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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: | Apr 01 2026 at 1:21 PM PDT | Next Issuance: | Apr 02 2026 at 9:00 AM PDT
| |
| Action/Monitor: 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: 04/01/2026 at 01:21 PM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 03/27/2026 at 02:00 PM PDT
# Maximum Observed Stage: 7.23 Feet
# Maximum Observed Flow: 9 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/01/2026 at 02:00 PM PDT
# Maximum Forecast Stage: 7.14 Feet
# Maximum Forecast Flow: 5 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
03/27/2026 01 PM PDT 7.23 9 Normal
03/27/2026 02 PM PDT 7.23 9 0 Normal
03/27/2026 03 PM PDT 7.22 9 - Normal
03/27/2026 04 PM PDT 7.22 9 0 Normal
03/27/2026 05 PM PDT 7.21 8 - Normal
03/27/2026 06 PM PDT 7.21 8 0 Normal
03/27/2026 07 PM PDT 7.21 8 0 Normal
03/27/2026 08 PM PDT 7.22 9 + Normal
03/27/2026 09 PM PDT 7.21 8 - Normal
03/27/2026 10 PM PDT 7.21 8 0 Normal
03/27/2026 11 PM PDT 7.21 8 0 Normal
03/28/2026 12 AM PDT 7.21 8 0 Normal
03/28/2026 01 AM PDT 7.21 8 0 Normal
03/28/2026 02 AM PDT 7.21 8 0 Normal
03/28/2026 03 AM PDT 7.21 8 0 Normal
03/28/2026 04 AM PDT 7.21 8 0 Normal
03/28/2026 05 AM PDT 7.21 8 0 Normal
03/28/2026 06 AM PDT 7.21 8 0 Normal
03/28/2026 07 AM PDT 7.21 8 0 Normal
03/28/2026 08 AM PDT 7.21 8 0 Normal
03/28/2026 09 AM PDT 7.21 8 0 Normal
03/28/2026 10 AM PDT 7.20 8 - Normal
03/28/2026 11 AM PDT 7.20 8 0 Normal
03/28/2026 12 PM PDT 7.21 8 + Normal
03/28/2026 01 PM PDT 7.21 8 0 Normal
03/28/2026 02 PM PDT 7.21 8 0 Normal
03/28/2026 03 PM PDT 7.21 8 0 Normal
03/28/2026 04 PM PDT 7.21 8 0 Normal
03/28/2026 05 PM PDT 7.21 8 0 Normal
03/28/2026 06 PM PDT 7.20 8 - Normal
03/28/2026 07 PM PDT 7.20 8 0 Normal
03/28/2026 08 PM PDT 7.20 8 0 Normal
03/28/2026 09 PM PDT 7.20 8 0 Normal
03/28/2026 10 PM PDT 7.20 8 0 Normal
03/28/2026 11 PM PDT 7.20 8 0 Normal
03/29/2026 12 AM PDT 7.20 8 0 Normal
03/29/2026 01 AM PDT 7.20 8 0 Normal
03/29/2026 02 AM PDT 7.20 8 0 Normal
03/29/2026 03 AM PDT 7.19 7 - Normal
03/29/2026 04 AM PDT 7.19 7 0 Normal
03/29/2026 05 AM PDT 7.19 7 0 Normal
03/29/2026 06 AM PDT 7.18 7 - Normal
03/29/2026 07 AM PDT 7.18 7 0 Normal
03/29/2026 08 AM PDT 7.19 7 + Normal
03/29/2026 09 AM PDT 7.18 7 - Normal
03/29/2026 10 AM PDT 7.18 7 0 Normal
03/29/2026 11 AM PDT 7.19 7 + Normal
