SANTA MARGARITA RIVER - YSIDORA (YDRC1)
Latitude: 33.31º NLongitude: 117.35º WElevation: 75 Feet
Location: San Diego County in CaliforniaBulletin Group: Southern CaliforniaRiver Group: San Diego/Inland
Issuance Time: Dec 27 2025 at 9:19 AM PSTNext Issuance: Dec 28 2025 at 9:00 AM PST
Action/Monitor: 10.85 FeetMinor Flood: 12.5 FeetModerate Flood: 13.78 FeetMajor Flood: 16.29 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Santa Margarita River - Ysidora (YDRC1)
#
# File Generation Time:  12/27/2025 at 09:19 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/25/2025 at 09:00 AM PST
# Maximum Observed Stage:                       8.65 Feet
# Maximum Observed Flow:                        471 cfs
#
# Earliest Date & Time of Maximum Forecast:     12/27/2025 at 10:00 AM PST
# Maximum Forecast Stage:                       7.85 Feet
# Maximum Forecast Flow:                        139 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/22/2025 09 AM PST            7.10             19                        Normal
  12/22/2025 10 AM PST            7.10             19         0              Normal
  12/22/2025 11 AM PST            7.10             19         0              Normal
  12/22/2025 12 PM PST            7.04             15         -              Normal
  12/22/2025 01 PM PST            7.13             21         +              Normal
  12/22/2025 02 PM PST            7.13             21         0              Normal
  12/22/2025 03 PM PST            7.15             23         +              Normal
  12/22/2025 04 PM PST            7.15             23         0              Normal
  12/22/2025 05 PM PST            7.16             24         +              Normal
  12/22/2025 06 PM PST            7.15             23         -              Normal
  12/22/2025 07 PM PST            7.15             23         0              Normal
  12/22/2025 08 PM PST            7.15             23         0              Normal
  12/22/2025 09 PM PST            7.16             24         +              Normal
  12/22/2025 10 PM PST            7.16             24         0              Normal
  12/22/2025 11 PM PST            7.16             24         0              Normal
  12/23/2025 12 AM PST            7.16             24         0              Normal
  12/23/2025 01 AM PST            7.15             23         -              Normal
  12/23/2025 02 AM PST            7.16             24         +              Normal
  12/23/2025 03 AM PST            7.13             21         -              Normal
  12/23/2025 04 AM PST            7.09             18         -              Normal
  12/23/2025 05 AM PST            7.08             17         -              Normal
  12/23/2025 06 AM PST            7.11             20         +              Normal
  12/23/2025 07 AM PST            7.15             23         +              Normal
  12/23/2025 08 AM PST            7.12             21         -              Normal
  12/23/2025 09 AM PST            7.12             21         0              Normal
  12/23/2025 10 AM PST            7.11             20         -              Normal
  12/23/2025 11 AM PST            7.13             21         +              Normal
  12/23/2025 12 PM PST            7.12             21         -              Normal
  12/23/2025 01 PM PST            7.09             18         -              Normal
  12/23/2025 02 PM PST            6.98             11         -              Normal
  12/23/2025 03 PM PST            7.01             13         +              Normal
  12/23/2025 04 PM PST            7.00             12         -              Normal
  12/23/2025 05 PM PST            7.01             13         +              Normal
  12/23/2025 06 PM PST            7.06             16         +              Normal
  12/23/2025 07 PM PST            7.06             16         0              Normal
  12/23/2025 08 PM PST            7.02             13         -              Normal
  12/23/2025 09 PM PST            7.02             13         0              Normal
  12/23/2025 10 PM PST            7.03             14         +              Normal
  12/23/2025 11 PM PST            7.07             17         +              Normal
  12/24/2025 12 AM PST            7.07             17         0              Normal
  12/24/2025 01 AM PST            7.04             15         -              Normal
  12/24/2025 02 AM PST            7.07             17         +              Normal
  12/24/2025 03 AM PST            7.07             17         0              Normal
  12/24/2025 04 AM PST            7.04             15         -              Normal
  12/24/2025 05 AM PST            7.10             19         +              Normal
  12/24/2025 06 AM PST            7.07             17         -              Normal
  12/24/2025 07 AM PST            7.05             15         -              Normal
  12/24/2025 08 AM PST            6.98             11         -              Normal
  12/24/2025 09 AM PST            7.02             13         +              Normal
  12/24/2025 10 AM PST            6.99             11         -              Normal
  12/24/2025 11 AM PST            7.03             14         +              Normal
