MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
Latitude: 37.73º NLongitude: 119.56º WElevation: 4017 Feet
Location: Mariposa County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jan 06 2026 at 1:42 PM PSTNext Issuance: Jan 07 2026 at 9:00 AM 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:  01/06/2026 at 01:43 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  01/01/2026 at 06:00 PM PST
# Maximum Observed Stage:                       4.25 Feet
# Maximum Observed Flow:                        914 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/06/2026 at 02:00 PM PST
# Maximum Forecast Stage:                       2.87 Feet
# Maximum Forecast Flow:                        299 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  01/01/2026 01 PM PST            4.09            824                        Normal
  01/01/2026 02 PM PST            4.22            897         +              Normal
  01/01/2026 03 PM PST            4.22            897         0              Normal
  01/01/2026 04 PM PST            4.22            897         0              Normal
  01/01/2026 05 PM PST            4.22            897         0              Normal
  01/01/2026 06 PM PST            4.25            914         +              Normal
  01/01/2026 07 PM PST            4.18            874         -              Normal
  01/01/2026 08 PM PST            4.19            880         +              Normal
  01/01/2026 09 PM PST            4.14            851         -              Normal
  01/01/2026 10 PM PST            4.07            813         -              Normal
  01/01/2026 11 PM PST            4.06            807         -              Normal
  01/02/2026 12 AM PST            4.00            775         -              Normal
  01/02/2026 01 AM PST            3.98            764         -              Normal
  01/02/2026 02 AM PST            3.91            728         -              Normal
  01/02/2026 03 AM PST            3.84            693         -              Normal
  01/02/2026 04 AM PST            3.83            688         -              Normal
  01/02/2026 05 AM PST            3.80            673         -              Normal
  01/02/2026 06 AM PST            3.74            644         -              Normal
  01/02/2026 07 AM PST            3.71            629         -              Normal
  01/02/2026 08 AM PST            3.68            615         -              Normal
  01/02/2026 09 AM PST            3.62            587         -              Normal
  01/02/2026 10 AM PST            3.60            578         -              Normal
  01/02/2026 11 AM PST            3.59            574         -              Normal
  01/02/2026 12 PM PST            3.57            565         -              Normal
  01/02/2026 01 PM PST            3.53            547         -              Normal
  01/02/2026 02 PM PST            3.50            534         -              Normal
  01/02/2026 03 PM PST            3.48            525         -              Normal
  01/02/2026 04 PM PST            3.47            521         -              Normal
  01/02/2026 05 PM PST            3.43            504         -              Normal
  01/02/2026 06 PM PST            3.42            500         -              Normal
  01/02/2026 07 PM PST            3.39            488         -              Normal
  01/02/2026 08 PM PST            3.38            484         -              Normal
  01/02/2026 09 PM PST            3.34            467         -              Normal
  01/02/2026 10 PM PST            3.32            459         -              Normal
  01/02/2026 11 PM PST            3.31            455         -              Normal
  01/03/2026 12 AM PST            3.30            451         -              Normal
  01/03/2026 01 AM PST            3.28            444         -              Normal
  01/03/2026 02 AM PST            3.29            448         +              Normal
  01/03/2026 03 AM PST            3.29            448         0              Normal
  01/03/2026 04 AM PST            3.29            448         0              Normal
  01/03/2026 05 AM PST            3.34            467         +              Normal
  01/03/2026 06 AM PST            3.38            484         +              Normal
  01/03/2026 07 AM PST            3.43            504         +              Normal
  01/03/2026 08 AM PST            3.50            534         +              Normal
  01/03/2026 09 AM PST            3.60            578         +              Normal
  01/03/2026 10 AM PST            3.67            610         +              Normal
  01/03/2026 11 AM PST            3.70            625         +              Normal
  01/03/2026 12 PM PST            3.67            610         -              Normal
  01/03/2026 01 PM PST            3.67            610         0              Normal
  01/03/2026 02 PM PST            3.66            606         -              Normal
  01/03/2026 03 PM PST            3.66            606         0              Normal
