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

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WEST WALKER RIVER - BELOW LITTLE WALKER RIVER NEAR COLEVILLE (WWBC1)
Latitude: 38.38º NLongitude: 119.45º WElevation: 6591 FeetForecast Type: Official Location
Location: Mono County in CaliforniaBulletin Group: Eastern SierraRiver Group: Eastern Sierra
Issuance Time: May 10 2026 at 6:54 AM PDTNext Issuance: May 11 2026 at 9:00 AM PDT
Action/Monitor: 5.5 FeetMinor Flood: 6.0 FeetModerate Flood: 6.8 FeetMajor Flood: 7.3 Feet


# Tabular Observed and Forecast Hydrograph Information
#
# Location: West Walker River - Blo Ltl Walker Nr Coleville (WWBC1)
#
# File Generation Time:  05/10/2026 at 06:54 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  05/10/2026 at 05:00 AM PDT
# Maximum Observed Stage:                       3.58 Feet
# Maximum Observed Flow:                        843 cfs
#
# Earliest Date & Time of Maximum Forecast:     05/14/2026 at 02:00 AM PDT
# Maximum Forecast Stage:                       4.42 Feet
# Maximum Forecast Flow:                        1331 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  05/05/2026 06 AM PDT            2.66            449                        Normal
  05/05/2026 07 AM PDT            2.65            445         -              Normal
  05/05/2026 08 AM PDT            2.65            445         0              Normal
  05/05/2026 09 AM PDT            2.65            445         0              Normal
  05/05/2026 10 AM PDT            2.64            441         -              Normal
  05/05/2026 11 AM PDT            2.64            441         0              Normal
  05/05/2026 12 PM PDT            2.64            441         0              Normal
  05/05/2026 01 PM PDT            2.63            438         -              Normal
  05/05/2026 02 PM PDT            2.62            434         -              Normal
  05/05/2026 03 PM PDT            2.62            434         0              Normal
  05/05/2026 04 PM PDT            2.62            434         0              Normal
  05/05/2026 05 PM PDT            2.61            430         -              Normal
  05/05/2026 06 PM PDT            2.61            430         0              Normal
  05/05/2026 07 PM PDT            2.60            426         -              Normal
  05/05/2026 08 PM PDT            2.60            426         0              Normal
  05/05/2026 09 PM PDT            2.62            434         +              Normal
  05/05/2026 10 PM PDT            2.63            438         +              Normal
  05/05/2026 11 PM PDT            2.64            441         +              Normal
  05/06/2026 12 AM PDT            2.66            449         +              Normal
  05/06/2026 01 AM PDT            2.66            449         0              Normal
  05/06/2026 02 AM PDT            2.67            453         +              Normal
  05/06/2026 03 AM PDT            2.67            453         0              Normal
  05/06/2026 04 AM PDT            2.69            461         +              Normal
  05/06/2026 05 AM PDT            2.70            465         +              Normal
  05/06/2026 06 AM PDT            2.70            465         0              Normal
  05/06/2026 07 AM PDT            2.69            461         -              Normal
  05/06/2026 08 AM PDT            2.67            453         -              Normal
  05/06/2026 09 AM PDT            2.65            445         -              Normal
  05/06/2026 10 AM PDT            2.65            445         0              Normal
  05/06/2026 11 AM PDT            2.64            441         -              Normal
  05/06/2026 12 PM PDT            2.62            434         -              Normal
  05/06/2026 01 PM PDT            2.62            434         0              Normal
  05/06/2026 02 PM PDT            2.62            434         0              Normal
  05/06/2026 03 PM PDT            2.61            430         -              Normal
  05/06/2026 04 PM PDT            2.62            434         +              Normal
  05/06/2026 05 PM PDT            2.63            438         +              Normal
  05/06/2026 06 PM PDT            2.65            445         +              Normal
  05/06/2026 07 PM PDT            2.69            461         +              Normal
  05/06/2026 08 PM PDT            2.74            481         +              Normal
  05/06/2026 09 PM PDT            2.79            501         +              Normal
  05/06/2026 10 PM PDT            2.84            520         +              Normal
  05/06/2026 11 PM PDT            2.88            536         +              Normal
  05/07/2026 12 AM PDT            2.91            547         +              Normal
  05/07/2026 01 AM PDT            2.93            555         +              Normal
  05/07/2026 02 AM PDT            2.94            559         +              Normal
  05/07/2026 03 AM PDT            2.95            563         +              Normal
  05/07/2026 04 AM PDT            2.97            570         +              Normal
  05/07/2026 05 AM PDT            2.97            570         0              Normal
  05/07/2026 06 AM PDT            2.97            570         0              Normal
  05/07/2026 07 AM PDT            2.96            566         -              Normal
