SOUTH FORK TRINITY RIVER - HYAMPOM (HYMC1)
Latitude: 40.65º NLongitude: 123.49º WElevation: 1211 FeetForecast Type: Unofficial Location
Location: Trinity County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Apr 04 2026 at 7:44 AM PDTNext Issuance: Apr 05 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: South Fork Trinity River - Hyampom (HYMC1)
#
# File Generation Time:  04/04/2026 at 07:47 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/02/2026 at 10:00 AM PDT
# Maximum Observed Stage:                       4.68 Feet
# Maximum Observed Flow:                        856 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/04/2026 at 02:00 PM PDT
# Maximum Forecast Stage:                       4.26 Feet
# Maximum Forecast Flow:                        656 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/30/2026 07 AM PDT            4.10            587                Not Applicable
  03/30/2026 08 AM PDT            4.10            587         0      Not Applicable
  03/30/2026 09 AM PDT            4.10            587         0      Not Applicable
  03/30/2026 10 AM PDT            4.10            587         0      Not Applicable
  03/30/2026 11 AM PDT            4.10            587         0      Not Applicable
  03/30/2026 12 PM PDT            4.10            587         0      Not Applicable
  03/30/2026 01 PM PDT            4.10            587         0      Not Applicable
  03/30/2026 02 PM PDT            4.10            587         0      Not Applicable
  03/30/2026 03 PM PDT            4.09            583         -      Not Applicable
  03/30/2026 04 PM PDT            4.10            587         +      Not Applicable
  03/30/2026 05 PM PDT            4.09            583         -      Not Applicable
  03/30/2026 06 PM PDT            4.09            583         0      Not Applicable
  03/30/2026 07 PM PDT            4.08            579         -      Not Applicable
  03/30/2026 08 PM PDT            4.09            583         +      Not Applicable
  03/30/2026 09 PM PDT            4.09            583         0      Not Applicable
  03/30/2026 10 PM PDT            4.09            583         0      Not Applicable
  03/30/2026 11 PM PDT            4.08            579         -      Not Applicable
  03/31/2026 12 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 01 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 02 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 03 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 04 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 05 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 06 AM PDT            4.09            583         +      Not Applicable
  03/31/2026 07 AM PDT            4.09            583         0      Not Applicable
  03/31/2026 08 AM PDT            4.08            579         -      Not Applicable
  03/31/2026 09 AM PDT            4.08            579         0      Not Applicable
  03/31/2026 10 AM PDT            4.09            583         +      Not Applicable
  03/31/2026 11 AM PDT            4.08            579         -      Not Applicable
  03/31/2026 12 PM PDT            4.08            579         0      Not Applicable
  03/31/2026 01 PM PDT            4.08            579         0      Not Applicable
  03/31/2026 02 PM PDT            4.09            583         +      Not Applicable
  03/31/2026 03 PM PDT            4.08            579         -      Not Applicable
  03/31/2026 04 PM PDT            4.08            579         0      Not Applicable
  03/31/2026 05 PM PDT            4.10            587         +      Not Applicable
  03/31/2026 06 PM PDT            4.09            583         -      Not Applicable
  03/31/2026 07 PM PDT            4.10            587         +      Not Applicable
  03/31/2026 08 PM PDT            4.09            583         -      Not Applicable
  03/31/2026 09 PM PDT            4.10            587         +      Not Applicable
  03/31/2026 10 PM PDT            4.10            587         0      Not Applicable
  03/31/2026 11 PM PDT            4.10            587         0      Not Applicable
  04/01/2026 12 AM PDT            4.09            583         -      Not Applicable
  04/01/2026 01 AM PDT            4.10            587         +      Not Applicable
  04/01/2026 02 AM PDT            4.11            592         +      Not Applicable
  04/01/2026 03 AM PDT            4.10            587         -      Not Applicable
  04/01/2026 04 AM PDT            4.10            587         0      Not Applicable
  04/01/2026 05 AM PDT            4.11            592         +      Not Applicable
  04/01/2026 06 AM PDT            4.12            596         +      Not Applicable
  04/01/2026 07 AM PDT            4.11            592         -      Not Applicable
  04/01/2026 08 AM PDT            4.12            596         +      Not Applicable
  04/01/2026 09 AM PDT            4.15            608         +      Not Applicable
  04/01/2026 10 AM PDT            4.15            608         0      Not Applicable
