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SANTA MARGARITA RIVER - 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: | Jan 02 2026 at 1:34 PM PST | Next Issuance: | Jan 03 2026 at 9:00 AM PST
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| 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: 01/02/2026 at 01:34 PM PST
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 01/01/2026 at 07:00 PM PST
# Maximum Observed Stage: 10.26 Feet
# Maximum Observed Flow: 2268 cfs
#
# Earliest Date & Time of Maximum Forecast: 01/05/2026 at 01:00 AM PST
# Maximum Forecast Stage: 8.69 Feet
# Maximum Forecast Flow: 508 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
12/28/2025 01 PM PST 7.66 104 Normal
12/28/2025 02 PM PST 7.66 104 0 Normal
12/28/2025 03 PM PST 7.65 102 - Normal
12/28/2025 04 PM PST 7.63 98 - Normal
12/28/2025 05 PM PST 7.62 96 - Normal
12/28/2025 06 PM PST 7.62 96 0 Normal
12/28/2025 07 PM PST 7.61 94 - Normal
12/28/2025 08 PM PST 7.59 91 - Normal
12/28/2025 09 PM PST 7.52 78 - Normal
12/28/2025 10 PM PST 7.50 74 - Normal
12/28/2025 11 PM PST 7.48 71 - Normal
12/29/2025 12 AM PST 7.46 68 - Normal
12/29/2025 01 AM PST 7.44 65 - Normal
12/29/2025 02 AM PST 7.44 65 0 Normal
12/29/2025 03 AM PST 7.43 63 - Normal
12/29/2025 04 AM PST 7.43 63 0 Normal
12/29/2025 05 AM PST 7.43 63 0 Normal
12/29/2025 06 AM PST 7.42 62 - Normal
12/29/2025 07 AM PST 7.42 62 0 Normal
12/29/2025 08 AM PST 7.43 63 + Normal
12/29/2025 09 AM PST 7.45 66 + Normal
12/29/2025 10 AM PST 7.43 63 - Normal
12/29/2025 11 AM PST 7.44 65 + Normal
12/29/2025 12 PM PST 7.41 60 - Normal
12/29/2025 01 PM PST 7.43 63 + Normal
12/29/2025 02 PM PST 7.43 63 0 Normal
12/29/2025 03 PM PST 7.42 62 - Normal
12/29/2025 04 PM PST 7.42 62 0 Normal
12/29/2025 05 PM PST 7.42 62 0 Normal
12/29/2025 06 PM PST 7.43 63 + Normal
12/29/2025 07 PM PST 7.41 60 - Normal
12/29/2025 08 PM PST 7.41 60 0 Normal
12/29/2025 09 PM PST 7.40 59 - Normal
12/29/2025 10 PM PST 7.39 57 - Normal
12/29/2025 11 PM PST 7.40 59 + Normal
12/30/2025 12 AM PST 7.39 57 - Normal
12/30/2025 01 AM PST 7.39 57 0 Normal
12/30/2025 02 AM PST 7.39 57 0 Normal
12/30/2025 03 AM PST 7.40 59 + Normal
12/30/2025 04 AM PST 7.39 57 - Normal
12/30/2025 05 AM PST 7.39 57 0 Normal
12/30/2025 06 AM PST 7.38 56 - Normal
12/30/2025 07 AM PST 7.38 56 0 Normal
12/30/2025 08 AM PST 7.37 54 - Normal
12/30/2025 09 AM PST 7.38 56 + Normal
12/30/2025 10 AM PST 7.38 56 0 Normal
12/30/2025 11 AM PST 7.37 54 - Normal
12/30/2025 12 PM PST 7.37 54 0 Normal
12/30/2025 01 PM PST 7.37 54 0 Normal
12/30/2025 02 PM PST 7.36 53 - Normal
12/30/2025 03 PM PST 7.36 53 0 Normal
12/30/2025 04 PM PST 7.36 53 0 Normal
12/30/2025 05 PM PST 7.37 54 + Normal
12/30/2025 06 PM PST 7.35 51 - Normal
12/30/2025 07 PM PST 7.35 51 0 Normal
12/30/2025 08 PM PST 7.34 50 - Normal
12/30/2025 09 PM PST 7.33 49 - Normal
12/30/2025 10 PM PST 7.32 47 - Normal
12/30/2025 11 PM PST 7.35 51 + Normal
12/31/2025 12 AM PST 7.34 50 - Normal
12/31/2025 01 AM PST 7.34 50 0 Normal
12/31/2025 02 AM PST 7.33 49 - Normal
12/31/2025 03 AM PST 7.32 47 - Normal
12/31/2025 04 AM PST 7.31 46 - Normal
12/31/2025 05 AM PST 7.29 43 - Normal
12/31/2025 06 AM PST 7.34 50 + Normal
12/31/2025 07 AM PST 7.33 49 - Normal
12/31/2025 08 AM PST 7.33 49 0 Normal
