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: May 13 2026 at 7:17 AM PDTNext Issuance: May 14 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:  05/13/2026 at 07:21 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/08/2026 at 12:00 PM PDT
# Maximum Observed Stage:                       3.94 Feet
# Maximum Observed Flow:                        539 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/13/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       3.75 Feet
# Maximum Forecast Flow:                        467 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/08/2026 07 AM PDT            3.93            535                Not Applicable
  05/08/2026 08 AM PDT            3.94            539         +      Not Applicable
  05/08/2026 09 AM PDT            3.93            535         -      Not Applicable
  05/08/2026 10 AM PDT            3.93            535         0      Not Applicable
  05/08/2026 11 AM PDT            3.93            535         0      Not Applicable
  05/08/2026 12 PM PDT            3.94            539         +      Not Applicable
  05/08/2026 01 PM PDT            3.93            535         -      Not Applicable
  05/08/2026 02 PM PDT            3.93            535         0      Not Applicable
  05/08/2026 03 PM PDT            3.93            535         0      Not Applicable
  05/08/2026 04 PM PDT            3.92            531         -      Not Applicable
  05/08/2026 05 PM PDT            3.92            531         0      Not Applicable
  05/08/2026 06 PM PDT            3.91            527         -      Not Applicable
  05/08/2026 07 PM PDT            3.92            531         +      Not Applicable
  05/08/2026 08 PM PDT            3.92            531         0      Not Applicable
  05/08/2026 09 PM PDT            3.90            523         -      Not Applicable
  05/08/2026 10 PM PDT            3.90            523         0      Not Applicable
  05/08/2026 11 PM PDT            3.91            527         +      Not Applicable
  05/09/2026 12 AM PDT            3.90            523         -      Not Applicable
  05/09/2026 01 AM PDT            3.90            523         0      Not Applicable
  05/09/2026 02 AM PDT            3.90            523         0      Not Applicable
  05/09/2026 03 AM PDT            3.90            523         0      Not Applicable
  05/09/2026 04 AM PDT            3.89            520         -      Not Applicable
  05/09/2026 05 AM PDT            3.89            520         0      Not Applicable
  05/09/2026 06 AM PDT            3.89            520         0      Not Applicable
  05/09/2026 07 AM PDT            3.90            523         +      Not Applicable
  05/09/2026 08 AM PDT            3.89            520         -      Not Applicable
  05/09/2026 09 AM PDT            3.89            520         0      Not Applicable
  05/09/2026 10 AM PDT            3.89            520         0      Not Applicable
  05/09/2026 11 AM PDT            3.90            523         +      Not Applicable
  05/09/2026 12 PM PDT            3.89            520         -      Not Applicable
  05/09/2026 01 PM PDT            3.88            516         -      Not Applicable
  05/09/2026 02 PM PDT            3.88            516         0      Not Applicable
  05/09/2026 03 PM PDT            3.88            516         0      Not Applicable
  05/09/2026 04 PM PDT            3.87            512         -      Not Applicable
  05/09/2026 05 PM PDT            3.87            512         0      Not Applicable
  05/09/2026 06 PM PDT            3.87            512         0      Not Applicable
  05/09/2026 07 PM PDT            3.87            512         0      Not Applicable
  05/09/2026 08 PM PDT            3.86            508         -      Not Applicable
  05/09/2026 09 PM PDT            3.86            508         0      Not Applicable
  05/09/2026 10 PM PDT            3.86            508         0      Not Applicable
  05/09/2026 11 PM PDT            3.86            508         0      Not Applicable
  05/10/2026 12 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 01 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 02 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 03 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 04 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 05 AM PDT            3.86            508         0      Not Applicable
  05/10/2026 06 AM PDT            3.85            504         -      Not Applicable
  05/10/2026 07 AM PDT            3.86            508         +      Not Applicable
  05/10/2026 08 AM PDT            3.85            504         -      Not Applicable
  05/10/2026 09 AM PDT            3.85            504         0      Not Applicable
  05/10/2026 10 AM PDT            3.85            504         0      Not Applicable
  05/10/2026 11 AM PDT            3.85            504         0      Not Applicable
  05/10/2026 12 PM PDT            3.85            504         0      Not Applicable
  05/10/2026 01 PM PDT            3.85            504         0      Not Applicable
  05/10/2026 02 PM PDT            3.85            504         0      Not Applicable
  05/10/2026 03 PM PDT            3.85            504         0      Not Applicable
  05/10/2026 04 PM PDT            3.84            500         -      Not Applicable
  05/10/2026 05 PM PDT            3.85            504         +      Not Applicable
  05/10/2026 06 PM PDT            3.84            500         -      Not Applicable
  05/10/2026 07 PM PDT            3.83            497         -      Not Applicable
  05/10/2026 08 PM PDT            3.83            497         0      Not Applicable
  05/10/2026 09 PM PDT            3.83            497         0      Not Applicable
  05/10/2026 10 PM PDT            3.83            497         0      Not Applicable
  05/10/2026 11 PM PDT            3.82            493         -      Not Applicable
  05/11/2026 12 AM PDT            3.81            489         -      Not Applicable
  05/11/2026 01 AM PDT            3.82            493         +      Not Applicable
  05/11/2026 02 AM PDT            3.82            493         0      Not Applicable
  05/11/2026 03 AM PDT            3.81            489         -      Not Applicable
  05/11/2026 04 AM PDT            3.82            493         +      Not Applicable
