MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
Latitude: 37.73º NLongitude: 119.56º WElevation: 4017 FeetForecast Type: Official Location
Location: Mariposa County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Mar 02 2026 at 7:28 AM PSTNext Issuance: Mar 02 2026 at 3:00 PM PST
Action/Monitor: N/A Minor Flood: 7.5 FeetModerate Flood: 10.0 FeetMajor Flood: 13.27 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Merced River - Yosemite NP at Happy Isles (HPIC1)
#
# File Generation Time:  03/02/2026 at 07:28 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/01/2026 at 01:00 AM PST
# Maximum Observed Stage:                       3.99 Feet
# Maximum Observed Flow:                        785 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/02/2026 at 09:00 PM PST
# Maximum Forecast Stage:                       3.69 Feet
# Maximum Forecast Flow:                        639 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  02/25/2026 07 AM PST            2.92            340                        Normal
  02/25/2026 08 AM PST            2.91            336         -              Normal
  02/25/2026 09 AM PST            2.93            343         +              Normal
  02/25/2026 10 AM PST            2.93            343         0              Normal
  02/25/2026 11 AM PST            2.97            356         +              Normal
  02/25/2026 12 PM PST            2.96            353         -              Normal
  02/25/2026 01 PM PST            3.00            366         +              Normal
  02/25/2026 02 PM PST            3.03            376         +              Normal
  02/25/2026 03 PM PST            3.06            386         +              Normal
  02/25/2026 04 PM PST            3.12            407         +              Normal
  02/25/2026 05 PM PST            3.18            429         +              Normal
  02/25/2026 06 PM PST            3.23            448         +              Normal
  02/25/2026 07 PM PST            3.30            474         +              Normal
  02/25/2026 08 PM PST            3.33            486         +              Normal
  02/25/2026 09 PM PST            3.39            510         +              Normal
  02/25/2026 10 PM PST            3.44            531         +              Normal
  02/25/2026 11 PM PST            3.45            535         +              Normal
  02/26/2026 12 AM PST            3.46            539         +              Normal
  02/26/2026 01 AM PST            3.48            547         +              Normal
  02/26/2026 02 AM PST            3.52            564         +              Normal
  02/26/2026 03 AM PST            3.51            560         -              Normal
  02/26/2026 04 AM PST            3.49            551         -              Normal
  02/26/2026 05 AM PST            3.53            568         +              Normal
  02/26/2026 06 AM PST            3.52            564         -              Normal
  02/26/2026 07 AM PST            3.48            547         -              Normal
  02/26/2026 08 AM PST            3.47            543         -              Normal
  02/26/2026 09 AM PST            3.45            535         -              Normal
  02/26/2026 10 AM PST            3.46            539         +              Normal
  02/26/2026 11 AM PST            3.45            535         -              Normal
  02/26/2026 12 PM PST            3.42            522         -              Normal
  02/26/2026 01 PM PST            3.45            535         +              Normal
  02/26/2026 02 PM PST            3.46            539         +              Normal
  02/26/2026 03 PM PST            3.51            560         +              Normal
  02/26/2026 04 PM PST            3.52            564         +              Normal
  02/26/2026 05 PM PST            3.54            573         +              Normal
  02/26/2026 06 PM PST            3.57            586         +              Normal
  02/26/2026 07 PM PST            3.63            612         +              Normal
  02/26/2026 08 PM PST            3.65            621         +              Normal
  02/26/2026 09 PM PST            3.66            626         +              Normal
  02/26/2026 10 PM PST            3.67            630         +              Normal
  02/26/2026 11 PM PST            3.69            639         +              Normal
  02/27/2026 12 AM PST            3.69            639         0              Normal
  02/27/2026 01 AM PST            3.66            626         -              Normal
  02/27/2026 02 AM PST            3.67            630         +              Normal
  02/27/2026 03 AM PST            3.68            635         +              Normal
  02/27/2026 04 AM PST            3.68            635         0              Normal
  02/27/2026 05 AM PST            3.63            612         -              Normal
  02/27/2026 06 AM PST            3.64            617         +              Normal
  02/27/2026 07 AM PST            3.62            608         -              Normal
  02/27/2026 08 AM PST            3.61            603         -              Normal
  02/27/2026 09 AM PST            3.59            594         -              Normal