  12/24/2025 12 PM PST            7.17             25         +              Normal
  12/24/2025 01 PM PST            7.20             28         +              Normal
  12/24/2025 02 PM PST            7.20             28         0              Normal
  12/24/2025 03 PM PST            7.20             28         0              Normal
  12/24/2025 04 PM PST            7.23             31         +              Normal
  12/24/2025 05 PM PST            7.22             30         -              Normal
  12/24/2025 06 PM PST            7.24             32         +              Normal
  12/24/2025 07 PM PST            7.23             31         -              Normal
  12/24/2025 08 PM PST            7.22             30         -              Normal
  12/24/2025 09 PM PST            7.21             29         -              Normal
  12/24/2025 10 PM PST            7.22             30         +              Normal
  12/24/2025 11 PM PST            7.22             30         0              Normal
  12/25/2025 12 AM PST            7.22             30         0              Normal
  12/25/2025 01 AM PST            7.23             31         +              Normal
  12/25/2025 02 AM PST            7.22             30         -              Normal
  12/25/2025 03 AM PST            7.22             30         0              Normal
  12/25/2025 04 AM PST            7.60             83         +              Normal
  12/25/2025 05 AM PST            8.39            336         +              Normal
  12/25/2025 06 AM PST            8.59            437         +              Normal
  12/25/2025 07 AM PST            8.63            459         +              Normal
  12/25/2025 08 AM PST            8.63            459         0              Normal
  12/25/2025 09 AM PST            8.65            471         +              Normal
  12/25/2025 10 AM PST            8.61            448         -              Normal
  12/25/2025 11 AM PST            8.57            426         -              Normal
  12/25/2025 12 PM PST            8.54            410         -              Normal
  12/25/2025 01 PM PST            8.44            360         -              Normal
  12/25/2025 02 PM PST            8.40            341         -              Normal
  12/25/2025 03 PM PST            8.37            327         -              Normal
  12/25/2025 04 PM PST            8.33            309         -              Normal
  12/25/2025 05 PM PST            8.28            287         -              Normal
  12/25/2025 06 PM PST            8.25            275         -              Normal
  12/25/2025 07 PM PST            8.20            255         -              Normal
  12/25/2025 08 PM PST            8.18            247         -              Normal
  12/25/2025 09 PM PST            8.16            239         -              Normal
  12/25/2025 10 PM PST            8.13            228         -              Normal
  12/25/2025 11 PM PST            8.10            217         -              Normal
  12/26/2025 12 AM PST            8.07            207         -              Normal
  12/26/2025 01 AM PST            8.05            200         -              Normal
  12/26/2025 02 AM PST            8.02            190         -              Normal
  12/26/2025 03 AM PST            8.00            183         -              Normal
  12/26/2025 04 AM PST            8.02            190         +              Normal
  12/26/2025 05 AM PST            8.02            190         0              Normal
  12/26/2025 06 AM PST            8.02            190         0              Normal
  12/26/2025 07 AM PST            8.01            187         -              Normal
  12/26/2025 08 AM PST            7.98            177         -              Normal
  12/26/2025 09 AM PST            7.93            162         -              Normal
  12/26/2025 10 AM PST            7.88            147         -              Normal
  12/26/2025 11 AM PST            7.87            144         -              Normal
  12/26/2025 12 PM PST            7.88            147         +              Normal
  12/26/2025 01 PM PST            7.85            139         -              Normal
  12/26/2025 02 PM PST            7.84            136         -              Normal
  12/26/2025 03 PM PST            7.79            123         -              Normal
  12/26/2025 04 PM PST            7.81            128         +              Normal
  12/26/2025 05 PM PST            7.82            131         +              Normal
  12/26/2025 06 PM PST            7.78            120         -              Normal
  12/26/2025 07 PM PST            7.77            118         -              Normal
  12/26/2025 08 PM PST            7.75            113         -              Normal
  12/26/2025 09 PM PST            7.75            113         0              Normal
  12/26/2025 10 PM PST            7.74            111         -              Normal
  12/26/2025 11 PM PST            7.70            102         -              Normal
  12/27/2025 12 AM PST            7.70            102         0              Normal
  12/27/2025 01 AM PST            7.69            100         -              Normal
