SOUTH FORK TRINITY RIVER - HYAMPOM (HYMC1)
Latitude: 40.65º NLongitude: 123.49º WElevation: 1211 Feet
Location: Trinity County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Dec 27 2025 at 9:16 AM PSTNext Issuance: Dec 28 2025 at 9:00 AM PST
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:  12/27/2025 at 09:18 AM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/22/2025 at 09:00 AM PST
# Maximum Observed Stage:                       13.72 Feet
# Maximum Observed Flow:                        13805 cfs
#
# Earliest Date & Time of Maximum Forecast:     12/27/2025 at 10:00 AM PST
# Maximum Forecast Stage:                       11.24 Feet
# Maximum Forecast Flow:                        8841 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/22/2025 09 AM PST           13.72          13805                Not Applicable
  12/22/2025 10 AM PST           13.46          13234         -      Not Applicable
  12/22/2025 11 AM PST           13.19          12654         -      Not Applicable
  12/22/2025 12 PM PST           12.91          12065         -      Not Applicable
  12/22/2025 01 PM PST           12.68          11592         -      Not Applicable
  12/22/2025 02 PM PST           12.47          11168         -      Not Applicable
  12/22/2025 03 PM PST           12.29          10811         -      Not Applicable
  12/22/2025 04 PM PST           12.11          10459         -      Not Applicable
  12/22/2025 05 PM PST           11.89          10037         -      Not Applicable
  12/22/2025 06 PM PST           11.69           9661         -      Not Applicable
  12/22/2025 07 PM PST           11.57           9439         -      Not Applicable
  12/22/2025 08 PM PST           11.38           9092         -      Not Applicable
  12/22/2025 09 PM PST           11.25           8859         -      Not Applicable
  12/22/2025 10 PM PST           11.09           8575         -      Not Applicable
  12/22/2025 11 PM PST           10.92           8279         -      Not Applicable
  12/23/2025 12 AM PST           10.81           8090         -      Not Applicable
  12/23/2025 01 AM PST           10.69           7887         -      Not Applicable
  12/23/2025 02 AM PST           10.56           7669         -      Not Applicable
  12/23/2025 03 AM PST           10.45           7487         -      Not Applicable
  12/23/2025 04 AM PST           10.35           7324         -      Not Applicable
  12/23/2025 05 AM PST           10.23           7130         -      Not Applicable
  12/23/2025 06 AM PST           10.14           6986         -      Not Applicable
  12/23/2025 07 AM PST           10.07           6875         -      Not Applicable
  12/23/2025 08 AM PST            9.97           6719         -      Not Applicable
  12/23/2025 09 AM PST            9.90           6610         -      Not Applicable
  12/23/2025 10 AM PST            9.88           6579         -      Not Applicable
  12/23/2025 11 AM PST            9.83           6502         -      Not Applicable
  12/23/2025 12 PM PST            9.81           6472         -      Not Applicable
  12/23/2025 01 PM PST            9.81           6472         0      Not Applicable
  12/23/2025 02 PM PST            9.80           6456         -      Not Applicable
  12/23/2025 03 PM PST            9.79           6441         -      Not Applicable
  12/23/2025 04 PM PST            9.82           6487         +      Not Applicable
  12/23/2025 05 PM PST            9.80           6456         -      Not Applicable
  12/23/2025 06 PM PST            9.73           6350         -      Not Applicable
  12/23/2025 07 PM PST            9.69           6289         -      Not Applicable
  12/23/2025 08 PM PST            9.60           6154         -      Not Applicable
  12/23/2025 09 PM PST            9.61           6169         +      Not Applicable
  12/23/2025 10 PM PST            9.52           6035         -      Not Applicable
  12/23/2025 11 PM PST            9.50           6006         -      Not Applicable
  12/24/2025 12 AM PST            9.47           5962         -      Not Applicable
  12/24/2025 01 AM PST            9.46           5947         -      Not Applicable
  12/24/2025 02 AM PST            9.45           5932         -      Not Applicable
  12/24/2025 03 AM PST            9.50           6006         +      Not Applicable
  12/24/2025 04 AM PST            9.56           6095         +      Not Applicable
  12/24/2025 05 AM PST            9.66           6244         +      Not Applicable
  12/24/2025 06 AM PST            9.84           6518         +      Not Applicable
  12/24/2025 07 AM PST            9.98           6734         +      Not Applicable
  12/24/2025 08 AM PST           10.10           6923         +      Not Applicable
  12/24/2025 09 AM PST           10.26           7178         +      Not Applicable
  12/24/2025 10 AM PST           10.34           7308         +      Not Applicable
  12/24/2025 11 AM PST           10.45           7487         +      Not Applicable
  12/24/2025 12 PM PST           10.57           7686         +      Not Applicable
