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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 28 2026 at 7:25 AM PDT | Next Issuance: | Oct 29 2026 at 9:00 AM PDT
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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: 10/28/2026 at 07:25 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/23/2026 at 04:00 PM PDT
# Maximum Observed Stage: 7.49 Feet
# Maximum Observed Flow: 35 cfs
#
# Earliest Date & Time of Maximum Forecast: 11/01/2026 at 09:00 PM PST
# Maximum Forecast Stage: 8.44 Feet
# Maximum Forecast Flow: 302 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
10/23/2026 07 AM PDT 7.17 0 Normal
10/23/2026 08 AM PDT 7.17 0 0 Normal
10/23/2026 09 AM PDT 7.17 0 0 Normal
10/23/2026 10 AM PDT 7.17 0 0 Normal
10/23/2026 11 AM PDT 7.34 15 + Normal
10/23/2026 12 PM PDT 7.42 24 + Normal
10/23/2026 01 PM PDT 7.45 29 + Normal
10/23/2026 02 PM PDT 7.48 33 + Normal
10/23/2026 03 PM PDT 7.49 35 + Normal
10/23/2026 04 PM PDT 7.49 35 0 Normal
10/23/2026 05 PM PDT 7.22 4 - Normal
10/23/2026 06 PM PDT 7.17 0 - Normal
10/23/2026 07 PM PDT 7.17 0 0 Normal
10/23/2026 08 PM PDT 7.17 0 0 Normal
10/23/2026 09 PM PDT 7.17 0 0 Normal
10/23/2026 10 PM PDT 7.17 0 0 Normal
10/23/2026 11 PM PDT 7.17 0 0 Normal
10/24/2026 12 AM PDT 7.17 0 0 Normal
10/24/2026 01 AM PDT 7.17 0 0 Normal
10/24/2026 02 AM PDT 7.17 0 0 Normal
10/24/2026 03 AM PDT 7.17 0 0 Normal
10/24/2026 04 AM PDT 7.17 0 0 Normal
10/24/2026 05 AM PDT 7.17 0 0 Normal
10/24/2026 06 AM PDT 7.17 0 0 Normal
10/24/2026 07 AM PDT 7.19 2 + Normal
10/24/2026 08 AM PDT 7.20 2 + Normal
10/24/2026 09 AM PDT 7.22 4 + Normal
10/24/2026 10 AM PDT 7.24 6 + Normal
10/24/2026 11 AM PDT 7.25 6 + Normal
10/24/2026 12 PM PDT 7.25 6 0 Normal
10/24/2026 01 PM PDT 7.27 8 + Normal
10/24/2026 02 PM PDT 7.27 8 0 Normal
10/24/2026 03 PM PDT 7.28 9 + Normal
10/24/2026 04 PM PDT 7.29 10 + Normal
10/24/2026 05 PM PDT 7.30 11 + Normal
10/24/2026 06 PM PDT 7.30 11 0 Normal
10/24/2026 07 PM PDT 7.31 12 + Normal
10/24/2026 08 PM PDT 7.31 12 0 Normal
10/24/2026 09 PM PDT 7.32 13 + Normal
10/24/2026 10 PM PDT 7.32 13 0 Normal
10/24/2026 11 PM PDT 7.32 13 0 Normal
10/25/2026 12 AM PDT 7.32 13 0 Normal
10/25/2026 01 AM PDT 7.33 14 + Normal
10/25/2026 02 AM PDT 7.33 14 0 Normal
10/25/2026 03 AM PDT 7.33 14 0 Normal
10/25/2026 04 AM PDT 7.33 14 0 Normal
10/25/2026 05 AM PDT 7.33 14 0 Normal
10/25/2026 06 AM PDT 7.33 14 0 Normal
10/25/2026 07 AM PDT 7.33 14 0 Normal
10/25/2026 08 AM PDT 7.32 13 - Normal
10/25/2026 09 AM PDT 7.26 7 - Normal
10/25/2026 10 AM PDT 7.21 3 - Normal
10/25/2026 11 AM PDT 7.19 2 - Normal
10/25/2026 12 PM PDT 7.19 2 0 Normal
10/25/2026 01 PM PDT 7.19 2 0 Normal
10/25/2026 02 PM PDT 7.19 2 0 Normal
10/25/2026 03 PM PDT 7.19 2 0 Normal
10/25/2026 04 PM PDT 7.20 2 + Normal
10/25/2026 05 PM PDT 7.20 2 0 Normal
10/25/2026 06 PM PDT 7.19 2 - Normal
10/25/2026 07 PM PDT 7.20 2 + Normal
10/25/2026 08 PM PDT 7.19 2 - Normal
10/25/2026 09 PM PDT 7.19 2 0 Normal
10/25/2026 10 PM PDT 7.19 2 0 Normal
10/25/2026 11 PM PDT 7.19 2 0 Normal
10/26/2026 12 AM PDT 7.20 2 + Normal
10/26/2026 01 AM PDT 7.19 2 - Normal