12/31/2025 09 AM PST 7.31 46 - Normal
12/31/2025 10 AM PST 7.25 39 - Normal
12/31/2025 11 AM PST 7.25 39 0 Normal
12/31/2025 12 PM PST 7.27 41 + Normal
12/31/2025 01 PM PST 7.28 42 + Normal
12/31/2025 02 PM PST 7.28 42 0 Normal
12/31/2025 03 PM PST 7.28 42 0 Normal
12/31/2025 04 PM PST 7.29 43 + Normal
12/31/2025 05 PM PST 7.28 42 - Normal
12/31/2025 06 PM PST 7.25 39 - Normal
12/31/2025 07 PM PST 7.26 40 + Normal
12/31/2025 08 PM PST 7.26 40 0 Normal
12/31/2025 09 PM PST 7.23 36 - Normal
12/31/2025 10 PM PST 7.27 41 + Normal
12/31/2025 11 PM PST 7.27 41 0 Normal
01/01/2026 12 AM PST 7.24 37 - Normal
01/01/2026 01 AM PST 7.27 41 + Normal
01/01/2026 02 AM PST 7.28 42 + Normal
01/01/2026 03 AM PST 7.27 41 - Normal
01/01/2026 04 AM PST 7.30 45 + Normal
01/01/2026 05 AM PST 7.28 42 - Normal
01/01/2026 06 AM PST 7.27 41 - Normal
01/01/2026 07 AM PST 7.27 41 0 Normal
01/01/2026 08 AM PST 7.30 45 + Normal
01/01/2026 09 AM PST 7.30 45 0 Normal
01/01/2026 10 AM PST 7.29 43 - Normal
01/01/2026 11 AM PST 7.28 42 - Normal
01/01/2026 12 PM PST 7.27 41 - Normal
01/01/2026 01 PM PST 7.28 42 + Normal
01/01/2026 02 PM PST 7.91 171 + Normal
01/01/2026 03 PM PST 8.71 519 + Normal
01/01/2026 04 PM PST 9.25 930 + Normal
01/01/2026 05 PM PST 9.82 1590 + Normal
01/01/2026 06 PM PST 10.20 2166 + Normal
01/01/2026 07 PM PST 10.26 2268 + Normal
01/01/2026 08 PM PST 10.13 2051 - Normal
01/01/2026 09 PM PST 9.84 1617 - Normal
01/01/2026 10 PM PST 9.61 1320 - Normal
01/01/2026 11 PM PST 9.41 1092 - Normal
01/02/2026 12 AM PST 9.24 920 - Normal
01/02/2026 01 AM PST 9.12 810 - Normal
01/02/2026 02 AM PST 9.03 734 - Normal
01/02/2026 03 AM PST 8.96 678 - Normal
01/02/2026 04 AM PST 8.89 630 - Normal
01/02/2026 05 AM PST 8.81 579 - Normal
01/02/2026 06 AM PST 8.76 549 - Normal
01/02/2026 07 AM PST 8.68 502 - Normal
01/02/2026 08 AM PST 8.62 468 - Normal
01/02/2026 09 AM PST 8.45 381 - Normal
01/02/2026 10 AM PST 8.33 326 - Normal
01/02/2026 11 AM PST 8.23 284 - Normal
01/02/2026 12 PM PST 8.19 268 - Normal
01/02/2026 01 PM PST 8.16 256 - Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
01/02/2026 02 PM PST 8.16 256 Normal
01/02/2026 03 PM PST 8.16 256 0 Normal
01/02/2026 04 PM PST 8.16 256 0 Normal
01/02/2026 05 PM PST 8.18 264 + Normal
01/02/2026 06 PM PST 8.19 268 + Normal
01/02/2026 07 PM PST 8.22 280 + Normal
01/02/2026 08 PM PST 8.27 300 + Normal
01/02/2026 09 PM PST 8.31 317 + Normal
01/02/2026 10 PM PST 8.35 335 + Normal
01/02/2026 11 PM PST 8.38 348 + Normal
01/03/2026 12 AM PST 8.41 362 + Normal
01/03/2026 01 AM PST 8.45 381 + Normal
01/03/2026 02 AM PST 8.50 406 + Normal
01/03/2026 03 AM PST 8.53 421 + Normal
01/03/2026 04 AM PST 8.54 426 + Normal
01/03/2026 05 AM PST 8.55 431 + Normal
01/03/2026 06 AM PST 8.55 431 0 Normal
01/03/2026 07 AM PST 8.56 436 + Normal
01/03/2026 08 AM PST 8.55 431 - Normal
01/03/2026 09 AM PST 8.54 426 - Normal
01/03/2026 10 AM PST 8.51 411 - Normal
01/03/2026 11 AM PST 8.48 396 - Normal
01/03/2026 12 PM PST 8.46 386 - Normal
01/03/2026 01 PM PST 8.43 371 - Normal
01/03/2026 02 PM PST 8.40 357 - Normal
01/03/2026 03 PM PST 8.38 348 - Normal
01/03/2026 04 PM PST 8.36 339 - Normal
01/03/2026 05 PM PST 8.35 335 - Normal
01/03/2026 06 PM PST 8.33 326 - Normal
01/03/2026 07 PM PST 8.30 313 - Normal