03/29/2026 12 PM PDT 7.17 6 - Normal
03/29/2026 01 PM PDT 7.16 6 - Normal
03/29/2026 02 PM PDT 7.16 6 0 Normal
03/29/2026 03 PM PDT 7.16 6 0 Normal
03/29/2026 04 PM PDT 7.17 6 + Normal
03/29/2026 05 PM PDT 7.17 6 0 Normal
03/29/2026 06 PM PDT 7.16 6 - Normal
03/29/2026 07 PM PDT 7.16 6 0 Normal
03/29/2026 08 PM PDT 7.16 6 0 Normal
03/29/2026 09 PM PDT 7.16 6 0 Normal
03/29/2026 10 PM PDT 7.19 7 + Normal
03/29/2026 11 PM PDT 7.16 6 - Normal
03/30/2026 12 AM PDT 7.18 7 + Normal
03/30/2026 01 AM PDT 7.17 6 - Normal
03/30/2026 02 AM PDT 7.15 6 - Normal
03/30/2026 03 AM PDT 7.15 6 0 Normal
03/30/2026 04 AM PDT 7.15 6 0 Normal
03/30/2026 05 AM PDT 7.15 6 0 Normal
03/30/2026 06 AM PDT 7.15 6 0 Normal
03/30/2026 07 AM PDT 7.15 6 0 Normal
03/30/2026 08 AM PDT 7.15 6 0 Normal
03/30/2026 09 AM PDT 7.16 6 + Normal
03/30/2026 10 AM PDT 7.15 6 - Normal
03/30/2026 11 AM PDT 7.15 6 0 Normal
03/30/2026 12 PM PDT 7.14 5 - Normal
03/30/2026 01 PM PDT 7.14 5 0 Normal
03/30/2026 02 PM PDT 7.16 6 + Normal
03/30/2026 03 PM PDT 7.17 6 + Normal
03/30/2026 04 PM PDT 7.16 6 - Normal
03/30/2026 05 PM PDT 7.14 5 - Normal
03/30/2026 06 PM PDT 7.14 5 0 Normal
03/30/2026 07 PM PDT 7.15 6 + Normal
03/30/2026 08 PM PDT 7.15 6 0 Normal
03/30/2026 09 PM PDT 7.15 6 0 Normal
03/30/2026 10 PM PDT 7.15 6 0 Normal
03/30/2026 11 PM PDT 7.15 6 0 Normal
03/31/2026 12 AM PDT 7.18 7 + Normal
03/31/2026 01 AM PDT 7.15 6 - Normal
03/31/2026 02 AM PDT 7.16 6 + Normal
03/31/2026 03 AM PDT 7.15 6 - Normal
03/31/2026 04 AM PDT 7.15 6 0 Normal
03/31/2026 05 AM PDT 7.16 6 + Normal
03/31/2026 06 AM PDT 7.16 6 0 Normal
03/31/2026 07 AM PDT 7.14 5 - Normal
03/31/2026 08 AM PDT 7.16 6 + Normal
03/31/2026 09 AM PDT 7.15 6 - Normal
03/31/2026 10 AM PDT 7.15 6 0 Normal
03/31/2026 11 AM PDT 7.16 6 + Normal
03/31/2026 12 PM PDT 7.16 6 0 Normal
03/31/2026 01 PM PDT 7.16 6 0 Normal
03/31/2026 02 PM PDT 7.14 5 - Normal
03/31/2026 03 PM PDT 7.16 6 + Normal
03/31/2026 04 PM PDT 7.17 6 + Normal
03/31/2026 05 PM PDT 7.15 6 - Normal
03/31/2026 06 PM PDT 7.14 5 - Normal
03/31/2026 07 PM PDT 7.14 5 0 Normal
03/31/2026 08 PM PDT 7.16 6 + Normal
03/31/2026 09 PM PDT 7.17 6 + Normal
03/31/2026 10 PM PDT 7.15 6 - Normal
03/31/2026 11 PM PDT 7.14 5 - Normal
04/01/2026 12 AM PDT 7.19 7 + Normal
04/01/2026 01 AM PDT 7.15 6 - Normal
04/01/2026 02 AM PDT 7.15 6 0 Normal
