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SANTA MARGARITA RIVER - YSIDORA (YDRC1)
| Latitude: 33.31º N | Longitude: 117.35º W | Elevation: 75 Feet | | Forecast Type: Official Location |
| Location: San Diego County in California | Bulletin Group: Southern California | River Group: San Diego/Inland |
| Issuance Time: | Oct 31 2026 at 12:18 PM PDT | Next Issuance: | Nov 01 2026 at 9:00 AM PST
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| Action: 10.85 Feet | Minor Flood: 12.5 Feet | Moderate Flood: 13.78 Feet | Major Flood: 16.29 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Santa Margarita River - Ysidora (YDRC1)
#
# File Generation Time: 10/31/2026 at 12:18 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/31/2026 at 09:00 AM PDT
# Maximum Observed Stage: 7.19 Feet
# Maximum Observed Flow: 2 cfs
#
# Earliest Date & Time of Maximum Forecast: 11/01/2026 at 06:00 PM PST
# Maximum Forecast Stage: 8.40 Feet
# Maximum Forecast Flow: 287 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
10/26/2026 12 PM PDT 7.19 2 Normal
10/26/2026 01 PM PDT 7.19 2 0 Normal
10/26/2026 02 PM PDT 7.18 1 - Normal
10/26/2026 03 PM PDT 7.19 2 + Normal
10/26/2026 04 PM PDT 7.19 2 0 Normal
10/26/2026 05 PM PDT 7.18 1 - Normal
10/26/2026 06 PM PDT 7.18 1 0 Normal
10/26/2026 07 PM PDT 7.18 1 0 Normal
10/26/2026 08 PM PDT 7.19 2 + Normal
10/26/2026 09 PM PDT 7.19 2 0 Normal
10/26/2026 10 PM PDT 7.19 2 0 Normal
10/26/2026 11 PM PDT 7.19 2 0 Normal
10/27/2026 12 AM PDT 7.19 2 0 Normal
10/27/2026 01 AM PDT 7.18 1 - Normal
10/27/2026 02 AM PDT 7.19 2 + Normal
10/27/2026 03 AM PDT 7.19 2 0 Normal
10/27/2026 04 AM PDT 7.19 2 0 Normal
10/27/2026 05 AM PDT 7.19 2 0 Normal
10/27/2026 06 AM PDT 7.19 2 0 Normal
10/27/2026 07 AM PDT 7.19 2 0 Normal
10/27/2026 08 AM PDT 7.18 1 - Normal
10/27/2026 09 AM PDT 7.19 2 + Normal
10/27/2026 10 AM PDT 7.19 2 0 Normal
10/27/2026 11 AM PDT 7.19 2 0 Normal
10/27/2026 12 PM PDT 7.19 2 0 Normal
10/27/2026 01 PM PDT 7.19 2 0 Normal
10/27/2026 02 PM PDT 7.18 1 - Normal
10/27/2026 03 PM PDT 7.18 1 0 Normal
10/27/2026 04 PM PDT 7.17 0 - Normal
10/27/2026 05 PM PDT 7.17 0 0 Normal
10/27/2026 06 PM PDT 7.17 0 0 Normal
10/27/2026 07 PM PDT 7.17 0 0 Normal
10/27/2026 08 PM PDT 7.17 0 0 Normal
10/27/2026 09 PM PDT 7.18 1 + Normal
10/27/2026 10 PM PDT 7.18 1 0 Normal
10/27/2026 11 PM PDT 7.18 1 0 Normal
10/28/2026 12 AM PDT 7.18 1 0 Normal
10/28/2026 01 AM PDT 7.18 1 0 Normal
10/28/2026 02 AM PDT 7.18 1 0 Normal
10/28/2026 03 AM PDT 7.18 1 0 Normal
10/28/2026 04 AM PDT 7.18 1 0 Normal