  12/24/2025 01 PM PST           10.68           7870         +      Not Applicable
  12/24/2025 02 PM PST           10.75           7988         +      Not Applicable
  12/24/2025 03 PM PST           10.78           8039         +      Not Applicable
  12/24/2025 04 PM PST           10.83           8125         +      Not Applicable
  12/24/2025 05 PM PST           10.85           8159         +      Not Applicable
  12/24/2025 06 PM PST           10.78           8039         -      Not Applicable
  12/24/2025 07 PM PST           10.70           7904         -      Not Applicable
  12/24/2025 08 PM PST           10.59           7719         -      Not Applicable
  12/24/2025 09 PM PST           10.55           7652         -      Not Applicable
  12/24/2025 10 PM PST           10.42           7438         -      Not Applicable
  12/24/2025 11 PM PST           10.37           7356         -      Not Applicable
  12/25/2025 12 AM PST           10.29           7227         -      Not Applicable
  12/25/2025 01 AM PST           10.22           7114         -      Not Applicable
  12/25/2025 02 AM PST           10.14           6986         -      Not Applicable
  12/25/2025 03 AM PST           10.16           7018         +      Not Applicable
  12/25/2025 04 AM PST           10.16           7018         0      Not Applicable
  12/25/2025 05 AM PST           10.20           7082         +      Not Applicable
  12/25/2025 06 AM PST           10.21           7098         +      Not Applicable
  12/25/2025 07 AM PST           10.22           7114         +      Not Applicable
  12/25/2025 08 AM PST           10.34           7308         +      Not Applicable
  12/25/2025 09 AM PST           10.42           7438         +      Not Applicable
  12/25/2025 10 AM PST           10.46           7504         +      Not Applicable
  12/25/2025 11 AM PST           10.52           7603         +      Not Applicable
  12/25/2025 12 PM PST           10.60           7736         +      Not Applicable
  12/25/2025 01 PM PST           10.69           7887         +      Not Applicable
  12/25/2025 02 PM PST           10.82           8108         +      Not Applicable
  12/25/2025 03 PM PST           10.87           8193         +      Not Applicable
  12/25/2025 04 PM PST           10.90           8245         +      Not Applicable
  12/25/2025 05 PM PST           10.93           8297         +      Not Applicable
  12/25/2025 06 PM PST           10.90           8245         -      Not Applicable
  12/25/2025 07 PM PST           10.98           8383         +      Not Applicable
  12/25/2025 08 PM PST           11.03           8470         +      Not Applicable
  12/25/2025 09 PM PST           11.10           8593         +      Not Applicable
  12/25/2025 10 PM PST           11.18           8734         +      Not Applicable
  12/25/2025 11 PM PST           11.23           8823         +      Not Applicable
  12/26/2025 12 AM PST           11.24           8841         +      Not Applicable
  12/26/2025 01 AM PST           11.28           8912         +      Not Applicable
  12/26/2025 02 AM PST           11.34           9020         +      Not Applicable
  12/26/2025 03 AM PST           11.42           9165         +      Not Applicable
  12/26/2025 04 AM PST           11.51           9329         +      Not Applicable
  12/26/2025 05 AM PST           11.60           9494         +      Not Applicable
  12/26/2025 06 AM PST           11.63           9550         +      Not Applicable
  12/26/2025 07 AM PST           11.67           9624         +      Not Applicable
  12/26/2025 08 AM PST           11.63           9550         -      Not Applicable
  12/26/2025 09 AM PST           11.66           9606         +      Not Applicable
  12/26/2025 10 AM PST           11.63           9550         -      Not Applicable
  12/26/2025 11 AM PST           11.65           9587         +      Not Applicable
  12/26/2025 12 PM PST           11.68           9643         +      Not Applicable
  12/26/2025 01 PM PST           11.73           9736         +      Not Applicable
  12/26/2025 02 PM PST           11.82           9905         +      Not Applicable
  12/26/2025 03 PM PST           11.83           9924         +      Not Applicable
  12/26/2025 04 PM PST           11.95          10152         +      Not Applicable
  12/26/2025 05 PM PST           12.04          10324         +      Not Applicable
  12/26/2025 06 PM PST           12.16          10556         +      Not Applicable
  12/26/2025 07 PM PST           12.29          10811         +      Not Applicable
  12/26/2025 08 PM PST           12.33          10890         +      Not Applicable
  12/26/2025 09 PM PST           12.36          10949         +      Not Applicable
  12/26/2025 10 PM PST           12.39          11009         +      Not Applicable
  12/26/2025 11 PM PST           12.30          10830         -      Not Applicable
  12/27/2025 12 AM PST           12.29          10811         -      Not Applicable
  12/27/2025 01 AM PST           12.12          10479         -      Not Applicable
  12/27/2025 02 AM PST           12.00          10247         -      Not Applicable
