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 15 2026 at 7:25 AM PDTNext Issuance: Apr 15 2026 at 3:00 PM 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:  04/15/2026 at 07:28 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  04/13/2026 at 04:00 AM PDT
# Maximum Observed Stage:                       5.60 Feet
# Maximum Observed Flow:                        1407 cfs
#
# Earliest Date & Time of Maximum Forecast:     04/20/2026 at 05:00 AM PDT
# Maximum Forecast Stage:                       5.14 Feet
# Maximum Forecast Flow:                        1112 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  04/10/2026 07 AM PDT            4.28            665                Not Applicable
  04/10/2026 08 AM PDT            4.30            674         +      Not Applicable
  04/10/2026 09 AM PDT            4.32            683         +      Not Applicable
  04/10/2026 10 AM PDT            4.34            692         +      Not Applicable
  04/10/2026 11 AM PDT            4.36            701         +      Not Applicable
  04/10/2026 12 PM PDT            4.38            710         +      Not Applicable
  04/10/2026 01 PM PDT            4.38            710         0      Not Applicable
  04/10/2026 02 PM PDT            4.39            715         +      Not Applicable
  04/10/2026 03 PM PDT            4.40            719         +      Not Applicable
  04/10/2026 04 PM PDT            4.42            729         +      Not Applicable
  04/10/2026 05 PM PDT            4.44            738         +      Not Applicable
  04/10/2026 06 PM PDT            4.45            743         +      Not Applicable
  04/10/2026 07 PM PDT            4.45            743         0      Not Applicable
  04/10/2026 08 PM PDT            4.45            743         0      Not Applicable
  04/10/2026 09 PM PDT            4.44            738         -      Not Applicable
  04/10/2026 10 PM PDT            4.44            738         0      Not Applicable
  04/10/2026 11 PM PDT            4.43            733         -      Not Applicable
  04/11/2026 12 AM PDT            4.41            724         -      Not Applicable
  04/11/2026 01 AM PDT            4.41            724         0      Not Applicable
  04/11/2026 02 AM PDT            4.40            719         -      Not Applicable
  04/11/2026 03 AM PDT            4.39            715         -      Not Applicable
  04/11/2026 04 AM PDT            4.38            710         -      Not Applicable
  04/11/2026 05 AM PDT            4.38            710         0      Not Applicable
  04/11/2026 06 AM PDT            4.38            710         0      Not Applicable
  04/11/2026 07 AM PDT            4.37            705         -      Not Applicable
  04/11/2026 08 AM PDT            4.39            715         +      Not Applicable
  04/11/2026 09 AM PDT            4.39            715         0      Not Applicable
  04/11/2026 10 AM PDT            4.40            719         +      Not Applicable
  04/11/2026 11 AM PDT            4.42            729         +      Not Applicable
  04/11/2026 12 PM PDT            4.43            733         +      Not Applicable
  04/11/2026 01 PM PDT            4.44            738         +      Not Applicable
  04/11/2026 02 PM PDT            4.44            738         0      Not Applicable
  04/11/2026 03 PM PDT            4.48            757         +      Not Applicable
  04/11/2026 04 PM PDT            4.46            747         -      Not Applicable
  04/11/2026 05 PM PDT            4.51            771         +      Not Applicable
  04/11/2026 06 PM PDT            4.53            781         +      Not Applicable
  04/11/2026 07 PM PDT            4.53            781         0      Not Applicable
  04/11/2026 08 PM PDT            4.57            801         +      Not Applicable
  04/11/2026 09 PM PDT            4.59            811         +      Not Applicable
  04/11/2026 10 PM PDT            4.59            811         0      Not Applicable
  04/11/2026 11 PM PDT            4.60            816         +      Not Applicable
  04/12/2026 12 AM PDT            4.62            826         +      Not Applicable
  04/12/2026 01 AM PDT            4.64            836         +      Not Applicable
  04/12/2026 02 AM PDT            4.65            841         +      Not Applicable
  04/12/2026 03 AM PDT            4.67            851         +      Not Applicable
  04/12/2026 04 AM PDT            4.69            861         +      Not Applicable
  04/12/2026 05 AM PDT            4.74            888         +      Not Applicable
  04/12/2026 06 AM PDT            4.80            919         +      Not Applicable
  04/12/2026 07 AM PDT            4.87            957         +      Not Applicable
  04/12/2026 08 AM PDT            4.90            974         +      Not Applicable
  04/12/2026 09 AM PDT            4.97           1013         +      Not Applicable
  04/12/2026 10 AM PDT            5.03           1047         +      Not Applicable
