TRINITY RIVER - ABOVE NORTH FORK TRINITY RIVER NEAR HELENA (TRNC1)
Latitude: 40.77º NLongitude: 123.11º WElevation: 1380 FeetForecast Type: Unofficial Location
Location: Trinity County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: May 25 2026 at 7:17 AM PDTNext Issuance: May 26 2026 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Trinity River - Above NF Trinity R Nr Helena (TRNC1)
#
# File Generation Time:  05/25/2026 at 07:18 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/23/2026 at 01:00 AM PDT
# Maximum Observed Stage:                       10.96 Feet
# Maximum Observed Flow:                        1432 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/25/2026 at 11:00 AM PDT
# Maximum Forecast Stage:                       10.47 Feet
# Maximum Forecast Flow:                        1137 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/20/2026 07 AM PDT           10.57           1195                Not Applicable
  05/20/2026 08 AM PDT           10.55           1183         -      Not Applicable
  05/20/2026 09 AM PDT           10.57           1195         +      Not Applicable
  05/20/2026 10 AM PDT           10.55           1183         -      Not Applicable
  05/20/2026 11 AM PDT           10.52           1166         -      Not Applicable
  05/20/2026 12 PM PDT           10.50           1154         -      Not Applicable
  05/20/2026 01 PM PDT           10.50           1154         0      Not Applicable
  05/20/2026 02 PM PDT           10.50           1154         0      Not Applicable
  05/20/2026 03 PM PDT           10.49           1149         -      Not Applicable
  05/20/2026 04 PM PDT           10.48           1143         -      Not Applicable
  05/20/2026 05 PM PDT           10.48           1143         0      Not Applicable
  05/20/2026 06 PM PDT           10.47           1137         -      Not Applicable
  05/20/2026 07 PM PDT           10.45           1126         -      Not Applicable
  05/20/2026 08 PM PDT           10.46           1132         +      Not Applicable
  05/20/2026 09 PM PDT           10.46           1132         0      Not Applicable
  05/20/2026 10 PM PDT           10.45           1126         -      Not Applicable
  05/20/2026 11 PM PDT           10.45           1126         0      Not Applicable
  05/21/2026 12 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 01 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 02 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 03 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 04 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 05 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 06 AM PDT           10.45           1126         0      Not Applicable
  05/21/2026 07 AM PDT           10.47           1137         +      Not Applicable
  05/21/2026 08 AM PDT           10.50           1154         +      Not Applicable
  05/21/2026 09 AM PDT           10.51           1160         +      Not Applicable
  05/21/2026 10 AM PDT           10.50           1154         -      Not Applicable
  05/21/2026 11 AM PDT           10.50           1154         0      Not Applicable
  05/21/2026 12 PM PDT           10.52           1166         +      Not Applicable
  05/21/2026 01 PM PDT           10.53           1172         +      Not Applicable
  05/21/2026 02 PM PDT           10.53           1172         0      Not Applicable
  05/21/2026 03 PM PDT           10.52           1166         -      Not Applicable
  05/21/2026 04 PM PDT           10.53           1172         +      Not Applicable
  05/21/2026 05 PM PDT           10.52           1166         -      Not Applicable
  05/21/2026 06 PM PDT           10.52           1166         0      Not Applicable
  05/21/2026 07 PM PDT           10.51           1160         -      Not Applicable
  05/21/2026 08 PM PDT           10.51           1160         0      Not Applicable
  05/21/2026 09 PM PDT           10.51           1160         0      Not Applicable
  05/21/2026 10 PM PDT           10.50           1154         -      Not Applicable
  05/21/2026 11 PM PDT           10.50           1154         0      Not Applicable
  05/22/2026 12 AM PDT           10.49           1149         -      Not Applicable
  05/22/2026 01 AM PDT           10.49           1149         0      Not Applicable
  05/22/2026 02 AM PDT           10.49           1149         0      Not Applicable
  05/22/2026 03 AM PDT           10.49           1149         0      Not Applicable
  05/22/2026 04 AM PDT           10.47           1137         -      Not Applicable
  05/22/2026 05 AM PDT           10.49           1149         +      Not Applicable
  05/22/2026 06 AM PDT           10.49           1149         0      Not Applicable
  05/22/2026 07 AM PDT           10.50           1154         +      Not Applicable
  05/22/2026 08 AM PDT           10.51           1160         +      Not Applicable
  05/22/2026 09 AM PDT           10.53           1172         +      Not Applicable
  05/22/2026 10 AM PDT           10.52           1166         -      Not Applicable
  05/22/2026 11 AM PDT           10.52           1166         0      Not Applicable
  05/22/2026 12 PM PDT           10.52           1166         0      Not Applicable
  05/22/2026 01 PM PDT           10.52           1166         0      Not Applicable
  05/22/2026 02 PM PDT           10.52           1166         0      Not Applicable
  05/22/2026 03 PM PDT           10.51           1160         -      Not Applicable
  05/22/2026 04 PM PDT           10.52           1166         +      Not Applicable
  05/22/2026 05 PM PDT           10.52           1166         0      Not Applicable
  05/22/2026 06 PM PDT           10.51           1160         -      Not Applicable
  05/22/2026 07 PM PDT           10.52           1166         +      Not Applicable
  05/22/2026 08 PM PDT           10.51           1160         -      Not Applicable
  05/22/2026 09 PM PDT           10.49           1149         -      Not Applicable
  05/22/2026 10 PM PDT           10.51           1160         +      Not Applicable
  05/22/2026 11 PM PDT           10.50           1154         -      Not Applicable
  05/23/2026 12 AM PDT           10.73           1290         +      Not Applicable
  05/23/2026 01 AM PDT           10.96           1432         +      Not Applicable
