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

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KLAMATH RIVER - SEIAD VALLEY (SEIC1)
Latitude: 41.85º NLongitude: 123.23º WElevation: 1320 FeetForecast Type: Official Location
Location: Siskiyou County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Mar 18 2026 at 12:50 PM PDTNext Issuance: Mar 19 2026 at 9:00 AM PDT
Action/Monitor: 13.0 FeetMinor Flood: 15.0 FeetModerate Flood: 20.0 FeetMajor Flood: 28.0 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Klamath River - Seiad Valley (SEIC1)
#
# File Generation Time:  03/18/2026 at 12:50 PM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  03/13/2026 at 05:00 PM PDT
# Maximum Observed Stage:                       4.00 Feet
# Maximum Observed Flow:                        2830 cfs
#
# Earliest Date & Time of Maximum Forecast:     03/18/2026 at 01:00 PM PDT
# Maximum Forecast Stage:                       3.74 Feet
# Maximum Forecast Flow:                        2559 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  03/13/2026 12 PM PDT            3.98           2809                        Normal
  03/13/2026 01 PM PDT            3.98           2809         0              Normal
  03/13/2026 02 PM PDT            3.99           2820         +              Normal
  03/13/2026 03 PM PDT            3.99           2820         0              Normal
  03/13/2026 04 PM PDT            3.99           2820         0              Normal
  03/13/2026 05 PM PDT            4.00           2830         +              Normal
  03/13/2026 06 PM PDT            3.98           2809         -              Normal
  03/13/2026 07 PM PDT            3.97           2798         -              Normal
  03/13/2026 08 PM PDT            3.97           2798         0              Normal
  03/13/2026 09 PM PDT            3.97           2798         0              Normal
  03/13/2026 10 PM PDT            3.96           2788         -              Normal
  03/13/2026 11 PM PDT            3.96           2788         0              Normal
  03/14/2026 12 AM PDT            3.96           2788         0              Normal
  03/14/2026 01 AM PDT            3.96           2788         0              Normal
  03/14/2026 02 AM PDT            3.95           2777         -              Normal
  03/14/2026 03 AM PDT            3.95           2777         0              Normal
  03/14/2026 04 AM PDT            3.95           2777         0              Normal
  03/14/2026 05 AM PDT            3.95           2777         0              Normal
  03/14/2026 06 AM PDT            3.95           2777         0              Normal
  03/14/2026 07 AM PDT            3.95           2777         0              Normal
  03/14/2026 08 AM PDT            3.95           2777         0              Normal
  03/14/2026 09 AM PDT            3.95           2777         0              Normal
  03/14/2026 10 AM PDT            3.95           2777         0              Normal
  03/14/2026 11 AM PDT            3.95           2777         0              Normal
  03/14/2026 12 PM PDT            3.94           2766         -              Normal
  03/14/2026 01 PM PDT            3.94           2766         0              Normal
  03/14/2026 02 PM PDT            3.95           2777         +              Normal
  03/14/2026 03 PM PDT            3.94           2766         -              Normal
  03/14/2026 04 PM PDT            3.95           2777         +              Normal
  03/14/2026 05 PM PDT            3.96           2788         +              Normal
  03/14/2026 06 PM PDT            3.94           2766         -              Normal
  03/14/2026 07 PM PDT            3.94           2766         0              Normal
  03/14/2026 08 PM PDT            3.93           2756         -              Normal
  03/14/2026 09 PM PDT            3.93           2756         0              Normal
  03/14/2026 10 PM PDT            3.92           2745         -              Normal
  03/14/2026 11 PM PDT            3.92           2745         0              Normal
  03/15/2026 12 AM PDT            3.92           2745         0              Normal
  03/15/2026 01 AM PDT            3.92           2745         0              Normal
  03/15/2026 02 AM PDT            3.91           2735         -              Normal
  03/15/2026 03 AM PDT            3.92           2745         +              Normal
  03/15/2026 04 AM PDT            3.90           2724         -              Normal
  03/15/2026 05 AM PDT            3.90           2724         0              Normal
  03/15/2026 06 AM PDT            3.90           2724         0              Normal
  03/15/2026 07 AM PDT            3.89           2714         -              Normal
  03/15/2026 08 AM PDT            3.90           2724         +              Normal
  03/15/2026 09 AM PDT            3.89           2714         -              Normal
  03/15/2026 10 AM PDT            3.89           2714         0              Normal
  03/15/2026 11 AM PDT            3.88           2703         -              Normal
  03/15/2026 12 PM PDT            3.89           2714         +              Normal
