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 29 2026 at 7:25 AM PDTNext Issuance: Apr 30 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:  04/29/2026 at 07:27 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/24/2026 at 08:00 AM PDT
# Maximum Observed Stage:                       5.07 Feet
# Maximum Observed Flow:                        1071 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/29/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       4.47 Feet
# Maximum Forecast Flow:                        752 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/24/2026 07 AM PDT            5.07           1071                Not Applicable
  04/24/2026 08 AM PDT            5.07           1071         0      Not Applicable
  04/24/2026 09 AM PDT            5.06           1065         -      Not Applicable
  04/24/2026 10 AM PDT            5.05           1059         -      Not Applicable
  04/24/2026 11 AM PDT            5.04           1053         -      Not Applicable
  04/24/2026 12 PM PDT            5.03           1047         -      Not Applicable
  04/24/2026 01 PM PDT            5.02           1042         -      Not Applicable
  04/24/2026 02 PM PDT            5.03           1047         +      Not Applicable
  04/24/2026 03 PM PDT            5.01           1036         -      Not Applicable
  04/24/2026 04 PM PDT            5.00           1030         -      Not Applicable
  04/24/2026 05 PM PDT            4.99           1024         -      Not Applicable
  04/24/2026 06 PM PDT            4.99           1024         0      Not Applicable
  04/24/2026 07 PM PDT            4.99           1024         0      Not Applicable
  04/24/2026 08 PM PDT            4.97           1013         -      Not Applicable
  04/24/2026 09 PM PDT            4.98           1019         +      Not Applicable
  04/24/2026 10 PM PDT            4.97           1013         -      Not Applicable
  04/24/2026 11 PM PDT            4.95           1002         -      Not Applicable
  04/25/2026 12 AM PDT            4.94            996         -      Not Applicable
  04/25/2026 01 AM PDT            4.93            991         -      Not Applicable
  04/25/2026 02 AM PDT            4.93            991         0      Not Applicable
  04/25/2026 03 AM PDT            4.92            985         -      Not Applicable
  04/25/2026 04 AM PDT            4.93            991         +      Not Applicable
  04/25/2026 05 AM PDT            4.90            974         -      Not Applicable
  04/25/2026 06 AM PDT            4.90            974         0      Not Applicable
  04/25/2026 07 AM PDT            4.89            968         -      Not Applicable
  04/25/2026 08 AM PDT            4.88            963         -      Not Applicable
  04/25/2026 09 AM PDT            4.89            968         +      Not Applicable
  04/25/2026 10 AM PDT            4.87            957         -      Not Applicable
  04/25/2026 11 AM PDT            4.88            963         +      Not Applicable
  04/25/2026 12 PM PDT            4.87            957         -      Not Applicable
  04/25/2026 01 PM PDT            4.85            946         -      Not Applicable
  04/25/2026 02 PM PDT            4.86            952         +      Not Applicable
  04/25/2026 03 PM PDT            4.85            946         -      Not Applicable
  04/25/2026 04 PM PDT            4.85            946         0      Not Applicable
  04/25/2026 05 PM PDT            4.85            946         0      Not Applicable
  04/25/2026 06 PM PDT            4.82            930         -      Not Applicable
  04/25/2026 07 PM PDT            4.82            930         0      Not Applicable
  04/25/2026 08 PM PDT            4.82            930         0      Not Applicable
  04/25/2026 09 PM PDT            4.79            914         -      Not Applicable
  04/25/2026 10 PM PDT            4.81            925         +      Not Applicable
  04/25/2026 11 PM PDT            4.80            919         -      Not Applicable
  04/26/2026 12 AM PDT            4.79            914         -      Not Applicable
  04/26/2026 01 AM PDT            4.78            909         -      Not Applicable
  04/26/2026 02 AM PDT            4.78            909         0      Not Applicable
  04/26/2026 03 AM PDT            4.77            903         -      Not Applicable
  04/26/2026 04 AM PDT            4.75            893         -      Not Applicable
  04/26/2026 05 AM PDT            4.76            898         +      Not Applicable
  04/26/2026 06 AM PDT            4.77            903         +      Not Applicable
  04/26/2026 07 AM PDT            4.74            888         -      Not Applicable
  04/26/2026 08 AM PDT            4.74            888         0      Not Applicable
  04/26/2026 09 AM PDT            4.73            882         -      Not Applicable
  04/26/2026 10 AM PDT            4.73            882         0      Not Applicable
  04/26/2026 11 AM PDT            4.73            882         0      Not Applicable
  04/26/2026 12 PM PDT            4.72            877         -      Not Applicable
  04/26/2026 01 PM PDT            4.72            877         0      Not Applicable
