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: Jun 20 2025 at 11:22 AM PDTNext Issuance: Jun 21 2025 at 9:00 AM PDT
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:  06/20/2025 at 11:22 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  06/15/2025 at 12:00 PM PDT
# Maximum Observed Stage:                       3.28 Feet
# Maximum Observed Flow:                        465 cfs
#
# Earliest Date & Time of Maximum Forecast:     06/20/2025 at 11:00 AM PDT
# Maximum Forecast Stage:                       3.04 Feet
# Maximum Forecast Flow:                        378 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  06/15/2025 11 AM PDT            3.25            454                        Normal
  06/15/2025 12 PM PDT            3.28            465         +              Normal
  06/15/2025 01 PM PDT            3.27            461         -              Normal
  06/15/2025 02 PM PDT            3.25            454         -              Normal
  06/15/2025 03 PM PDT            3.24            450         -              Normal
  06/15/2025 04 PM PDT            3.23            446         -              Normal
  06/15/2025 05 PM PDT            3.22            442         -              Normal
  06/15/2025 06 PM PDT            3.19            431         -              Normal
  06/15/2025 07 PM PDT            3.18            427         -              Normal
  06/15/2025 08 PM PDT            3.18            427         0              Normal
  06/15/2025 09 PM PDT            3.16            420         -              Normal
  06/15/2025 10 PM PDT            3.14            413         -              Normal
  06/15/2025 11 PM PDT            3.16            420         +              Normal
  06/16/2025 12 AM PDT            3.17            424         +              Normal
  06/16/2025 01 AM PDT            3.18            427         +              Normal
  06/16/2025 02 AM PDT            3.19            431         +              Normal
  06/16/2025 03 AM PDT            3.21            439         +              Normal
  06/16/2025 04 AM PDT            3.22            442         +              Normal
  06/16/2025 05 AM PDT            3.22            442         0              Normal
  06/16/2025 06 AM PDT            3.23            446         +              Normal
  06/16/2025 07 AM PDT            3.23            446         0              Normal
  06/16/2025 08 AM PDT            3.23            446         0              Normal
  06/16/2025 09 AM PDT            3.23            446         0              Normal
  06/16/2025 10 AM PDT            3.23            446         0              Normal
  06/16/2025 11 AM PDT            3.23            446         0              Normal
  06/16/2025 12 PM PDT            3.21            439         -              Normal
  06/16/2025 01 PM PDT            3.21            439         0              Normal
  06/16/2025 02 PM PDT            3.19            431         -              Normal
  06/16/2025 03 PM PDT            3.18            427         -              Normal
  06/16/2025 04 PM PDT            3.18            427         0              Normal
  06/16/2025 05 PM PDT            3.17            424         -              Normal
  06/16/2025 06 PM PDT            3.18            427         +              Normal
  06/16/2025 07 PM PDT            3.19            431         +              Normal
  06/16/2025 08 PM PDT            3.20            435         +              Normal
  06/16/2025 09 PM PDT            3.21            439         +              Normal
  06/16/2025 10 PM PDT            3.22            442         +              Normal
  06/16/2025 11 PM PDT            3.22            442         0              Normal
  06/17/2025 12 AM PDT            3.22            442         0              Normal
  06/17/2025 01 AM PDT            3.22            442         0              Normal
  06/17/2025 02 AM PDT            3.22            442         0              Normal
  06/17/2025 03 AM PDT            3.22            442         0              Normal
  06/17/2025 04 AM PDT            3.21            439         -              Normal
  06/17/2025 05 AM PDT            3.21            439         0              Normal
  06/17/2025 06 AM PDT            3.20            435         -              Normal
  06/17/2025 07 AM PDT            3.19            431         -              Normal
  06/17/2025 08 AM PDT            3.17            424         -              Normal
  06/17/2025 09 AM PDT            3.16            420         -              Normal
  06/17/2025 10 AM PDT            3.15            416         -              Normal
  06/17/2025 11 AM PDT            3.14            413         -              Normal
  06/17/2025 12 PM PDT            3.13            409         -              Normal
  06/17/2025 01 PM PDT            3.12            406         -              Normal
  06/17/2025 02 PM PDT            3.10            399         -              Normal
  06/17/2025 03 PM PDT            3.10            399         0              Normal
