National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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TRINITY RIVER - HOOPA (HOOC1)
Latitude: 41.05º NLongitude: 123.68º WElevation: 333 FeetForecast Type: Official Location
Location: Humboldt County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: May 15 2026 at 7:16 AM PDTNext Issuance: May 16 2026 at 9:00 AM PDT
Action/Monitor: 44.0 FeetMinor Flood: 48.0 FeetModerate Flood: 52.0 FeetMajor Flood: 56.0 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Trinity River - Hoopa (HOOC1)
#
# File Generation Time:  05/15/2026 at 07:17 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/10/2026 at 08:00 PM PDT
# Maximum Observed Stage:                       14.11 Feet
# Maximum Observed Flow:                        3005 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/15/2026 at 08:00 AM PDT
# Maximum Forecast Stage:                       13.75 Feet
# Maximum Forecast Flow:                        2598 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/10/2026 07 AM PDT           14.11           3005                        Normal
  05/10/2026 08 AM PDT           14.11           3005         0              Normal
  05/10/2026 09 AM PDT           14.11           3005         0              Normal
  05/10/2026 10 AM PDT           14.11           3005         0              Normal
  05/10/2026 11 AM PDT           14.08           2970         -              Normal
  05/10/2026 12 PM PDT           14.09           2982         +              Normal
  05/10/2026 01 PM PDT           14.09           2982         0              Normal
  05/10/2026 02 PM PDT           14.09           2982         0              Normal
  05/10/2026 03 PM PDT           14.09           2982         0              Normal
  05/10/2026 04 PM PDT           14.09           2982         0              Normal
  05/10/2026 05 PM PDT           14.09           2982         0              Normal
  05/10/2026 06 PM PDT           14.11           3005         +              Normal
  05/10/2026 07 PM PDT           14.11           3005         0              Normal
  05/10/2026 08 PM PDT           14.11           3005         0              Normal
  05/10/2026 09 PM PDT           14.09           2982         -              Normal
  05/10/2026 10 PM PDT           14.09           2982         0              Normal
  05/10/2026 11 PM PDT           14.08           2970         -              Normal
  05/11/2026 12 AM PDT           14.09           2982         +              Normal
  05/11/2026 01 AM PDT           14.07           2958         -              Normal
  05/11/2026 02 AM PDT           14.07           2958         0              Normal
  05/11/2026 03 AM PDT           14.04           2924         -              Normal
  05/11/2026 04 AM PDT           14.05           2935         +              Normal
  05/11/2026 05 AM PDT           14.05           2935         0              Normal
  05/11/2026 06 AM PDT           14.03           2912         -              Normal
  05/11/2026 07 AM PDT           14.02           2901         -              Normal
  05/11/2026 08 AM PDT           14.01           2889         -              Normal
  05/11/2026 09 AM PDT           14.01           2889         0              Normal
  05/11/2026 10 AM PDT           14.01           2889         0              Normal
  05/11/2026 11 AM PDT           14.01           2889         0              Normal
  05/11/2026 12 PM PDT           14.01           2889         0              Normal
  05/11/2026 01 PM PDT           13.99           2866         -              Normal
  05/11/2026 02 PM PDT           13.99           2866         0              Normal
  05/11/2026 03 PM PDT           13.99           2866         0              Normal
  05/11/2026 04 PM PDT           14.01           2889         +              Normal
  05/11/2026 05 PM PDT           14.02           2901         +              Normal
  05/11/2026 06 PM PDT           14.03           2912         +              Normal
  05/11/2026 07 PM PDT           14.02           2901         -              Normal
  05/11/2026 08 PM PDT           14.02           2901         0              Normal
  05/11/2026 09 PM PDT           14.03           2912         +              Normal
  05/11/2026 10 PM PDT           14.01           2889         -              Normal
  05/11/2026 11 PM PDT           14.00           2878         -              Normal
  05/12/2026 12 AM PDT           14.01           2889         +              Normal
  05/12/2026 01 AM PDT           14.01           2889         0              Normal
  05/12/2026 02 AM PDT           14.02           2901         +              Normal
  05/12/2026 03 AM PDT           14.00           2878         -              Normal
  05/12/2026 04 AM PDT           14.00           2878         0              Normal
  05/12/2026 05 AM PDT           13.99           2866         -              Normal
  05/12/2026 06 AM PDT           14.00           2878         +              Normal
  05/12/2026 07 AM PDT           13.97           2843         -              Normal
  05/12/2026 08 AM PDT           13.98           2855         +              Normal
  05/12/2026 09 AM PDT           13.97           2843         -              Normal