  03/15/2026 01 PM PDT            3.89           2714         0              Normal
  03/15/2026 02 PM PDT            3.89           2714         0              Normal
  03/15/2026 03 PM PDT            3.88           2703         -              Normal
  03/15/2026 04 PM PDT            3.90           2724         +              Normal
  03/15/2026 05 PM PDT            3.89           2714         -              Normal
  03/15/2026 06 PM PDT            3.89           2714         0              Normal
  03/15/2026 07 PM PDT            3.88           2703         -              Normal
  03/15/2026 08 PM PDT            3.87           2693         -              Normal
  03/15/2026 09 PM PDT            3.87           2693         0              Normal
  03/15/2026 10 PM PDT            3.87           2693         0              Normal
  03/15/2026 11 PM PDT            3.87           2693         0              Normal
  03/16/2026 12 AM PDT            3.87           2693         0              Normal
  03/16/2026 01 AM PDT            3.86           2682         -              Normal
  03/16/2026 02 AM PDT            3.85           2672         -              Normal
  03/16/2026 03 AM PDT            3.84           2661         -              Normal
  03/16/2026 04 AM PDT            3.85           2672         +              Normal
  03/16/2026 05 AM PDT            3.84           2661         -              Normal
  03/16/2026 06 AM PDT            3.84           2661         0              Normal
  03/16/2026 07 AM PDT            3.84           2661         0              Normal
  03/16/2026 08 AM PDT            3.84           2661         0              Normal
  03/16/2026 09 AM PDT            3.84           2661         0              Normal
  03/16/2026 10 AM PDT            3.83           2651         -              Normal
  03/16/2026 11 AM PDT            3.83           2651         0              Normal
  03/16/2026 12 PM PDT            3.83           2651         0              Normal
  03/16/2026 01 PM PDT            3.84           2661         +              Normal
  03/16/2026 02 PM PDT            3.84           2661         0              Normal
  03/16/2026 03 PM PDT            3.83           2651         -              Normal
  03/16/2026 04 PM PDT            3.85           2672         +              Normal
  03/16/2026 05 PM PDT            3.84           2661         -              Normal
  03/16/2026 06 PM PDT            3.84           2661         0              Normal
  03/16/2026 07 PM PDT            3.83           2651         -              Normal
  03/16/2026 08 PM PDT            3.82           2641         -              Normal
  03/16/2026 09 PM PDT            3.82           2641         0              Normal
  03/16/2026 10 PM PDT            3.81           2630         -              Normal
  03/16/2026 11 PM PDT            3.81           2630         0              Normal
  03/17/2026 12 AM PDT            3.80           2620         -              Normal
  03/17/2026 01 AM PDT            3.80           2620         0              Normal
  03/17/2026 02 AM PDT            3.80           2620         0              Normal
  03/17/2026 03 AM PDT            3.80           2620         0              Normal
  03/17/2026 04 AM PDT            3.80           2620         0              Normal
  03/17/2026 05 AM PDT            3.80           2620         0              Normal
  03/17/2026 06 AM PDT            3.79           2610         -              Normal
  03/17/2026 07 AM PDT            3.79           2610         0              Normal
  03/17/2026 08 AM PDT            3.79           2610         0              Normal
  03/17/2026 09 AM PDT            3.79           2610         0              Normal
  03/17/2026 10 AM PDT            3.79           2610         0              Normal
  03/17/2026 11 AM PDT            3.79           2610         0              Normal
  03/17/2026 12 PM PDT            3.79           2610         0              Normal
  03/17/2026 01 PM PDT            3.79           2610         0              Normal
  03/17/2026 02 PM PDT            3.79           2610         0              Normal
  03/17/2026 03 PM PDT            3.78           2600         -              Normal
  03/17/2026 04 PM PDT            3.80           2620         +              Normal
  03/17/2026 05 PM PDT            3.80           2620         0              Normal
  03/17/2026 06 PM PDT            3.79           2610         -              Normal
  03/17/2026 07 PM PDT            3.78           2600         -              Normal
  03/17/2026 08 PM PDT            3.77           2589         -              Normal
  03/17/2026 09 PM PDT            3.77           2589         0              Normal
  03/17/2026 10 PM PDT            3.77           2589         0              Normal
  03/17/2026 11 PM PDT            3.76           2579         -              Normal
  03/18/2026 12 AM PDT            3.76           2579         0              Normal
  03/18/2026 01 AM PDT            3.77           2589         +              Normal
  03/18/2026 02 AM PDT            3.76           2579         -              Normal
