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

*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.
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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: Jun 02 2025 at 7:41 AM PDTNext Issuance: Jun 03 2025 at 9:00 AM PDT
Action/Monitor: 8.2 FeetMinor Flood: 11.2 FeetModerate Flood: 13.3 FeetMajor Flood: 16.0 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Santa Margarita River - Ysidora (YDRC1)
#
# File Generation Time:  06/02/2025 at 07:41 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  06/01/2025 at 05:00 AM PDT
# Maximum Observed Stage:                       7.00 Feet
# Maximum Observed Flow:                        3 cfs
#
# Earliest Date & Time of Maximum Forecast:     06/04/2025 at 06:00 PM PDT
# Maximum Forecast Stage:                       7.24 Feet
# Maximum Forecast Flow:                        15 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/28/2025 07 AM PDT            6.98              3                        Normal
  05/28/2025 08 AM PDT            6.98              3         0              Normal
  05/28/2025 09 AM PDT            6.99              3         +              Normal
  05/28/2025 10 AM PDT            6.98              3         -              Normal
  05/28/2025 11 AM PDT            6.99              3         +              Normal
  05/28/2025 12 PM PDT            6.99              3         0              Normal
  05/28/2025 01 PM PDT            7.00              3         +              Normal
  05/28/2025 02 PM PDT            6.99              3         -              Normal
  05/28/2025 03 PM PDT            7.00              3         +              Normal
  05/28/2025 04 PM PDT            6.99              3         -              Normal
  05/28/2025 05 PM PDT            6.98              3         -              Normal
  05/28/2025 06 PM PDT            6.99              3         +              Normal
  05/28/2025 07 PM PDT            6.98              3         -              Normal
  05/28/2025 08 PM PDT            6.98              3         0              Normal
  05/28/2025 09 PM PDT            6.98              3         0              Normal
  05/28/2025 10 PM PDT            6.98              3         0              Normal
  05/28/2025 11 PM PDT            6.98              3         0              Normal
  05/29/2025 12 AM PDT            7.00              3         +              Normal
  05/29/2025 01 AM PDT            6.98              3         -              Normal
  05/29/2025 02 AM PDT            6.98              3         0              Normal
  05/29/2025 03 AM PDT            6.98              3         0              Normal
  05/29/2025 04 AM PDT            6.99              3         +              Normal
  05/29/2025 05 AM PDT            6.98              3         -              Normal
  05/29/2025 06 AM PDT            6.98              3         0              Normal
  05/29/2025 07 AM PDT            6.98              3         0              Normal
  05/29/2025 08 AM PDT            6.98              3         0              Normal
  05/29/2025 09 AM PDT            6.97              3         -              Normal
  05/29/2025 10 AM PDT            6.98              3         +              Normal
  05/29/2025 11 AM PDT            6.98              3         0              Normal
  05/29/2025 12 PM PDT            6.99              3         +              Normal
  05/29/2025 01 PM PDT            6.98              3         -              Normal
  05/29/2025 02 PM PDT            6.98              3         0              Normal
  05/29/2025 03 PM PDT            6.98              3         0              Normal
  05/29/2025 04 PM PDT            6.98              3         0              Normal
  05/29/2025 05 PM PDT            6.98              3         0              Normal
  05/29/2025 06 PM PDT            6.98              3         0              Normal
  05/29/2025 07 PM PDT            6.97              3         -              Normal
  05/29/2025 08 PM PDT            6.98              3         +              Normal
  05/29/2025 09 PM PDT            6.97              3         -              Normal
  05/29/2025 10 PM PDT            6.98              3         +              Normal
  05/29/2025 11 PM PDT            6.98              3         0              Normal
  05/30/2025 12 AM PDT            6.98              3         0              Normal
  05/30/2025 01 AM PDT            6.98              3         0              Normal
  05/30/2025 02 AM PDT            6.97              3         -              Normal
  05/30/2025 03 AM PDT            6.97              3         0              Normal
  05/30/2025 04 AM PDT            6.98              3         +              Normal
  05/30/2025 05 AM PDT            7.00              3         +              Normal
  05/30/2025 06 AM PDT            6.99              3         -              Normal
  05/30/2025 07 AM PDT            6.99              3         0              Normal
  05/30/2025 08 AM PDT            6.99              3         0              Normal
  05/30/2025 09 AM PDT            7.00              3         +              Normal
