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 - IRON GATE (IRGC1)
Latitude: 41.93º NLongitude: 122.44º WElevation: 2162 FeetForecast Type: Unofficial Location
Location: Siskiyou County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Aug 28 2026 at 9:24 AM PDTNext Issuance: Aug 29 2026 at 9:00 AM PDT
Action/Monitor: N/A Minor Flood: N/A Moderate Flood: N/A Major Flood: N/A


# Tabular Observed and Forecast Hydrograph Information
#
# Location: Klamath River - Iron Gate (IRGC1)
#
# File Generation Time:  08/28/2026 at 09:26 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  08/28/2026 at 09:00 AM PDT
# Maximum Observed Stage:                       1.84 Feet
# Maximum Observed Flow:                        954 cfs
#
# Earliest Date & Time of Maximum Forecast:     09/01/2026 at 10:00 PM PDT
# Maximum Forecast Stage:                       3.31 Feet
# Maximum Forecast Flow:                        1981 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  08/23/2026 09 AM PDT            1.72            890                Not Applicable
  08/23/2026 10 AM PDT            1.72            890         0      Not Applicable
  08/23/2026 11 AM PDT            1.73            895         +      Not Applicable
  08/23/2026 12 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 01 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 02 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 03 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 04 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 05 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 06 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 07 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 08 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 09 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 10 PM PDT            1.73            895         0      Not Applicable
  08/23/2026 11 PM PDT            1.71            885         -      Not Applicable
  08/24/2026 12 AM PDT            1.71            885         0      Not Applicable
  08/24/2026 01 AM PDT            1.71            885         0      Not Applicable
  08/24/2026 02 AM PDT            1.72            890         +      Not Applicable
  08/24/2026 03 AM PDT            1.72            890         0      Not Applicable
  08/24/2026 04 AM PDT            1.71            885         -      Not Applicable
  08/24/2026 05 AM PDT            1.72            890         +      Not Applicable
  08/24/2026 06 AM PDT            1.72            890         0      Not Applicable
  08/24/2026 07 AM PDT            1.73            895         +      Not Applicable
  08/24/2026 08 AM PDT            1.74            901         +      Not Applicable
  08/24/2026 09 AM PDT            1.73            895         -      Not Applicable
  08/24/2026 10 AM PDT            1.72            890         -      Not Applicable
  08/24/2026 11 AM PDT            1.73            895         +      Not Applicable
  08/24/2026 12 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 01 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 02 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 03 PM PDT            1.72            890         -      Not Applicable
  08/24/2026 04 PM PDT            1.73            895         +      Not Applicable
  08/24/2026 05 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 06 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 07 PM PDT            1.73            895         0      Not Applicable
  08/24/2026 08 PM PDT            1.72            890         -      Not Applicable
  08/24/2026 09 PM PDT            1.71            885         -      Not Applicable
  08/24/2026 10 PM PDT            1.73            895         +      Not Applicable
  08/24/2026 11 PM PDT            1.71            885         -      Not Applicable
  08/25/2026 12 AM PDT            1.70            880         -      Not Applicable
  08/25/2026 01 AM PDT            1.72            890         +      Not Applicable
  08/25/2026 02 AM PDT            1.72            890         0      Not Applicable
  08/25/2026 03 AM PDT            1.72            890         0      Not Applicable
  08/25/2026 04 AM PDT            1.72            890         0      Not Applicable
  08/25/2026 05 AM PDT            1.71            885         -      Not Applicable
  08/25/2026 06 AM PDT            1.72            890         +      Not Applicable
  08/25/2026 07 AM PDT            1.72            890         0      Not Applicable
  08/25/2026 08 AM PDT            1.72            890         0      Not Applicable
  08/25/2026 09 AM PDT            1.73            895         +      Not Applicable
  08/25/2026 10 AM PDT            1.73            895         0      Not Applicable
  08/25/2026 11 AM PDT            1.73            895         0      Not Applicable
  08/25/2026 12 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 01 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 02 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 03 PM PDT            1.72            890         -      Not Applicable
  08/25/2026 04 PM PDT            1.73            895         +      Not Applicable
  08/25/2026 05 PM PDT            1.72            890         -      Not Applicable
  08/25/2026 06 PM PDT            1.73            895         +      Not Applicable
  08/25/2026 07 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 08 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 09 PM PDT            1.73            895         0      Not Applicable
  08/25/2026 10 PM PDT            1.76            911         +      Not Applicable
  08/25/2026 11 PM PDT            1.78            922         +      Not Applicable
  08/26/2026 12 AM PDT            1.78            922         0      Not Applicable
  08/26/2026 01 AM PDT            1.78            922         0      Not Applicable
  08/26/2026 02 AM PDT            1.79            927         +      Not Applicable
  08/26/2026 03 AM PDT            1.80            933         +      Not Applicable
  08/26/2026 04 AM PDT            1.79            927         -      Not Applicable
  08/26/2026 05 AM PDT            1.79            927         0      Not Applicable