  03/18/2026 03 AM PDT            3.76           2579         0              Normal
  03/18/2026 04 AM PDT            3.76           2579         0              Normal
  03/18/2026 05 AM PDT            3.75           2569         -              Normal
  03/18/2026 06 AM PDT            3.76           2579         +              Normal
  03/18/2026 07 AM PDT            3.75           2569         -              Normal
  03/18/2026 08 AM PDT            3.76           2579         +              Normal
  03/18/2026 09 AM PDT            3.75           2569         -              Normal
  03/18/2026 10 AM PDT            3.75           2569         0              Normal
  03/18/2026 11 AM PDT            3.75           2569         0              Normal
  03/18/2026 12 PM PDT            3.74           2559         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  03/18/2026 01 PM PDT            3.74           2559                        Normal
  03/18/2026 02 PM PDT            3.74           2559         0              Normal
  03/18/2026 03 PM PDT            3.74           2559         0              Normal
  03/18/2026 04 PM PDT            3.73           2549         -              Normal
  03/18/2026 05 PM PDT            3.73           2549         0              Normal
  03/18/2026 06 PM PDT            3.73           2549         0              Normal
  03/18/2026 07 PM PDT            3.73           2549         0              Normal
  03/18/2026 08 PM PDT            3.73           2549         0              Normal
  03/18/2026 09 PM PDT            3.73           2549         0              Normal
  03/18/2026 10 PM PDT            3.73           2549         0              Normal
  03/18/2026 11 PM PDT            3.73           2549         0              Normal
  03/19/2026 12 AM PDT            3.73           2549         0              Normal
  03/19/2026 01 AM PDT            3.73           2549         0              Normal
  03/19/2026 02 AM PDT            3.73           2549         0              Normal
  03/19/2026 03 AM PDT            3.73           2549         0              Normal
  03/19/2026 04 AM PDT            3.73           2549         0              Normal
  03/19/2026 05 AM PDT            3.73           2549         0              Normal
  03/19/2026 06 AM PDT            3.73           2549         0              Normal
  03/19/2026 07 AM PDT            3.73           2549         0              Normal
  03/19/2026 08 AM PDT            3.73           2549         0              Normal
  03/19/2026 09 AM PDT            3.73           2549         0              Normal
  03/19/2026 10 AM PDT            3.73           2549         0              Normal
  03/19/2026 11 AM PDT            3.73           2549         0              Normal
  03/19/2026 12 PM PDT            3.73           2549         0              Normal
  03/19/2026 01 PM PDT            3.73           2549         0              Normal
  03/19/2026 02 PM PDT            3.73           2549         0              Normal
  03/19/2026 03 PM PDT            3.73           2549         0              Normal
  03/19/2026 04 PM PDT            3.73           2549         0              Normal
  03/19/2026 05 PM PDT            3.73           2549         0              Normal
  03/19/2026 06 PM PDT            3.72           2539         -              Normal
  03/19/2026 07 PM PDT            3.72           2539         0              Normal
  03/19/2026 08 PM PDT            3.72           2539         0              Normal
  03/19/2026 09 PM PDT            3.72           2539         0              Normal
  03/19/2026 10 PM PDT            3.72           2539         0              Normal
  03/19/2026 11 PM PDT            3.72           2539         0              Normal
  03/20/2026 12 AM PDT            3.72           2539         0              Normal
  03/20/2026 01 AM PDT            3.72           2539         0              Normal
  03/20/2026 02 AM PDT            3.72           2539         0              Normal
  03/20/2026 03 AM PDT            3.72           2539         0              Normal
  03/20/2026 04 AM PDT            3.72           2539         0              Normal
  03/20/2026 05 AM PDT            3.72           2539         0              Normal
  03/20/2026 06 AM PDT            3.72           2539         0              Normal
  03/20/2026 07 AM PDT            3.72           2539         0              Normal
  03/20/2026 08 AM PDT            3.71           2528         -              Normal
  03/20/2026 09 AM PDT            3.71           2528         0              Normal
  03/20/2026 10 AM PDT            3.71           2528         0              Normal
  03/20/2026 11 AM PDT            3.71           2528         0              Normal
  03/20/2026 12 PM PDT            3.71           2528         0              Normal
  03/20/2026 01 PM PDT            3.70           2518         -              Normal
  03/20/2026 02 PM PDT            3.70           2518         0              Normal
  03/20/2026 03 PM PDT            3.70           2518         0              Normal
  03/20/2026 04 PM PDT            3.69           2508         -              Normal