  01/03/2026 04 PM PST            3.64            597         -              Normal
  01/03/2026 05 PM PST            3.62            587         -              Normal
  01/03/2026 06 PM PST            3.58            569         -              Normal
  01/03/2026 07 PM PST            3.54            552         -              Normal
  01/03/2026 08 PM PST            3.53            547         -              Normal
  01/03/2026 09 PM PST            3.50            534         -              Normal
  01/03/2026 10 PM PST            3.47            521         -              Normal
  01/03/2026 11 PM PST            3.44            509         -              Normal
  01/04/2026 12 AM PST            3.42            500         -              Normal
  01/04/2026 01 AM PST            3.40            492         -              Normal
  01/04/2026 02 AM PST            3.41            496         +              Normal
  01/04/2026 03 AM PST            3.37            480         -              Normal
  01/04/2026 04 AM PST            3.37            480         0              Normal
  01/04/2026 05 AM PST            3.34            467         -              Normal
  01/04/2026 06 AM PST            3.34            467         0              Normal
  01/04/2026 07 AM PST            3.33            463         -              Normal
  01/04/2026 08 AM PST            3.32            459         -              Normal
  01/04/2026 09 AM PST            3.30            451         -              Normal
  01/04/2026 10 AM PST            3.28            444         -              Normal
  01/04/2026 11 AM PST            3.27            440         -              Normal
  01/04/2026 12 PM PST            3.26            436         -              Normal
  01/04/2026 01 PM PST            3.25            432         -              Normal
  01/04/2026 02 PM PST            3.24            428         -              Normal
  01/04/2026 03 PM PST            3.24            428         0              Normal
  01/04/2026 04 PM PST            3.25            432         +              Normal
  01/04/2026 05 PM PST            3.23            424         -              Normal
  01/04/2026 06 PM PST            3.19            409         -              Normal
  01/04/2026 07 PM PST            3.19            409         0              Normal
  01/04/2026 08 PM PST            3.17            402         -              Normal
  01/04/2026 09 PM PST            3.16            398         -              Normal
  01/04/2026 10 PM PST            3.14            391         -              Normal
  01/04/2026 11 PM PST            3.13            387         -              Normal
  01/05/2026 12 AM PST            3.11            380         -              Normal
  01/05/2026 01 AM PST            3.10            376         -              Normal
  01/05/2026 02 AM PST            3.11            380         +              Normal
  01/05/2026 03 AM PST            3.09            373         -              Normal
  01/05/2026 04 AM PST            3.05            359         -              Normal
  01/05/2026 05 AM PST            3.06            362         +              Normal
  01/05/2026 06 AM PST            3.06            362         0              Normal
  01/05/2026 07 AM PST            3.05            359         -              Normal
  01/05/2026 08 AM PST            3.04            355         -              Normal
  01/05/2026 09 AM PST            3.05            359         +              Normal
  01/05/2026 10 AM PST            3.04            355         -              Normal
  01/05/2026 11 AM PST            3.02            349         -              Normal
  01/05/2026 12 PM PST            3.02            349         0              Normal
  01/05/2026 01 PM PST            3.02            349         0              Normal
  01/05/2026 02 PM PST            3.02            349         0              Normal
  01/05/2026 03 PM PST            3.01            345         -              Normal
  01/05/2026 04 PM PST            3.00            342         -              Normal
  01/05/2026 05 PM PST            3.03            352         +              Normal
  01/05/2026 06 PM PST            2.99            338         -              Normal
  01/05/2026 07 PM PST            2.99            338         0              Normal
  01/05/2026 08 PM PST            2.98            335         -              Normal
  01/05/2026 09 PM PST            2.97            332         -              Normal
  01/05/2026 10 PM PST            2.97            332         0              Normal
  01/05/2026 11 PM PST            2.94            322         -              Normal
  01/06/2026 12 AM PST            2.94            322         0              Normal
  01/06/2026 01 AM PST            2.93            319         -              Normal
  01/06/2026 02 AM PST            2.95            325         +              Normal
  01/06/2026 03 AM PST            2.92            315         -              Normal
  01/06/2026 04 AM PST            2.92            315         0              Normal