10/28/2026 05 AM PDT 7.18 1 0 Normal
10/28/2026 06 AM PDT 7.18 1 0 Normal
10/28/2026 07 AM PDT 7.18 1 0 Normal
10/28/2026 08 AM PDT 7.18 1 0 Normal
10/28/2026 09 AM PDT 7.18 1 0 Normal
10/28/2026 10 AM PDT 7.18 1 0 Normal
10/28/2026 11 AM PDT 7.18 1 0 Normal
10/28/2026 12 PM PDT 7.18 1 0 Normal
10/28/2026 01 PM PDT 7.17 0 - Normal
10/28/2026 02 PM PDT 7.17 0 0 Normal
10/28/2026 03 PM PDT 7.17 0 0 Normal
10/28/2026 04 PM PDT 7.17 0 0 Normal
10/28/2026 05 PM PDT 7.17 0 0 Normal
10/28/2026 06 PM PDT 7.17 0 0 Normal
10/28/2026 07 PM PDT 7.17 0 0 Normal
10/28/2026 08 PM PDT 7.17 0 0 Normal
10/28/2026 09 PM PDT 7.17 0 0 Normal
10/28/2026 10 PM PDT 7.17 0 0 Normal
10/28/2026 11 PM PDT 7.17 0 0 Normal
10/29/2026 12 AM PDT 7.18 1 + Normal
10/29/2026 01 AM PDT 7.18 1 0 Normal
10/29/2026 02 AM PDT 7.18 1 0 Normal
10/29/2026 03 AM PDT 7.18 1 0 Normal
10/29/2026 04 AM PDT 7.18 1 0 Normal
10/29/2026 05 AM PDT 7.18 1 0 Normal
10/29/2026 06 AM PDT 7.18 1 0 Normal
10/29/2026 07 AM PDT 7.18 1 0 Normal
10/29/2026 08 AM PDT 7.18 1 0 Normal
10/29/2026 09 AM PDT 7.18 1 0 Normal
10/29/2026 10 AM PDT 7.17 0 - Normal
10/29/2026 11 AM PDT 7.18 1 + Normal
10/29/2026 12 PM PDT 7.18 1 0 Normal
10/29/2026 01 PM PDT 7.18 1 0 Normal
10/29/2026 02 PM PDT 7.18 1 0 Normal
10/29/2026 03 PM PDT 7.18 1 0 Normal
10/29/2026 04 PM PDT 7.18 1 0 Normal
10/29/2026 05 PM PDT 7.18 1 0 Normal
10/29/2026 06 PM PDT 7.18 1 0 Normal
10/29/2026 07 PM PDT 7.18 1 0 Normal
10/29/2026 08 PM PDT 7.18 1 0 Normal
10/29/2026 09 PM PDT 7.18 1 0 Normal
10/29/2026 10 PM PDT 7.18 1 0 Normal
10/29/2026 11 PM PDT 7.18 1 0 Normal
10/30/2026 12 AM PDT 7.19 2 + Normal
10/30/2026 01 AM PDT 7.19 2 0 Normal
10/30/2026 02 AM PDT 7.18 1 - Normal
10/30/2026 03 AM PDT 7.19 2 + Normal
10/30/2026 04 AM PDT 7.19 2 0 Normal
10/30/2026 05 AM PDT 7.19 2 0 Normal
10/30/2026 06 AM PDT 7.19 2 0 Normal
10/30/2026 07 AM PDT 7.18 1 - Normal
10/30/2026 08 AM PDT 7.19 2 + Normal
10/30/2026 09 AM PDT 7.19 2 0 Normal
10/30/2026 10 AM PDT 7.19 2 0 Normal
10/30/2026 11 AM PDT 7.19 2 0 Normal
10/30/2026 12 PM PDT 7.18 1 - Normal
10/30/2026 01 PM PDT 7.18 1 0 Normal
10/30/2026 02 PM PDT 7.18 1 0 Normal
10/30/2026 03 PM PDT 7.18 1 0 Normal
10/30/2026 04 PM PDT 7.18 1 0 Normal
10/30/2026 05 PM PDT 7.18 1 0 Normal
10/30/2026 06 PM PDT 7.18 1 0 Normal
10/30/2026 07 PM PDT 7.18 1 0 Normal
10/30/2026 08 PM PDT 7.18 1 0 Normal
10/30/2026 09 PM PDT 7.18 1 0 Normal
10/30/2026 10 PM PDT 7.18 1 0 Normal
10/30/2026 11 PM PDT 7.18 1 0 Normal
10/31/2026 12 AM PDT 7.19 2 + Normal