04/01/2026 03 AM PDT 7.14 5 - Normal
04/01/2026 04 AM PDT 7.14 5 0 Normal
04/01/2026 05 AM PDT 7.14 5 0 Normal
04/01/2026 06 AM PDT 7.14 5 0 Normal
04/01/2026 07 AM PDT 7.14 5 0 Normal
04/01/2026 08 AM PDT 7.14 5 0 Normal
04/01/2026 09 AM PDT 7.11 4 - Normal
04/01/2026 10 AM PDT 7.11 4 0 Normal
04/01/2026 11 AM PDT 7.14 5 + Normal
04/01/2026 12 PM PDT 7.14 5 0 Normal
04/01/2026 01 PM PDT 7.14 5 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/01/2026 02 PM PDT 7.14 5 Normal
04/01/2026 03 PM PDT 7.14 5 0 Normal
04/01/2026 04 PM PDT 7.13 5 - Normal
04/01/2026 05 PM PDT 7.14 5 + Normal
04/01/2026 06 PM PDT 7.14 5 0 Normal
04/01/2026 07 PM PDT 7.13 5 - Normal
04/01/2026 08 PM PDT 7.13 5 0 Normal
04/01/2026 09 PM PDT 7.14 5 + Normal
04/01/2026 10 PM PDT 7.14 5 0 Normal
04/01/2026 11 PM PDT 7.13 5 - Normal
04/02/2026 12 AM PDT 7.12 5 - Normal
04/02/2026 01 AM PDT 7.10 4 - Normal
04/02/2026 02 AM PDT 7.07 3 - Normal
04/02/2026 03 AM PDT 7.05 3 - Normal
04/02/2026 04 AM PDT 7.03 2 - Normal
04/02/2026 05 AM PDT 7.01 1 - Normal
04/02/2026 06 AM PDT 6.99 1 - Normal
04/02/2026 07 AM PDT 6.98 0 - Normal
04/02/2026 08 AM PDT 6.97 0 - Normal
04/02/2026 09 AM PDT 6.97 0 0 Normal
04/02/2026 10 AM PDT 6.97 0 0 Normal
04/02/2026 11 AM PDT 6.97 0 0 Normal
04/02/2026 12 PM PDT 6.97 0 0 Normal
04/02/2026 01 PM PDT 6.97 0 0 Normal
04/02/2026 02 PM PDT 6.97 0 0 Normal
04/02/2026 03 PM PDT 6.97 0 0 Normal
04/02/2026 04 PM PDT 6.97 0 0 Normal
04/02/2026 05 PM PDT 6.97 0 0 Normal
04/02/2026 06 PM PDT 6.97 0 0 Normal
04/02/2026 07 PM PDT 6.97 0 0 Normal
04/02/2026 08 PM PDT 6.97 0 0 Normal
04/02/2026 09 PM PDT 6.97 0 0 Normal
04/02/2026 10 PM PDT 6.97 0 0 Normal
04/02/2026 11 PM PDT 6.97 0 0 Normal
04/03/2026 12 AM PDT 6.97 0 0 Normal
04/03/2026 01 AM PDT 6.97 0 0 Normal
04/03/2026 02 AM PDT 6.97 0 0 Normal
04/03/2026 03 AM PDT 6.97 0 0 Normal
04/03/2026 04 AM PDT 6.97 0 0 Normal
04/03/2026 05 AM PDT 6.97 0 0 Normal
04/03/2026 06 AM PDT 6.97 0 0 Normal
04/03/2026 07 AM PDT 6.97 0 0 Normal
04/03/2026 08 AM PDT 6.97 0 0 Normal
04/03/2026 09 AM PDT 6.97 0 0 Normal
04/03/2026 10 AM PDT 6.97 0 0 Normal
04/03/2026 11 AM PDT 6.97 0 0 Normal
04/03/2026 12 PM PDT 6.97 0 0 Normal
04/03/2026 01 PM PDT 6.97 0 0 Normal
04/03/2026 02 PM PDT 6.97 0 0 Normal
04/03/2026 03 PM PDT 6.97 0 0 Normal
04/03/2026 04 PM PDT 6.97 0 0 Normal