  06/17/2025 04 PM PDT            3.09            395         -              Normal
  06/17/2025 05 PM PDT            3.09            395         0              Normal
  06/17/2025 06 PM PDT            3.10            399         +              Normal
  06/17/2025 07 PM PDT            3.11            402         +              Normal
  06/17/2025 08 PM PDT            3.12            406         +              Normal
  06/17/2025 09 PM PDT            3.13            409         +              Normal
  06/17/2025 10 PM PDT            3.14            413         +              Normal
  06/17/2025 11 PM PDT            3.15            416         +              Normal
  06/18/2025 12 AM PDT            3.15            416         0              Normal
  06/18/2025 01 AM PDT            3.15            416         0              Normal
  06/18/2025 02 AM PDT            3.15            416         0              Normal
  06/18/2025 03 AM PDT            3.15            416         0              Normal
  06/18/2025 04 AM PDT            3.15            416         0              Normal
  06/18/2025 05 AM PDT            3.14            413         -              Normal
  06/18/2025 06 AM PDT            3.13            409         -              Normal
  06/18/2025 07 AM PDT            3.12            406         -              Normal
  06/18/2025 08 AM PDT            3.10            399         -              Normal
  06/18/2025 09 AM PDT            3.09            395         -              Normal
  06/18/2025 10 AM PDT            3.08            392         -              Normal
  06/18/2025 11 AM PDT            3.07            388         -              Normal
  06/18/2025 12 PM PDT            3.05            381         -              Normal
  06/18/2025 01 PM PDT            3.04            378         -              Normal
  06/18/2025 02 PM PDT            3.05            381         +              Normal
  06/18/2025 03 PM PDT            3.05            381         0              Normal
  06/18/2025 04 PM PDT            3.05            381         0              Normal
  06/18/2025 05 PM PDT            3.04            378         -              Normal
  06/18/2025 06 PM PDT            3.04            378         0              Normal
  06/18/2025 07 PM PDT            3.02            371         -              Normal
  06/18/2025 08 PM PDT            3.02            371         0              Normal
  06/18/2025 09 PM PDT            3.00            364         -              Normal
  06/18/2025 10 PM PDT            3.01            367         +              Normal
  06/18/2025 11 PM PDT            2.98            357         -              Normal
  06/19/2025 12 AM PDT            3.01            367         +              Normal
  06/19/2025 01 AM PDT            3.00            364         -              Normal
  06/19/2025 02 AM PDT            3.02            371         +              Normal
  06/19/2025 03 AM PDT            3.04            378         +              Normal
  06/19/2025 04 AM PDT            3.04            378         0              Normal
  06/19/2025 05 AM PDT            3.07            388         +              Normal
  06/19/2025 06 AM PDT            3.06            385         -              Normal
  06/19/2025 07 AM PDT            3.09            395         +              Normal
  06/19/2025 08 AM PDT            3.12            406         +              Normal
  06/19/2025 09 AM PDT            3.13            409         +              Normal
  06/19/2025 10 AM PDT            3.17            424         +              Normal
  06/19/2025 11 AM PDT            3.16            420         -              Normal
  06/19/2025 12 PM PDT            3.16            420         0              Normal
  06/19/2025 01 PM PDT            3.18            427         +              Normal
  06/19/2025 02 PM PDT            3.18            427         0              Normal
  06/19/2025 03 PM PDT            3.19            431         +              Normal
  06/19/2025 04 PM PDT            3.16            420         -              Normal
  06/19/2025 05 PM PDT            3.17            424         +              Normal
  06/19/2025 06 PM PDT            3.13            409         -              Normal
  06/19/2025 07 PM PDT            3.12            406         -              Normal
  06/19/2025 08 PM PDT            3.12            406         0              Normal
  06/19/2025 09 PM PDT            3.12            406         0              Normal
  06/19/2025 10 PM PDT            3.09            395         -              Normal
  06/19/2025 11 PM PDT            3.10            399         +              Normal
  06/20/2025 12 AM PDT            3.09            395         -              Normal
  06/20/2025 01 AM PDT            3.10            399         +              Normal
  06/20/2025 02 AM PDT            3.09            395         -              Normal
  06/20/2025 03 AM PDT            3.09            395         0              Normal
  06/20/2025 04 AM PDT            3.10            399         +              Normal