  04/01/2026 11 AM PDT            4.16            613         +      Not Applicable
  04/01/2026 12 PM PDT            4.17            617         +      Not Applicable
  04/01/2026 01 PM PDT            4.20            630         +      Not Applicable
  04/01/2026 02 PM PDT            4.22            638         +      Not Applicable
  04/01/2026 03 PM PDT            4.25            651         +      Not Applicable
  04/01/2026 04 PM PDT            4.29            669         +      Not Applicable
  04/01/2026 05 PM PDT            4.34            692         +      Not Applicable
  04/01/2026 06 PM PDT            4.42            729         +      Not Applicable
  04/01/2026 07 PM PDT            4.46            747         +      Not Applicable
  04/01/2026 08 PM PDT            4.49            762         +      Not Applicable
  04/01/2026 09 PM PDT            4.51            771         +      Not Applicable
  04/01/2026 10 PM PDT            4.53            781         +      Not Applicable
  04/01/2026 11 PM PDT            4.53            781         0      Not Applicable
  04/02/2026 12 AM PDT            4.54            786         +      Not Applicable
  04/02/2026 01 AM PDT            4.55            791         +      Not Applicable
  04/02/2026 02 AM PDT            4.56            796         +      Not Applicable
  04/02/2026 03 AM PDT            4.58            806         +      Not Applicable
  04/02/2026 04 AM PDT            4.60            816         +      Not Applicable
  04/02/2026 05 AM PDT            4.63            831         +      Not Applicable
  04/02/2026 06 AM PDT            4.65            841         +      Not Applicable
  04/02/2026 07 AM PDT            4.67            851         +      Not Applicable
  04/02/2026 08 AM PDT            4.66            846         -      Not Applicable
  04/02/2026 09 AM PDT            4.68            856         +      Not Applicable
  04/02/2026 10 AM PDT            4.68            856         0      Not Applicable
  04/02/2026 11 AM PDT            4.67            851         -      Not Applicable
  04/02/2026 12 PM PDT            4.64            836         -      Not Applicable
  04/02/2026 01 PM PDT            4.64            836         0      Not Applicable
  04/02/2026 02 PM PDT            4.63            831         -      Not Applicable
  04/02/2026 03 PM PDT            4.60            816         -      Not Applicable
  04/02/2026 04 PM PDT            4.59            811         -      Not Applicable
  04/02/2026 05 PM PDT            4.57            801         -      Not Applicable
  04/02/2026 06 PM PDT            4.56            796         -      Not Applicable
  04/02/2026 07 PM PDT            4.53            781         -      Not Applicable
  04/02/2026 08 PM PDT            4.53            781         0      Not Applicable
  04/02/2026 09 PM PDT            4.51            771         -      Not Applicable
  04/02/2026 10 PM PDT            4.48            757         -      Not Applicable
  04/02/2026 11 PM PDT            4.47            752         -      Not Applicable
  04/03/2026 12 AM PDT            4.45            743         -      Not Applicable
  04/03/2026 01 AM PDT            4.43            733         -      Not Applicable
  04/03/2026 02 AM PDT            4.40            719         -      Not Applicable
  04/03/2026 03 AM PDT            4.39            715         -      Not Applicable
  04/03/2026 04 AM PDT            4.37            705         -      Not Applicable
  04/03/2026 05 AM PDT            4.37            705         0      Not Applicable
  04/03/2026 06 AM PDT            4.35            696         -      Not Applicable
  04/03/2026 07 AM PDT            4.33            687         -      Not Applicable
  04/03/2026 08 AM PDT            4.32            683         -      Not Applicable
  04/03/2026 09 AM PDT            4.31            678         -      Not Applicable
  04/03/2026 10 AM PDT            4.29            669         -      Not Applicable
  04/03/2026 11 AM PDT            4.29            669         0      Not Applicable
  04/03/2026 12 PM PDT            4.29            669         0      Not Applicable
  04/03/2026 01 PM PDT            4.29            669         0      Not Applicable
  04/03/2026 02 PM PDT            4.27            660         -      Not Applicable
  04/03/2026 03 PM PDT            4.26            656         -      Not Applicable
  04/03/2026 04 PM PDT            4.26            656         0      Not Applicable
  04/03/2026 05 PM PDT            4.24            647         -      Not Applicable
  04/03/2026 06 PM PDT            4.25            651         +      Not Applicable
  04/03/2026 07 PM PDT            4.23            643         -      Not Applicable
  04/03/2026 08 PM PDT            4.23            643         0      Not Applicable
  04/03/2026 09 PM PDT            4.22            638         -      Not Applicable