  04/26/2026 02 PM PDT            4.70            867         -      Not Applicable
  04/26/2026 03 PM PDT            4.71            872         +      Not Applicable
  04/26/2026 04 PM PDT            4.71            872         0      Not Applicable
  04/26/2026 05 PM PDT            4.70            867         -      Not Applicable
  04/26/2026 06 PM PDT            4.69            861         -      Not Applicable
  04/26/2026 07 PM PDT            4.68            856         -      Not Applicable
  04/26/2026 08 PM PDT            4.67            851         -      Not Applicable
  04/26/2026 09 PM PDT            4.68            856         +      Not Applicable
  04/26/2026 10 PM PDT            4.67            851         -      Not Applicable
  04/26/2026 11 PM PDT            4.66            846         -      Not Applicable
  04/27/2026 12 AM PDT            4.66            846         0      Not Applicable
  04/27/2026 01 AM PDT            4.66            846         0      Not Applicable
  04/27/2026 02 AM PDT            4.65            841         -      Not Applicable
  04/27/2026 03 AM PDT            4.65            841         0      Not Applicable
  04/27/2026 04 AM PDT            4.65            841         0      Not Applicable
  04/27/2026 05 AM PDT            4.64            836         -      Not Applicable
  04/27/2026 06 AM PDT            4.65            841         +      Not Applicable
  04/27/2026 07 AM PDT            4.64            836         -      Not Applicable
  04/27/2026 08 AM PDT            4.64            836         0      Not Applicable
  04/27/2026 09 AM PDT            4.65            841         +      Not Applicable
  04/27/2026 10 AM PDT            4.64            836         -      Not Applicable
  04/27/2026 11 AM PDT            4.65            841         +      Not Applicable
  04/27/2026 12 PM PDT            4.65            841         0      Not Applicable
  04/27/2026 01 PM PDT            4.65            841         0      Not Applicable
  04/27/2026 02 PM PDT            4.66            846         +      Not Applicable
  04/27/2026 03 PM PDT            4.67            851         +      Not Applicable
  04/27/2026 04 PM PDT            4.67            851         0      Not Applicable
  04/27/2026 05 PM PDT            4.68            856         +      Not Applicable
  04/27/2026 06 PM PDT            4.67            851         -      Not Applicable
  04/27/2026 07 PM PDT            4.66            846         -      Not Applicable
  04/27/2026 08 PM PDT            4.66            846         0      Not Applicable
  04/27/2026 09 PM PDT            4.64            836         -      Not Applicable
  04/27/2026 10 PM PDT            4.63            831         -      Not Applicable
  04/27/2026 11 PM PDT            4.63            831         0      Not Applicable
  04/28/2026 12 AM PDT            4.61            821         -      Not Applicable
  04/28/2026 01 AM PDT            4.61            821         0      Not Applicable
  04/28/2026 02 AM PDT            4.60            816         -      Not Applicable
  04/28/2026 03 AM PDT            4.59            811         -      Not Applicable
  04/28/2026 04 AM PDT            4.58            806         -      Not Applicable
  04/28/2026 05 AM PDT            4.57            801         -      Not Applicable
  04/28/2026 06 AM PDT            4.57            801         0      Not Applicable
  04/28/2026 07 AM PDT            4.56            796         -      Not Applicable
  04/28/2026 08 AM PDT            4.56            796         0      Not Applicable
  04/28/2026 09 AM PDT            4.55            791         -      Not Applicable
  04/28/2026 10 AM PDT            4.56            796         +      Not Applicable
  04/28/2026 11 AM PDT            4.55            791         -      Not Applicable
  04/28/2026 12 PM PDT            4.56            796         +      Not Applicable
  04/28/2026 01 PM PDT            4.54            786         -      Not Applicable
  04/28/2026 02 PM PDT            4.55            791         +      Not Applicable
  04/28/2026 03 PM PDT            4.55            791         0      Not Applicable
  04/28/2026 04 PM PDT            4.55            791         0      Not Applicable
  04/28/2026 05 PM PDT            4.54            786         -      Not Applicable
  04/28/2026 06 PM PDT            4.53            781         -      Not Applicable
  04/28/2026 07 PM PDT            4.54            786         +      Not Applicable
  04/28/2026 08 PM PDT            4.53            781         -      Not Applicable
  04/28/2026 09 PM PDT            4.52            776         -      Not Applicable
  04/28/2026 10 PM PDT            4.52            776         0      Not Applicable
  04/28/2026 11 PM PDT            4.51            771         -      Not Applicable
  04/29/2026 12 AM PDT            4.51            771         0      Not Applicable
  04/29/2026 01 AM PDT            4.50            767         -      Not Applicable
  04/29/2026 02 AM PDT            4.49            762         -      Not Applicable