10/31/2026 01 AM PDT 7.18 1 - Normal
10/31/2026 02 AM PDT 7.18 1 0 Normal
10/31/2026 03 AM PDT 7.18 1 0 Normal
10/31/2026 04 AM PDT 7.18 1 0 Normal
10/31/2026 05 AM PDT 7.19 2 + Normal
10/31/2026 06 AM PDT 7.18 1 - Normal
10/31/2026 07 AM PDT 7.19 2 + Normal
10/31/2026 08 AM PDT 7.19 2 0 Normal
10/31/2026 09 AM PDT 7.19 2 0 Normal
10/31/2026 10 AM PDT 7.18 1 - Normal
10/31/2026 11 AM PDT 7.18 1 0 Normal
10/31/2026 12 PM PDT 7.18 1 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
10/31/2026 01 PM PDT 7.18 1 Normal
10/31/2026 02 PM PDT 7.18 1 0 Normal
10/31/2026 03 PM PDT 7.18 1 0 Normal
10/31/2026 04 PM PDT 7.18 1 0 Normal
10/31/2026 05 PM PDT 7.18 1 0 Normal
10/31/2026 06 PM PDT 7.18 1 0 Normal
10/31/2026 07 PM PDT 7.18 1 0 Normal
10/31/2026 08 PM PDT 7.18 1 0 Normal
10/31/2026 09 PM PDT 7.18 1 0 Normal
10/31/2026 10 PM PDT 7.18 1 0 Normal
10/31/2026 11 PM PDT 7.18 1 0 Normal
11/01/2026 12 AM PDT 7.18 1 0 Normal
11/01/2026 01 AM PDT 7.18 1 0 Normal
11/01/2026 01 AM PST 7.18 1 0 Normal
11/01/2026 02 AM PST 7.18 1 0 Normal
11/01/2026 03 AM PST 7.18 1 0 Normal
11/01/2026 04 AM PST 7.18 1 0 Normal
11/01/2026 05 AM PST 7.19 2 + Normal
11/01/2026 06 AM PST 7.23 5 + Normal
11/01/2026 07 AM PST 7.31 12 + Normal
11/01/2026 08 AM PST 7.42 24 + Normal
11/01/2026 09 AM PST 7.54 43 + Normal
11/01/2026 10 AM PST 7.65 63 + Normal
11/01/2026 11 AM PST 7.75 85 + Normal
11/01/2026 12 PM PST 7.87 114 + Normal
11/01/2026 01 PM PST 7.99 147 + Normal
11/01/2026 02 PM PST 8.13 191 + Normal
11/01/2026 03 PM PST 8.26 235 + Normal
11/01/2026 04 PM PST 8.34 264 + Normal
11/01/2026 05 PM PST 8.39 283 + Normal
11/01/2026 06 PM PST 8.40 287 + Normal
11/01/2026 07 PM PST 8.38 279 - Normal
11/01/2026 08 PM PST 8.33 260 - Normal
11/01/2026 09 PM PST 8.28 242 - Normal
11/01/2026 10 PM PST 8.24 228 - Normal
11/01/2026 11 PM PST 8.19 210 - Normal
11/02/2026 12 AM PST 8.13 191 - Normal
11/02/2026 01 AM PST 8.06 168 - Normal
11/02/2026 02 AM PST 8.00 150 - Normal
11/02/2026 03 AM PST 7.92 128 - Normal
11/02/2026 04 AM PST 7.86 112 - Normal
11/02/2026 05 AM PST 7.79 94 - Normal
11/02/2026 06 AM PST 7.73 80 - Normal
11/02/2026 07 AM PST 7.67 67 - Normal
11/02/2026 08 AM PST 7.62 57 - Normal
11/02/2026 09 AM PST 7.57 48 - Normal
11/02/2026 10 AM PST 7.52 39 - Normal
11/02/2026 11 AM PST 7.48 33 - Normal
11/02/2026 12 PM PST 7.44 27 - Normal
11/02/2026 01 PM PST 7.41 23 - Normal
11/02/2026 02 PM PST 7.38 19 - Normal
11/02/2026 03 PM PST 7.35 16 - Normal
11/02/2026 04 PM PST 7.33 14 - Normal
11/02/2026 05 PM PST 7.30 11 - Normal
