National Weather Service California-Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SANTA MARGARITA RIVER - YSIDORA (YDRC1)
Latitude: 33.31º NLongitude: 117.35º WElevation: 75 FeetForecast Type: Official Location
Location: San Diego County in CaliforniaBulletin Group: Southern CaliforniaRiver Group: San Diego/Inland
Issuance Time: Nov 11 2026 at 7:32 AM PSTNext Issuance: Nov 12 2026 at 9:00 AM PST
Action: 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:  11/11/2026 at 07:32 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  11/11/2026 at 07:00 AM PST
# Maximum Observed Stage:                       7.18 Feet
# Maximum Observed Flow:                        1 cfs
#
# Earliest Date & Time of Maximum Forecast:     11/14/2026 at 05:00 PM PST
# Maximum Forecast Stage:                       8.09 Feet
# Maximum Forecast Flow:                        178 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  11/06/2026 07 AM PST            7.17              0                        Normal
  11/06/2026 08 AM PST            7.17              0         0              Normal
  11/06/2026 09 AM PST            7.17              0         0              Normal
  11/06/2026 10 AM PST            7.17              0         0              Normal
  11/06/2026 11 AM PST            7.17              0         0              Normal
  11/06/2026 12 PM PST            7.17              0         0              Normal
  11/06/2026 01 PM PST            7.17              0         0              Normal
  11/06/2026 02 PM PST            7.17              0         0              Normal
  11/06/2026 03 PM PST            7.17              0         0              Normal
  11/06/2026 04 PM PST            7.17              0         0              Normal
  11/06/2026 05 PM PST            7.17              0         0              Normal
  11/06/2026 06 PM PST            7.17              0         0              Normal
  11/06/2026 07 PM PST            7.17              0         0              Normal
  11/06/2026 08 PM PST            7.17              0         0              Normal
  11/06/2026 09 PM PST            7.17              0         0              Normal
  11/06/2026 10 PM PST            7.17              0         0              Normal
  11/06/2026 11 PM PST            7.17              0         0              Normal
  11/07/2026 12 AM PST            7.17              0         0              Normal
  11/07/2026 01 AM PST            7.17              0         0              Normal
  11/07/2026 02 AM PST            7.17              0         0              Normal
  11/07/2026 03 AM PST            7.17              0         0              Normal
  11/07/2026 04 AM PST            7.17              0         0              Normal
  11/07/2026 05 AM PST            7.17              0         0              Normal
  11/07/2026 06 AM PST            7.17              0         0              Normal
  11/07/2026 07 AM PST            7.17              0         0              Normal
  11/07/2026 08 AM PST            7.17              0         0              Normal
  11/07/2026 09 AM PST            7.17              0         0              Normal
  11/07/2026 10 AM PST            7.17              0         0              Normal
  11/07/2026 11 AM PST            7.17              0         0              Normal
  11/07/2026 12 PM PST            7.17              0         0              Normal
  11/07/2026 01 PM PST            7.17              0         0              Normal
  11/07/2026 02 PM PST            7.17              0         0              Normal
  11/07/2026 03 PM PST            7.17              0         0              Normal
  11/07/2026 04 PM PST            7.17              0         0              Normal
  11/07/2026 05 PM PST            7.17              0         0              Normal
  11/07/2026 06 PM PST            7.17              0         0              Normal
  11/07/2026 07 PM PST            7.17              0         0              Normal
  11/07/2026 08 PM PST            7.17              0         0              Normal
  11/07/2026 09 PM PST            7.17              0         0              Normal
  11/07/2026 10 PM PST            7.17              0         0              Normal
  11/07/2026 11 PM PST            7.17              0         0              Normal
  11/08/2026 12 AM PST            7.17              0         0              Normal
  11/08/2026 01 AM PST            7.17              0         0              Normal
  11/08/2026 02 AM PST            7.17              0         0              Normal
  11/08/2026 03 AM PST            7.17              0         0              Normal
  11/08/2026 04 AM PST            7.17              0         0              Normal
  11/08/2026 05 AM PST            7.17              0         0              Normal
  11/08/2026 06 AM PST            7.17              0         0              Normal
  11/08/2026 07 AM PST            7.17              0         0              Normal
  11/08/2026 08 AM PST            7.17              0         0              Normal
  11/08/2026 09 AM PST            7.17              0         0              Normal