  12/27/2025 02 AM PST            7.69            100         0              Normal
  12/27/2025 03 AM PST            7.69            100         0              Normal
  12/27/2025 04 AM PST            7.68             98         -              Normal
  12/27/2025 05 AM PST            7.66             94         -              Normal
  12/27/2025 06 AM PST            7.66             94         0              Normal
  12/27/2025 07 AM PST            7.77            118         +              Normal
  12/27/2025 08 AM PST            7.82            131         +              Normal
  12/27/2025 09 AM PST            7.84            136         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/27/2025 10 AM PST            7.85            139                        Normal
  12/27/2025 11 AM PST            7.85            139         0              Normal
  12/27/2025 12 PM PST            7.85            139         0              Normal
  12/27/2025 01 PM PST            7.83            133         -              Normal
  12/27/2025 02 PM PST            7.80            125         -              Normal
  12/27/2025 03 PM PST            7.77            118         -              Normal
  12/27/2025 04 PM PST            7.74            111         -              Normal
  12/27/2025 05 PM PST            7.69            100         -              Normal
  12/27/2025 06 PM PST            7.63             89         -              Normal
  12/27/2025 07 PM PST            7.58             80         -              Normal
  12/27/2025 08 PM PST            7.52             69         -              Normal
  12/27/2025 09 PM PST            7.47             62         -              Normal
  12/27/2025 10 PM PST            7.42             54         -              Normal
  12/27/2025 11 PM PST            7.38             49         -              Normal
  12/28/2025 12 AM PST            7.33             42         -              Normal
  12/28/2025 01 AM PST            7.29             37         -              Normal
  12/28/2025 02 AM PST            7.26             34         -              Normal
  12/28/2025 03 AM PST            7.23             31         -              Normal
  12/28/2025 04 AM PST            7.20             28         -              Normal
  12/28/2025 05 AM PST            7.17             25         -              Normal
  12/28/2025 06 AM PST            7.15             23         -              Normal
  12/28/2025 07 AM PST            7.13             21         -              Normal
  12/28/2025 08 AM PST            7.12             21         -              Normal
  12/28/2025 09 AM PST            7.11             20         -              Normal
  12/28/2025 10 AM PST            7.09             18         -              Normal
  12/28/2025 11 AM PST            7.08             17         -              Normal
  12/28/2025 12 PM PST            7.07             17         -              Normal
  12/28/2025 01 PM PST            7.07             17         0              Normal
  12/28/2025 02 PM PST            7.06             16         -              Normal
  12/28/2025 03 PM PST            7.05             15         -              Normal
  12/28/2025 04 PM PST            7.05             15         0              Normal
  12/28/2025 05 PM PST            7.04             15         -              Normal
  12/28/2025 06 PM PST            7.04             15         0              Normal
  12/28/2025 07 PM PST            7.03             14         -              Normal
  12/28/2025 08 PM PST            7.03             14         0              Normal
  12/28/2025 09 PM PST            7.02             13         -              Normal
  12/28/2025 10 PM PST            7.02             13         0              Normal
  12/28/2025 11 PM PST            7.02             13         0              Normal
  12/29/2025 12 AM PST            7.01             13         -              Normal
  12/29/2025 01 AM PST            7.01             13         0              Normal
  12/29/2025 02 AM PST            7.01             13         0              Normal
  12/29/2025 03 AM PST            7.00             12         -              Normal
  12/29/2025 04 AM PST            7.00             12         0              Normal
  12/29/2025 05 AM PST            7.00             12         0              Normal
  12/29/2025 06 AM PST            7.00             12         0              Normal
  12/29/2025 07 AM PST            6.99             11         -              Normal
  12/29/2025 08 AM PST            6.99             11         0              Normal
  12/29/2025 09 AM PST            6.99             11         0              Normal
  12/29/2025 10 AM PST            6.99             11         0              Normal
  12/29/2025 11 AM PST            6.98             11         -              Normal
  12/29/2025 12 PM PST            6.98             11         0              Normal
  12/29/2025 01 PM PST            6.98             11         0              Normal
  12/29/2025 02 PM PST            6.97             10         -              Normal
  12/29/2025 03 PM PST            6.97             10         0              Normal