  01/06/2026 05 AM PST            2.91            312         -              Normal
  01/06/2026 06 AM PST            2.89            306         -              Normal
  01/06/2026 07 AM PST            2.88            303         -              Normal
  01/06/2026 08 AM PST            2.87            299         -              Normal
  01/06/2026 09 AM PST            2.88            303         +              Normal
  01/06/2026 10 AM PST            2.88            303         0              Normal
  01/06/2026 11 AM PST            2.89            306         +              Normal
  01/06/2026 12 PM PST            2.88            303         -              Normal
  01/06/2026 01 PM PST            2.88            303         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  01/06/2026 02 PM PST            2.87            299                        Normal
  01/06/2026 03 PM PST            2.87            299         0              Normal
  01/06/2026 04 PM PST            2.87            299         0              Normal
  01/06/2026 05 PM PST            2.86            296         -              Normal
  01/06/2026 06 PM PST            2.86            296         0              Normal
  01/06/2026 07 PM PST            2.85            293         -              Normal
  01/06/2026 08 PM PST            2.85            293         0              Normal
  01/06/2026 09 PM PST            2.84            290         -              Normal
  01/06/2026 10 PM PST            2.84            290         0              Normal
  01/06/2026 11 PM PST            2.84            290         0              Normal
  01/07/2026 12 AM PST            2.83            287         -              Normal
  01/07/2026 01 AM PST            2.83            287         0              Normal
  01/07/2026 02 AM PST            2.82            284         -              Normal
  01/07/2026 03 AM PST            2.82            284         0              Normal
  01/07/2026 04 AM PST            2.81            281         -              Normal
  01/07/2026 05 AM PST            2.81            281         0              Normal
  01/07/2026 06 AM PST            2.80            278         -              Normal
  01/07/2026 07 AM PST            2.80            278         0              Normal
  01/07/2026 08 AM PST            2.79            275         -              Normal
  01/07/2026 09 AM PST            2.79            275         0              Normal
  01/07/2026 10 AM PST            2.78            272         -              Normal
  01/07/2026 11 AM PST            2.78            272         0              Normal
  01/07/2026 12 PM PST            2.77            269         -              Normal
  01/07/2026 01 PM PST            2.77            269         0              Normal
  01/07/2026 02 PM PST            2.76            266         -              Normal
  01/07/2026 03 PM PST            2.76            266         0              Normal
  01/07/2026 04 PM PST            2.75            263         -              Normal
  01/07/2026 05 PM PST            2.75            263         0              Normal
  01/07/2026 06 PM PST            2.75            263         0              Normal
  01/07/2026 07 PM PST            2.74            260         -              Normal
  01/07/2026 08 PM PST            2.74            260         0              Normal
  01/07/2026 09 PM PST            2.73            257         -              Normal
  01/07/2026 10 PM PST            2.73            257         0              Normal
  01/07/2026 11 PM PST            2.73            257         0              Normal
  01/08/2026 12 AM PST            2.72            254         -              Normal
  01/08/2026 01 AM PST            2.72            254         0              Normal
  01/08/2026 02 AM PST            2.71            252         -              Normal
  01/08/2026 03 AM PST            2.71            252         0              Normal
  01/08/2026 04 AM PST            2.71            252         0              Normal
  01/08/2026 05 AM PST            2.70            249         -              Normal
  01/08/2026 06 AM PST            2.69            246         -              Normal
  01/08/2026 07 AM PST            2.69            246         0              Normal
  01/08/2026 08 AM PST            2.69            246         0              Normal
  01/08/2026 09 AM PST            2.68            243         -              Normal
  01/08/2026 10 AM PST            2.67            240         -              Normal
  01/08/2026 11 AM PST            2.67            240         0              Normal
  01/08/2026 12 PM PST            2.67            240         0              Normal
  01/08/2026 01 PM PST            2.66            238         -              Normal
  01/08/2026 02 PM PST            2.66            238         0              Normal
  01/08/2026 03 PM PST            2.66            238         0              Normal
  01/08/2026 04 PM PST            2.65            235         -              Normal
