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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: | Sep 02 2026 at 7:21 AM PDT | Next Issuance: | Sep 03 2026 at 9:00 AM PDT
| |
| Action: 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: 09/02/2026 at 07:21 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 08/29/2026 at 03:00 PM PDT
# Maximum Observed Stage: 3.23 Feet
# Maximum Observed Flow: 2070 cfs
#
# Earliest Date & Time of Maximum Forecast: 09/03/2026 at 06:00 PM PDT
# Maximum Forecast Stage: 2.53 Feet
# Maximum Forecast Flow: 1493 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
08/28/2026 07 AM PDT 1.90 1062 Normal
08/28/2026 08 AM PDT 1.90 1062 0 Normal
08/28/2026 09 AM PDT 1.90 1062 0 Normal
08/28/2026 10 AM PDT 1.91 1068 + Normal
08/28/2026 11 AM PDT 1.91 1068 0 Normal
08/28/2026 12 PM PDT 1.91 1068 0 Normal
08/28/2026 01 PM PDT 1.91 1068 0 Normal
08/28/2026 02 PM PDT 1.90 1062 - Normal
08/28/2026 03 PM PDT 1.89 1055 - Normal
08/28/2026 04 PM PDT 1.90 1062 + Normal
08/28/2026 05 PM PDT 1.89 1055 - Normal
08/28/2026 06 PM PDT 1.88 1049 - Normal
08/28/2026 07 PM PDT 1.88 1049 0 Normal
08/28/2026 08 PM PDT 1.88 1049 0 Normal
08/28/2026 09 PM PDT 1.88 1049 0 Normal
08/28/2026 10 PM PDT 1.89 1055 + Normal
08/28/2026 11 PM PDT 1.89 1055 0 Normal
08/29/2026 12 AM PDT 1.89 1055 0 Normal
08/29/2026 01 AM PDT 1.89 1055 0 Normal
08/29/2026 02 AM PDT 1.89 1055 0 Normal
08/29/2026 03 AM PDT 1.89 1055 0 Normal
08/29/2026 04 AM PDT 1.89 1055 0 Normal
08/29/2026 05 AM PDT 1.93 1080 + Normal
08/29/2026 06 AM PDT 2.88 1768 + Normal
08/29/2026 07 AM PDT 3.08 1938 + Normal
08/29/2026 08 AM PDT 3.15 1999 + Normal
08/29/2026 09 AM PDT 3.18 2026 + Normal
08/29/2026 10 AM PDT 3.20 2043 + Normal
08/29/2026 11 AM PDT 3.22 2061 + Normal
08/29/2026 12 PM PDT 3.23 2070 + Normal
08/29/2026 01 PM PDT 3.23 2070 0 Normal
08/29/2026 02 PM PDT 3.23 2070 0 Normal
08/29/2026 03 PM PDT 3.23 2070 0 Normal
08/29/2026 04 PM PDT 3.22 2061 - Normal
08/29/2026 05 PM PDT 3.16 2008 - Normal
08/29/2026 06 PM PDT 3.13 1981 - Normal
08/29/2026 07 PM PDT 3.14 1990 + Normal
08/29/2026 08 PM PDT 3.17 2017 + Normal
08/29/2026 09 PM PDT 3.18 2026 + Normal
08/29/2026 10 PM PDT 3.17 2017 - Normal
08/29/2026 11 PM PDT 3.17 2017 0 Normal
08/30/2026 12 AM PDT 3.18 2026 + Normal
08/30/2026 01 AM PDT 3.17 2017 - Normal
08/30/2026 02 AM PDT 3.16 2008 - Normal
08/30/2026 03 AM PDT 3.15 1999 - Normal
08/30/2026 04 AM PDT 3.15 1999 0 Normal
08/30/2026 05 AM PDT 3.14 1990 - Normal
08/30/2026 06 AM PDT 3.11 1964 - Normal
08/30/2026 07 AM PDT 3.09 1946 - Normal