  12/27/2025 03 AM PST           11.92          10094         -      Not Applicable
  12/27/2025 04 AM PST           11.83           9924         -      Not Applicable
  12/27/2025 05 AM PST           11.72           9717         -      Not Applicable
  12/27/2025 06 AM PST           11.63           9550         -      Not Applicable
  12/27/2025 07 AM PST           11.53           9366         -      Not Applicable
  12/27/2025 08 AM PST           11.43           9183         -      Not Applicable
  12/27/2025 09 AM PST           11.33           9002         -      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/27/2025 10 AM PST           11.24           8841                Not Applicable
  12/27/2025 11 AM PST           11.16           8699         -      Not Applicable
  12/27/2025 12 PM PST           11.08           8558         -      Not Applicable
  12/27/2025 01 PM PST           11.01           8435         -      Not Applicable
  12/27/2025 02 PM PST           10.94           8314         -      Not Applicable
  12/27/2025 03 PM PST           10.87           8193         -      Not Applicable
  12/27/2025 04 PM PST           10.80           8073         -      Not Applicable
  12/27/2025 05 PM PST           10.74           7971         -      Not Applicable
  12/27/2025 06 PM PST           10.68           7870         -      Not Applicable
  12/27/2025 07 PM PST           10.62           7769         -      Not Applicable
  12/27/2025 08 PM PST           10.57           7686         -      Not Applicable
  12/27/2025 09 PM PST           10.51           7586         -      Not Applicable
  12/27/2025 10 PM PST           10.46           7504         -      Not Applicable
  12/27/2025 11 PM PST           10.41           7422         -      Not Applicable
  12/28/2025 12 AM PST           10.36           7340         -      Not Applicable
  12/28/2025 01 AM PST           10.32           7275         -      Not Applicable
  12/28/2025 02 AM PST           10.27           7194         -      Not Applicable
  12/28/2025 03 AM PST           10.22           7114         -      Not Applicable
  12/28/2025 04 AM PST           10.18           7050         -      Not Applicable
  12/28/2025 05 AM PST           10.14           6986         -      Not Applicable
  12/28/2025 06 AM PST           10.09           6907         -      Not Applicable
  12/28/2025 07 AM PST           10.05           6844         -      Not Applicable
  12/28/2025 08 AM PST           10.00           6766         -      Not Applicable
  12/28/2025 09 AM PST            9.96           6703         -      Not Applicable
  12/28/2025 10 AM PST            9.91           6626         -      Not Applicable
  12/28/2025 11 AM PST            9.87           6564         -      Not Applicable
  12/28/2025 12 PM PST            9.82           6487         -      Not Applicable
  12/28/2025 01 PM PST            9.78           6426         -      Not Applicable
  12/28/2025 02 PM PST            9.74           6365         -      Not Applicable
  12/28/2025 03 PM PST            9.70           6304         -      Not Applicable
  12/28/2025 04 PM PST            9.66           6244         -      Not Applicable
  12/28/2025 05 PM PST            9.63           6199         -      Not Applicable
  12/28/2025 06 PM PST            9.60           6154         -      Not Applicable
  12/28/2025 07 PM PST            9.57           6110         -      Not Applicable
  12/28/2025 08 PM PST            9.54           6065         -      Not Applicable
  12/28/2025 09 PM PST            9.50           6006         -      Not Applicable
  12/28/2025 10 PM PST            9.47           5962         -      Not Applicable
  12/28/2025 11 PM PST            9.44           5918         -      Not Applicable
  12/29/2025 12 AM PST            9.40           5859         -      Not Applicable
  12/29/2025 01 AM PST            9.36           5801         -      Not Applicable
  12/29/2025 02 AM PST            9.32           5743         -      Not Applicable
  12/29/2025 03 AM PST            9.28           5685         -      Not Applicable
  12/29/2025 04 AM PST            9.24           5626         -      Not Applicable
  12/29/2025 05 AM PST            9.21           5583         -      Not Applicable
  12/29/2025 06 AM PST            9.17           5524         -      Not Applicable
  12/29/2025 07 AM PST            9.13           5466         -      Not Applicable
  12/29/2025 08 AM PST            9.10           5423         -      Not Applicable
  12/29/2025 09 AM PST            9.06           5366         -      Not Applicable
  12/29/2025 10 AM PST            9.03           5323         -      Not Applicable
  12/29/2025 11 AM PST            9.00           5280         -      Not Applicable
  12/29/2025 12 PM PST            8.96           5219         -      Not Applicable
  12/29/2025 01 PM PST            8.94           5189         -      Not Applicable
  12/29/2025 02 PM PST            8.91           5144         -      Not Applicable
  12/29/2025 03 PM PST            8.88           5099         -      Not Applicable