  06/20/2025 05 AM PDT            3.10            399         0              Normal
  06/20/2025 06 AM PDT            3.09            395         -              Normal
  06/20/2025 07 AM PDT            3.08            392         -              Normal
  06/20/2025 08 AM PDT            3.07            388         -              Normal
  06/20/2025 09 AM PDT            3.06            385         -              Normal
  06/20/2025 10 AM PDT            3.05            381         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  06/20/2025 11 AM PDT            3.04            378                        Normal
  06/20/2025 12 PM PDT            3.03            374         -              Normal
  06/20/2025 01 PM PDT            3.02            371         -              Normal
  06/20/2025 02 PM PDT            3.00            364         -              Normal
  06/20/2025 03 PM PDT            3.00            364         0              Normal
  06/20/2025 04 PM PDT            2.99            361         -              Normal
  06/20/2025 05 PM PDT            2.99            361         0              Normal
  06/20/2025 06 PM PDT            3.00            364         +              Normal
  06/20/2025 07 PM PDT            3.01            367         +              Normal
  06/20/2025 08 PM PDT            3.02            371         +              Normal
  06/20/2025 09 PM PDT            3.03            374         +              Normal
  06/20/2025 10 PM PDT            3.04            378         +              Normal
  06/20/2025 11 PM PDT            3.04            378         0              Normal
  06/21/2025 12 AM PDT            3.04            378         0              Normal
  06/21/2025 01 AM PDT            3.04            378         0              Normal
  06/21/2025 02 AM PDT            3.04            378         0              Normal
  06/21/2025 03 AM PDT            3.04            378         0              Normal
  06/21/2025 04 AM PDT            3.04            378         0              Normal
  06/21/2025 05 AM PDT            3.03            374         -              Normal
  06/21/2025 06 AM PDT            3.02            371         -              Normal
  06/21/2025 07 AM PDT            3.00            364         -              Normal
  06/21/2025 08 AM PDT            2.99            361         -              Normal
  06/21/2025 09 AM PDT            2.97            354         -              Normal
  06/21/2025 10 AM PDT            2.96            351         -              Normal
  06/21/2025 11 AM PDT            2.94            344         -              Normal
  06/21/2025 12 PM PDT            2.93            341         -              Normal
  06/21/2025 01 PM PDT            2.91            335         -              Normal
  06/21/2025 02 PM PDT            2.89            328         -              Normal
  06/21/2025 03 PM PDT            2.88            325         -              Normal
  06/21/2025 04 PM PDT            2.87            322         -              Normal
  06/21/2025 05 PM PDT            2.86            319         -              Normal
  06/21/2025 06 PM PDT            2.86            319         0              Normal
  06/21/2025 07 PM PDT            2.86            319         0              Normal
  06/21/2025 08 PM PDT            2.87            322         +              Normal
  06/21/2025 09 PM PDT            2.87            322         0              Normal
  06/21/2025 10 PM PDT            2.87            322         0              Normal
  06/21/2025 11 PM PDT            2.87            322         0              Normal
  06/22/2025 12 AM PDT            2.86            319         -              Normal
  06/22/2025 01 AM PDT            2.86            319         0              Normal
  06/22/2025 02 AM PDT            2.85            316         -              Normal
  06/22/2025 03 AM PDT            2.85            316         0              Normal
  06/22/2025 04 AM PDT            2.84            313         -              Normal
  06/22/2025 05 AM PDT            2.83            309         -              Normal
  06/22/2025 06 AM PDT            2.82            306         -              Normal
  06/22/2025 07 AM PDT            2.81            303         -              Normal
  06/22/2025 08 AM PDT            2.80            300         -              Normal
  06/22/2025 09 AM PDT            2.79            297         -              Normal
  06/22/2025 10 AM PDT            2.78            294         -              Normal
  06/22/2025 11 AM PDT            2.77            291         -              Normal
  06/22/2025 12 PM PDT            2.76            288         -              Normal
  06/22/2025 01 PM PDT            2.75            285         -              Normal
  06/22/2025 02 PM PDT            2.74            282         -              Normal
  06/22/2025 03 PM PDT            2.73            280         -              Normal
  06/22/2025 04 PM PDT            2.73            280         0              Normal
  06/22/2025 05 PM PDT            2.72            277         -              Normal