  02/27/2026 10 AM PST            3.55            577         -              Normal
  02/27/2026 11 AM PST            3.53            568         -              Normal
  02/27/2026 12 PM PST            3.53            568         0              Normal
  02/27/2026 01 PM PST            3.55            577         +              Normal
  02/27/2026 02 PM PST            3.53            568         -              Normal
  02/27/2026 03 PM PST            3.57            586         +              Normal
  02/27/2026 04 PM PST            3.56            581         -              Normal
  02/27/2026 05 PM PST            3.58            590         +              Normal
  02/27/2026 06 PM PST            3.62            608         +              Normal
  02/27/2026 07 PM PST            3.67            630         +              Normal
  02/27/2026 08 PM PST            3.69            639         +              Normal
  02/27/2026 09 PM PST            3.75            667         +              Normal
  02/27/2026 10 PM PST            3.77            677         +              Normal
  02/27/2026 11 PM PST            3.79            686         +              Normal
  02/28/2026 12 AM PST            3.81            696         +              Normal
  02/28/2026 01 AM PST            3.80            691         -              Normal
  02/28/2026 02 AM PST            3.79            686         -              Normal
  02/28/2026 03 AM PST            3.77            677         -              Normal
  02/28/2026 04 AM PST            3.76            672         -              Normal
  02/28/2026 05 AM PST            3.80            691         +              Normal
  02/28/2026 06 AM PST            3.74            663         -              Normal
  02/28/2026 07 AM PST            3.78            681         +              Normal
  02/28/2026 08 AM PST            3.75            667         -              Normal
  02/28/2026 09 AM PST            3.73            658         -              Normal
  02/28/2026 10 AM PST            3.72            653         -              Normal
  02/28/2026 11 AM PST            3.70            644         -              Normal
  02/28/2026 12 PM PST            3.66            626         -              Normal
  02/28/2026 01 PM PST            3.68            635         +              Normal
  02/28/2026 02 PM PST            3.69            639         +              Normal
  02/28/2026 03 PM PST            3.71            649         +              Normal
  02/28/2026 04 PM PST            3.75            667         +              Normal
  02/28/2026 05 PM PST            3.75            667         0              Normal
  02/28/2026 06 PM PST            3.83            705         +              Normal
  02/28/2026 07 PM PST            3.90            740         +              Normal
  02/28/2026 08 PM PST            3.95            765         +              Normal
  02/28/2026 09 PM PST            3.98            780         +              Normal
  02/28/2026 10 PM PST            3.99            785         +              Normal
  02/28/2026 11 PM PST            3.97            775         -              Normal
  03/01/2026 12 AM PST            3.99            785         +              Normal
  03/01/2026 01 AM PST            3.99            785         0              Normal
  03/01/2026 02 AM PST            3.98            780         -              Normal
  03/01/2026 03 AM PST            3.95            765         -              Normal
  03/01/2026 04 AM PST            3.94            760         -              Normal
  03/01/2026 05 AM PST            3.90            740         -              Normal
  03/01/2026 06 AM PST            3.91            745         +              Normal
  03/01/2026 07 AM PST            3.87            725         -              Normal
  03/01/2026 08 AM PST            3.85            715         -              Normal
  03/01/2026 09 AM PST            3.84            710         -              Normal
  03/01/2026 10 AM PST            3.82            700         -              Normal
  03/01/2026 11 AM PST            3.79            686         -              Normal
  03/01/2026 12 PM PST            3.81            696         +              Normal
  03/01/2026 01 PM PST            3.79            686         -              Normal
  03/01/2026 02 PM PST            3.75            667         -              Normal
  03/01/2026 03 PM PST            3.76            672         +              Normal
  03/01/2026 04 PM PST            3.76            672         0              Normal
  03/01/2026 05 PM PST            3.77            677         +              Normal
  03/01/2026 06 PM PST            3.78            681         +              Normal
  03/01/2026 07 PM PST            3.75            667         -              Normal
  03/01/2026 08 PM PST            3.74            663         -              Normal
  03/01/2026 09 PM PST            3.72            653         -              Normal
  03/01/2026 10 PM PST            3.70            644         -              Normal
  03/01/2026 11 PM PST            3.71            649         +              Normal
  03/02/2026 12 AM PST            3.70            644         -              Normal