  04/12/2026 11 AM PDT            5.08           1076         +      Not Applicable
  04/12/2026 12 PM PDT            5.13           1106         +      Not Applicable
  04/12/2026 01 PM PDT            5.17           1130         +      Not Applicable
  04/12/2026 02 PM PDT            5.22           1160         +      Not Applicable
  04/12/2026 03 PM PDT            5.24           1173         +      Not Applicable
  04/12/2026 04 PM PDT            5.28           1198         +      Not Applicable
  04/12/2026 05 PM PDT            5.33           1229         +      Not Applicable
  04/12/2026 06 PM PDT            5.34           1235         +      Not Applicable
  04/12/2026 07 PM PDT            5.35           1242         +      Not Applicable
  04/12/2026 08 PM PDT            5.38           1261         +      Not Applicable
  04/12/2026 09 PM PDT            5.41           1280         +      Not Applicable
  04/12/2026 10 PM PDT            5.44           1300         +      Not Applicable
  04/12/2026 11 PM PDT            5.50           1339         +      Not Applicable
  04/13/2026 12 AM PDT            5.53           1359         +      Not Applicable
  04/13/2026 01 AM PDT            5.54           1366         +      Not Applicable
  04/13/2026 02 AM PDT            5.55           1373         +      Not Applicable
  04/13/2026 03 AM PDT            5.57           1386         +      Not Applicable
  04/13/2026 04 AM PDT            5.60           1407         +      Not Applicable
  04/13/2026 05 AM PDT            5.57           1386         -      Not Applicable
  04/13/2026 06 AM PDT            5.57           1386         0      Not Applicable
  04/13/2026 07 AM PDT            5.56           1380         -      Not Applicable
  04/13/2026 08 AM PDT            5.56           1380         0      Not Applicable
  04/13/2026 09 AM PDT            5.54           1366         -      Not Applicable
  04/13/2026 10 AM PDT            5.55           1373         +      Not Applicable
  04/13/2026 11 AM PDT            5.53           1359         -      Not Applicable
  04/13/2026 12 PM PDT            5.54           1366         +      Not Applicable
  04/13/2026 01 PM PDT            5.54           1366         0      Not Applicable
  04/13/2026 02 PM PDT            5.52           1353         -      Not Applicable
  04/13/2026 03 PM PDT            5.51           1346         -      Not Applicable
  04/13/2026 04 PM PDT            5.49           1333         -      Not Applicable
  04/13/2026 05 PM PDT            5.49           1333         0      Not Applicable
  04/13/2026 06 PM PDT            5.47           1319         -      Not Applicable
  04/13/2026 07 PM PDT            5.45           1306         -      Not Applicable
  04/13/2026 08 PM PDT            5.42           1287         -      Not Applicable
  04/13/2026 09 PM PDT            5.42           1287         0      Not Applicable
  04/13/2026 10 PM PDT            5.39           1267         -      Not Applicable
  04/13/2026 11 PM PDT            5.37           1254         -      Not Applicable
  04/14/2026 12 AM PDT            5.34           1235         -      Not Applicable
  04/14/2026 01 AM PDT            5.35           1242         +      Not Applicable
  04/14/2026 02 AM PDT            5.33           1229         -      Not Applicable
  04/14/2026 03 AM PDT            5.31           1216         -      Not Applicable
  04/14/2026 04 AM PDT            5.30           1210         -      Not Applicable
  04/14/2026 05 AM PDT            5.27           1191         -      Not Applicable
  04/14/2026 06 AM PDT            5.26           1185         -      Not Applicable
  04/14/2026 07 AM PDT            5.25           1179         -      Not Applicable
  04/14/2026 08 AM PDT            5.23           1167         -      Not Applicable
  04/14/2026 09 AM PDT            5.24           1173         +      Not Applicable
  04/14/2026 10 AM PDT            5.24           1173         0      Not Applicable
  04/14/2026 11 AM PDT            5.22           1160         -      Not Applicable
  04/14/2026 12 PM PDT            5.22           1160         0      Not Applicable
  04/14/2026 01 PM PDT            5.22           1160         0      Not Applicable
  04/14/2026 02 PM PDT            5.22           1160         0      Not Applicable
  04/14/2026 03 PM PDT            5.20           1148         -      Not Applicable
  04/14/2026 04 PM PDT            5.18           1136         -      Not Applicable
  04/14/2026 05 PM PDT            5.20           1148         +      Not Applicable
  04/14/2026 06 PM PDT            5.17           1130         -      Not Applicable
  04/14/2026 07 PM PDT            5.18           1136         +      Not Applicable
  04/14/2026 08 PM PDT            5.15           1118         -      Not Applicable
  04/14/2026 09 PM PDT            5.14           1112         -      Not Applicable