  08/26/2026 06 AM PDT            1.78            922         -      Not Applicable
  08/26/2026 07 AM PDT            1.78            922         0      Not Applicable
  08/26/2026 08 AM PDT            1.77            917         -      Not Applicable
  08/26/2026 09 AM PDT            1.78            922         +      Not Applicable
  08/26/2026 10 AM PDT            1.77            917         -      Not Applicable
  08/26/2026 11 AM PDT            1.78            922         +      Not Applicable
  08/26/2026 12 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 01 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 02 PM PDT            1.77            917         -      Not Applicable
  08/26/2026 03 PM PDT            1.78            922         +      Not Applicable
  08/26/2026 04 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 05 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 06 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 07 PM PDT            1.78            922         0      Not Applicable
  08/26/2026 08 PM PDT            1.77            917         -      Not Applicable
  08/26/2026 09 PM PDT            1.76            911         -      Not Applicable
  08/26/2026 10 PM PDT            1.76            911         0      Not Applicable
  08/26/2026 11 PM PDT            1.75            906         -      Not Applicable
  08/27/2026 12 AM PDT            1.75            906         0      Not Applicable
  08/27/2026 01 AM PDT            1.75            906         0      Not Applicable
  08/27/2026 02 AM PDT            1.76            911         +      Not Applicable
  08/27/2026 03 AM PDT            1.76            911         0      Not Applicable
  08/27/2026 04 AM PDT            1.76            911         0      Not Applicable
  08/27/2026 05 AM PDT            1.77            917         +      Not Applicable
  08/27/2026 06 AM PDT            1.77            917         0      Not Applicable
  08/27/2026 07 AM PDT            1.75            906         -      Not Applicable
  08/27/2026 08 AM PDT            1.76            911         +      Not Applicable
  08/27/2026 09 AM PDT            1.76            911         0      Not Applicable
  08/27/2026 10 AM PDT            1.76            911         0      Not Applicable
  08/27/2026 11 AM PDT            1.77            917         +      Not Applicable
  08/27/2026 12 PM PDT            1.76            911         -      Not Applicable
  08/27/2026 01 PM PDT            1.77            917         +      Not Applicable
  08/27/2026 02 PM PDT            1.77            917         0      Not Applicable
  08/27/2026 03 PM PDT            1.77            917         0      Not Applicable
  08/27/2026 04 PM PDT            1.78            922         +      Not Applicable
  08/27/2026 05 PM PDT            1.77            917         -      Not Applicable
  08/27/2026 06 PM PDT            1.77            917         0      Not Applicable
  08/27/2026 07 PM PDT            1.76            911         -      Not Applicable
  08/27/2026 08 PM PDT            1.76            911         0      Not Applicable
  08/27/2026 09 PM PDT            1.76            911         0      Not Applicable
  08/27/2026 10 PM PDT            1.75            906         -      Not Applicable
  08/27/2026 11 PM PDT            1.75            906         0      Not Applicable
  08/28/2026 12 AM PDT            1.75            906         0      Not Applicable
  08/28/2026 01 AM PDT            1.75            906         0      Not Applicable
  08/28/2026 02 AM PDT            1.75            906         0      Not Applicable
  08/28/2026 03 AM PDT            1.75            906         0      Not Applicable
  08/28/2026 04 AM PDT            1.76            911         +      Not Applicable
  08/28/2026 05 AM PDT            1.76            911         0      Not Applicable
  08/28/2026 06 AM PDT            1.77            917         +      Not Applicable
  08/28/2026 07 AM PDT            1.77            917         0      Not Applicable
  08/28/2026 08 AM PDT            1.77            917         0      Not Applicable
  08/28/2026 09 AM PDT            1.84            954         +      Not Applicable
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  08/28/2026 10 AM PDT            1.95           1015                Not Applicable
  08/28/2026 11 AM PDT            2.08           1089         +      Not Applicable
  08/28/2026 12 PM PDT            2.20           1164         +      Not Applicable
  08/28/2026 01 PM PDT            2.31           1235         +      Not Applicable
  08/28/2026 02 PM PDT            2.42           1309         +      Not Applicable
  08/28/2026 03 PM PDT            2.51           1370         +      Not Applicable
  08/28/2026 04 PM PDT            2.60           1433         +      Not Applicable
  08/28/2026 05 PM PDT            2.68           1491         +      Not Applicable
  08/28/2026 06 PM PDT            2.76           1549         +      Not Applicable
  08/28/2026 07 PM PDT            2.84           1609         +      Not Applicable
  08/28/2026 08 PM PDT            2.90           1654         +      Not Applicable
  08/28/2026 09 PM PDT            2.95           1692         +      Not Applicable
  08/28/2026 10 PM PDT            3.00           1731         +      Not Applicable
  08/28/2026 11 PM PDT            3.04           1762         +      Not Applicable
  08/29/2026 12 AM PDT            3.08           1794         +      Not Applicable
  08/29/2026 01 AM PDT            3.10           1810         +      Not Applicable
  08/29/2026 02 AM PDT            3.13           1834         +      Not Applicable
  08/29/2026 03 AM PDT            3.15           1850         +      Not Applicable
  08/29/2026 04 AM PDT            3.17           1866         +      Not Applicable
  08/29/2026 05 AM PDT            3.19           1882         +      Not Applicable
  08/29/2026 06 AM PDT            3.20           1891         +      Not Applicable
  08/29/2026 07 AM PDT            3.22           1907         +      Not Applicable
  08/29/2026 08 AM PDT            3.23           1915         +      Not Applicable