  03/02/2026 01 AM PST            3.68            635         -              Normal
  03/02/2026 02 AM PST            3.69            639         +              Normal
  03/02/2026 03 AM PST            3.67            630         -              Normal
  03/02/2026 04 AM PST            3.65            621         -              Normal
  03/02/2026 05 AM PST            3.64            617         -              Normal
  03/02/2026 06 AM PST            3.63            612         -              Normal
  03/02/2026 07 AM PST            3.61            603         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/02/2026 08 AM PST            3.60            599                        Normal
  03/02/2026 09 AM PST            3.58            590         -              Normal
  03/02/2026 10 AM PST            3.56            581         -              Normal
  03/02/2026 11 AM PST            3.56            581         0              Normal
  03/02/2026 12 PM PST            3.55            577         -              Normal
  03/02/2026 01 PM PST            3.56            581         +              Normal
  03/02/2026 02 PM PST            3.56            581         0              Normal
  03/02/2026 03 PM PST            3.60            599         +              Normal
  03/02/2026 04 PM PST            3.61            603         +              Normal
  03/02/2026 05 PM PST            3.63            612         +              Normal
  03/02/2026 06 PM PST            3.65            621         +              Normal
  03/02/2026 07 PM PST            3.67            630         +              Normal
  03/02/2026 08 PM PST            3.68            635         +              Normal
  03/02/2026 09 PM PST            3.69            639         +              Normal
  03/02/2026 10 PM PST            3.69            639         0              Normal
  03/02/2026 11 PM PST            3.68            635         -              Normal
  03/03/2026 12 AM PST            3.67            630         -              Normal
  03/03/2026 01 AM PST            3.65            621         -              Normal
  03/03/2026 02 AM PST            3.63            612         -              Normal
  03/03/2026 03 AM PST            3.61            603         -              Normal
  03/03/2026 04 AM PST            3.59            594         -              Normal
  03/03/2026 05 AM PST            3.57            586         -              Normal
  03/03/2026 06 AM PST            3.55            577         -              Normal
  03/03/2026 07 AM PST            3.53            568         -              Normal
  03/03/2026 08 AM PST            3.51            560         -              Normal
  03/03/2026 09 AM PST            3.49            551         -              Normal
  03/03/2026 10 AM PST            3.46            539         -              Normal
  03/03/2026 11 AM PST            3.44            531         -              Normal
  03/03/2026 12 PM PST            3.42            522         -              Normal
  03/03/2026 01 PM PST            3.41            518         -              Normal
  03/03/2026 02 PM PST            3.40            514         -              Normal
  03/03/2026 03 PM PST            3.41            518         +              Normal
  03/03/2026 04 PM PST            3.42            522         +              Normal
  03/03/2026 05 PM PST            3.42            522         0              Normal
  03/03/2026 06 PM PST            3.43            526         +              Normal
  03/03/2026 07 PM PST            3.44            531         +              Normal
  03/03/2026 08 PM PST            3.44            531         0              Normal
  03/03/2026 09 PM PST            3.43            526         -              Normal
  03/03/2026 10 PM PST            3.43            526         0              Normal
  03/03/2026 11 PM PST            3.42            522         -              Normal
  03/04/2026 12 AM PST            3.41            518         -              Normal
  03/04/2026 01 AM PST            3.40            514         -              Normal
  03/04/2026 02 AM PST            3.39            510         -              Normal
  03/04/2026 03 AM PST            3.37            502         -              Normal
  03/04/2026 04 AM PST            3.36            498         -              Normal
  03/04/2026 05 AM PST            3.36            498         0              Normal
  03/04/2026 06 AM PST            3.36            498         0              Normal
  03/04/2026 07 AM PST            3.35            494         -              Normal
  03/04/2026 08 AM PST            3.35            494         0              Normal
  03/04/2026 09 AM PST            3.35            494         0              Normal
  03/04/2026 10 AM PST            3.34            490         -              Normal
  03/04/2026 11 AM PST            3.34            490         0              Normal
  03/04/2026 12 PM PST            3.34            490         0              Normal
  03/04/2026 01 PM PST            3.36            498         +              Normal
  03/04/2026 02 PM PST            3.37            502         +              Normal