08/30/2026 08 AM PDT 3.09 1946 0 Normal
08/30/2026 09 AM PDT 3.09 1946 0 Normal
08/30/2026 10 AM PDT 3.08 1938 - Normal
08/30/2026 11 AM PDT 3.06 1920 - Normal
08/30/2026 12 PM PDT 3.02 1886 - Normal
08/30/2026 01 PM PDT 2.96 1835 - Normal
08/30/2026 02 PM PDT 2.94 1818 - Normal
08/30/2026 03 PM PDT 2.94 1818 0 Normal
08/30/2026 04 PM PDT 2.94 1818 0 Normal
08/30/2026 05 PM PDT 2.93 1810 - Normal
08/30/2026 06 PM PDT 2.92 1802 - Normal
08/30/2026 07 PM PDT 2.90 1785 - Normal
08/30/2026 08 PM PDT 2.88 1768 - Normal
08/30/2026 09 PM PDT 2.88 1768 0 Normal
08/30/2026 10 PM PDT 2.88 1768 0 Normal
08/30/2026 11 PM PDT 2.87 1760 - Normal
08/31/2026 12 AM PDT 2.85 1744 - Normal
08/31/2026 01 AM PDT 2.83 1727 - Normal
08/31/2026 02 AM PDT 2.82 1719 - Normal
08/31/2026 03 AM PDT 2.81 1711 - Normal
08/31/2026 04 AM PDT 2.81 1711 0 Normal
08/31/2026 05 AM PDT 2.80 1703 - Normal
08/31/2026 06 AM PDT 2.79 1695 - Normal
08/31/2026 07 AM PDT 2.76 1671 - Normal
08/31/2026 08 AM PDT 2.74 1655 - Normal
08/31/2026 09 AM PDT 2.74 1655 0 Normal
08/31/2026 10 AM PDT 2.73 1647 - Normal
08/31/2026 11 AM PDT 2.73 1647 0 Normal
08/31/2026 12 PM PDT 2.72 1639 - Normal
08/31/2026 01 PM PDT 2.70 1623 - Normal
08/31/2026 02 PM PDT 2.69 1616 - Normal
08/31/2026 03 PM PDT 2.67 1600 - Normal
08/31/2026 04 PM PDT 2.65 1584 - Normal
08/31/2026 05 PM PDT 2.62 1561 - Normal
08/31/2026 06 PM PDT 2.60 1546 - Normal
08/31/2026 07 PM PDT 2.59 1538 - Normal
08/31/2026 08 PM PDT 2.59 1538 0 Normal
08/31/2026 09 PM PDT 2.58 1531 - Normal
08/31/2026 10 PM PDT 2.58 1531 0 Normal
08/31/2026 11 PM PDT 2.56 1515 - Normal
09/01/2026 12 AM PDT 2.56 1515 0 Normal
09/01/2026 01 AM PDT 2.56 1515 0 Normal
09/01/2026 02 AM PDT 2.55 1508 - Normal
09/01/2026 03 AM PDT 2.55 1508 0 Normal
09/01/2026 04 AM PDT 2.55 1508 0 Normal
09/01/2026 05 AM PDT 2.55 1508 0 Normal
09/01/2026 06 AM PDT 2.54 1500 - Normal
09/01/2026 07 AM PDT 2.55 1508 + Normal
09/01/2026 08 AM PDT 2.54 1500 - Normal
09/01/2026 09 AM PDT 2.54 1500 0 Normal
09/01/2026 10 AM PDT 2.53 1493 - Normal
09/01/2026 11 AM PDT 2.53 1493 0 Normal
09/01/2026 12 PM PDT 2.54 1500 + Normal
09/01/2026 01 PM PDT 2.53 1493 - Normal
09/01/2026 02 PM PDT 2.52 1485 - Normal
09/01/2026 03 PM PDT 2.51 1478 - Normal
09/01/2026 04 PM PDT 2.49 1463 - Normal
09/01/2026 05 PM PDT 2.46 1441 - Normal
09/01/2026 06 PM PDT 2.43 1419 - Normal
09/01/2026 07 PM PDT 2.40 1397 - Normal
09/01/2026 08 PM PDT 2.39 1390 - Normal
09/01/2026 09 PM PDT 2.38 1383 - Normal
09/01/2026 10 PM PDT 2.38 1383 0 Normal
09/01/2026 11 PM PDT 2.39 1390 + Normal
09/02/2026 12 AM PDT 2.39 1390 0 Normal