04/03/2026 05 PM PDT 6.97 0 0 Normal
04/03/2026 06 PM PDT 6.97 0 0 Normal
04/03/2026 07 PM PDT 6.97 0 0 Normal
04/03/2026 08 PM PDT 6.97 0 0 Normal
04/03/2026 09 PM PDT 6.97 0 0 Normal
04/03/2026 10 PM PDT 6.97 0 0 Normal
04/03/2026 11 PM PDT 6.97 0 0 Normal
04/04/2026 12 AM PDT 6.97 0 0 Normal
04/04/2026 01 AM PDT 6.97 0 0 Normal
04/04/2026 02 AM PDT 6.97 0 0 Normal
04/04/2026 03 AM PDT 6.97 0 0 Normal
04/04/2026 04 AM PDT 6.97 0 0 Normal
04/04/2026 05 AM PDT 6.97 0 0 Normal
04/04/2026 06 AM PDT 6.97 0 0 Normal
04/04/2026 07 AM PDT 6.97 0 0 Normal
04/04/2026 08 AM PDT 6.97 0 0 Normal
04/04/2026 09 AM PDT 6.97 0 0 Normal
04/04/2026 10 AM PDT 6.97 0 0 Normal
04/04/2026 11 AM PDT 6.97 0 0 Normal
04/04/2026 12 PM PDT 6.97 0 0 Normal
04/04/2026 01 PM PDT 6.97 0 0 Normal
04/04/2026 02 PM PDT 6.97 0 0 Normal
04/04/2026 03 PM PDT 6.97 0 0 Normal
04/04/2026 04 PM PDT 6.97 0 0 Normal
04/04/2026 05 PM PDT 6.97 0 0 Normal
04/04/2026 06 PM PDT 6.97 0 0 Normal
04/04/2026 07 PM PDT 6.97 0 0 Normal
04/04/2026 08 PM PDT 6.97 0 0 Normal
04/04/2026 09 PM PDT 6.97 0 0 Normal
04/04/2026 10 PM PDT 6.97 0 0 Normal
04/04/2026 11 PM PDT 6.97 0 0 Normal
04/05/2026 12 AM PDT 6.97 0 0 Normal
04/05/2026 01 AM PDT 6.97 0 0 Normal
04/05/2026 02 AM PDT 6.97 0 0 Normal
04/05/2026 03 AM PDT 6.97 0 0 Normal
04/05/2026 04 AM PDT 6.97 0 0 Normal
04/05/2026 05 AM PDT 6.97 0 0 Normal
04/05/2026 06 AM PDT 6.97 0 0 Normal
04/05/2026 07 AM PDT 6.97 0 0 Normal
04/05/2026 08 AM PDT 6.97 0 0 Normal
04/05/2026 09 AM PDT 6.97 0 0 Normal
04/05/2026 10 AM PDT 6.97 0 0 Normal
04/05/2026 11 AM PDT 6.97 0 0 Normal
04/05/2026 12 PM PDT 6.97 0 0 Normal
04/05/2026 01 PM PDT 6.97 0 0 Normal
04/05/2026 02 PM PDT 6.97 0 0 Normal
04/05/2026 03 PM PDT 6.97 0 0 Normal
04/05/2026 04 PM PDT 6.97 0 0 Normal
04/05/2026 05 PM PDT 6.97 0 0 Normal
04/05/2026 06 PM PDT 6.97 0 0 Normal
04/05/2026 07 PM PDT 6.97 0 0 Normal
04/05/2026 08 PM PDT 6.97 0 0 Normal
04/05/2026 09 PM PDT 6.97 0 0 Normal
04/05/2026 10 PM PDT 6.97 0 0 Normal
04/05/2026 11 PM PDT 6.97 0 0 Normal
04/06/2026 12 AM PDT 6.97 0 0 Normal
04/06/2026 01 AM PDT 6.97 0 0 Normal
04/06/2026 02 AM PDT 6.97 0 0 Normal
04/06/2026 03 AM PDT 6.97 0 0 Normal
04/06/2026 04 AM PDT 6.97 0 0 Normal
04/06/2026 05 AM PDT 6.97 0 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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