  12/29/2025 04 PM PST            8.86           5069         -      Not Applicable
  12/29/2025 05 PM PST            8.83           5024         -      Not Applicable
  12/29/2025 06 PM PST            8.81           4995         -      Not Applicable
  12/29/2025 07 PM PST            8.79           4964         -      Not Applicable
  12/29/2025 08 PM PST            8.78           4949         -      Not Applicable
  12/29/2025 09 PM PST            8.76           4919         -      Not Applicable
  12/29/2025 10 PM PST            8.74           4889         -      Not Applicable
  12/29/2025 11 PM PST            8.73           4873         -      Not Applicable
  12/30/2025 12 AM PST            8.71           4843         -      Not Applicable
  12/30/2025 01 AM PST            8.69           4814         -      Not Applicable
  12/30/2025 02 AM PST            8.66           4769         -      Not Applicable
  12/30/2025 03 AM PST            8.64           4739         -      Not Applicable
  12/30/2025 04 AM PST            8.61           4695         -      Not Applicable
  12/30/2025 05 AM PST            8.59           4666         -      Not Applicable
  12/30/2025 06 AM PST            8.56           4622         -      Not Applicable
  12/30/2025 07 AM PST            8.53           4578         -      Not Applicable
  12/30/2025 08 AM PST            8.50           4535         -      Not Applicable
  12/30/2025 09 AM PST            8.47           4492         -      Not Applicable
  12/30/2025 10 AM PST            8.45           4463         -      Not Applicable
  12/30/2025 11 AM PST            8.42           4420         -      Not Applicable
  12/30/2025 12 PM PST            8.39           4378         -      Not Applicable
  12/30/2025 01 PM PST            8.37           4350         -      Not Applicable
  12/30/2025 02 PM PST            8.34           4308         -      Not Applicable
  12/30/2025 03 PM PST            8.32           4280         -      Not Applicable
  12/30/2025 04 PM PST            8.30           4252         -      Not Applicable
  12/30/2025 05 PM PST            8.28           4224         -      Not Applicable
  12/30/2025 06 PM PST            8.26           4196         -      Not Applicable
  12/30/2025 07 PM PST            8.24           4169         -      Not Applicable
  12/30/2025 08 PM PST            8.22           4141         -      Not Applicable
  12/30/2025 09 PM PST            8.20           4114         -      Not Applicable
  12/30/2025 10 PM PST            8.18           4087         -      Not Applicable
  12/30/2025 11 PM PST            8.16           4060         -      Not Applicable
  12/31/2025 12 AM PST            8.13           4019         -      Not Applicable
  12/31/2025 01 AM PST            8.11           3993         -      Not Applicable
  12/31/2025 02 AM PST            8.08           3952         -      Not Applicable
  12/31/2025 03 AM PST            8.05           3913         -      Not Applicable
  12/31/2025 04 AM PST            8.02           3873         -      Not Applicable
  12/31/2025 05 AM PST            8.00           3847         -      Not Applicable
  12/31/2025 06 AM PST            7.97           3808         -      Not Applicable
  12/31/2025 07 AM PST            7.94           3769         -      Not Applicable
  12/31/2025 08 AM PST            7.91           3730         -      Not Applicable
  12/31/2025 09 AM PST            7.88           3691         -      Not Applicable
  12/31/2025 10 AM PST            7.85           3653         -      Not Applicable
  12/31/2025 11 AM PST            7.84           3640         -      Not Applicable
  12/31/2025 12 PM PST            7.82           3615         -      Not Applicable
  12/31/2025 01 PM PST            7.80           3590         -      Not Applicable
  12/31/2025 02 PM PST            7.79           3577         -      Not Applicable
  12/31/2025 03 PM PST            7.77           3552         -      Not Applicable
  12/31/2025 04 PM PST            7.76           3539         -      Not Applicable
  12/31/2025 05 PM PST            7.74           3514         -      Not Applicable
  12/31/2025 06 PM PST            7.73           3502         -      Not Applicable
  12/31/2025 07 PM PST            7.72           3490         -      Not Applicable
  12/31/2025 08 PM PST            7.70           3465         -      Not Applicable
  12/31/2025 09 PM PST            7.69           3453         -      Not Applicable
  12/31/2025 10 PM PST            7.67           3428         -      Not Applicable
  12/31/2025 11 PM PST            7.66           3416         -      Not Applicable
  01/01/2026 12 AM PST            7.65           3403         -      Not Applicable
  01/01/2026 01 AM PST            7.63           3379         -      Not Applicable
  01/01/2026 02 AM PST            7.62           3367         -      Not Applicable
  01/01/2026 03 AM PST            7.60           3343         -      Not Applicable
  01/01/2026 04 AM PST            7.59           3331         -      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.