  04/03/2026 10 PM PDT            4.21            634         -      Not Applicable
  04/03/2026 11 PM PDT            4.20            630         -      Not Applicable
  04/04/2026 12 AM PDT            4.20            630         0      Not Applicable
  04/04/2026 01 AM PDT            4.19            625         -      Not Applicable
  04/04/2026 02 AM PDT            4.19            625         0      Not Applicable
  04/04/2026 03 AM PDT            4.19            625         0      Not Applicable
  04/04/2026 04 AM PDT            4.18            621         -      Not Applicable
  04/04/2026 05 AM PDT            4.17            617         -      Not Applicable
  04/04/2026 06 AM PDT            4.18            621         +      Not Applicable
  04/04/2026 07 AM PDT            4.20            630         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/04/2026 08 AM PDT            4.21            634                Not Applicable
  04/04/2026 09 AM PDT            4.22            638         +      Not Applicable
  04/04/2026 10 AM PDT            4.23            643         +      Not Applicable
  04/04/2026 11 AM PDT            4.24            647         +      Not Applicable
  04/04/2026 12 PM PDT            4.25            651         +      Not Applicable
  04/04/2026 01 PM PDT            4.25            651         0      Not Applicable
  04/04/2026 02 PM PDT            4.26            656         +      Not Applicable
  04/04/2026 03 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 04 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 05 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 06 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 07 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 08 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 09 PM PDT            4.26            656         0      Not Applicable
  04/04/2026 10 PM PDT            4.25            651         -      Not Applicable
  04/04/2026 11 PM PDT            4.25            651         0      Not Applicable
  04/05/2026 12 AM PDT            4.25            651         0      Not Applicable
  04/05/2026 01 AM PDT            4.25            651         0      Not Applicable
  04/05/2026 02 AM PDT            4.24            647         -      Not Applicable
  04/05/2026 03 AM PDT            4.24            647         0      Not Applicable
  04/05/2026 04 AM PDT            4.24            647         0      Not Applicable
  04/05/2026 05 AM PDT            4.23            643         -      Not Applicable
  04/05/2026 06 AM PDT            4.23            643         0      Not Applicable
  04/05/2026 07 AM PDT            4.22            638         -      Not Applicable
  04/05/2026 08 AM PDT            4.22            638         0      Not Applicable
  04/05/2026 09 AM PDT            4.22            638         0      Not Applicable
  04/05/2026 10 AM PDT            4.21            634         -      Not Applicable
  04/05/2026 11 AM PDT            4.21            634         0      Not Applicable
  04/05/2026 12 PM PDT            4.21            634         0      Not Applicable
  04/05/2026 01 PM PDT            4.20            630         -      Not Applicable
  04/05/2026 02 PM PDT            4.20            630         0      Not Applicable
  04/05/2026 03 PM PDT            4.20            630         0      Not Applicable
  04/05/2026 04 PM PDT            4.19            625         -      Not Applicable
  04/05/2026 05 PM PDT            4.19            625         0      Not Applicable
  04/05/2026 06 PM PDT            4.19            625         0      Not Applicable
  04/05/2026 07 PM PDT            4.18            621         -      Not Applicable
  04/05/2026 08 PM PDT            4.18            621         0      Not Applicable
  04/05/2026 09 PM PDT            4.17            617         -      Not Applicable
  04/05/2026 10 PM PDT            4.17            617         0      Not Applicable
  04/05/2026 11 PM PDT            4.17            617         0      Not Applicable
  04/06/2026 12 AM PDT            4.17            617         0      Not Applicable
  04/06/2026 01 AM PDT            4.16            613         -      Not Applicable
  04/06/2026 02 AM PDT            4.16            613         0      Not Applicable
  04/06/2026 03 AM PDT            4.16            613         0      Not Applicable
  04/06/2026 04 AM PDT            4.15            608         -      Not Applicable
  04/06/2026 05 AM PDT            4.15            608         0      Not Applicable
  04/06/2026 06 AM PDT            4.15            608         0      Not Applicable
  04/06/2026 07 AM PDT            4.14            604         -      Not Applicable
  04/06/2026 08 AM PDT            4.14            604         0      Not Applicable
  04/06/2026 09 AM PDT            4.14            604         0      Not Applicable
  04/06/2026 10 AM PDT            4.13            600         -      Not Applicable