  12/29/2025 04 PM PST            6.97             10         0              Normal
  12/29/2025 05 PM PST            6.96             10         -              Normal
  12/29/2025 06 PM PST            6.96             10         0              Normal
  12/29/2025 07 PM PST            6.96             10         0              Normal
  12/29/2025 08 PM PST            6.96             10         0              Normal
  12/29/2025 09 PM PST            6.95              9         -              Normal
  12/29/2025 10 PM PST            6.95              9         0              Normal
  12/29/2025 11 PM PST            6.95              9         0              Normal
  12/30/2025 12 AM PST            6.95              9         0              Normal
  12/30/2025 01 AM PST            6.94              9         -              Normal
  12/30/2025 02 AM PST            6.94              9         0              Normal
  12/30/2025 03 AM PST            6.94              9         0              Normal
  12/30/2025 04 AM PST            6.93              8         -              Normal
  12/30/2025 05 AM PST            6.93              8         0              Normal
  12/30/2025 06 AM PST            6.93              8         0              Normal
  12/30/2025 07 AM PST            6.93              8         0              Normal
  12/30/2025 08 AM PST            6.92              8         -              Normal
  12/30/2025 09 AM PST            6.92              8         0              Normal
  12/30/2025 10 AM PST            6.92              8         0              Normal
  12/30/2025 11 AM PST            6.91              7         -              Normal
  12/30/2025 12 PM PST            6.91              7         0              Normal
  12/30/2025 01 PM PST            6.91              7         0              Normal
  12/30/2025 02 PM PST            6.91              7         0              Normal
  12/30/2025 03 PM PST            6.90              7         -              Normal
  12/30/2025 04 PM PST            6.90              7         0              Normal
  12/30/2025 05 PM PST            6.90              7         0              Normal
  12/30/2025 06 PM PST            6.89              6         -              Normal
  12/30/2025 07 PM PST            6.89              6         0              Normal
  12/30/2025 08 PM PST            6.89              6         0              Normal
  12/30/2025 09 PM PST            6.89              6         0              Normal
  12/30/2025 10 PM PST            6.88              6         -              Normal
  12/30/2025 11 PM PST            6.88              6         0              Normal
  12/31/2025 12 AM PST            6.88              6         0              Normal
  12/31/2025 01 AM PST            6.87              5         -              Normal
  12/31/2025 02 AM PST            6.87              5         0              Normal
  12/31/2025 03 AM PST            6.87              5         0              Normal
  12/31/2025 04 AM PST            6.87              5         0              Normal
  12/31/2025 05 AM PST            6.86              5         -              Normal
  12/31/2025 06 AM PST            6.86              5         0              Normal
  12/31/2025 07 AM PST            6.86              5         0              Normal
  12/31/2025 08 AM PST            6.85              5         -              Normal
  12/31/2025 09 AM PST            6.85              5         0              Normal
  12/31/2025 10 AM PST            6.85              5         0              Normal
  12/31/2025 11 AM PST            6.84              4         -              Normal
  12/31/2025 12 PM PST            6.84              4         0              Normal
  12/31/2025 01 PM PST            6.84              4         0              Normal
  12/31/2025 02 PM PST            6.83              4         -              Normal
  12/31/2025 03 PM PST            6.84              4         +              Normal
  12/31/2025 04 PM PST            6.85              5         +              Normal
  12/31/2025 05 PM PST            6.86              5         +              Normal
  12/31/2025 06 PM PST            6.89              6         +              Normal
  12/31/2025 07 PM PST            6.91              7         +              Normal
  12/31/2025 08 PM PST            6.93              8         +              Normal
  12/31/2025 09 PM PST            6.96             10         +              Normal
  12/31/2025 10 PM PST            7.00             12         +              Normal
  12/31/2025 11 PM PST            7.06             16         +              Normal
  01/01/2026 12 AM PST            7.12             21         +              Normal
  01/01/2026 01 AM PST            7.17             25         +              Normal
  01/01/2026 02 AM PST            7.22             30         +              Normal
  01/01/2026 03 AM PST            7.26             34         +              Normal
  01/01/2026 04 AM PST            7.30             39         +              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.