  11/08/2026 10 AM PST            7.17              0         0              Normal
  11/08/2026 11 AM PST            7.17              0         0              Normal
  11/08/2026 12 PM PST            7.17              0         0              Normal
  11/08/2026 01 PM PST            7.17              0         0              Normal
  11/08/2026 02 PM PST            7.17              0         0              Normal
  11/08/2026 03 PM PST            7.17              0         0              Normal
  11/08/2026 04 PM PST            7.17              0         0              Normal
  11/08/2026 05 PM PST            7.17              0         0              Normal
  11/08/2026 06 PM PST            7.17              0         0              Normal
  11/08/2026 07 PM PST            7.17              0         0              Normal
  11/08/2026 08 PM PST            7.17              0         0              Normal
  11/08/2026 09 PM PST            7.17              0         0              Normal
  11/08/2026 10 PM PST            7.17              0         0              Normal
  11/08/2026 11 PM PST            7.17              0         0              Normal
  11/09/2026 12 AM PST            7.17              0         0              Normal
  11/09/2026 01 AM PST            7.17              0         0              Normal
  11/09/2026 02 AM PST            7.17              0         0              Normal
  11/09/2026 03 AM PST            7.17              0         0              Normal
  11/09/2026 04 AM PST            7.17              0         0              Normal
  11/09/2026 05 AM PST            7.17              0         0              Normal
  11/09/2026 06 AM PST            7.17              0         0              Normal
  11/09/2026 07 AM PST            7.17              0         0              Normal
  11/09/2026 08 AM PST            7.17              0         0              Normal
  11/09/2026 09 AM PST            7.17              0         0              Normal
  11/09/2026 10 AM PST            7.17              0         0              Normal
  11/09/2026 11 AM PST            7.17              0         0              Normal
  11/09/2026 12 PM PST            7.17              0         0              Normal
  11/09/2026 01 PM PST            7.17              0         0              Normal
  11/09/2026 02 PM PST            7.17              0         0              Normal
  11/09/2026 03 PM PST            7.17              0         0              Normal
  11/09/2026 04 PM PST            7.17              0         0              Normal
  11/09/2026 05 PM PST            7.17              0         0              Normal
  11/09/2026 06 PM PST            7.17              0         0              Normal
  11/09/2026 07 PM PST            7.17              0         0              Normal
  11/09/2026 08 PM PST            7.17              0         0              Normal
  11/09/2026 09 PM PST            7.17              0         0              Normal
  11/09/2026 10 PM PST            7.17              0         0              Normal
  11/09/2026 11 PM PST            7.17              0         0              Normal
  11/10/2026 12 AM PST            7.17              0         0              Normal
  11/10/2026 01 AM PST            7.17              0         0              Normal
  11/10/2026 02 AM PST            7.17              0         0              Normal
  11/10/2026 03 AM PST            7.17              0         0              Normal
  11/10/2026 04 AM PST            7.17              0         0              Normal
  11/10/2026 05 AM PST            7.17              0         0              Normal
  11/10/2026 06 AM PST            7.17              0         0              Normal
  11/10/2026 07 AM PST            7.17              0         0              Normal
  11/10/2026 08 AM PST            7.17              0         0              Normal
  11/10/2026 09 AM PST            7.17              0         0              Normal
  11/10/2026 10 AM PST            7.17              0         0              Normal
  11/10/2026 11 AM PST            7.17              0         0              Normal
  11/10/2026 12 PM PST            7.17              0         0              Normal
  11/10/2026 01 PM PST            7.17              0         0              Normal
  11/10/2026 02 PM PST            7.17              0         0              Normal
  11/10/2026 03 PM PST            7.17              0         0              Normal
  11/10/2026 04 PM PST            7.17              0         0              Normal
  11/10/2026 05 PM PST            7.17              0         0              Normal
  11/10/2026 06 PM PST            7.17              0         0              Normal
  11/10/2026 07 PM PST            7.17              0         0              Normal
  11/10/2026 08 PM PST            7.17              0         0              Normal
  11/10/2026 09 PM PST            7.17              0         0              Normal
  11/10/2026 10 PM PST            7.17              0         0              Normal
  11/10/2026 11 PM PST            7.17              0         0              Normal
  11/11/2026 12 AM PST            7.17              0         0              Normal