  05/07/2026 08 AM PDT            2.96            566         0              Normal
  05/07/2026 09 AM PDT            2.95            563         -              Normal
  05/07/2026 10 AM PDT            2.94            559         -              Normal
  05/07/2026 11 AM PDT            2.93            555         -              Normal
  05/07/2026 12 PM PDT            2.91            547         -              Normal
  05/07/2026 01 PM PDT            2.90            543         -              Normal
  05/07/2026 02 PM PDT            2.88            536         -              Normal
  05/07/2026 03 PM PDT            2.86            528         -              Normal
  05/07/2026 04 PM PDT            2.85            524         -              Normal
  05/07/2026 05 PM PDT            2.85            524         0              Normal
  05/07/2026 06 PM PDT            2.89            539         +              Normal
  05/07/2026 07 PM PDT            2.95            563         +              Normal
  05/07/2026 08 PM PDT            3.01            586         +              Normal
  05/07/2026 09 PM PDT            3.09            619         +              Normal
  05/07/2026 10 PM PDT            3.15            644         +              Normal
  05/07/2026 11 PM PDT            3.21            670         +              Normal
  05/08/2026 12 AM PDT            3.25            687         +              Normal
  05/08/2026 01 AM PDT            3.28            701         +              Normal
  05/08/2026 02 AM PDT            3.30            710         +              Normal
  05/08/2026 03 AM PDT            3.32            719         +              Normal
  05/08/2026 04 AM PDT            3.33            723         +              Normal
  05/08/2026 05 AM PDT            3.32            719         -              Normal
  05/08/2026 06 AM PDT            3.32            719         0              Normal
  05/08/2026 07 AM PDT            3.31            714         -              Normal
  05/08/2026 08 AM PDT            3.29            705         -              Normal
  05/08/2026 09 AM PDT            3.27            696         -              Normal
  05/08/2026 10 AM PDT            3.24            683         -              Normal
  05/08/2026 11 AM PDT            3.23            679         -              Normal
  05/08/2026 12 PM PDT            3.20            666         -              Normal
  05/08/2026 01 PM PDT            3.18            657         -              Normal
  05/08/2026 02 PM PDT            3.14            640         -              Normal
  05/08/2026 03 PM PDT            3.12            631         -              Normal
  05/08/2026 04 PM PDT            3.11            627         -              Normal
  05/08/2026 05 PM PDT            3.10            623         -              Normal
  05/08/2026 06 PM PDT            3.11            627         +              Normal
  05/08/2026 07 PM PDT            3.14            640         +              Normal
  05/08/2026 08 PM PDT            3.18            657         +              Normal
  05/08/2026 09 PM PDT            3.23            679         +              Normal
  05/08/2026 10 PM PDT            3.27            696         +              Normal
  05/08/2026 11 PM PDT            3.30            710         +              Normal
  05/09/2026 12 AM PDT            3.33            723         +              Normal
  05/09/2026 01 AM PDT            3.35            733         +              Normal
  05/09/2026 02 AM PDT            3.36            737         +              Normal
  05/09/2026 03 AM PDT            3.36            737         0              Normal
  05/09/2026 04 AM PDT            3.37            742         +              Normal
  05/09/2026 05 AM PDT            3.37            742         0              Normal
  05/09/2026 06 AM PDT            3.35            733         -              Normal
  05/09/2026 07 AM PDT            3.34            728         -              Normal
  05/09/2026 08 AM PDT            3.32            719         -              Normal
  05/09/2026 09 AM PDT            3.31            714         -              Normal
  05/09/2026 10 AM PDT            3.28            701         -              Normal
  05/09/2026 11 AM PDT            3.25            687         -              Normal
  05/09/2026 12 PM PDT            3.24            683         -              Normal
  05/09/2026 01 PM PDT            3.21            670         -              Normal
  05/09/2026 02 PM PDT            3.19            661         -              Normal
  05/09/2026 03 PM PDT            3.17            653         -              Normal
  05/09/2026 04 PM PDT            3.17            653         0              Normal
  05/09/2026 05 PM PDT            3.17            653         0              Normal
  05/09/2026 06 PM PDT            3.21            670         +              Normal
  05/09/2026 07 PM PDT            3.26            692         +              Normal
  05/09/2026 08 PM PDT            3.33            723         +              Normal
  05/09/2026 09 PM PDT            3.39            751         +              Normal
  05/09/2026 10 PM PDT            3.44            775         +              Normal
  05/09/2026 11 PM PDT            3.49            799         +              Normal