  04/29/2026 03 AM PDT            4.49            762         0      Not Applicable
  04/29/2026 04 AM PDT            4.48            757         -      Not Applicable
  04/29/2026 05 AM PDT            4.49            762         +      Not Applicable
  04/29/2026 06 AM PDT            4.48            757         -      Not Applicable
  04/29/2026 07 AM PDT            4.47            752         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/29/2026 08 AM PDT            4.47            752                Not Applicable
  04/29/2026 09 AM PDT            4.46            747         -      Not Applicable
  04/29/2026 10 AM PDT            4.45            743         -      Not Applicable
  04/29/2026 11 AM PDT            4.45            743         0      Not Applicable
  04/29/2026 12 PM PDT            4.44            738         -      Not Applicable
  04/29/2026 01 PM PDT            4.43            733         -      Not Applicable
  04/29/2026 02 PM PDT            4.42            729         -      Not Applicable
  04/29/2026 03 PM PDT            4.42            729         0      Not Applicable
  04/29/2026 04 PM PDT            4.41            724         -      Not Applicable
  04/29/2026 05 PM PDT            4.40            719         -      Not Applicable
  04/29/2026 06 PM PDT            4.39            715         -      Not Applicable
  04/29/2026 07 PM PDT            4.39            715         0      Not Applicable
  04/29/2026 08 PM PDT            4.38            710         -      Not Applicable
  04/29/2026 09 PM PDT            4.37            705         -      Not Applicable
  04/29/2026 10 PM PDT            4.37            705         0      Not Applicable
  04/29/2026 11 PM PDT            4.36            701         -      Not Applicable
  04/30/2026 12 AM PDT            4.35            696         -      Not Applicable
  04/30/2026 01 AM PDT            4.34            692         -      Not Applicable
  04/30/2026 02 AM PDT            4.34            692         0      Not Applicable
  04/30/2026 03 AM PDT            4.33            687         -      Not Applicable
  04/30/2026 04 AM PDT            4.33            687         0      Not Applicable
  04/30/2026 05 AM PDT            4.32            683         -      Not Applicable
  04/30/2026 06 AM PDT            4.31            678         -      Not Applicable
  04/30/2026 07 AM PDT            4.30            674         -      Not Applicable
  04/30/2026 08 AM PDT            4.30            674         0      Not Applicable
  04/30/2026 09 AM PDT            4.29            669         -      Not Applicable
  04/30/2026 10 AM PDT            4.29            669         0      Not Applicable
  04/30/2026 11 AM PDT            4.28            665         -      Not Applicable
  04/30/2026 12 PM PDT            4.27            660         -      Not Applicable
  04/30/2026 01 PM PDT            4.27            660         0      Not Applicable
  04/30/2026 02 PM PDT            4.26            656         -      Not Applicable
  04/30/2026 03 PM PDT            4.25            651         -      Not Applicable
  04/30/2026 04 PM PDT            4.25            651         0      Not Applicable
  04/30/2026 05 PM PDT            4.24            647         -      Not Applicable
  04/30/2026 06 PM PDT            4.24            647         0      Not Applicable
  04/30/2026 07 PM PDT            4.23            643         -      Not Applicable
  04/30/2026 08 PM PDT            4.22            638         -      Not Applicable
  04/30/2026 09 PM PDT            4.22            638         0      Not Applicable
  04/30/2026 10 PM PDT            4.21            634         -      Not Applicable
  04/30/2026 11 PM PDT            4.21            634         0      Not Applicable
  05/01/2026 12 AM PDT            4.20            630         -      Not Applicable
  05/01/2026 01 AM PDT            4.20            630         0      Not Applicable
  05/01/2026 02 AM PDT            4.19            625         -      Not Applicable
  05/01/2026 03 AM PDT            4.18            621         -      Not Applicable
  05/01/2026 04 AM PDT            4.18            621         0      Not Applicable
  05/01/2026 05 AM PDT            4.17            617         -      Not Applicable
  05/01/2026 06 AM PDT            4.17            617         0      Not Applicable
  05/01/2026 07 AM PDT            4.16            613         -      Not Applicable
  05/01/2026 08 AM PDT            4.16            613         0      Not Applicable
  05/01/2026 09 AM PDT            4.15            608         -      Not Applicable
  05/01/2026 10 AM PDT            4.15            608         0      Not Applicable
  05/01/2026 11 AM PDT            4.14            604         -      Not Applicable
  05/01/2026 12 PM PDT            4.14            604         0      Not Applicable
  05/01/2026 01 PM PDT            4.13            600         -      Not Applicable
  05/01/2026 02 PM PDT            4.13            600         0      Not Applicable
  05/01/2026 03 PM PDT            4.12            596         -      Not Applicable
  05/01/2026 04 PM PDT            4.12            596         0      Not Applicable