09/02/2026 01 AM PDT 2.39 1390 0 Normal
09/02/2026 02 AM PDT 2.38 1383 - Normal
09/02/2026 03 AM PDT 2.37 1376 - Normal
09/02/2026 04 AM PDT 2.37 1376 0 Normal
09/02/2026 05 AM PDT 2.37 1376 0 Normal
09/02/2026 06 AM PDT 2.37 1376 0 Normal
09/02/2026 07 AM PDT 2.37 1376 0 Normal
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
09/02/2026 08 AM PDT 2.37 1376 Normal
09/02/2026 09 AM PDT 2.37 1376 0 Normal
09/02/2026 10 AM PDT 2.37 1376 0 Normal
09/02/2026 11 AM PDT 2.37 1376 0 Normal
09/02/2026 12 PM PDT 2.37 1376 0 Normal
09/02/2026 01 PM PDT 2.37 1376 0 Normal
09/02/2026 02 PM PDT 2.37 1376 0 Normal
09/02/2026 03 PM PDT 2.36 1368 - Normal
09/02/2026 04 PM PDT 2.34 1354 - Normal
09/02/2026 05 PM PDT 2.33 1347 - Normal
09/02/2026 06 PM PDT 2.31 1333 - Normal
09/02/2026 07 PM PDT 2.30 1326 - Normal
09/02/2026 08 PM PDT 2.29 1319 - Normal
09/02/2026 09 PM PDT 2.27 1305 - Normal
09/02/2026 10 PM PDT 2.27 1305 0 Normal
09/02/2026 11 PM PDT 2.27 1305 0 Normal
09/03/2026 12 AM PDT 2.27 1305 0 Normal
09/03/2026 01 AM PDT 2.28 1312 + Normal
09/03/2026 02 AM PDT 2.29 1319 + Normal
09/03/2026 03 AM PDT 2.30 1326 + Normal
09/03/2026 04 AM PDT 2.31 1333 + Normal
09/03/2026 05 AM PDT 2.32 1340 + Normal
09/03/2026 06 AM PDT 2.34 1354 + Normal
09/03/2026 07 AM PDT 2.36 1368 + Normal
09/03/2026 08 AM PDT 2.38 1383 + Normal
09/03/2026 09 AM PDT 2.40 1397 + Normal
09/03/2026 10 AM PDT 2.42 1412 + Normal
09/03/2026 11 AM PDT 2.44 1426 + Normal
09/03/2026 12 PM PDT 2.46 1441 + Normal
09/03/2026 01 PM PDT 2.47 1448 + Normal
09/03/2026 02 PM PDT 2.48 1456 + Normal
09/03/2026 03 PM PDT 2.50 1470 + Normal
09/03/2026 04 PM PDT 2.51 1478 + Normal
09/03/2026 05 PM PDT 2.52 1485 + Normal
09/03/2026 06 PM PDT 2.53 1493 + Normal
09/03/2026 07 PM PDT 2.53 1493 0 Normal
09/03/2026 08 PM PDT 2.52 1485 - Normal
09/03/2026 09 PM PDT 2.51 1478 - Normal
09/03/2026 10 PM PDT 2.50 1470 - Normal
09/03/2026 11 PM PDT 2.49 1463 - Normal
09/04/2026 12 AM PDT 2.48 1456 - Normal
09/04/2026 01 AM PDT 2.46 1441 - Normal
09/04/2026 02 AM PDT 2.45 1433 - Normal
09/04/2026 03 AM PDT 2.44 1426 - Normal
09/04/2026 04 AM PDT 2.43 1419 - Normal
09/04/2026 05 AM PDT 2.42 1412 - Normal
09/04/2026 06 AM PDT 2.40 1397 - Normal
09/04/2026 07 AM PDT 2.39 1390 - Normal
09/04/2026 08 AM PDT 2.38 1383 - Normal
09/04/2026 09 AM PDT 2.37 1376 - Normal
09/04/2026 10 AM PDT 2.37 1376 0 Normal
09/04/2026 11 AM PDT 2.35 1361 - Normal
09/04/2026 12 PM PDT 2.35 1361 0 Normal
09/04/2026 01 PM PDT 2.33 1347 - Normal
09/04/2026 02 PM PDT 2.32 1340 - Normal
09/04/2026 03 PM PDT 2.31 1333 - Normal
