 inland.

Thursday Night: Mostly clear in the evening and becoming mostly cloudy. Patchy fog overnight. Lows 50 to 55.

Friday: Mostly cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 65 to 70.

Impacts - E19 Information
8.3 Feet	Personnel have already started regular patrols of roads and levee.
10.93 Feet	Vandegrift Road begins to flood downstream of the gage site. Stuart Mesa Road closures can be expected.
13.25 Feet	Vandegrift 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 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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