  05/30/2025 10 AM PDT            7.00              3         0              Normal
  05/30/2025 11 AM PDT            7.00              3         0              Normal
  05/30/2025 12 PM PDT            6.99              3         -              Normal
  05/30/2025 01 PM PDT            6.99              3         0              Normal
  05/30/2025 02 PM PDT            7.00              3         +              Normal
  05/30/2025 03 PM PDT            7.00              3         0              Normal
  05/30/2025 04 PM PDT            7.00              3         0              Normal
  05/30/2025 05 PM PDT            6.99              3         -              Normal
  05/30/2025 06 PM PDT            7.00              3         +              Normal
  05/30/2025 07 PM PDT            6.99              3         -              Normal
  05/30/2025 08 PM PDT            6.99              3         0              Normal
  05/30/2025 09 PM PDT            7.00              3         +              Normal
  05/30/2025 10 PM PDT            7.00              3         0              Normal
  05/30/2025 11 PM PDT            7.00              3         0              Normal
  05/31/2025 12 AM PDT            6.99              3         -              Normal
  05/31/2025 01 AM PDT            7.00              3         +              Normal
  05/31/2025 02 AM PDT            6.98              3         -              Normal
  05/31/2025 03 AM PDT            6.99              3         +              Normal
  05/31/2025 04 AM PDT            7.00              3         +              Normal
  05/31/2025 05 AM PDT            6.99              3         -              Normal
  05/31/2025 06 AM PDT            6.98              3         -              Normal
  05/31/2025 07 AM PDT            6.98              3         0              Normal
  05/31/2025 08 AM PDT            6.98              3         0              Normal
  05/31/2025 09 AM PDT            6.99              3         +              Normal
  05/31/2025 10 AM PDT            6.98              3         -              Normal
  05/31/2025 11 AM PDT            6.99              3         +              Normal
  05/31/2025 12 PM PDT            7.00              3         +              Normal
  05/31/2025 01 PM PDT            6.99              3         -              Normal
  05/31/2025 02 PM PDT            6.99              3         0              Normal
  05/31/2025 03 PM PDT            6.99              3         0              Normal
  05/31/2025 04 PM PDT            6.99              3         0              Normal
  05/31/2025 05 PM PDT            7.00              3         +              Normal
  05/31/2025 06 PM PDT            6.99              3         -              Normal
  05/31/2025 07 PM PDT            6.99              3         0              Normal
  05/31/2025 08 PM PDT            6.99              3         0              Normal
  05/31/2025 09 PM PDT            7.00              3         +              Normal
  05/31/2025 10 PM PDT            6.99              3         -              Normal
  05/31/2025 11 PM PDT            6.99              3         0              Normal
  06/01/2025 12 AM PDT            6.98              3         -              Normal
  06/01/2025 01 AM PDT            6.98              3         0              Normal
  06/01/2025 02 AM PDT            6.99              3         +              Normal
  06/01/2025 03 AM PDT            7.00              3         +              Normal
  06/01/2025 04 AM PDT            7.00              3         0              Normal
  06/01/2025 05 AM PDT            7.00              3         0              Normal
  06/01/2025 06 AM PDT            6.99              3         -              Normal
  06/01/2025 07 AM PDT            6.99              3         0              Normal
  06/01/2025 08 AM PDT            6.98              3         -              Normal
  06/01/2025 09 AM PDT            6.97              3         -              Normal
  06/01/2025 10 AM PDT            6.97              3         0              Normal
  06/01/2025 11 AM PDT            6.98              3         +              Normal
  06/01/2025 12 PM PDT            6.98              3         0              Normal
  06/01/2025 01 PM PDT            6.98              3         0              Normal
  06/01/2025 02 PM PDT            6.98              3         0              Normal
  06/01/2025 03 PM PDT            6.98              3         0              Normal
  06/01/2025 04 PM PDT            6.97              3         -              Normal
  06/01/2025 05 PM PDT            6.98              3         +              Normal
  06/01/2025 06 PM PDT            6.99              3         +              Normal
  06/01/2025 07 PM PDT            6.99              3         0              Normal
  06/01/2025 08 PM PDT            6.98              3         -              Normal
  06/01/2025 09 PM PDT            6.99              3         +              Normal
  06/01/2025 10 PM PDT            6.98              3         -              Normal
  06/01/2025 11 PM PDT            6.99              3         +              Normal
  06/02/2025 12 AM PDT            6.99              3         0              Normal
