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MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
| Latitude: 37.73º N | Longitude: 119.56º W | Elevation: 4017 Feet | | Forecast Type: Official Location |
| Location: Mariposa County in California | Bulletin Group: San Joaquin | River Group: San Joaquin |
| Issuance Time: | Oct 28 2026 at 7:36 AM PDT | Next Issuance: | Oct 29 2026 at 9:00 AM PDT
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| Action: N/A | Minor Flood: 7.5 Feet | Moderate Flood: 10.0 Feet | Major Flood: 13.27 Feet |
# Tabular Observed and Forecast Hydrograph Information
#
# Location: Merced River - Yosemite NP at Happy Isles (HPIC1)
#
# File Generation Time: 10/28/2026 at 07:36 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 10/23/2026 at 07:00 AM PDT
# Maximum Observed Stage: 0.85 Feet
# Maximum Observed Flow: 10 cfs
#
# Earliest Date & Time of Maximum Forecast: 11/02/2026 at 12:00 AM PST
# Maximum Forecast Stage: 0.97 Feet
# Maximum Forecast Flow: 14 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
10/23/2026 07 AM PDT 0.85 10 Normal
10/23/2026 08 AM PDT 0.84 10 - Normal
10/23/2026 09 AM PDT 0.84 10 0 Normal
10/23/2026 10 AM PDT 0.83 9 - Normal
10/23/2026 11 AM PDT 0.82 9 - Normal
10/23/2026 12 PM PDT 0.82 9 0 Normal
10/23/2026 01 PM PDT 0.81 9 - Normal
10/23/2026 02 PM PDT 0.81 9 0 Normal
10/23/2026 03 PM PDT 0.81 9 0 Normal
10/23/2026 04 PM PDT 0.81 9 0 Normal
10/23/2026 05 PM PDT 0.80 8 - Normal
10/23/2026 06 PM PDT 0.80 8 0 Normal
10/23/2026 07 PM PDT 0.79 8 - Normal
10/23/2026 08 PM PDT 0.79 8 0 Normal
10/23/2026 09 PM PDT 0.79 8 0 Normal
10/23/2026 10 PM PDT 0.79 8 0 Normal
10/23/2026 11 PM PDT 0.79 8 0 Normal
10/24/2026 12 AM PDT 0.79 8 0 Normal
10/24/2026 01 AM PDT 0.78 8 - Normal
10/24/2026 02 AM PDT 0.78 8 0 Normal
10/24/2026 03 AM PDT 0.78 8 0 Normal
10/24/2026 04 AM PDT 0.78 8 0 Normal
10/24/2026 05 AM PDT 0.77 8 - Normal
10/24/2026 06 AM PDT 0.77 8 0 Normal
10/24/2026 07 AM PDT 0.77 8 0 Normal
10/24/2026 08 AM PDT 0.77 8 0 Normal
10/24/2026 09 AM PDT 0.77 8 0 Normal
10/24/2026 10 AM PDT 0.77 8 0 Normal
10/24/2026 11 AM PDT 0.76 7 - Normal
10/24/2026 12 PM PDT 0.76 7 0 Normal
10/24/2026 01 PM PDT 0.76 7 0 Normal
10/24/2026 02 PM PDT 0.76 7 0 Normal
10/24/2026 03 PM PDT 0.76 7 0 Normal
10/24/2026 04 PM PDT 0.76 7 0 Normal
10/24/2026 05 PM PDT 0.76 7 0 Normal
10/24/2026 06 PM PDT 0.76 7 0 Normal
10/24/2026 07 PM PDT 0.76 7 0 Normal
10/24/2026 08 PM PDT 0.76 7 0 Normal
10/24/2026 09 PM PDT 0.76 7 0 Normal
10/24/2026 10 PM PDT 0.76 7 0 Normal