  04/14/2026 10 PM PDT            5.13           1106         -      Not Applicable
  04/14/2026 11 PM PDT            5.11           1094         -      Not Applicable
  04/15/2026 12 AM PDT            5.10           1088         -      Not Applicable
  04/15/2026 01 AM PDT            5.07           1071         -      Not Applicable
  04/15/2026 02 AM PDT            5.08           1076         +      Not Applicable
  04/15/2026 03 AM PDT            5.06           1065         -      Not Applicable
  04/15/2026 04 AM PDT            5.03           1047         -      Not Applicable
  04/15/2026 05 AM PDT            5.03           1047         0      Not Applicable
  04/15/2026 06 AM PDT            5.03           1047         0      Not Applicable
  04/15/2026 07 AM PDT            5.02           1042         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  04/15/2026 08 AM PDT            5.02           1042                Not Applicable
  04/15/2026 09 AM PDT            5.02           1042         0      Not Applicable
  04/15/2026 10 AM PDT            5.01           1036         -      Not Applicable
  04/15/2026 11 AM PDT            5.01           1036         0      Not Applicable
  04/15/2026 12 PM PDT            5.01           1036         0      Not Applicable
  04/15/2026 01 PM PDT            5.01           1036         0      Not Applicable
  04/15/2026 02 PM PDT            5.00           1030         -      Not Applicable
  04/15/2026 03 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 04 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 05 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 06 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 07 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 08 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 09 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 10 PM PDT            5.00           1030         0      Not Applicable
  04/15/2026 11 PM PDT            5.00           1030         0      Not Applicable
  04/16/2026 12 AM PDT            5.00           1030         0      Not Applicable
  04/16/2026 01 AM PDT            5.00           1030         0      Not Applicable
  04/16/2026 02 AM PDT            5.01           1036         +      Not Applicable
  04/16/2026 03 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 04 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 05 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 06 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 07 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 08 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 09 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 10 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 11 AM PDT            5.01           1036         0      Not Applicable
  04/16/2026 12 PM PDT            5.00           1030         -      Not Applicable
  04/16/2026 01 PM PDT            5.00           1030         0      Not Applicable
  04/16/2026 02 PM PDT            4.99           1024         -      Not Applicable
  04/16/2026 03 PM PDT            4.99           1024         0      Not Applicable
  04/16/2026 04 PM PDT            4.98           1019         -      Not Applicable
  04/16/2026 05 PM PDT            4.98           1019         0      Not Applicable
  04/16/2026 06 PM PDT            4.97           1013         -      Not Applicable
  04/16/2026 07 PM PDT            4.96           1007         -      Not Applicable
  04/16/2026 08 PM PDT            4.95           1002         -      Not Applicable
  04/16/2026 09 PM PDT            4.95           1002         0      Not Applicable
  04/16/2026 10 PM PDT            4.94            996         -      Not Applicable
  04/16/2026 11 PM PDT            4.93            991         -      Not Applicable
  04/17/2026 12 AM PDT            4.92            985         -      Not Applicable
  04/17/2026 01 AM PDT            4.91            979         -      Not Applicable
  04/17/2026 02 AM PDT            4.90            974         -      Not Applicable
  04/17/2026 03 AM PDT            4.89            968         -      Not Applicable
  04/17/2026 04 AM PDT            4.89            968         0      Not Applicable
  04/17/2026 05 AM PDT            4.88            963         -      Not Applicable
  04/17/2026 06 AM PDT            4.87            957         -      Not Applicable
  04/17/2026 07 AM PDT            4.87            957         0      Not Applicable
  04/17/2026 08 AM PDT            4.86            952         -      Not Applicable
  04/17/2026 09 AM PDT            4.85            946         -      Not Applicable
  04/17/2026 10 AM PDT            4.85            946         0      Not Applicable
  04/17/2026 11 AM PDT            4.84            941         -      Not Applicable
  04/17/2026 12 PM PDT            4.83            935         -      Not Applicable
  04/17/2026 01 PM PDT            4.83            935         0      Not Applicable