  04/06/2026 11 AM PDT            4.13            600         0      Not Applicable
  04/06/2026 12 PM PDT            4.13            600         0      Not Applicable
  04/06/2026 01 PM PDT            4.12            596         -      Not Applicable
  04/06/2026 02 PM PDT            4.12            596         0      Not Applicable
  04/06/2026 03 PM PDT            4.12            596         0      Not Applicable
  04/06/2026 04 PM PDT            4.12            596         0      Not Applicable
  04/06/2026 05 PM PDT            4.11            592         -      Not Applicable
  04/06/2026 06 PM PDT            4.11            592         0      Not Applicable
  04/06/2026 07 PM PDT            4.11            592         0      Not Applicable
  04/06/2026 08 PM PDT            4.11            592         0      Not Applicable
  04/06/2026 09 PM PDT            4.10            587         -      Not Applicable
  04/06/2026 10 PM PDT            4.10            587         0      Not Applicable
  04/06/2026 11 PM PDT            4.10            587         0      Not Applicable
  04/07/2026 12 AM PDT            4.10            587         0      Not Applicable
  04/07/2026 01 AM PDT            4.09            583         -      Not Applicable
  04/07/2026 02 AM PDT            4.09            583         0      Not Applicable
  04/07/2026 03 AM PDT            4.09            583         0      Not Applicable
  04/07/2026 04 AM PDT            4.09            583         0      Not Applicable
  04/07/2026 05 AM PDT            4.09            583         0      Not Applicable
  04/07/2026 06 AM PDT            4.08            579         -      Not Applicable
  04/07/2026 07 AM PDT            4.08            579         0      Not Applicable
  04/07/2026 08 AM PDT            4.08            579         0      Not Applicable
  04/07/2026 09 AM PDT            4.08            579         0      Not Applicable
  04/07/2026 10 AM PDT            4.08            579         0      Not Applicable
  04/07/2026 11 AM PDT            4.08            579         0      Not Applicable
  04/07/2026 12 PM PDT            4.08            579         0      Not Applicable
  04/07/2026 01 PM PDT            4.08            579         0      Not Applicable
  04/07/2026 02 PM PDT            4.07            575         -      Not Applicable
  04/07/2026 03 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 04 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 05 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 06 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 07 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 08 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 09 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 10 PM PDT            4.07            575         0      Not Applicable
  04/07/2026 11 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 12 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 01 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 02 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 03 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 04 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 05 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 06 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 07 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 08 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 09 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 10 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 11 AM PDT            4.07            575         0      Not Applicable
  04/08/2026 12 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 01 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 02 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 03 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 04 PM PDT            4.07            575         0      Not Applicable
  04/08/2026 05 PM PDT            4.08            579         +      Not Applicable
  04/08/2026 06 PM PDT            4.08            579         0      Not Applicable
  04/08/2026 07 PM PDT            4.08            579         0      Not Applicable
  04/08/2026 08 PM PDT            4.09            583         +      Not Applicable
  04/08/2026 09 PM PDT            4.09            583         0      Not Applicable
  04/08/2026 10 PM PDT            4.10            587         +      Not Applicable
  04/08/2026 11 PM PDT            4.11            592         +      Not Applicable
  04/09/2026 12 AM PDT            4.12            596         +      Not Applicable
  04/09/2026 01 AM PDT            4.13            600         +      Not Applicable
  04/09/2026 02 AM PDT            4.14            604         +      Not Applicable
  04/09/2026 03 AM PDT            4.14            604         0      Not Applicable
  04/09/2026 04 AM PDT            4.15            608         +      Not Applicable
  04/09/2026 05 AM PDT            4.16            613         +      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.