10/24/2026 11 PM PDT 0.76 7 0 Normal
10/25/2026 12 AM PDT 0.76 7 0 Normal
10/25/2026 01 AM PDT 0.76 7 0 Normal
10/25/2026 02 AM PDT 0.76 7 0 Normal
10/25/2026 03 AM PDT 0.76 7 0 Normal
10/25/2026 04 AM PDT 0.76 7 0 Normal
10/25/2026 05 AM PDT 0.76 7 0 Normal
10/25/2026 06 AM PDT 0.76 7 0 Normal
10/25/2026 07 AM PDT 0.75 7 - Normal
10/25/2026 08 AM PDT 0.76 7 + Normal
10/25/2026 09 AM PDT 0.76 7 0 Normal
10/25/2026 10 AM PDT 0.75 7 - Normal
10/25/2026 11 AM PDT 0.76 7 + Normal
10/25/2026 12 PM PDT 0.76 7 0 Normal
10/25/2026 01 PM PDT 0.75 7 - Normal
10/25/2026 02 PM PDT 0.75 7 0 Normal
10/25/2026 03 PM PDT 0.75 7 0 Normal
10/25/2026 04 PM PDT 0.75 7 0 Normal
10/25/2026 05 PM PDT 0.75 7 0 Normal
10/25/2026 06 PM PDT 0.75 7 0 Normal
10/25/2026 07 PM PDT 0.75 7 0 Normal
10/25/2026 08 PM PDT 0.75 7 0 Normal
10/25/2026 09 PM PDT 0.75 7 0 Normal
10/25/2026 10 PM PDT 0.75 7 0 Normal
10/25/2026 11 PM PDT 0.75 7 0 Normal
10/26/2026 12 AM PDT 0.75 7 0 Normal
10/26/2026 01 AM PDT 0.75 7 0 Normal
10/26/2026 02 AM PDT 0.75 7 0 Normal
10/26/2026 03 AM PDT 0.74 7 - Normal
10/26/2026 04 AM PDT 0.75 7 + Normal
10/26/2026 05 AM PDT 0.75 7 0 Normal
10/26/2026 06 AM PDT 0.74 7 - Normal
10/26/2026 07 AM PDT 0.74 7 0 Normal
10/26/2026 08 AM PDT 0.75 7 + Normal
10/26/2026 09 AM PDT 0.74 7 - Normal
10/26/2026 10 AM PDT 0.74 7 0 Normal
10/26/2026 11 AM PDT 0.74 7 0 Normal
10/26/2026 12 PM PDT 0.74 7 0 Normal
10/26/2026 01 PM PDT 0.74 7 0 Normal
10/26/2026 02 PM PDT 0.74 7 0 Normal
10/26/2026 03 PM PDT 0.74 7 0 Normal
10/26/2026 04 PM PDT 0.74 7 0 Normal
10/26/2026 05 PM PDT 0.74 7 0 Normal
10/26/2026 06 PM PDT 0.74 7 0 Normal
10/26/2026 07 PM PDT 0.74 7 0 Normal
10/26/2026 08 PM PDT 0.74 7 0 Normal
10/26/2026 09 PM PDT 0.74 7 0 Normal
10/26/2026 10 PM PDT 0.74 7 0 Normal
10/26/2026 11 PM PDT 0.74 7 0 Normal
10/27/2026 12 AM PDT 0.74 7 0 Normal
10/27/2026 01 AM PDT 0.74 7 0 Normal
10/27/2026 02 AM PDT 0.74 7 0 Normal
10/27/2026 03 AM PDT 0.74 7 0 Normal
10/27/2026 04 AM PDT 0.74 7 0 Normal
10/27/2026 05 AM PDT 0.74 7 0 Normal
10/27/2026 06 AM PDT 0.74 7 0 Normal
10/27/2026 07 AM PDT 0.73 7 - Normal
10/27/2026 08 AM PDT 0.74 7 + Normal
10/27/2026 09 AM PDT 0.74 7 0 Normal
10/27/2026 10 AM PDT 0.74 7 0 Normal
10/27/2026 11 AM PDT 0.73 7 - Normal
10/27/2026 12 PM PDT 0.73 7 0 Normal
10/27/2026 01 PM PDT 0.73 7 0 Normal
10/27/2026 02 PM PDT 0.73 7 0 Normal
10/27/2026 03 PM PDT 0.73 7 0 Normal
10/27/2026 04 PM PDT 0.73 7 0 Normal
10/27/2026 05 PM PDT 0.73 7 0 Normal
10/27/2026 06 PM PDT 0.73 7 0 Normal
