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KLAMATH RIVER - SEIAD VALLEY (SEIC1)
| Latitude: 41.85º N | Longitude: 123.23º W | Elevation: 1320 Feet | | Forecast Type: Official Location |
| Location: Siskiyou County in California | Bulletin Group: North Coast | River Group: Klamath |
| Issuance Time: | Mar 18 2026 at 12:50 PM PDT | Next Issuance: | Mar 19 2026 at 9:00 AM PDT
| |
| Action/Monitor: 13.0 Feet | Minor Flood: 15.0 Feet | Moderate Flood: 20.0 Feet | Major 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.
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