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:

Feb 20 2019 at 2:36 PM PST

Next Issuance:

Feb 21 2019 at 9:00 AM PST

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
2017*	31,200	14.60	Jan 22, 2017
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
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
2017*	31,200	14.60	Jan 22, 2017
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)

Rest of Today: Partly cloudy with a chance of showers. Highs around 57. Areas of winds southwest 15 mph with gusts to 25 mph. Chance of measurable precipitation 50 percent.

Tonight: Showers. Lows 40 to 47. Areas of winds west 15 to 20 mph with gusts to 30 mph.

Thursday: Showers in the morning, then showers likely and slight chance of thunderstorms in the afternoon. Highs 53 to 58. Areas of winds west 15 to 20 mph. Gusts to 30 mph and becoming 25 mph in the afternoon.

Thursday Night: Partly cloudy. Showers likely and slight chance of thunderstorms in the evening, then slight chance of showers overnight. Colder. Lows 32 to 41. Areas of winds north 15 mph in the evening becoming light. Chance of measurable precipitation 70 percent.

Friday: Mostly sunny. Highs 56 to 61. Light winds becoming west 15 mph in the afternoon.

Friday Night: Mostly clear in the evening and becoming partly cloudy. Lows 33 to 43. Light winds.

Saturday: Partly cloudy in the morning and becoming mostly sunny. Highs 58 to 63.

Saturday Night: Mostly clear in the evening and becoming partly cloudy. Lows 37 to 45.

Sunday: Partly cloudy. Highs around 61.

Sunday Night: Mostly clear. Lows 40 to 48.

Monday: Mostly sunny. Highs around 62.

Monday Night: Mostly clear. Lows 41 to 48.

Tuesday: Mostly sunny. Highs around 64.

Tuesday Night: Partly cloudy. Lows 41 to 49.

Wednesday: Partly cloudy. Highs 63 to 68.

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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