  08/29/2026 09 AM PDT            3.24           1923         +      Not Applicable
  08/29/2026 10 AM PDT            3.25           1932         +      Not Applicable
  08/29/2026 11 AM PDT            3.25           1932         0      Not Applicable
  08/29/2026 12 PM PDT            3.26           1940         +      Not Applicable
  08/29/2026 01 PM PDT            3.26           1940         0      Not Applicable
  08/29/2026 02 PM PDT            3.27           1948         +      Not Applicable
  08/29/2026 03 PM PDT            3.27           1948         0      Not Applicable
  08/29/2026 04 PM PDT            3.27           1948         0      Not Applicable
  08/29/2026 05 PM PDT            3.28           1956         +      Not Applicable
  08/29/2026 06 PM PDT            3.28           1956         0      Not Applicable
  08/29/2026 07 PM PDT            3.28           1956         0      Not Applicable
  08/29/2026 08 PM PDT            3.29           1965         +      Not Applicable
  08/29/2026 09 PM PDT            3.29           1965         0      Not Applicable
  08/29/2026 10 PM PDT            3.29           1965         0      Not Applicable
  08/29/2026 11 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 12 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 01 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 02 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 03 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 04 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 05 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 06 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 07 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 08 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 09 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 10 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 11 AM PDT            3.29           1965         0      Not Applicable
  08/30/2026 12 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 01 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 02 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 03 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 04 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 05 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 06 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 07 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 08 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 09 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 10 PM PDT            3.29           1965         0      Not Applicable
  08/30/2026 11 PM PDT            3.29           1965         0      Not Applicable
  08/31/2026 12 AM PDT            3.29           1965         0      Not Applicable
  08/31/2026 01 AM PDT            3.30           1973         +      Not Applicable
  08/31/2026 02 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 03 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 04 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 05 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 06 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 07 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 08 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 09 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 10 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 11 AM PDT            3.30           1973         0      Not Applicable
  08/31/2026 12 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 01 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 02 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 03 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 04 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 05 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 06 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 07 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 08 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 09 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 10 PM PDT            3.30           1973         0      Not Applicable
  08/31/2026 11 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 12 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 01 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 02 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 03 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 04 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 05 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 06 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 07 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 08 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 09 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 10 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 11 AM PDT            3.30           1973         0      Not Applicable
  09/01/2026 12 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 01 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 02 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 03 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 04 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 05 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 06 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 07 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 08 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 09 PM PDT            3.30           1973         0      Not Applicable
  09/01/2026 10 PM PDT            3.31           1981         +      Not Applicable
  09/01/2026 11 PM PDT            3.31           1981         0      Not Applicable
  09/02/2026 12 AM PDT            3.31           1981         0      Not Applicable
  09/02/2026 01 AM PDT            3.31           1981         0      Not Applicable
  09/02/2026 02 AM PDT            3.31           1981         0      Not Applicable
  09/02/2026 03 AM PDT            3.31           1981         0      Not Applicable
  09/02/2026 04 AM PDT            3.31           1981         0      Not Applicable
  09/02/2026 05 AM PDT            3.31           1981         0      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.