  03/04/2026 03 PM PST            3.41            518         +              Normal
  03/04/2026 04 PM PST            3.43            526         +              Normal
  03/04/2026 05 PM PST            3.45            535         +              Normal
  03/04/2026 06 PM PST            3.46            539         +              Normal
  03/04/2026 07 PM PST            3.48            547         +              Normal
  03/04/2026 08 PM PST            3.49            551         +              Normal
  03/04/2026 09 PM PST            3.50            556         +              Normal
  03/04/2026 10 PM PST            3.50            556         0              Normal
  03/04/2026 11 PM PST            3.49            551         -              Normal
  03/05/2026 12 AM PST            3.48            547         -              Normal
  03/05/2026 01 AM PST            3.47            543         -              Normal
  03/05/2026 02 AM PST            3.46            539         -              Normal
  03/05/2026 03 AM PST            3.44            531         -              Normal
  03/05/2026 04 AM PST            3.43            526         -              Normal
  03/05/2026 05 AM PST            3.42            522         -              Normal
  03/05/2026 06 AM PST            3.41            518         -              Normal
  03/05/2026 07 AM PST            3.39            510         -              Normal
  03/05/2026 08 AM PST            3.38            506         -              Normal
  03/05/2026 09 AM PST            3.37            502         -              Normal
  03/05/2026 10 AM PST            3.35            494         -              Normal
  03/05/2026 11 AM PST            3.34            490         -              Normal
  03/05/2026 12 PM PST            3.33            486         -              Normal
  03/05/2026 01 PM PST            3.32            482         -              Normal
  03/05/2026 02 PM PST            3.32            482         0              Normal
  03/05/2026 03 PM PST            3.33            486         +              Normal
  03/05/2026 04 PM PST            3.33            486         0              Normal
  03/05/2026 05 PM PST            3.34            490         +              Normal
  03/05/2026 06 PM PST            3.34            490         0              Normal
  03/05/2026 07 PM PST            3.34            490         0              Normal
  03/05/2026 08 PM PST            3.35            494         +              Normal
  03/05/2026 09 PM PST            3.34            490         -              Normal
  03/05/2026 10 PM PST            3.33            486         -              Normal
  03/05/2026 11 PM PST            3.32            482         -              Normal
  03/06/2026 12 AM PST            3.31            478         -              Normal
  03/06/2026 01 AM PST            3.29            471         -              Normal
  03/06/2026 02 AM PST            3.28            467         -              Normal
  03/06/2026 03 AM PST            3.26            459         -              Normal
  03/06/2026 04 AM PST            3.25            455         -              Normal
  03/06/2026 05 AM PST            3.23            448         -              Normal
  03/06/2026 06 AM PST            3.21            440         -              Normal
  03/06/2026 07 AM PST            3.20            437         -              Normal
  03/06/2026 08 AM PST            3.18            429         -              Normal
  03/06/2026 09 AM PST            3.17            425         -              Normal
  03/06/2026 10 AM PST            3.15            418         -              Normal
  03/06/2026 11 AM PST            3.14            415         -              Normal
  03/06/2026 12 PM PST            3.13            411         -              Normal
  03/06/2026 01 PM PST            3.13            411         0              Normal
  03/06/2026 02 PM PST            3.12            407         -              Normal
  03/06/2026 03 PM PST            3.13            411         +              Normal
  03/06/2026 04 PM PST            3.14            415         +              Normal
  03/06/2026 05 PM PST            3.15            418         +              Normal
  03/06/2026 06 PM PST            3.15            418         0              Normal
  03/06/2026 07 PM PST            3.16            422         +              Normal
  03/06/2026 08 PM PST            3.16            422         0              Normal
  03/06/2026 09 PM PST            3.16            422         0              Normal
  03/06/2026 10 PM PST            3.16            422         0              Normal
  03/06/2026 11 PM PST            3.16            422         0              Normal
  03/07/2026 12 AM PST            3.15            418         -              Normal
  03/07/2026 01 AM PST            3.14            415         -              Normal
  03/07/2026 02 AM PST            3.13            411         -              Normal
  03/07/2026 03 AM PST            3.12            407         -              Normal
  03/07/2026 04 AM PST            3.12            407         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.