  05/23/2026 02 AM PDT           10.89           1388         -      Not Applicable
  05/23/2026 03 AM PDT           10.82           1345         -      Not Applicable
  05/23/2026 04 AM PDT           10.78           1320         -      Not Applicable
  05/23/2026 05 AM PDT           10.74           1296         -      Not Applicable
  05/23/2026 06 AM PDT           10.71           1278         -      Not Applicable
  05/23/2026 07 AM PDT           10.72           1284         +      Not Applicable
  05/23/2026 08 AM PDT           10.68           1260         -      Not Applicable
  05/23/2026 09 AM PDT           10.69           1266         +      Not Applicable
  05/23/2026 10 AM PDT           10.68           1260         -      Not Applicable
  05/23/2026 11 AM PDT           10.66           1248         -      Not Applicable
  05/23/2026 12 PM PDT           10.65           1242         -      Not Applicable
  05/23/2026 01 PM PDT           10.63           1230         -      Not Applicable
  05/23/2026 02 PM PDT           10.64           1236         +      Not Applicable
  05/23/2026 03 PM PDT           10.61           1219         -      Not Applicable
  05/23/2026 04 PM PDT           10.60           1213         -      Not Applicable
  05/23/2026 05 PM PDT           10.60           1213         0      Not Applicable
  05/23/2026 06 PM PDT           10.59           1207         -      Not Applicable
  05/23/2026 07 PM PDT           10.57           1195         -      Not Applicable
  05/23/2026 08 PM PDT           10.57           1195         0      Not Applicable
  05/23/2026 09 PM PDT           10.55           1183         -      Not Applicable
  05/23/2026 10 PM PDT           10.55           1183         0      Not Applicable
  05/23/2026 11 PM PDT           10.53           1172         -      Not Applicable
  05/24/2026 12 AM PDT           10.53           1172         0      Not Applicable
  05/24/2026 01 AM PDT           10.53           1172         0      Not Applicable
  05/24/2026 02 AM PDT           10.55           1183         +      Not Applicable
  05/24/2026 03 AM PDT           10.51           1160         -      Not Applicable
  05/24/2026 04 AM PDT           10.51           1160         0      Not Applicable
  05/24/2026 05 AM PDT           10.51           1160         0      Not Applicable
  05/24/2026 06 AM PDT           10.51           1160         0      Not Applicable
  05/24/2026 07 AM PDT           10.50           1154         -      Not Applicable
  05/24/2026 08 AM PDT           10.52           1166         +      Not Applicable
  05/24/2026 09 AM PDT           10.52           1166         0      Not Applicable
  05/24/2026 10 AM PDT           10.53           1172         +      Not Applicable
  05/24/2026 11 AM PDT           10.53           1172         0      Not Applicable
  05/24/2026 12 PM PDT           10.52           1166         -      Not Applicable
  05/24/2026 01 PM PDT           10.52           1166         0      Not Applicable
  05/24/2026 02 PM PDT           10.53           1172         +      Not Applicable
  05/24/2026 03 PM PDT           10.53           1172         0      Not Applicable
  05/24/2026 04 PM PDT           10.50           1154         -      Not Applicable
  05/24/2026 05 PM PDT           10.49           1149         -      Not Applicable
  05/24/2026 06 PM PDT           10.47           1137         -      Not Applicable
  05/24/2026 07 PM PDT           10.45           1126         -      Not Applicable
  05/24/2026 08 PM PDT           10.43           1115         -      Not Applicable
  05/24/2026 09 PM PDT           10.41           1103         -      Not Applicable
  05/24/2026 10 PM PDT           10.42           1109         +      Not Applicable
  05/24/2026 11 PM PDT           10.43           1115         +      Not Applicable
  05/25/2026 12 AM PDT           10.43           1115         0      Not Applicable
  05/25/2026 01 AM PDT           10.43           1115         0      Not Applicable
  05/25/2026 02 AM PDT           10.45           1126         +      Not Applicable
  05/25/2026 03 AM PDT           10.44           1120         -      Not Applicable
  05/25/2026 04 AM PDT           10.45           1126         +      Not Applicable
  05/25/2026 05 AM PDT           10.45           1126         0      Not Applicable
  05/25/2026 06 AM PDT           10.45           1126         0      Not Applicable
  05/25/2026 07 AM PDT           10.46           1132         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/25/2026 08 AM PDT           10.46           1132                Not Applicable
  05/25/2026 09 AM PDT           10.46           1132         0      Not Applicable
  05/25/2026 10 AM PDT           10.46           1132         0      Not Applicable
  05/25/2026 11 AM PDT           10.47           1137         +      Not Applicable
  05/25/2026 12 PM PDT           10.47           1137         0      Not Applicable
  05/25/2026 01 PM PDT           10.46           1132         -      Not Applicable
  05/25/2026 02 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 03 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 04 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 05 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 06 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 07 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 08 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 09 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 10 PM PDT           10.46           1132         0      Not Applicable
  05/25/2026 11 PM PDT           10.46           1132         0      Not Applicable
  05/26/2026 12 AM PDT           10.46           1132         0      Not Applicable
  05/26/2026 01 AM PDT           10.45           1126         -      Not Applicable
  05/26/2026 02 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 03 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 04 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 05 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 06 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 07 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 08 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 09 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 10 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 11 AM PDT           10.45           1126         0      Not Applicable