10/27/2026 07 PM PDT 0.73 7 0 Normal
10/27/2026 08 PM PDT 0.73 7 0 Normal
10/27/2026 09 PM PDT 0.73 7 0 Normal
10/27/2026 10 PM PDT 0.73 7 0 Normal
10/27/2026 11 PM PDT 0.73 7 0 Normal
10/28/2026 12 AM PDT 0.73 7 0 Normal
10/28/2026 01 AM PDT 0.73 7 0 Normal
10/28/2026 02 AM PDT 0.73 7 0 Normal
10/28/2026 03 AM PDT 0.73 7 0 Normal
10/28/2026 04 AM PDT 0.73 7 0 Normal
10/28/2026 05 AM PDT 0.74 7 + Normal
10/28/2026 06 AM PDT 0.73 7 - Normal
10/28/2026 07 AM PDT 0.73 7 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
10/28/2026 08 AM PDT 0.73 7 Normal
10/28/2026 09 AM PDT 0.73 7 0 Normal
10/28/2026 10 AM PDT 0.73 7 0 Normal
10/28/2026 11 AM PDT 0.73 7 0 Normal
10/28/2026 12 PM PDT 0.73 7 0 Normal
10/28/2026 01 PM PDT 0.73 7 0 Normal
10/28/2026 02 PM PDT 0.73 7 0 Normal
10/28/2026 03 PM PDT 0.73 7 0 Normal
10/28/2026 04 PM PDT 0.73 7 0 Normal
10/28/2026 05 PM PDT 0.73 7 0 Normal
10/28/2026 06 PM PDT 0.73 7 0 Normal
10/28/2026 07 PM PDT 0.73 7 0 Normal
10/28/2026 08 PM PDT 0.73 7 0 Normal
10/28/2026 09 PM PDT 0.73 7 0 Normal
10/28/2026 10 PM PDT 0.73 7 0 Normal
10/28/2026 11 PM PDT 0.73 7 0 Normal
10/29/2026 12 AM PDT 0.73 7 0 Normal
10/29/2026 01 AM PDT 0.73 7 0 Normal
10/29/2026 02 AM PDT 0.73 7 0 Normal
10/29/2026 03 AM PDT 0.73 7 0 Normal
10/29/2026 04 AM PDT 0.73 7 0 Normal
10/29/2026 05 AM PDT 0.73 7 0 Normal
10/29/2026 06 AM PDT 0.73 7 0 Normal
10/29/2026 07 AM PDT 0.73 7 0 Normal
10/29/2026 08 AM PDT 0.73 7 0 Normal
10/29/2026 09 AM PDT 0.73 7 0 Normal
10/29/2026 10 AM PDT 0.73 7 0 Normal
10/29/2026 11 AM PDT 0.74 7 + Normal
10/29/2026 12 PM PDT 0.74 7 0 Normal
10/29/2026 01 PM PDT 0.74 7 0 Normal
10/29/2026 02 PM PDT 0.74 7 0 Normal
10/29/2026 03 PM PDT 0.74 7 0 Normal
10/29/2026 04 PM PDT 0.74 7 0 Normal
10/29/2026 05 PM PDT 0.74 7 0 Normal
10/29/2026 06 PM PDT 0.74 7 0 Normal
10/29/2026 07 PM PDT 0.74 7 0 Normal
10/29/2026 08 PM PDT 0.74 7 0 Normal
10/29/2026 09 PM PDT 0.75 7 + Normal
10/29/2026 10 PM PDT 0.75 7 0 Normal
10/29/2026 11 PM PDT 0.75 7 0 Normal
10/30/2026 12 AM PDT 0.75 7 0 Normal
10/30/2026 01 AM PDT 0.75 7 0 Normal
10/30/2026 02 AM PDT 0.75 7 0 Normal
10/30/2026 03 AM PDT 0.75 7 0 Normal
10/30/2026 04 AM PDT 0.75 7 0 Normal
10/30/2026 05 AM PDT 0.75 7 0 Normal
10/30/2026 06 AM PDT 0.75 7 0 Normal
10/30/2026 07 AM PDT 0.75 7 0 Normal
10/30/2026 08 AM PDT 0.75 7 0 Normal
10/30/2026 09 AM PDT 0.75 7 0 Normal
10/30/2026 10 AM PDT 0.75 7 0 Normal
10/30/2026 11 AM PDT 0.75 7 0 Normal
10/30/2026 12 PM PDT 0.76 7 + Normal
10/30/2026 01 PM PDT 0.76 7 0 Normal