  05/12/2026 10 AM PDT           13.96           2832         -              Normal
  05/12/2026 11 AM PDT           13.98           2855         +              Normal
  05/12/2026 12 PM PDT           13.97           2843         -              Normal
  05/12/2026 01 PM PDT           13.97           2843         0              Normal
  05/12/2026 02 PM PDT           13.97           2843         0              Normal
  05/12/2026 03 PM PDT           13.98           2855         +              Normal
  05/12/2026 04 PM PDT           13.99           2866         +              Normal
  05/12/2026 05 PM PDT           13.99           2866         0              Normal
  05/12/2026 06 PM PDT           14.00           2878         +              Normal
  05/12/2026 07 PM PDT           13.99           2866         -              Normal
  05/12/2026 08 PM PDT           14.00           2878         +              Normal
  05/12/2026 09 PM PDT           14.00           2878         0              Normal
  05/12/2026 10 PM PDT           14.01           2889         +              Normal
  05/12/2026 11 PM PDT           14.00           2878         -              Normal
  05/13/2026 12 AM PDT           13.99           2866         -              Normal
  05/13/2026 01 AM PDT           13.96           2832         -              Normal
  05/13/2026 02 AM PDT           13.95           2820         -              Normal
  05/13/2026 03 AM PDT           13.94           2809         -              Normal
  05/13/2026 04 AM PDT           13.94           2809         0              Normal
  05/13/2026 05 AM PDT           13.93           2798         -              Normal
  05/13/2026 06 AM PDT           13.92           2786         -              Normal
  05/13/2026 07 AM PDT           13.92           2786         0              Normal
  05/13/2026 08 AM PDT           13.91           2775         -              Normal
  05/13/2026 09 AM PDT           13.91           2775         0              Normal
  05/13/2026 10 AM PDT           13.90           2764         -              Normal
  05/13/2026 11 AM PDT           13.89           2753         -              Normal
  05/13/2026 12 PM PDT           13.89           2753         0              Normal
  05/13/2026 01 PM PDT           13.88           2742         -              Normal
  05/13/2026 02 PM PDT           13.89           2753         +              Normal
  05/13/2026 03 PM PDT           13.91           2775         +              Normal
  05/13/2026 04 PM PDT           13.92           2786         +              Normal
  05/13/2026 05 PM PDT           13.93           2798         +              Normal
  05/13/2026 06 PM PDT           13.92           2786         -              Normal
  05/13/2026 07 PM PDT           13.92           2786         0              Normal
  05/13/2026 08 PM PDT           13.92           2786         0              Normal
  05/13/2026 09 PM PDT           13.93           2798         +              Normal
  05/13/2026 10 PM PDT           13.91           2775         -              Normal
  05/13/2026 11 PM PDT           13.92           2786         +              Normal
  05/14/2026 12 AM PDT           13.91           2775         -              Normal
  05/14/2026 01 AM PDT           13.90           2764         -              Normal
  05/14/2026 02 AM PDT           13.90           2764         0              Normal
  05/14/2026 03 AM PDT           13.90           2764         0              Normal
  05/14/2026 04 AM PDT           13.87           2730         -              Normal
  05/14/2026 05 AM PDT           13.88           2742         +              Normal
  05/14/2026 06 AM PDT           13.87           2730         -              Normal
  05/14/2026 07 AM PDT           13.86           2719         -              Normal
  05/14/2026 08 AM PDT           13.84           2697         -              Normal
  05/14/2026 09 AM PDT           13.84           2697         0              Normal
  05/14/2026 10 AM PDT           13.84           2697         0              Normal
  05/14/2026 11 AM PDT           13.84           2697         0              Normal
  05/14/2026 12 PM PDT           13.83           2686         -              Normal
  05/14/2026 01 PM PDT           13.83           2686         0              Normal
  05/14/2026 02 PM PDT           13.83           2686         0              Normal
  05/14/2026 03 PM PDT           13.83           2686         0              Normal
  05/14/2026 04 PM PDT           13.81           2664         -              Normal
  05/14/2026 05 PM PDT           13.83           2686         +              Normal
  05/14/2026 06 PM PDT           13.80           2653         -              Normal
  05/14/2026 07 PM PDT           13.82           2675         +              Normal
  05/14/2026 08 PM PDT           13.80           2653         -              Normal
  05/14/2026 09 PM PDT           13.80           2653         0              Normal
  05/14/2026 10 PM PDT           13.79           2642         -              Normal
  05/14/2026 11 PM PDT           13.78           2631         -              Normal
  05/15/2026 12 AM PDT           13.77           2620         -              Normal
