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SANTA MARGARITA - 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:

Jun 24, 2025 at 8:39 AM PDT

Action/Monitor: 8.2 Feet

Minor Flood: 11.2 Feet

Moderate Flood: 13.3 Feet

Major Flood: 16.0 Feet

Please Note:

Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty.

Threshold Exceedance Plot Product Information

CSV Ensemble Files (Data in kcfs): Forecast Group | YDRC1

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		Official Forecast (Deterministic)

		Prob. of Threshold Exceedance
		Model Traces

What information is considered in this forecast?

Verification / Historical Plots
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Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
16.0 Feet	Major flood, 37,000 cfs. Widespread inundation of Camp Pendleton with evacuations likely. Flood of Record Jan 16, 1993.
13.33 Feet	Moderate flood stage, 17,000 cfs. Vandegrift Road is flooded for several miles downstream of the gage site. Stuart Mesa Road is flooded near the bridge.
11.16 Feet	Minor flood stage, 8,000 cfs. Vandegrift Road has begun to flood downstream of the gage. Stuart Mesa Road closures can be expected.
8.18 Feet	2,500 cfs. The river has reached monitor stage. Personnel begin regular patrols along the levee.

Official 7 Day National Weather Service Forecast (CAZ043)

Tonight: Partly cloudy This Evening and becoming cloudy. Lows 54 to 59. Areas of winds west 10 mph This Evening becoming light.

Wednesday: Patchy fog in the morning. Partly cloudy. Highs 68 to 72 near the coast to 74 inland. Areas of winds west to 10 mph.

Wednesday Night: Partly cloudy. Patchy fog overnight. Lows 56 to 60. Areas of winds southwest 10 mph in the evening becoming light.

Thursday: Mostly cloudy in the morning and becoming partly cloudy. Highs 69 to 73 near the coast to 75 inland. Areas of winds west to 10 mph.

Thursday Night: Partly cloudy. Patchy fog overnight. Lows around 60. Areas of winds southwest 10 mph in the evening becoming light.

Friday: Patchy fog in the morning. Partly cloudy. Highs 70 to 74 near the coast to 77 inland.

Friday Night: Partly cloudy in the evening and becoming mostly cloudy overnight with patchy fog. Lows 57 to 61.

Saturday: Mostly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 71 to 74 near the coast to 76 to 79 inland.

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

Sunday: Mostly cloudy with patchy fog in the morning and becoming mostly sunny. Highs 72 to 76 near the coast to 79 inland.

Sunday Night: Mostly clear in the evening and becoming mostly cloudy overnight with patchy fog. Lows 57 to 62.

Monday: Cloudy with patchy fog in the morning and becoming mostly sunny. Highs 71 to 75 near the coast to 78 inland.

Monday Night: Partly cloudy in the evening and becoming mostly cloudy overnight with patchy fog. Lows 57 to 62.

Tuesday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 71 to 74 near the coast to 78 inland.

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