10/30/2026 02 PM PDT 0.76 7 0 Normal
10/30/2026 03 PM PDT 0.76 7 0 Normal
10/30/2026 04 PM PDT 0.76 7 0 Normal
10/30/2026 05 PM PDT 0.76 7 0 Normal
10/30/2026 06 PM PDT 0.76 7 0 Normal
10/30/2026 07 PM PDT 0.76 7 0 Normal
10/30/2026 08 PM PDT 0.76 7 0 Normal
10/30/2026 09 PM PDT 0.76 7 0 Normal
10/30/2026 10 PM PDT 0.77 8 + Normal
10/30/2026 11 PM PDT 0.77 8 0 Normal
10/31/2026 12 AM PDT 0.77 8 0 Normal
10/31/2026 01 AM PDT 0.77 8 0 Normal
10/31/2026 02 AM PDT 0.77 8 0 Normal
10/31/2026 03 AM PDT 0.77 8 0 Normal
10/31/2026 04 AM PDT 0.77 8 0 Normal
10/31/2026 05 AM PDT 0.77 8 0 Normal
10/31/2026 06 AM PDT 0.77 8 0 Normal
10/31/2026 07 AM PDT 0.78 8 + Normal
10/31/2026 08 AM PDT 0.79 8 + Normal
10/31/2026 09 AM PDT 0.80 8 + Normal
10/31/2026 10 AM PDT 0.82 9 + Normal
10/31/2026 11 AM PDT 0.83 9 + Normal
10/31/2026 12 PM PDT 0.85 10 + Normal
10/31/2026 01 PM PDT 0.86 10 + Normal
10/31/2026 02 PM PDT 0.87 11 + Normal
10/31/2026 03 PM PDT 0.88 11 + Normal
10/31/2026 04 PM PDT 0.89 11 + Normal
10/31/2026 05 PM PDT 0.89 11 0 Normal
10/31/2026 06 PM PDT 0.90 12 + Normal
10/31/2026 07 PM PDT 0.91 12 + Normal
10/31/2026 08 PM PDT 0.91 12 0 Normal
10/31/2026 09 PM PDT 0.91 12 0 Normal
10/31/2026 10 PM PDT 0.92 12 + Normal
10/31/2026 11 PM PDT 0.92 12 0 Normal
11/01/2026 12 AM PDT 0.93 13 + Normal
11/01/2026 01 AM PDT 0.93 13 0 Normal
11/01/2026 01 AM PST 0.93 13 0 Normal
11/01/2026 02 AM PST 0.94 13 + Normal
11/01/2026 03 AM PST 0.94 13 0 Normal
11/01/2026 04 AM PST 0.94 13 0 Normal
11/01/2026 05 AM PST 0.94 13 0 Normal
11/01/2026 06 AM PST 0.95 13 + Normal
11/01/2026 07 AM PST 0.95 13 0 Normal
11/01/2026 08 AM PST 0.95 13 0 Normal
11/01/2026 09 AM PST 0.95 13 0 Normal
11/01/2026 10 AM PST 0.95 13 0 Normal
11/01/2026 11 AM PST 0.95 13 0 Normal
11/01/2026 12 PM PST 0.96 14 + Normal
11/01/2026 01 PM PST 0.96 14 0 Normal
11/01/2026 02 PM PST 0.96 14 0 Normal
11/01/2026 03 PM PST 0.96 14 0 Normal
11/01/2026 04 PM PST 0.96 14 0 Normal
11/01/2026 05 PM PST 0.96 14 0 Normal
11/01/2026 06 PM PST 0.96 14 0 Normal
11/01/2026 07 PM PST 0.96 14 0 Normal
11/01/2026 08 PM PST 0.96 14 0 Normal
11/01/2026 09 PM PST 0.96 14 0 Normal
11/01/2026 10 PM PST 0.96 14 0 Normal
11/01/2026 11 PM PST 0.96 14 0 Normal
11/02/2026 12 AM PST 0.97 14 + Normal
11/02/2026 01 AM PST 0.97 14 0 Normal
11/02/2026 02 AM PST 0.97 14 0 Normal
11/02/2026 03 AM PST 0.97 14 0 Normal
11/02/2026 04 AM PST 0.97 14 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.
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