  05/15/2026 01 AM PDT           13.77           2620         0              Normal
  05/15/2026 02 AM PDT           13.77           2620         0              Normal
  05/15/2026 03 AM PDT           13.77           2620         0              Normal
  05/15/2026 04 AM PDT           13.76           2609         -              Normal
  05/15/2026 05 AM PDT           13.76           2609         0              Normal
  05/15/2026 06 AM PDT           13.75           2598         -              Normal
  05/15/2026 07 AM PDT           13.75           2598         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/15/2026 08 AM PDT           13.75           2598                        Normal
  05/15/2026 09 AM PDT           13.75           2598         0              Normal
  05/15/2026 10 AM PDT           13.75           2598         0              Normal
  05/15/2026 11 AM PDT           13.74           2587         -              Normal
  05/15/2026 12 PM PDT           13.74           2587         0              Normal
  05/15/2026 01 PM PDT           13.74           2587         0              Normal
  05/15/2026 02 PM PDT           13.74           2587         0              Normal
  05/15/2026 03 PM PDT           13.73           2576         -              Normal
  05/15/2026 04 PM PDT           13.73           2576         0              Normal
  05/15/2026 05 PM PDT           13.73           2576         0              Normal
  05/15/2026 06 PM PDT           13.73           2576         0              Normal
  05/15/2026 07 PM PDT           13.73           2576         0              Normal
  05/15/2026 08 PM PDT           13.73           2576         0              Normal
  05/15/2026 09 PM PDT           13.74           2587         +              Normal
  05/15/2026 10 PM PDT           13.74           2587         0              Normal
  05/15/2026 11 PM PDT           13.73           2576         -              Normal
  05/16/2026 12 AM PDT           13.73           2576         0              Normal
  05/16/2026 01 AM PDT           13.73           2576         0              Normal
  05/16/2026 02 AM PDT           13.73           2576         0              Normal
  05/16/2026 03 AM PDT           13.73           2576         0              Normal
  05/16/2026 04 AM PDT           13.73           2576         0              Normal
  05/16/2026 05 AM PDT           13.73           2576         0              Normal
  05/16/2026 06 AM PDT           13.73           2576         0              Normal
  05/16/2026 07 AM PDT           13.73           2576         0              Normal
  05/16/2026 08 AM PDT           13.73           2576         0              Normal
  05/16/2026 09 AM PDT           13.73           2576         0              Normal
  05/16/2026 10 AM PDT           13.73           2576         0              Normal
  05/16/2026 11 AM PDT           13.73           2576         0              Normal
  05/16/2026 12 PM PDT           13.73           2576         0              Normal
  05/16/2026 01 PM PDT           13.72           2566         -              Normal
  05/16/2026 02 PM PDT           13.72           2566         0              Normal
  05/16/2026 03 PM PDT           13.72           2566         0              Normal
  05/16/2026 04 PM PDT           13.72           2566         0              Normal
  05/16/2026 05 PM PDT           13.72           2566         0              Normal
  05/16/2026 06 PM PDT           13.72           2566         0              Normal
  05/16/2026 07 PM PDT           13.72           2566         0              Normal
  05/16/2026 08 PM PDT           13.72           2566         0              Normal
  05/16/2026 09 PM PDT           13.72           2566         0              Normal
  05/16/2026 10 PM PDT           13.72           2566         0              Normal
  05/16/2026 11 PM PDT           13.72           2566         0              Normal
  05/17/2026 12 AM PDT           13.72           2566         0              Normal
  05/17/2026 01 AM PDT           13.71           2555         -              Normal
  05/17/2026 02 AM PDT           13.71           2555         0              Normal
  05/17/2026 03 AM PDT           13.71           2555         0              Normal
  05/17/2026 04 AM PDT           13.71           2555         0              Normal
  05/17/2026 05 AM PDT           13.71           2555         0              Normal
  05/17/2026 06 AM PDT           13.71           2555         0              Normal
  05/17/2026 07 AM PDT           13.71           2555         0              Normal
  05/17/2026 08 AM PDT           13.71           2555         0              Normal
  05/17/2026 09 AM PDT           13.71           2555         0              Normal
  05/17/2026 10 AM PDT           13.71           2555         0              Normal
  05/17/2026 11 AM PDT           13.71           2555         0              Normal
  05/17/2026 12 PM PDT           13.71           2555         0              Normal
  05/17/2026 01 PM PDT           13.70           2544         -              Normal
  05/17/2026 02 PM PDT           13.70           2544         0              Normal
  05/17/2026 03 PM PDT           13.70           2544         0              Normal