  04/17/2026 02 PM PDT            4.82            930         -      Not Applicable
  04/17/2026 03 PM PDT            4.81            925         -      Not Applicable
  04/17/2026 04 PM PDT            4.81            925         0      Not Applicable
  04/17/2026 05 PM PDT            4.80            919         -      Not Applicable
  04/17/2026 06 PM PDT            4.80            919         0      Not Applicable
  04/17/2026 07 PM PDT            4.79            914         -      Not Applicable
  04/17/2026 08 PM PDT            4.78            909         -      Not Applicable
  04/17/2026 09 PM PDT            4.78            909         0      Not Applicable
  04/17/2026 10 PM PDT            4.77            903         -      Not Applicable
  04/17/2026 11 PM PDT            4.77            903         0      Not Applicable
  04/18/2026 12 AM PDT            4.76            898         -      Not Applicable
  04/18/2026 01 AM PDT            4.76            898         0      Not Applicable
  04/18/2026 02 AM PDT            4.76            898         0      Not Applicable
  04/18/2026 03 AM PDT            4.76            898         0      Not Applicable
  04/18/2026 04 AM PDT            4.75            893         -      Not Applicable
  04/18/2026 05 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 06 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 07 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 08 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 09 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 10 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 11 AM PDT            4.75            893         0      Not Applicable
  04/18/2026 12 PM PDT            4.74            888         -      Not Applicable
  04/18/2026 01 PM PDT            4.74            888         0      Not Applicable
  04/18/2026 02 PM PDT            4.74            888         0      Not Applicable
  04/18/2026 03 PM PDT            4.74            888         0      Not Applicable
  04/18/2026 04 PM PDT            4.74            888         0      Not Applicable
  04/18/2026 05 PM PDT            4.73            882         -      Not Applicable
  04/18/2026 06 PM PDT            4.73            882         0      Not Applicable
  04/18/2026 07 PM PDT            4.73            882         0      Not Applicable
  04/18/2026 08 PM PDT            4.73            882         0      Not Applicable
  04/18/2026 09 PM PDT            4.72            877         -      Not Applicable
  04/18/2026 10 PM PDT            4.72            877         0      Not Applicable
  04/18/2026 11 PM PDT            4.72            877         0      Not Applicable
  04/19/2026 12 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 01 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 02 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 03 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 04 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 05 AM PDT            4.72            877         0      Not Applicable
  04/19/2026 06 AM PDT            4.73            882         +      Not Applicable
  04/19/2026 07 AM PDT            4.73            882         0      Not Applicable
  04/19/2026 08 AM PDT            4.73            882         0      Not Applicable
  04/19/2026 09 AM PDT            4.73            882         0      Not Applicable
  04/19/2026 10 AM PDT            4.73            882         0      Not Applicable
  04/19/2026 11 AM PDT            4.73            882         0      Not Applicable
  04/19/2026 12 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 01 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 02 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 03 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 04 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 05 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 06 PM PDT            4.73            882         0      Not Applicable
  04/19/2026 07 PM PDT            4.74            888         +      Not Applicable
  04/19/2026 08 PM PDT            4.74            888         0      Not Applicable
  04/19/2026 09 PM PDT            4.75            893         +      Not Applicable
  04/19/2026 10 PM PDT            4.77            903         +      Not Applicable
  04/19/2026 11 PM PDT            4.79            914         +      Not Applicable
  04/20/2026 12 AM PDT            4.82            930         +      Not Applicable
  04/20/2026 01 AM PDT            4.86            952         +      Not Applicable
  04/20/2026 02 AM PDT            4.91            979         +      Not Applicable
  04/20/2026 03 AM PDT            4.97           1013         +      Not Applicable
  04/20/2026 04 AM PDT            5.06           1065         +      Not Applicable
  04/20/2026 05 AM PDT            5.14           1112         +      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.