  05/10/2026 12 AM PDT            3.52            813         +              Normal
  05/10/2026 01 AM PDT            3.55            828         +              Normal
  05/10/2026 02 AM PDT            3.56            833         +              Normal
  05/10/2026 03 AM PDT            3.58            843         +              Normal
  05/10/2026 04 AM PDT            3.58            843         0              Normal
  05/10/2026 05 AM PDT            3.58            843         0              Normal
  05/10/2026 06 AM PDT            3.57            838         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  05/10/2026 07 AM PDT            3.56            833                        Normal
  05/10/2026 08 AM PDT            3.54            823         -              Normal
  05/10/2026 09 AM PDT            3.52            813         -              Normal
  05/10/2026 10 AM PDT            3.51            808         -              Normal
  05/10/2026 11 AM PDT            3.48            794         -              Normal
  05/10/2026 12 PM PDT            3.47            789         -              Normal
  05/10/2026 01 PM PDT            3.43            770         -              Normal
  05/10/2026 02 PM PDT            3.42            765         -              Normal
  05/10/2026 03 PM PDT            3.41            761         -              Normal
  05/10/2026 04 PM PDT            3.39            751         -              Normal
  05/10/2026 05 PM PDT            3.45            779         +              Normal
  05/10/2026 06 PM PDT            3.52            813         +              Normal
  05/10/2026 07 PM PDT            3.58            843         +              Normal
  05/10/2026 08 PM PDT            3.68            894         +              Normal
  05/10/2026 09 PM PDT            3.75            931         +              Normal
  05/10/2026 10 PM PDT            3.83            974         +              Normal
  05/10/2026 11 PM PDT            3.87            996         +              Normal
  05/11/2026 12 AM PDT            3.91           1019         +              Normal
  05/11/2026 01 AM PDT            3.95           1041         +              Normal
  05/11/2026 02 AM PDT            3.99           1064         +              Normal
  05/11/2026 03 AM PDT            4.00           1070         +              Normal
  05/11/2026 04 AM PDT            4.02           1082         +              Normal
  05/11/2026 05 AM PDT            4.03           1087         +              Normal
  05/11/2026 06 AM PDT            4.02           1082         -              Normal
  05/11/2026 07 AM PDT            3.99           1064         -              Normal
  05/11/2026 08 AM PDT            3.97           1053         -              Normal
  05/11/2026 09 AM PDT            3.94           1036         -              Normal
  05/11/2026 10 AM PDT            3.92           1024         -              Normal
  05/11/2026 11 AM PDT            3.88           1002         -              Normal
  05/11/2026 12 PM PDT            3.86            991         -              Normal
  05/11/2026 01 PM PDT            3.82            969         -              Normal
  05/11/2026 02 PM PDT            3.80            958         -              Normal
  05/11/2026 03 PM PDT            3.77            942         -              Normal
  05/11/2026 04 PM PDT            3.75            931         -              Normal
  05/11/2026 05 PM PDT            3.81            963         +              Normal
  05/11/2026 06 PM PDT            3.87            996         +              Normal
  05/11/2026 07 PM PDT            3.94           1036         +              Normal
  05/11/2026 08 PM PDT            4.03           1087         +              Normal
  05/11/2026 09 PM PDT            4.09           1123         +              Normal
  05/11/2026 10 PM PDT            4.17           1171         +              Normal
  05/11/2026 11 PM PDT            4.21           1196         +              Normal
  05/12/2026 12 AM PDT            4.24           1215         +              Normal
  05/12/2026 01 AM PDT            4.26           1227         +              Normal
  05/12/2026 02 AM PDT            4.29           1246         +              Normal
  05/12/2026 03 AM PDT            4.30           1253         +              Normal
  05/12/2026 04 AM PDT            4.30           1253         0              Normal
  05/12/2026 05 AM PDT            4.30           1253         0              Normal
  05/12/2026 06 AM PDT            4.28           1240         -              Normal
  05/12/2026 07 AM PDT            4.24           1215         -              Normal
  05/12/2026 08 AM PDT            4.21           1196         -              Normal
  05/12/2026 09 AM PDT            4.17           1171         -              Normal
  05/12/2026 10 AM PDT            4.15           1159         -              Normal
  05/12/2026 11 AM PDT            4.10           1129         -              Normal
  05/12/2026 12 PM PDT            4.07           1111         -              Normal
  05/12/2026 01 PM PDT            4.01           1076         -              Normal
  05/12/2026 02 PM PDT            3.99           1064         -              Normal