  01/08/2026 05 PM PST            2.65            235         0              Normal
  01/08/2026 06 PM PST            2.65            235         0              Normal
  01/08/2026 07 PM PST            2.64            232         -              Normal
  01/08/2026 08 PM PST            2.64            232         0              Normal
  01/08/2026 09 PM PST            2.63            229         -              Normal
  01/08/2026 10 PM PST            2.63            229         0              Normal
  01/08/2026 11 PM PST            2.63            229         0              Normal
  01/09/2026 12 AM PST            2.62            227         -              Normal
  01/09/2026 01 AM PST            2.62            227         0              Normal
  01/09/2026 02 AM PST            2.61            224         -              Normal
  01/09/2026 03 AM PST            2.61            224         0              Normal
  01/09/2026 04 AM PST            2.60            221         -              Normal
  01/09/2026 05 AM PST            2.60            221         0              Normal
  01/09/2026 06 AM PST            2.59            219         -              Normal
  01/09/2026 07 AM PST            2.59            219         0              Normal
  01/09/2026 08 AM PST            2.58            216         -              Normal
  01/09/2026 09 AM PST            2.58            216         0              Normal
  01/09/2026 10 AM PST            2.57            213         -              Normal
  01/09/2026 11 AM PST            2.56            211         -              Normal
  01/09/2026 12 PM PST            2.56            211         0              Normal
  01/09/2026 01 PM PST            2.55            208         -              Normal
  01/09/2026 02 PM PST            2.55            208         0              Normal
  01/09/2026 03 PM PST            2.54            206         -              Normal
  01/09/2026 04 PM PST            2.54            206         0              Normal
  01/09/2026 05 PM PST            2.54            206         0              Normal
  01/09/2026 06 PM PST            2.54            206         0              Normal
  01/09/2026 07 PM PST            2.53            203         -              Normal
  01/09/2026 08 PM PST            2.53            203         0              Normal
  01/09/2026 09 PM PST            2.53            203         0              Normal
  01/09/2026 10 PM PST            2.52            200         -              Normal
  01/09/2026 11 PM PST            2.52            200         0              Normal
  01/10/2026 12 AM PST            2.52            200         0              Normal
  01/10/2026 01 AM PST            2.51            197         -              Normal
  01/10/2026 02 AM PST            2.51            197         0              Normal
  01/10/2026 03 AM PST            2.50            194         -              Normal
  01/10/2026 04 AM PST            2.50            194         0              Normal
  01/10/2026 05 AM PST            2.50            194         0              Normal
  01/10/2026 06 AM PST            2.49            192         -              Normal
  01/10/2026 07 AM PST            2.49            192         0              Normal
  01/10/2026 08 AM PST            2.49            192         0              Normal
  01/10/2026 09 AM PST            2.48            189         -              Normal
  01/10/2026 10 AM PST            2.48            189         0              Normal
  01/10/2026 11 AM PST            2.48            189         0              Normal
  01/10/2026 12 PM PST            2.47            186         -              Normal
  01/10/2026 01 PM PST            2.47            186         0              Normal
  01/10/2026 02 PM PST            2.46            184         -              Normal
  01/10/2026 03 PM PST            2.46            184         0              Normal
  01/10/2026 04 PM PST            2.46            184         0              Normal
  01/10/2026 05 PM PST            2.45            181         -              Normal
  01/10/2026 06 PM PST            2.45            181         0              Normal
  01/10/2026 07 PM PST            2.45            181         0              Normal
  01/10/2026 08 PM PST            2.45            181         0              Normal
  01/10/2026 09 PM PST            2.44            178         -              Normal
  01/10/2026 10 PM PST            2.44            178         0              Normal
  01/10/2026 11 PM PST            2.44            178         0              Normal
  01/11/2026 12 AM PST            2.44            178         0              Normal
  01/11/2026 01 AM PST            2.44            178         0              Normal
  01/11/2026 02 AM PST            2.44            178         0              Normal
  01/11/2026 03 AM PST            2.44            178         0              Normal
  01/11/2026 04 AM PST            2.43            175         -              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.