11/02/2026 06 PM PST 7.29 10 - Normal
11/02/2026 07 PM PST 7.27 8 - Normal
11/02/2026 08 PM PST 7.25 6 - Normal
11/02/2026 09 PM PST 7.24 6 - Normal
11/02/2026 10 PM PST 7.23 5 - Normal
11/02/2026 11 PM PST 7.22 4 - Normal
11/03/2026 12 AM PST 7.22 4 0 Normal
11/03/2026 01 AM PST 7.21 3 - Normal
11/03/2026 02 AM PST 7.21 3 0 Normal
11/03/2026 03 AM PST 7.20 2 - Normal
11/03/2026 04 AM PST 7.20 2 0 Normal
11/03/2026 05 AM PST 7.20 2 0 Normal
11/03/2026 06 AM PST 7.20 2 0 Normal
11/03/2026 07 AM PST 7.20 2 0 Normal
11/03/2026 08 AM PST 7.19 2 - Normal
11/03/2026 09 AM PST 7.19 2 0 Normal
11/03/2026 10 AM PST 7.19 2 0 Normal
11/03/2026 11 AM PST 7.19 2 0 Normal
11/03/2026 12 PM PST 7.19 2 0 Normal
11/03/2026 01 PM PST 7.19 2 0 Normal
11/03/2026 02 PM PST 7.19 2 0 Normal
11/03/2026 03 PM PST 7.19 2 0 Normal
11/03/2026 04 PM PST 7.18 1 - Normal
11/03/2026 05 PM PST 7.18 1 0 Normal
11/03/2026 06 PM PST 7.18 1 0 Normal
11/03/2026 07 PM PST 7.18 1 0 Normal
11/03/2026 08 PM PST 7.18 1 0 Normal
11/03/2026 09 PM PST 7.18 1 0 Normal
11/03/2026 10 PM PST 7.18 1 0 Normal
11/03/2026 11 PM PST 7.18 1 0 Normal
11/04/2026 12 AM PST 7.18 1 0 Normal
11/04/2026 01 AM PST 7.18 1 0 Normal
11/04/2026 02 AM PST 7.18 1 0 Normal
11/04/2026 03 AM PST 7.18 1 0 Normal
11/04/2026 04 AM PST 7.18 1 0 Normal
11/04/2026 05 AM PST 7.18 1 0 Normal
11/04/2026 06 AM PST 7.18 1 0 Normal
11/04/2026 07 AM PST 7.18 1 0 Normal
11/04/2026 08 AM PST 7.18 1 0 Normal
11/04/2026 09 AM PST 7.18 1 0 Normal
11/04/2026 10 AM PST 7.18 1 0 Normal
11/04/2026 11 AM PST 7.18 1 0 Normal
11/04/2026 12 PM PST 7.18 1 0 Normal
11/04/2026 01 PM PST 7.18 1 0 Normal
11/04/2026 02 PM PST 7.18 1 0 Normal
11/04/2026 03 PM PST 7.18 1 0 Normal
11/04/2026 04 PM PST 7.18 1 0 Normal
11/04/2026 05 PM PST 7.18 1 0 Normal
11/04/2026 06 PM PST 7.18 1 0 Normal
11/04/2026 07 PM PST 7.18 1 0 Normal
11/04/2026 08 PM PST 7.18 1 0 Normal
11/04/2026 09 PM PST 7.18 1 0 Normal
11/04/2026 10 PM PST 7.18 1 0 Normal
11/04/2026 11 PM PST 7.18 1 0 Normal
11/05/2026 12 AM PST 7.18 1 0 Normal
11/05/2026 01 AM PST 7.18 1 0 Normal
11/05/2026 02 AM PST 7.18 1 0 Normal
11/05/2026 03 AM PST 7.18 1 0 Normal
11/05/2026 04 AM PST 7.18 1 0 Normal
#
# NOTE 1: Stages are rounded to the nearest hundredth (.01) of a foot.
# NOTE 2: Flows are rounded to the nearest (1) cfs.
# NOTE 3: Trends are determined using hourly change in unrounded stage and flow.
# NOTE 4: Maximum Values are determined using unrounded stage and flow.
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