  11/11/2026 01 AM PST            7.17              0         0              Normal
  11/11/2026 02 AM PST            7.17              0         0              Normal
  11/11/2026 03 AM PST            7.17              0         0              Normal
  11/11/2026 04 AM PST            7.17              0         0              Normal
  11/11/2026 05 AM PST            7.17              0         0              Normal
  11/11/2026 06 AM PST            7.17              0         0              Normal
  11/11/2026 07 AM PST            7.18              1         +              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  11/11/2026 08 AM PST            7.17              0                        Normal
  11/11/2026 09 AM PST            7.17              0         0              Normal
  11/11/2026 10 AM PST            7.17              0         0              Normal
  11/11/2026 11 AM PST            7.17              0         0              Normal
  11/11/2026 12 PM PST            7.17              0         0              Normal
  11/11/2026 01 PM PST            7.17              0         0              Normal
  11/11/2026 02 PM PST            7.17              0         0              Normal
  11/11/2026 03 PM PST            7.17              0         0              Normal
  11/11/2026 04 PM PST            7.17              0         0              Normal
  11/11/2026 05 PM PST            7.17              0         0              Normal
  11/11/2026 06 PM PST            7.17              0         0              Normal
  11/11/2026 07 PM PST            7.17              0         0              Normal
  11/11/2026 08 PM PST            7.17              0         0              Normal
  11/11/2026 09 PM PST            7.17              0         0              Normal
  11/11/2026 10 PM PST            7.17              0         0              Normal
  11/11/2026 11 PM PST            7.17              0         0              Normal
  11/12/2026 12 AM PST            7.17              0         0              Normal
  11/12/2026 01 AM PST            7.17              0         0              Normal
  11/12/2026 02 AM PST            7.17              0         0              Normal
  11/12/2026 03 AM PST            7.17              0         0              Normal
  11/12/2026 04 AM PST            7.17              0         0              Normal
  11/12/2026 05 AM PST            7.17              0         0              Normal
  11/12/2026 06 AM PST            7.17              0         0              Normal
  11/12/2026 07 AM PST            7.17              0         0              Normal
  11/12/2026 08 AM PST            7.17              0         0              Normal
  11/12/2026 09 AM PST            7.17              0         0              Normal
  11/12/2026 10 AM PST            7.17              0         0              Normal
  11/12/2026 11 AM PST            7.17              0         0              Normal
  11/12/2026 12 PM PST            7.17              0         0              Normal
  11/12/2026 01 PM PST            7.17              0         0              Normal
  11/12/2026 02 PM PST            7.17              0         0              Normal
  11/12/2026 03 PM PST            7.17              0         0              Normal
  11/12/2026 04 PM PST            7.17              0         0              Normal
  11/12/2026 05 PM PST            7.17              0         0              Normal
  11/12/2026 06 PM PST            7.17              0         0              Normal
  11/12/2026 07 PM PST            7.17              0         0              Normal
  11/12/2026 08 PM PST            7.17              0         0              Normal
  11/12/2026 09 PM PST            7.17              0         0              Normal
  11/12/2026 10 PM PST            7.17              0         0              Normal
  11/12/2026 11 PM PST            7.17              0         0              Normal
  11/13/2026 12 AM PST            7.17              0         0              Normal
  11/13/2026 01 AM PST            7.17              0         0              Normal
  11/13/2026 02 AM PST            7.17              0         0              Normal
  11/13/2026 03 AM PST            7.17              0         0              Normal
  11/13/2026 04 AM PST            7.17              0         0              Normal
  11/13/2026 05 AM PST            7.17              0         0              Normal
  11/13/2026 06 AM PST            7.17              0         0              Normal
  11/13/2026 07 AM PST            7.17              0         0              Normal
  11/13/2026 08 AM PST            7.17              0         0              Normal
  11/13/2026 09 AM PST            7.17              0         0              Normal
  11/13/2026 10 AM PST            7.17              0         0              Normal
  11/13/2026 11 AM PST            7.17              0         0              Normal
  11/13/2026 12 PM PST            7.17              0         0              Normal
  11/13/2026 01 PM PST            7.17              0         0              Normal