  03/20/2026 05 PM PDT            3.69           2508         0              Normal
  03/20/2026 06 PM PDT            3.69           2508         0              Normal
  03/20/2026 07 PM PDT            3.69           2508         0              Normal
  03/20/2026 08 PM PDT            3.68           2498         -              Normal
  03/20/2026 09 PM PDT            3.68           2498         0              Normal
  03/20/2026 10 PM PDT            3.68           2498         0              Normal
  03/20/2026 11 PM PDT            3.67           2488         -              Normal
  03/21/2026 12 AM PDT            3.67           2488         0              Normal
  03/21/2026 01 AM PDT            3.67           2488         0              Normal
  03/21/2026 02 AM PDT            3.67           2488         0              Normal
  03/21/2026 03 AM PDT            3.66           2478         -              Normal
  03/21/2026 04 AM PDT            3.66           2478         0              Normal
  03/21/2026 05 AM PDT            3.66           2478         0              Normal
  03/21/2026 06 AM PDT            3.65           2468         -              Normal
  03/21/2026 07 AM PDT            3.65           2468         0              Normal
  03/21/2026 08 AM PDT            3.64           2458         -              Normal
  03/21/2026 09 AM PDT            3.64           2458         0              Normal
  03/21/2026 10 AM PDT            3.63           2449         -              Normal
  03/21/2026 11 AM PDT            3.63           2449         0              Normal
  03/21/2026 12 PM PDT            3.62           2439         -              Normal
  03/21/2026 01 PM PDT            3.62           2439         0              Normal
  03/21/2026 02 PM PDT            3.61           2429         -              Normal
  03/21/2026 03 PM PDT            3.61           2429         0              Normal
  03/21/2026 04 PM PDT            3.60           2419         -              Normal
  03/21/2026 05 PM PDT            3.60           2419         0              Normal
  03/21/2026 06 PM PDT            3.59           2409         -              Normal
  03/21/2026 07 PM PDT            3.58           2399         -              Normal
  03/21/2026 08 PM PDT            3.58           2399         0              Normal
  03/21/2026 09 PM PDT            3.57           2390         -              Normal
  03/21/2026 10 PM PDT            3.57           2390         0              Normal
  03/21/2026 11 PM PDT            3.56           2380         -              Normal
  03/22/2026 12 AM PDT            3.56           2380         0              Normal
  03/22/2026 01 AM PDT            3.56           2380         0              Normal
  03/22/2026 02 AM PDT            3.55           2370         -              Normal
  03/22/2026 03 AM PDT            3.54           2360         -              Normal
  03/22/2026 04 AM PDT            3.54           2360         0              Normal
  03/22/2026 05 AM PDT            3.54           2360         0              Normal
  03/22/2026 06 AM PDT            3.53           2351         -              Normal
  03/22/2026 07 AM PDT            3.52           2341         -              Normal
  03/22/2026 08 AM PDT            3.52           2341         0              Normal
  03/22/2026 09 AM PDT            3.51           2331         -              Normal
  03/22/2026 10 AM PDT            3.51           2331         0              Normal
  03/22/2026 11 AM PDT            3.50           2322         -              Normal
  03/22/2026 12 PM PDT            3.50           2322         0              Normal
  03/22/2026 01 PM PDT            3.49           2312         -              Normal
  03/22/2026 02 PM PDT            3.49           2312         0              Normal
  03/22/2026 03 PM PDT            3.48           2303         -              Normal
  03/22/2026 04 PM PDT            3.48           2303         0              Normal
  03/22/2026 05 PM PDT            3.48           2303         0              Normal
  03/22/2026 06 PM PDT            3.47           2293         -              Normal
  03/22/2026 07 PM PDT            3.47           2293         0              Normal
  03/22/2026 08 PM PDT            3.47           2293         0              Normal
  03/22/2026 09 PM PDT            3.47           2293         0              Normal
  03/22/2026 10 PM PDT            3.47           2293         0              Normal
  03/22/2026 11 PM PDT            3.47           2293         0              Normal
  03/23/2026 12 AM PDT            3.47           2293         0              Normal
  03/23/2026 01 AM PDT            3.47           2293         0              Normal
  03/23/2026 02 AM PDT            3.47           2293         0              Normal
  03/23/2026 03 AM PDT            3.47           2293         0              Normal
  03/23/2026 04 AM PDT            3.47           2293         0              Normal
  03/23/2026 05 AM PDT            3.47           2293         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.