  05/26/2026 12 PM PDT           10.45           1126         0      Not Applicable
  05/26/2026 01 PM PDT           10.45           1126         0      Not Applicable
  05/26/2026 02 PM PDT           10.44           1120         -      Not Applicable
  05/26/2026 03 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 04 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 05 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 06 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 07 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 08 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 09 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 10 PM PDT           10.44           1120         0      Not Applicable
  05/26/2026 11 PM PDT           10.44           1120         0      Not Applicable
  05/27/2026 12 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 01 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 02 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 03 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 04 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 05 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 06 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 07 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 08 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 09 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 10 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 11 AM PDT           10.44           1120         0      Not Applicable
  05/27/2026 12 PM PDT           10.43           1115         -      Not Applicable
  05/27/2026 01 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 02 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 03 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 04 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 05 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 06 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 07 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 08 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 09 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 10 PM PDT           10.43           1115         0      Not Applicable
  05/27/2026 11 PM PDT           10.43           1115         0      Not Applicable
  05/28/2026 12 AM PDT           10.43           1115         0      Not Applicable
  05/28/2026 01 AM PDT           10.43           1115         0      Not Applicable
  05/28/2026 02 AM PDT           10.43           1115         0      Not Applicable
  05/28/2026 03 AM PDT           10.43           1115         0      Not Applicable
  05/28/2026 04 AM PDT           10.42           1109         -      Not Applicable
  05/28/2026 05 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 06 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 07 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 08 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 09 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 10 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 11 AM PDT           10.42           1109         0      Not Applicable
  05/28/2026 12 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 01 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 02 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 03 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 04 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 05 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 06 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 07 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 08 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 09 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 10 PM PDT           10.42           1109         0      Not Applicable
  05/28/2026 11 PM PDT           10.42           1109         0      Not Applicable
  05/29/2026 12 AM PDT           10.42           1109         0      Not Applicable
  05/29/2026 01 AM PDT           10.42           1109         0      Not Applicable
  05/29/2026 02 AM PDT           10.43           1115         +      Not Applicable
  05/29/2026 03 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 04 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 05 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 06 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 07 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 08 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 09 AM PDT           10.43           1115         0      Not Applicable
  05/29/2026 10 AM PDT           10.42           1109         -      Not Applicable
  05/29/2026 11 AM PDT           10.42           1109         0      Not Applicable
  05/29/2026 12 PM PDT           10.42           1109         0      Not Applicable
  05/29/2026 01 PM PDT           10.42           1109         0      Not Applicable
  05/29/2026 02 PM PDT           10.41           1103         -      Not Applicable
  05/29/2026 03 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 04 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 05 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 06 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 07 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 08 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 09 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 10 PM PDT           10.41           1103         0      Not Applicable
  05/29/2026 11 PM PDT           10.40           1098         -      Not Applicable
  05/30/2026 12 AM PDT           10.40           1098         0      Not Applicable
  05/30/2026 01 AM PDT           10.40           1098         0      Not Applicable
  05/30/2026 02 AM PDT           10.40           1098         0      Not Applicable
  05/30/2026 03 AM PDT           10.40           1098         0      Not Applicable
  05/30/2026 04 AM PDT           10.40           1098         0      Not Applicable
  05/30/2026 05 AM PDT           10.40           1098         0      Not Applicable
#
# 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.