  05/11/2026 05 AM PDT            3.81            489         -      Not Applicable
  05/11/2026 06 AM PDT            3.81            489         0      Not Applicable
  05/11/2026 07 AM PDT            3.82            493         +      Not Applicable
  05/11/2026 08 AM PDT            3.82            493         0      Not Applicable
  05/11/2026 09 AM PDT            3.81            489         -      Not Applicable
  05/11/2026 10 AM PDT            3.81            489         0      Not Applicable
  05/11/2026 11 AM PDT            3.81            489         0      Not Applicable
  05/11/2026 12 PM PDT            3.82            493         +      Not Applicable
  05/11/2026 01 PM PDT            3.81            489         -      Not Applicable
  05/11/2026 02 PM PDT            3.81            489         0      Not Applicable
  05/11/2026 03 PM PDT            3.82            493         +      Not Applicable
  05/11/2026 04 PM PDT            3.80            485         -      Not Applicable
  05/11/2026 05 PM PDT            3.80            485         0      Not Applicable
  05/11/2026 06 PM PDT            3.80            485         0      Not Applicable
  05/11/2026 07 PM PDT            3.80            485         0      Not Applicable
  05/11/2026 08 PM PDT            3.79            482         -      Not Applicable
  05/11/2026 09 PM PDT            3.79            482         0      Not Applicable
  05/11/2026 10 PM PDT            3.79            482         0      Not Applicable
  05/11/2026 11 PM PDT            3.79            482         0      Not Applicable
  05/12/2026 12 AM PDT            3.77            474         -      Not Applicable
  05/12/2026 01 AM PDT            3.77            474         0      Not Applicable
  05/12/2026 02 AM PDT            3.77            474         0      Not Applicable
  05/12/2026 03 AM PDT            3.79            482         +      Not Applicable
  05/12/2026 04 AM PDT            3.78            478         -      Not Applicable
  05/12/2026 05 AM PDT            3.79            482         +      Not Applicable
  05/12/2026 06 AM PDT            3.79            482         0      Not Applicable
  05/12/2026 07 AM PDT            3.78            478         -      Not Applicable
  05/12/2026 08 AM PDT            3.79            482         +      Not Applicable
  05/12/2026 09 AM PDT            3.78            478         -      Not Applicable
  05/12/2026 10 AM PDT            3.79            482         +      Not Applicable
  05/12/2026 11 AM PDT            3.79            482         0      Not Applicable
  05/12/2026 12 PM PDT            3.78            478         -      Not Applicable
  05/12/2026 01 PM PDT            3.78            478         0      Not Applicable
  05/12/2026 02 PM PDT            3.77            474         -      Not Applicable
  05/12/2026 03 PM PDT            3.78            478         +      Not Applicable
  05/12/2026 04 PM PDT            3.77            474         -      Not Applicable
  05/12/2026 05 PM PDT            3.78            478         +      Not Applicable
  05/12/2026 06 PM PDT            3.78            478         0      Not Applicable
  05/12/2026 07 PM PDT            3.77            474         -      Not Applicable
  05/12/2026 08 PM PDT            3.77            474         0      Not Applicable
  05/12/2026 09 PM PDT            3.76            471         -      Not Applicable
  05/12/2026 10 PM PDT            3.76            471         0      Not Applicable
  05/12/2026 11 PM PDT            3.76            471         0      Not Applicable
  05/13/2026 12 AM PDT            3.76            471         0      Not Applicable
  05/13/2026 01 AM PDT            3.76            471         0      Not Applicable
  05/13/2026 02 AM PDT            3.76            471         0      Not Applicable
  05/13/2026 03 AM PDT            3.76            471         0      Not Applicable
  05/13/2026 04 AM PDT            3.76            471         0      Not Applicable
  05/13/2026 05 AM PDT            3.75            467         -      Not Applicable
  05/13/2026 06 AM PDT            3.75            467         0      Not Applicable
  05/13/2026 07 AM PDT            3.75            467         0      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/13/2026 08 AM PDT            3.75            467                Not Applicable
  05/13/2026 09 AM PDT            3.75            467         0      Not Applicable
  05/13/2026 10 AM PDT            3.75            467         0      Not Applicable
  05/13/2026 11 AM PDT            3.74            464         -      Not Applicable
  05/13/2026 12 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 01 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 02 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 03 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 04 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 05 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 06 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 07 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 08 PM PDT            3.74            464         0      Not Applicable
  05/13/2026 09 PM PDT            3.73            460         -      Not Applicable
  05/13/2026 10 PM PDT            3.73            460         0      Not Applicable
  05/13/2026 11 PM PDT            3.73            460         0      Not Applicable
  05/14/2026 12 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 01 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 02 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 03 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 04 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 05 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 06 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 07 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 08 AM PDT            3.73            460         0      Not Applicable
  05/14/2026 09 AM PDT            3.72            456         -      Not Applicable
  05/14/2026 10 AM PDT            3.72            456         0      Not Applicable
  05/14/2026 11 AM PDT            3.72            456         0      Not Applicable