  11/13/2026 02 PM PST            7.17              0         0              Normal
  11/13/2026 03 PM PST            7.17              0         0              Normal
  11/13/2026 04 PM PST            7.17              0         0              Normal
  11/13/2026 05 PM PST            7.17              0         0              Normal
  11/13/2026 06 PM PST            7.17              0         0              Normal
  11/13/2026 07 PM PST            7.17              0         0              Normal
  11/13/2026 08 PM PST            7.17              0         0              Normal
  11/13/2026 09 PM PST            7.17              0         0              Normal
  11/13/2026 10 PM PST            7.17              0         0              Normal
  11/13/2026 11 PM PST            7.17              0         0              Normal
  11/14/2026 12 AM PST            7.18              1         +              Normal
  11/14/2026 01 AM PST            7.18              1         0              Normal
  11/14/2026 02 AM PST            7.20              2         +              Normal
  11/14/2026 03 AM PST            7.21              3         +              Normal
  11/14/2026 04 AM PST            7.22              4         +              Normal
  11/14/2026 05 AM PST            7.24              6         +              Normal
  11/14/2026 06 AM PST            7.26              7         +              Normal
  11/14/2026 07 AM PST            7.28              9         +              Normal
  11/14/2026 08 AM PST            7.30             11         +              Normal
  11/14/2026 09 AM PST            7.36             17         +              Normal
  11/14/2026 10 AM PST            7.46             30         +              Normal
  11/14/2026 11 AM PST            7.60             54         +              Normal
  11/14/2026 12 PM PST            7.73             80         +              Normal
  11/14/2026 01 PM PST            7.85            109         +              Normal
  11/14/2026 02 PM PST            7.95            136         +              Normal
  11/14/2026 03 PM PST            8.03            159         +              Normal
  11/14/2026 04 PM PST            8.08            175         +              Normal
  11/14/2026 05 PM PST            8.09            178         +              Normal
  11/14/2026 06 PM PST            8.08            175         -              Normal
  11/14/2026 07 PM PST            8.06            168         -              Normal
  11/14/2026 08 PM PST            8.03            159         -              Normal
  11/14/2026 09 PM PST            8.00            150         -              Normal
  11/14/2026 10 PM PST            7.96            139         -              Normal
  11/14/2026 11 PM PST            7.91            125         -              Normal
  11/15/2026 12 AM PST            7.86            112         -              Normal
  11/15/2026 01 AM PST            7.81             99         -              Normal
  11/15/2026 02 AM PST            7.76             87         -              Normal
  11/15/2026 03 AM PST            7.71             76         -              Normal
  11/15/2026 04 AM PST            7.66             65         -              Normal
  11/15/2026 05 AM PST            7.61             55         -              Normal
  11/15/2026 06 AM PST            7.56             46         -              Normal
  11/15/2026 07 AM PST            7.52             39         -              Normal
  11/15/2026 08 AM PST            7.48             33         -              Normal
  11/15/2026 09 AM PST            7.44             27         -              Normal
  11/15/2026 10 AM PST            7.41             23         -              Normal
  11/15/2026 11 AM PST            7.38             19         -              Normal
  11/15/2026 12 PM PST            7.35             16         -              Normal
  11/15/2026 01 PM PST            7.32             13         -              Normal
  11/15/2026 02 PM PST            7.30             11         -              Normal
  11/15/2026 03 PM PST            7.27              8         -              Normal
  11/15/2026 04 PM PST            7.25              6         -              Normal
  11/15/2026 05 PM PST            7.24              6         -              Normal
  11/15/2026 06 PM PST            7.23              5         -              Normal
  11/15/2026 07 PM PST            7.21              3         -              Normal
  11/15/2026 08 PM PST            7.21              3         0              Normal
  11/15/2026 09 PM PST            7.20              2         -              Normal
  11/15/2026 10 PM PST            7.19              2         -              Normal
  11/15/2026 11 PM PST            7.19              2         0              Normal
  11/16/2026 12 AM PST            7.19              2         0              Normal
  11/16/2026 01 AM PST            7.18              1         -              Normal
  11/16/2026 02 AM PST            7.18              1         0              Normal
  11/16/2026 03 AM PST            7.18              1         0              Normal
  11/16/2026 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.