  06/02/2025 01 AM PDT            6.98              3         -              Normal
  06/02/2025 02 AM PDT            6.98              3         0              Normal
  06/02/2025 03 AM PDT            6.98              3         0              Normal
  06/02/2025 04 AM PDT            6.98              3         0              Normal
  06/02/2025 05 AM PDT            6.97              3         -              Normal
  06/02/2025 06 AM PDT            6.97              3         0              Normal
  06/02/2025 07 AM PDT            6.97              3         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  06/02/2025 08 AM PDT            6.97              3                        Normal
  06/02/2025 09 AM PDT            6.97              3         0              Normal
  06/02/2025 10 AM PDT            6.97              3         0              Normal
  06/02/2025 11 AM PDT            6.97              3         0              Normal
  06/02/2025 12 PM PDT            6.97              3         0              Normal
  06/02/2025 01 PM PDT            6.97              3         0              Normal
  06/02/2025 02 PM PDT            6.97              3         0              Normal
  06/02/2025 03 PM PDT            6.97              3         0              Normal
  06/02/2025 04 PM PDT            6.97              3         0              Normal
  06/02/2025 05 PM PDT            6.97              3         0              Normal
  06/02/2025 06 PM PDT            6.97              3         0              Normal
  06/02/2025 07 PM PDT            6.97              3         0              Normal
  06/02/2025 08 PM PDT            6.97              3         0              Normal
  06/02/2025 09 PM PDT            6.97              3         0              Normal
  06/02/2025 10 PM PDT            6.97              3         0              Normal
  06/02/2025 11 PM PDT            6.97              3         0              Normal
  06/03/2025 12 AM PDT            6.97              3         0              Normal
  06/03/2025 01 AM PDT            6.97              3         0              Normal
  06/03/2025 02 AM PDT            6.97              3         0              Normal
  06/03/2025 03 AM PDT            6.97              3         0              Normal
  06/03/2025 04 AM PDT            6.97              3         0              Normal
  06/03/2025 05 AM PDT            6.97              3         0              Normal
  06/03/2025 06 AM PDT            6.97              3         0              Normal
  06/03/2025 07 AM PDT            6.97              3         0              Normal
  06/03/2025 08 AM PDT            6.97              3         0              Normal
  06/03/2025 09 AM PDT            6.97              3         0              Normal
  06/03/2025 10 AM PDT            6.97              3         0              Normal
  06/03/2025 11 AM PDT            6.97              3         0              Normal
  06/03/2025 12 PM PDT            6.97              3         0              Normal
  06/03/2025 01 PM PDT            6.97              3         0              Normal
  06/03/2025 02 PM PDT            6.97              3         0              Normal
  06/03/2025 03 PM PDT            6.95              2         -              Normal
  06/03/2025 04 PM PDT            6.95              2         0              Normal
  06/03/2025 05 PM PDT            6.95              2         0              Normal
  06/03/2025 06 PM PDT            6.95              2         0              Normal
  06/03/2025 07 PM PDT            6.95              2         0              Normal
  06/03/2025 08 PM PDT            6.95              2         0              Normal
  06/03/2025 09 PM PDT            6.95              2         0              Normal
  06/03/2025 10 PM PDT            6.95              2         0              Normal
  06/03/2025 11 PM PDT            6.95              2         0              Normal
  06/04/2025 12 AM PDT            6.95              2         0              Normal
  06/04/2025 01 AM PDT            6.95              2         0              Normal
  06/04/2025 02 AM PDT            6.95              2         0              Normal
  06/04/2025 03 AM PDT            6.95              2         0              Normal
  06/04/2025 04 AM PDT            6.95              2         0              Normal
  06/04/2025 05 AM PDT            6.95              2         0              Normal
  06/04/2025 06 AM PDT            6.95              2         0              Normal
  06/04/2025 07 AM PDT            6.95              2         0              Normal
  06/04/2025 08 AM PDT            6.95              2         0              Normal
  06/04/2025 09 AM PDT            6.95              2         0              Normal
  06/04/2025 10 AM PDT            6.95              2         0              Normal
  06/04/2025 11 AM PDT            6.95              2         0              Normal
  06/04/2025 12 PM PDT            7.05              5         +              Normal
  06/04/2025 01 PM PDT            7.05              5         0              Normal
  06/04/2025 02 PM PDT            7.07              6         +              Normal
  06/04/2025 03 PM PDT            7.10              7         +              Normal