  05/14/2026 12 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 01 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 02 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 03 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 04 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 05 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 06 PM PDT            3.72            456         0      Not Applicable
  05/14/2026 07 PM PDT            3.71            453         -      Not Applicable
  05/14/2026 08 PM PDT            3.71            453         0      Not Applicable
  05/14/2026 09 PM PDT            3.71            453         0      Not Applicable
  05/14/2026 10 PM PDT            3.71            453         0      Not Applicable
  05/14/2026 11 PM PDT            3.71            453         0      Not Applicable
  05/15/2026 12 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 01 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 02 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 03 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 04 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 05 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 06 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 07 AM PDT            3.71            453         0      Not Applicable
  05/15/2026 08 AM PDT            3.70            449         -      Not Applicable
  05/15/2026 09 AM PDT            3.70            449         0      Not Applicable
  05/15/2026 10 AM PDT            3.70            449         0      Not Applicable
  05/15/2026 11 AM PDT            3.70            449         0      Not Applicable
  05/15/2026 12 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 01 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 02 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 03 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 04 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 05 PM PDT            3.70            449         0      Not Applicable
  05/15/2026 06 PM PDT            3.69            446         -      Not Applicable
  05/15/2026 07 PM PDT            3.69            446         0      Not Applicable
  05/15/2026 08 PM PDT            3.69            446         0      Not Applicable
  05/15/2026 09 PM PDT            3.69            446         0      Not Applicable
  05/15/2026 10 PM PDT            3.69            446         0      Not Applicable
  05/15/2026 11 PM PDT            3.69            446         0      Not Applicable
  05/16/2026 12 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 01 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 02 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 03 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 04 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 05 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 06 AM PDT            3.69            446         0      Not Applicable
  05/16/2026 07 AM PDT            3.68            442         -      Not Applicable
  05/16/2026 08 AM PDT            3.68            442         0      Not Applicable
  05/16/2026 09 AM PDT            3.68            442         0      Not Applicable
  05/16/2026 10 AM PDT            3.68            442         0      Not Applicable
  05/16/2026 11 AM PDT            3.68            442         0      Not Applicable
  05/16/2026 12 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 01 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 02 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 03 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 04 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 05 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 06 PM PDT            3.68            442         0      Not Applicable
  05/16/2026 07 PM PDT            3.67            439         -      Not Applicable
  05/16/2026 08 PM PDT            3.67            439         0      Not Applicable
  05/16/2026 09 PM PDT            3.67            439         0      Not Applicable
  05/16/2026 10 PM PDT            3.67            439         0      Not Applicable
  05/16/2026 11 PM PDT            3.67            439         0      Not Applicable
  05/17/2026 12 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 01 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 02 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 03 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 04 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 05 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 06 AM PDT            3.67            439         0      Not Applicable
  05/17/2026 07 AM PDT            3.66            435         -      Not Applicable
  05/17/2026 08 AM PDT            3.66            435         0      Not Applicable
  05/17/2026 09 AM PDT            3.66            435         0      Not Applicable
  05/17/2026 10 AM PDT            3.66            435         0      Not Applicable
  05/17/2026 11 AM PDT            3.66            435         0      Not Applicable
  05/17/2026 12 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 01 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 02 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 03 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 04 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 05 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 06 PM PDT            3.66            435         0      Not Applicable
  05/17/2026 07 PM PDT            3.65            432         -      Not Applicable
  05/17/2026 08 PM PDT            3.65            432         0      Not Applicable
  05/17/2026 09 PM PDT            3.65            432         0      Not Applicable
  05/17/2026 10 PM PDT            3.65            432         0      Not Applicable
  05/17/2026 11 PM PDT            3.65            432         0      Not Applicable
  05/18/2026 12 AM PDT            3.65            432         0      Not Applicable
  05/18/2026 01 AM PDT            3.65            432         0      Not Applicable
  05/18/2026 02 AM PDT            3.65            432         0      Not Applicable
  05/18/2026 03 AM PDT            3.65            432         0      Not Applicable
  05/18/2026 04 AM PDT            3.65            432         0      Not Applicable
  05/18/2026 05 AM PDT            3.65            432         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.