Santa Margarita River - Ysidora (YDRC1)River Forecast Plot
Combination chart with 4 data series.
Forecast Posted: 07/07/2025 at 6:47 AM PDT ● Graphic Created: 07/07/2025 at 6:50 AM PDT
The chart has 1 X axis displaying Time. Range: 2025-07-02 13:00:00 to 2025-07-12 13:00:00.
The chart has 2 Y axes displaying Precipitation (In.) and Precipitation (In.).
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Chart
Combination chart with 7 data series.
The chart has 1 X axis displaying Observation / Forecast Time (Pacific Local Time). Range: 2025-07-02 06:00:00 to 2025-07-12 06:00:00.
The chart has 2 Y axes displaying Stage (Feet) and Flow (Cubic Feet per Second).
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Please Note: 1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.
2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
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
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)
Today: Partly cloudy with patchy fog this morning and becoming mostly sunny. Highs 70 to 74 near the coast to 76 to 79 inland. Areas of winds west to 10 mph.
Tonight: Partly cloudy in the evening and becoming mostly cloudy overnight with patchy fog. Lows 56 to 63. Areas of winds northwest 10 mph in the evening becoming light.
Tuesday: Mostly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 73 to 78 near the coast to 79 to 83 inland. Areas of winds northwest to 10 mph becoming west in the afternoon.
Tuesday Night: Mostly clear in the evening and becoming partly cloudy overnight with patchy fog. Lows 60 to 66. Areas of winds northwest 10 to 15 mph in the evening becoming light.
Wednesday: Partly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 75 to 79 near the coast to 81 to 84 inland. Areas of winds northwest to 10 mph.
Wednesday Night: Mostly clear in the evening and becoming mostly cloudy overnight with patchy fog. Lows 61 to 66.
Thursday: Mostly cloudy with patchy fog in the morning and Becoming mostly sunny. Highs 75 to 79 near the coast to 83 to 86 inland.
Thursday Night: Mostly clear in the evening and becoming mostly cloudy overnight with patchy fog. Lows 60 to 65.
Friday: Cloudy in the morning and becoming partly cloudy. Patchy fog in the morning. Highs 72 to 76 near the coast to 80 inland.
Friday Night: Mostly clear in the evening and becoming cloudy overnight with patchy fog. Lows 59 to 64.
Saturday: Cloudy with patchy fog in the morning and becoming mostly sunny. Highs 71 to 75 near the coast to 80 inland.
Saturday Night: Mostly clear in the evening and becoming mostly cloudy overnight with patchy fog. Lows 59 to 64.
Sunday: Mostly cloudy with patchy fog in the morning and becoming mostly sunny. Highs 72 to 75 near the coast to 80 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.