09/04/2026 04 PM PDT 2.30 1326 - Normal
09/04/2026 05 PM PDT 2.29 1319 - Normal
09/04/2026 06 PM PDT 2.27 1305 - Normal
09/04/2026 07 PM PDT 2.26 1298 - Normal
09/04/2026 08 PM PDT 2.25 1291 - Normal
09/04/2026 09 PM PDT 2.24 1284 - Normal
09/04/2026 10 PM PDT 2.23 1277 - Normal
09/04/2026 11 PM PDT 2.22 1270 - Normal
09/05/2026 12 AM PDT 2.21 1264 - Normal
09/05/2026 01 AM PDT 2.20 1257 - Normal
09/05/2026 02 AM PDT 2.19 1250 - Normal
09/05/2026 03 AM PDT 2.18 1243 - Normal
09/05/2026 04 AM PDT 2.17 1236 - Normal
09/05/2026 05 AM PDT 2.16 1230 - Normal
09/05/2026 06 AM PDT 2.16 1230 0 Normal
09/05/2026 07 AM PDT 2.15 1223 - Normal
09/05/2026 08 AM PDT 2.15 1223 0 Normal
09/05/2026 09 AM PDT 2.14 1216 - Normal
09/05/2026 10 AM PDT 2.13 1210 - Normal
09/05/2026 11 AM PDT 2.13 1210 0 Normal
09/05/2026 12 PM PDT 2.12 1203 - Normal
09/05/2026 01 PM PDT 2.12 1203 0 Normal
09/05/2026 02 PM PDT 2.12 1203 0 Normal
09/05/2026 03 PM PDT 2.11 1196 - Normal
09/05/2026 04 PM PDT 2.11 1196 0 Normal
09/05/2026 05 PM PDT 2.11 1196 0 Normal
09/05/2026 06 PM PDT 2.10 1190 - Normal
09/05/2026 07 PM PDT 2.10 1190 0 Normal
09/05/2026 08 PM PDT 2.10 1190 0 Normal
09/05/2026 09 PM PDT 2.10 1190 0 Normal
09/05/2026 10 PM PDT 2.10 1190 0 Normal
09/05/2026 11 PM PDT 2.09 1183 - Normal
09/06/2026 12 AM PDT 2.09 1183 0 Normal
09/06/2026 01 AM PDT 2.09 1183 0 Normal
09/06/2026 02 AM PDT 2.09 1183 0 Normal
09/06/2026 03 AM PDT 2.09 1183 0 Normal
09/06/2026 04 AM PDT 2.09 1183 0 Normal
09/06/2026 05 AM PDT 2.09 1183 0 Normal
09/06/2026 06 AM PDT 2.09 1183 0 Normal
09/06/2026 07 AM PDT 2.09 1183 0 Normal
09/06/2026 08 AM PDT 2.09 1183 0 Normal
09/06/2026 09 AM PDT 2.09 1183 0 Normal
09/06/2026 10 AM PDT 2.09 1183 0 Normal
09/06/2026 11 AM PDT 2.09 1183 0 Normal
09/06/2026 12 PM PDT 2.10 1190 + Normal
09/06/2026 01 PM PDT 2.10 1190 0 Normal
09/06/2026 02 PM PDT 2.10 1190 0 Normal
09/06/2026 03 PM PDT 2.10 1190 0 Normal
09/06/2026 04 PM PDT 2.11 1196 + Normal
09/06/2026 05 PM PDT 2.11 1196 0 Normal
09/06/2026 06 PM PDT 2.11 1196 0 Normal
09/06/2026 07 PM PDT 2.12 1203 + Normal
09/06/2026 08 PM PDT 2.12 1203 0 Normal
09/06/2026 09 PM PDT 2.12 1203 0 Normal
09/06/2026 10 PM PDT 2.12 1203 0 Normal
09/06/2026 11 PM PDT 2.13 1210 + Normal
09/07/2026 12 AM PDT 2.13 1210 0 Normal
09/07/2026 01 AM PDT 2.13 1210 0 Normal
09/07/2026 02 AM PDT 2.14 1216 + Normal
09/07/2026 03 AM PDT 2.14 1216 0 Normal
09/07/2026 04 AM PDT 2.15 1223 + Normal
09/07/2026 05 AM PDT 2.16 1230 + 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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