  05/17/2026 04 PM PDT           13.70           2544         0              Normal
  05/17/2026 05 PM PDT           13.70           2544         0              Normal
  05/17/2026 06 PM PDT           13.70           2544         0              Normal
  05/17/2026 07 PM PDT           13.70           2544         0              Normal
  05/17/2026 08 PM PDT           13.70           2544         0              Normal
  05/17/2026 09 PM PDT           13.70           2544         0              Normal
  05/17/2026 10 PM PDT           13.70           2544         0              Normal
  05/17/2026 11 PM PDT           13.70           2544         0              Normal
  05/18/2026 12 AM PDT           13.70           2544         0              Normal
  05/18/2026 01 AM PDT           13.69           2533         -              Normal
  05/18/2026 02 AM PDT           13.69           2533         0              Normal
  05/18/2026 03 AM PDT           13.69           2533         0              Normal
  05/18/2026 04 AM PDT           13.69           2533         0              Normal
  05/18/2026 05 AM PDT           13.69           2533         0              Normal
  05/18/2026 06 AM PDT           13.69           2533         0              Normal
  05/18/2026 07 AM PDT           13.69           2533         0              Normal
  05/18/2026 08 AM PDT           13.69           2533         0              Normal
  05/18/2026 09 AM PDT           13.69           2533         0              Normal
  05/18/2026 10 AM PDT           13.69           2533         0              Normal
  05/18/2026 11 AM PDT           13.69           2533         0              Normal
  05/18/2026 12 PM PDT           13.69           2533         0              Normal
  05/18/2026 01 PM PDT           13.68           2523         -              Normal
  05/18/2026 02 PM PDT           13.68           2523         0              Normal
  05/18/2026 03 PM PDT           13.68           2523         0              Normal
  05/18/2026 04 PM PDT           13.68           2523         0              Normal
  05/18/2026 05 PM PDT           13.68           2523         0              Normal
  05/18/2026 06 PM PDT           13.68           2523         0              Normal
  05/18/2026 07 PM PDT           13.68           2523         0              Normal
  05/18/2026 08 PM PDT           13.68           2523         0              Normal
  05/18/2026 09 PM PDT           13.68           2523         0              Normal
  05/18/2026 10 PM PDT           13.68           2523         0              Normal
  05/18/2026 11 PM PDT           13.68           2523         0              Normal
  05/19/2026 12 AM PDT           13.68           2523         0              Normal
  05/19/2026 01 AM PDT           13.67           2512         -              Normal
  05/19/2026 02 AM PDT           13.67           2512         0              Normal
  05/19/2026 03 AM PDT           13.67           2512         0              Normal
  05/19/2026 04 AM PDT           13.67           2512         0              Normal
  05/19/2026 05 AM PDT           13.67           2512         0              Normal
  05/19/2026 06 AM PDT           13.67           2512         0              Normal
  05/19/2026 07 AM PDT           13.67           2512         0              Normal
  05/19/2026 08 AM PDT           13.67           2512         0              Normal
  05/19/2026 09 AM PDT           13.67           2512         0              Normal
  05/19/2026 10 AM PDT           13.67           2512         0              Normal
  05/19/2026 11 AM PDT           13.67           2512         0              Normal
  05/19/2026 12 PM PDT           13.66           2501         -              Normal
  05/19/2026 01 PM PDT           13.66           2501         0              Normal
  05/19/2026 02 PM PDT           13.66           2501         0              Normal
  05/19/2026 03 PM PDT           13.66           2501         0              Normal
  05/19/2026 04 PM PDT           13.66           2501         0              Normal
  05/19/2026 05 PM PDT           13.66           2501         0              Normal
  05/19/2026 06 PM PDT           13.66           2501         0              Normal
  05/19/2026 07 PM PDT           13.66           2501         0              Normal
  05/19/2026 08 PM PDT           13.66           2501         0              Normal
  05/19/2026 09 PM PDT           13.66           2501         0              Normal
  05/19/2026 10 PM PDT           13.66           2501         0              Normal
  05/19/2026 11 PM PDT           13.66           2501         0              Normal
  05/20/2026 12 AM PDT           13.65           2491         -              Normal
  05/20/2026 01 AM PDT           13.65           2491         0              Normal
  05/20/2026 02 AM PDT           13.65           2491         0              Normal
  05/20/2026 03 AM PDT           13.65           2491         0              Normal
  05/20/2026 04 AM PDT           13.65           2491         0              Normal
  05/20/2026 05 AM PDT           13.65           2491         0              Normal
#
# 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.