  05/01/2026 05 PM PDT            4.11            592         -      Not Applicable
  05/01/2026 06 PM PDT            4.11            592         0      Not Applicable
  05/01/2026 07 PM PDT            4.10            587         -      Not Applicable
  05/01/2026 08 PM PDT            4.10            587         0      Not Applicable
  05/01/2026 09 PM PDT            4.09            583         -      Not Applicable
  05/01/2026 10 PM PDT            4.09            583         0      Not Applicable
  05/01/2026 11 PM PDT            4.08            579         -      Not Applicable
  05/02/2026 12 AM PDT            4.08            579         0      Not Applicable
  05/02/2026 01 AM PDT            4.08            579         0      Not Applicable
  05/02/2026 02 AM PDT            4.07            575         -      Not Applicable
  05/02/2026 03 AM PDT            4.07            575         0      Not Applicable
  05/02/2026 04 AM PDT            4.06            571         -      Not Applicable
  05/02/2026 05 AM PDT            4.06            571         0      Not Applicable
  05/02/2026 06 AM PDT            4.05            567         -      Not Applicable
  05/02/2026 07 AM PDT            4.05            567         0      Not Applicable
  05/02/2026 08 AM PDT            4.04            563         -      Not Applicable
  05/02/2026 09 AM PDT            4.04            563         0      Not Applicable
  05/02/2026 10 AM PDT            4.04            563         0      Not Applicable
  05/02/2026 11 AM PDT            4.03            559         -      Not Applicable
  05/02/2026 12 PM PDT            4.03            559         0      Not Applicable
  05/02/2026 01 PM PDT            4.03            559         0      Not Applicable
  05/02/2026 02 PM PDT            4.02            555         -      Not Applicable
  05/02/2026 03 PM PDT            4.02            555         0      Not Applicable
  05/02/2026 04 PM PDT            4.01            551         -      Not Applicable
  05/02/2026 05 PM PDT            4.01            551         0      Not Applicable
  05/02/2026 06 PM PDT            4.01            551         0      Not Applicable
  05/02/2026 07 PM PDT            4.00            547         -      Not Applicable
  05/02/2026 08 PM PDT            4.00            547         0      Not Applicable
  05/02/2026 09 PM PDT            4.00            547         0      Not Applicable
  05/02/2026 10 PM PDT            3.99            543         -      Not Applicable
  05/02/2026 11 PM PDT            3.99            543         0      Not Applicable
  05/03/2026 12 AM PDT            3.99            543         0      Not Applicable
  05/03/2026 01 AM PDT            3.98            539         -      Not Applicable
  05/03/2026 02 AM PDT            3.98            539         0      Not Applicable
  05/03/2026 03 AM PDT            3.98            539         0      Not Applicable
  05/03/2026 04 AM PDT            3.97            535         -      Not Applicable
  05/03/2026 05 AM PDT            3.97            535         0      Not Applicable
  05/03/2026 06 AM PDT            3.97            535         0      Not Applicable
  05/03/2026 07 AM PDT            3.96            531         -      Not Applicable
  05/03/2026 08 AM PDT            3.96            531         0      Not Applicable
  05/03/2026 09 AM PDT            3.96            531         0      Not Applicable
  05/03/2026 10 AM PDT            3.95            527         -      Not Applicable
  05/03/2026 11 AM PDT            3.95            527         0      Not Applicable
  05/03/2026 12 PM PDT            3.95            527         0      Not Applicable
  05/03/2026 01 PM PDT            3.94            523         -      Not Applicable
  05/03/2026 02 PM PDT            3.94            523         0      Not Applicable
  05/03/2026 03 PM PDT            3.94            523         0      Not Applicable
  05/03/2026 04 PM PDT            3.94            523         0      Not Applicable
  05/03/2026 05 PM PDT            3.93            520         -      Not Applicable
  05/03/2026 06 PM PDT            3.93            520         0      Not Applicable
  05/03/2026 07 PM PDT            3.93            520         0      Not Applicable
  05/03/2026 08 PM PDT            3.92            516         -      Not Applicable
  05/03/2026 09 PM PDT            3.92            516         0      Not Applicable
  05/03/2026 10 PM PDT            3.92            516         0      Not Applicable
  05/03/2026 11 PM PDT            3.92            516         0      Not Applicable
  05/04/2026 12 AM PDT            3.92            516         0      Not Applicable
  05/04/2026 01 AM PDT            3.91            512         -      Not Applicable
  05/04/2026 02 AM PDT            3.91            512         0      Not Applicable
  05/04/2026 03 AM PDT            3.91            512         0      Not Applicable
  05/04/2026 04 AM PDT            3.91            512         0      Not Applicable
  05/04/2026 05 AM PDT            3.90            508         -      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.