  06/22/2025 06 PM PDT            2.73            280         +              Normal
  06/22/2025 07 PM PDT            2.73            280         0              Normal
  06/22/2025 08 PM PDT            2.74            282         +              Normal
  06/22/2025 09 PM PDT            2.74            282         0              Normal
  06/22/2025 10 PM PDT            2.75            285         +              Normal
  06/22/2025 11 PM PDT            2.75            285         0              Normal
  06/23/2025 12 AM PDT            2.75            285         0              Normal
  06/23/2025 01 AM PDT            2.74            282         -              Normal
  06/23/2025 02 AM PDT            2.74            282         0              Normal
  06/23/2025 03 AM PDT            2.74            282         0              Normal
  06/23/2025 04 AM PDT            2.74            282         0              Normal
  06/23/2025 05 AM PDT            2.73            280         -              Normal
  06/23/2025 06 AM PDT            2.72            277         -              Normal
  06/23/2025 07 AM PDT            2.71            274         -              Normal
  06/23/2025 08 AM PDT            2.71            274         0              Normal
  06/23/2025 09 AM PDT            2.70            271         -              Normal
  06/23/2025 10 AM PDT            2.69            268         -              Normal
  06/23/2025 11 AM PDT            2.68            265         -              Normal
  06/23/2025 12 PM PDT            2.67            262         -              Normal
  06/23/2025 01 PM PDT            2.66            260         -              Normal
  06/23/2025 02 PM PDT            2.65            257         -              Normal
  06/23/2025 03 PM PDT            2.65            257         0              Normal
  06/23/2025 04 PM PDT            2.65            257         0              Normal
  06/23/2025 05 PM PDT            2.64            254         -              Normal
  06/23/2025 06 PM PDT            2.65            257         +              Normal
  06/23/2025 07 PM PDT            2.66            260         +              Normal
  06/23/2025 08 PM PDT            2.67            262         +              Normal
  06/23/2025 09 PM PDT            2.68            265         +              Normal
  06/23/2025 10 PM PDT            2.69            268         +              Normal
  06/23/2025 11 PM PDT            2.70            271         +              Normal
  06/24/2025 12 AM PDT            2.70            271         0              Normal
  06/24/2025 01 AM PDT            2.71            274         +              Normal
  06/24/2025 02 AM PDT            2.71            274         0              Normal
  06/24/2025 03 AM PDT            2.72            277         +              Normal
  06/24/2025 04 AM PDT            2.72            277         0              Normal
  06/24/2025 05 AM PDT            2.72            277         0              Normal
  06/24/2025 06 AM PDT            2.72            277         0              Normal
  06/24/2025 07 AM PDT            2.71            274         -              Normal
  06/24/2025 08 AM PDT            2.70            271         -              Normal
  06/24/2025 09 AM PDT            2.70            271         0              Normal
  06/24/2025 10 AM PDT            2.69            268         -              Normal
  06/24/2025 11 AM PDT            2.68            265         -              Normal
  06/24/2025 12 PM PDT            2.67            262         -              Normal
  06/24/2025 01 PM PDT            2.67            262         0              Normal
  06/24/2025 02 PM PDT            2.66            260         -              Normal
  06/24/2025 03 PM PDT            2.65            257         -              Normal
  06/24/2025 04 PM PDT            2.65            257         0              Normal
  06/24/2025 05 PM PDT            2.65            257         0              Normal
  06/24/2025 06 PM PDT            2.67            262         +              Normal
  06/24/2025 07 PM PDT            2.69            268         +              Normal
  06/24/2025 08 PM PDT            2.71            274         +              Normal
  06/24/2025 09 PM PDT            2.73            280         +              Normal
  06/24/2025 10 PM PDT            2.75            285         +              Normal
  06/24/2025 11 PM PDT            2.77            291         +              Normal
  06/25/2025 12 AM PDT            2.79            297         +              Normal
  06/25/2025 01 AM PDT            2.80            300         +              Normal
  06/25/2025 02 AM PDT            2.81            303         +              Normal
  06/25/2025 03 AM PDT            2.83            309         +              Normal
  06/25/2025 04 AM PDT            2.84            313         +              Normal
  06/25/2025 05 AM PDT            2.85            316         +              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.