  05/12/2026 03 PM PDT            3.96           1047         -              Normal
  05/12/2026 04 PM PDT            3.93           1030         -              Normal
  05/12/2026 05 PM PDT            3.98           1058         +              Normal
  05/12/2026 06 PM PDT            4.04           1093         +              Normal
  05/12/2026 07 PM PDT            4.10           1129         +              Normal
  05/12/2026 08 PM PDT            4.19           1184         +              Normal
  05/12/2026 09 PM PDT            4.25           1221         +              Normal
  05/12/2026 10 PM PDT            4.32           1266         +              Normal
  05/12/2026 11 PM PDT            4.35           1285         +              Normal
  05/13/2026 12 AM PDT            4.37           1298         +              Normal
  05/13/2026 01 AM PDT            4.39           1311         +              Normal
  05/13/2026 02 AM PDT            4.41           1324         +              Normal
  05/13/2026 03 AM PDT            4.41           1324         0              Normal
  05/13/2026 04 AM PDT            4.41           1324         0              Normal
  05/13/2026 05 AM PDT            4.40           1318         -              Normal
  05/13/2026 06 AM PDT            4.38           1304         -              Normal
  05/13/2026 07 AM PDT            4.34           1278         -              Normal
  05/13/2026 08 AM PDT            4.30           1253         -              Normal
  05/13/2026 09 AM PDT            4.26           1227         -              Normal
  05/13/2026 10 AM PDT            4.23           1208         -              Normal
  05/13/2026 11 AM PDT            4.18           1177         -              Normal
  05/13/2026 12 PM PDT            4.15           1159         -              Normal
  05/13/2026 01 PM PDT            4.09           1123         -              Normal
  05/13/2026 02 PM PDT            4.06           1105         -              Normal
  05/13/2026 03 PM PDT            4.03           1087         -              Normal
  05/13/2026 04 PM PDT            4.00           1070         -              Normal
  05/13/2026 05 PM PDT            4.05           1099         +              Normal
  05/13/2026 06 PM PDT            4.11           1135         +              Normal
  05/13/2026 07 PM PDT            4.16           1165         +              Normal
  05/13/2026 08 PM PDT            4.24           1215         +              Normal
  05/13/2026 09 PM PDT            4.29           1246         +              Normal
  05/13/2026 10 PM PDT            4.36           1291         +              Normal
  05/13/2026 11 PM PDT            4.38           1304         +              Normal
  05/14/2026 12 AM PDT            4.40           1318         +              Normal
  05/14/2026 01 AM PDT            4.41           1324         +              Normal
  05/14/2026 02 AM PDT            4.42           1331         +              Normal
  05/14/2026 03 AM PDT            4.41           1324         -              Normal
  05/14/2026 04 AM PDT            4.40           1318         -              Normal
  05/14/2026 05 AM PDT            4.39           1311         -              Normal
  05/14/2026 06 AM PDT            4.35           1285         -              Normal
  05/14/2026 07 AM PDT            4.31           1259         -              Normal
  05/14/2026 08 AM PDT            4.26           1227         -              Normal
  05/14/2026 09 AM PDT            4.21           1196         -              Normal
  05/14/2026 10 AM PDT            4.18           1177         -              Normal
  05/14/2026 11 AM PDT            4.12           1141         -              Normal
  05/14/2026 12 PM PDT            4.08           1117         -              Normal
  05/14/2026 01 PM PDT            4.02           1082         -              Normal
  05/14/2026 02 PM PDT            3.98           1058         -              Normal
  05/14/2026 03 PM PDT            3.94           1036         -              Normal
  05/14/2026 04 PM PDT            3.90           1013         -              Normal
  05/14/2026 05 PM PDT            3.94           1036         +              Normal
  05/14/2026 06 PM PDT            3.98           1058         +              Normal
  05/14/2026 07 PM PDT            4.02           1082         +              Normal
  05/14/2026 08 PM PDT            4.08           1117         +              Normal
  05/14/2026 09 PM PDT            4.12           1141         +              Normal
  05/14/2026 10 PM PDT            4.17           1171         +              Normal
  05/14/2026 11 PM PDT            4.18           1177         +              Normal
  05/15/2026 12 AM PDT            4.19           1184         +              Normal
  05/15/2026 01 AM PDT            4.20           1190         +              Normal
  05/15/2026 02 AM PDT            4.21           1196         +              Normal
  05/15/2026 03 AM PDT            4.20           1190         -              Normal
  05/15/2026 04 AM PDT            4.19           1184         -              Normal
  05/15/2026 05 AM PDT            4.18           1177         -              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.