10/26/2026 02 AM PDT 7.19 2 0 Normal
10/26/2026 03 AM PDT 7.18 1 - Normal
10/26/2026 04 AM PDT 7.19 2 + Normal
10/26/2026 05 AM PDT 7.20 2 + Normal
10/26/2026 06 AM PDT 7.20 2 0 Normal
10/26/2026 07 AM PDT 7.20 2 0 Normal
10/26/2026 08 AM PDT 7.20 2 0 Normal
10/26/2026 09 AM PDT 7.19 2 - Normal
10/26/2026 10 AM PDT 7.18 1 - Normal
10/26/2026 11 AM PDT 7.20 2 + Normal
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
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
10/28/2026 08 AM PDT 7.18 1 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 7.18 1 0 Normal
10/28/2026 02 PM PDT 7.18 1 0 Normal
10/28/2026 03 PM PDT 7.18 1 0 Normal
10/28/2026 04 PM PDT 7.18 1 0 Normal
10/28/2026 05 PM PDT 7.18 1 0 Normal
10/28/2026 06 PM PDT 7.18 1 0 Normal
10/28/2026 07 PM PDT 7.18 1 0 Normal
10/28/2026 08 PM PDT 7.18 1 0 Normal
10/28/2026 09 PM PDT 7.18 1 0 Normal
10/28/2026 10 PM PDT 7.18 1 0 Normal
10/28/2026 11 PM PDT 7.18 1 0 Normal
10/29/2026 12 AM PDT 7.18 1 0 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 7.18 1 0 Normal
10/29/2026 11 AM PDT 7.18 1 0 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 7.18 1 0 Normal
10/30/2026 01 AM PDT 7.18 1 0 Normal
10/30/2026 02 AM PDT 7.18 1 0 Normal
10/30/2026 03 AM PDT 7.18 1 0 Normal
10/30/2026 04 AM PDT 7.18 1 0 Normal
10/30/2026 05 AM PDT 7.18 1 0 Normal
10/30/2026 06 AM PDT 7.18 1 0 Normal
10/30/2026 07 AM PDT 7.18 1 0 Normal
10/30/2026 08 AM PDT 7.18 1 0 Normal
10/30/2026 09 AM PDT 7.18 1 0 Normal
10/30/2026 10 AM PDT 7.18 1 0 Normal
10/30/2026 11 AM PDT 7.18 1 0 Normal
10/30/2026 12 PM PDT 7.18 1 0 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 7.18 1 0 Normal
10/31/2026 01 AM PDT 7.18 1 0 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 7.18 1 0 Normal
10/31/2026 06 AM PDT 7.18 1 0 Normal
10/31/2026 07 AM PDT 7.18 1 0 Normal
10/31/2026 08 AM PDT 7.18 1 0 Normal
10/31/2026 09 AM PDT 7.18 1 0 Normal
10/31/2026 10 AM PDT 7.18 1 0 Normal
10/31/2026 11 AM PDT 7.18 1 0 Normal
10/31/2026 12 PM PDT 7.18 1 0 Normal
10/31/2026 01 PM PDT 7.18 1 0 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 7.21 3 + Normal
11/01/2026 05 AM PST 7.25 6 + Normal
11/01/2026 06 AM PST 7.29 10 + Normal
11/01/2026 07 AM PST 7.34 15 + Normal
11/01/2026 08 AM PST 7.38 19 + Normal
11/01/2026 09 AM PST 7.44 27 + Normal
11/01/2026 10 AM PST 7.53 41 + Normal
11/01/2026 11 AM PST 7.66 65 + Normal
11/01/2026 12 PM PST 7.78 92 + Normal
11/01/2026 01 PM PST 7.89 120 + Normal
11/01/2026 02 PM PST 7.99 147 + Normal
11/01/2026 03 PM PST 8.07 172 + Normal
11/01/2026 04 PM PST 8.15 197 + Normal
11/01/2026 05 PM PST 8.23 224 + Normal
11/01/2026 06 PM PST 8.29 245 + Normal
11/01/2026 07 PM PST 8.36 271 + Normal
11/01/2026 08 PM PST 8.40 287 + Normal
11/01/2026 09 PM PST 8.44 302 + Normal
11/01/2026 10 PM PST 8.44 302 0 Normal
11/01/2026 11 PM PST 8.41 291 - Normal
11/02/2026 12 AM PST 8.37 275 - Normal
11/02/2026 01 AM PST 8.31 253 - Normal
11/02/2026 02 AM PST 8.26 235 - Normal
11/02/2026 03 AM PST 8.20 214 - Normal
11/02/2026 04 AM PST 8.13 191 - 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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