  06/04/2025 04 PM PDT            7.16             10         +              Normal
  06/04/2025 05 PM PDT            7.22             14         +              Normal
  06/04/2025 06 PM PDT            7.24             15         +              Normal
  06/04/2025 07 PM PDT            7.24             15         0              Normal
  06/04/2025 08 PM PDT            7.23             15         -              Normal
  06/04/2025 09 PM PDT            7.22             14         -              Normal
  06/04/2025 10 PM PDT            7.20             13         -              Normal
  06/04/2025 11 PM PDT            7.18             11         -              Normal
  06/05/2025 12 AM PDT            7.15             10         -              Normal
  06/05/2025 01 AM PDT            7.13              9         -              Normal
  06/05/2025 02 AM PDT            7.11              8         -              Normal
  06/05/2025 03 AM PDT            7.09              7         -              Normal
  06/05/2025 04 AM PDT            7.07              6         -              Normal
  06/05/2025 05 AM PDT            7.05              5         -              Normal
  06/05/2025 06 AM PDT            7.03              4         -              Normal
  06/05/2025 07 AM PDT            7.02              4         -              Normal
  06/05/2025 08 AM PDT            7.00              3         -              Normal
  06/05/2025 09 AM PDT            6.99              3         -              Normal
  06/05/2025 10 AM PDT            6.97              3         -              Normal
  06/05/2025 11 AM PDT            6.96              2         -              Normal
  06/05/2025 12 PM PDT            6.95              2         -              Normal
  06/05/2025 01 PM PDT            6.95              2         0              Normal
  06/05/2025 02 PM PDT            6.94              2         -              Normal
  06/05/2025 03 PM PDT            6.93              2         -              Normal
  06/05/2025 04 PM PDT            6.93              2         0              Normal
  06/05/2025 05 PM PDT            6.92              2         -              Normal
  06/05/2025 06 PM PDT            6.92              2         0              Normal
  06/05/2025 07 PM PDT            6.92              2         0              Normal
  06/05/2025 08 PM PDT            6.92              2         0              Normal
  06/05/2025 09 PM PDT            6.91              1         -              Normal
  06/05/2025 10 PM PDT            6.91              1         0              Normal
  06/05/2025 11 PM PDT            6.91              1         0              Normal
  06/06/2025 12 AM PDT            6.91              1         0              Normal
  06/06/2025 01 AM PDT            6.91              1         0              Normal
  06/06/2025 02 AM PDT            6.91              1         0              Normal
  06/06/2025 03 AM PDT            6.91              1         0              Normal
  06/06/2025 04 AM PDT            6.91              1         0              Normal
  06/06/2025 05 AM PDT            6.91              1         0              Normal
  06/06/2025 06 AM PDT            6.91              1         0              Normal
  06/06/2025 07 AM PDT            6.91              1         0              Normal
  06/06/2025 08 AM PDT            6.91              1         0              Normal
  06/06/2025 09 AM PDT            6.91              1         0              Normal
  06/06/2025 10 AM PDT            6.91              1         0              Normal
  06/06/2025 11 AM PDT            6.91              1         0              Normal
  06/06/2025 12 PM PDT            6.91              1         0              Normal
  06/06/2025 01 PM PDT            6.91              1         0              Normal
  06/06/2025 02 PM PDT            6.91              1         0              Normal
  06/06/2025 03 PM PDT            6.91              1         0              Normal
  06/06/2025 04 PM PDT            6.91              1         0              Normal
  06/06/2025 05 PM PDT            6.91              1         0              Normal
  06/06/2025 06 PM PDT            6.91              1         0              Normal
  06/06/2025 07 PM PDT            6.91              1         0              Normal
  06/06/2025 08 PM PDT            6.91              1         0              Normal
  06/06/2025 09 PM PDT            6.91              1         0              Normal
  06/06/2025 10 PM PDT            6.91              1         0              Normal
  06/06/2025 11 PM PDT            6.91              1         0              Normal
  06/07/2025 12 AM PDT            6.91              1         0              Normal
  06/07/2025 01 AM PDT            6.91              1         0              Normal
  06/07/2025 02 AM PDT            6.91              1         0              Normal
  06/07/2025 03 AM PDT            6.91              1         0              Normal
  06/07/2025 04 AM PDT            6.91              1         0              Normal
  06/07/2025 05 AM PDT            6.91              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.