01/03/2026 08 PM PST 8.28 304 - Normal
01/03/2026 09 PM PST 8.25 292 - Normal
01/03/2026 10 PM PST 8.22 280 - Normal
01/03/2026 11 PM PST 8.18 264 - Normal
01/04/2026 12 AM PST 8.13 245 - Normal
01/04/2026 01 AM PST 8.08 227 - Normal
01/04/2026 02 AM PST 8.03 210 - Normal
01/04/2026 03 AM PST 7.98 193 - Normal
01/04/2026 04 AM PST 7.93 177 - Normal
01/04/2026 05 AM PST 7.88 162 - Normal
01/04/2026 06 AM PST 7.84 150 - Normal
01/04/2026 07 AM PST 7.80 139 - Normal
01/04/2026 08 AM PST 7.77 131 - Normal
01/04/2026 09 AM PST 7.76 128 - Normal
01/04/2026 10 AM PST 7.77 131 + Normal
01/04/2026 11 AM PST 7.81 141 + Normal
01/04/2026 12 PM PST 7.86 156 + Normal
01/04/2026 01 PM PST 7.93 177 + Normal
01/04/2026 02 PM PST 7.99 196 + Normal
01/04/2026 03 PM PST 8.05 217 + Normal
01/04/2026 04 PM PST 8.11 238 + Normal
01/04/2026 05 PM PST 8.16 256 + Normal
01/04/2026 06 PM PST 8.22 280 + Normal
01/04/2026 07 PM PST 8.29 308 + Normal
01/04/2026 08 PM PST 8.37 344 + Normal
01/04/2026 09 PM PST 8.45 381 + Normal
01/04/2026 10 PM PST 8.54 426 + Normal
01/04/2026 11 PM PST 8.61 463 + Normal
01/05/2026 12 AM PST 8.66 491 + Normal
01/05/2026 01 AM PST 8.69 508 + Normal
01/05/2026 02 AM PST 8.68 502 - Normal
01/05/2026 03 AM PST 8.64 479 - Normal
01/05/2026 04 AM PST 8.61 463 - Normal
01/05/2026 05 AM PST 8.58 447 - Normal
01/05/2026 06 AM PST 8.57 442 - Normal
01/05/2026 07 AM PST 8.60 458 + Normal
01/05/2026 08 AM PST 8.66 491 + Normal
01/05/2026 09 AM PST 8.69 508 + Normal
01/05/2026 10 AM PST 8.68 502 - Normal
01/05/2026 11 AM PST 8.65 485 - Normal
01/05/2026 12 PM PST 8.62 468 - Normal
01/05/2026 01 PM PST 8.57 442 - Normal
01/05/2026 02 PM PST 8.53 421 - Normal
01/05/2026 03 PM PST 8.49 401 - Normal
01/05/2026 04 PM PST 8.45 381 - Normal
01/05/2026 05 PM PST 8.41 362 - Normal
01/05/2026 06 PM PST 8.36 339 - Normal
01/05/2026 07 PM PST 8.31 317 - Normal
01/05/2026 08 PM PST 8.26 296 - Normal
01/05/2026 09 PM PST 8.21 276 - Normal
01/05/2026 10 PM PST 8.16 256 - Normal
01/05/2026 11 PM PST 8.11 238 - Normal
01/06/2026 12 AM PST 8.05 217 - Normal
01/06/2026 01 AM PST 7.99 196 - Normal
01/06/2026 02 AM PST 7.94 180 - Normal
01/06/2026 03 AM PST 7.89 165 - Normal
01/06/2026 04 AM PST 7.85 153 - Normal
01/06/2026 05 AM PST 7.81 141 - Normal
01/06/2026 06 AM PST 7.76 128 - Normal
01/06/2026 07 AM PST 7.73 120 - Normal
01/06/2026 08 AM PST 7.69 111 - Normal
01/06/2026 09 AM PST 7.66 104 - Normal
01/06/2026 10 AM PST 7.62 96 - Normal
01/06/2026 11 AM PST 7.59 91 - Normal
01/06/2026 12 PM PST 7.56 85 - Normal
01/06/2026 01 PM PST 7.54 81 - Normal
01/06/2026 02 PM PST 7.51 76 - Normal
01/06/2026 03 PM PST 7.50 74 - Normal
01/06/2026 04 PM PST 7.48 71 - Normal
01/06/2026 05 PM PST 7.47 69 - Normal
01/06/2026 06 PM PST 7.46 68 - Normal
01/06/2026 07 PM PST 7.45 66 - Normal
01/06/2026 08 PM PST 7.44 65 - Normal
01/06/2026 09 PM PST 7.43 63 - Normal
01/06/2026 10 PM PST 7.43 63 0 Normal
01/06/2026 11 PM PST 7.44 65 + Normal
01/07/2026 12 AM PST 7.47 69 + Normal
01/07/2026 01 AM PST 7.52 78 + Normal
01/07/2026 02 AM PST 7.58 89 + Normal
01/07/2026 03 AM PST 7.64 100 + Normal
01/07/2026 04 AM PST 7.70 113 + 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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