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

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WALKER RIVER - MASON AT SNYDER LANE (MASN2)
Latitude: 38.92º NLongitude: 119.19º WElevation: 4420 Feet
Location: Lyon County in NevadaRiver Group: Eastern Sierra
Issuance Time: Sep 18 2021 at 7:34 AM PDTNext Issuance: Sep 19 2021 at 9:00 AM PDT
Monitor Stage: 9.0 FeetFlood Stage: 9.8 Feet

SPECIAL NOTE:Significant losses can occur in the Mason Valley upstream of the Mason stream gage. Increased forecast uncertainty exists in the long range forecast due to these unknown losses.

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Walker River - Mason at Snyder Lane (MASN2)
#
# File Generation Time:  09/18/2021 at 07:34 AM PDT
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  09/13/2021 at 08:00 AM PDT
# Maximum Observed Stage:                       4.3 Feet
# Maximum Observed Flow:                        80 cfs
#
# Earliest Date & Time of Maximum Forecast:     09/22/2021 at 02:00 AM PDT
# Maximum Forecast Stage:                       4.2 Feet
# Maximum Forecast Flow:                        68 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  09/13/2021 07 AM PDT             4.3             78                        Normal
  09/13/2021 08 AM PDT             4.3             80         +              Normal
  09/13/2021 09 AM PDT             4.3             78         -              Normal
  09/13/2021 10 AM PDT             4.3             78         0              Normal
  09/13/2021 11 AM PDT             4.3             78         0              Normal
  09/13/2021 12 PM PDT             4.3             78         0              Normal
  09/13/2021 01 PM PDT             4.3             77         -              Normal
  09/13/2021 02 PM PDT             4.3             78         +              Normal
  09/13/2021 03 PM PDT             4.3             77         -              Normal
  09/13/2021 04 PM PDT             4.3             77         0              Normal
  09/13/2021 05 PM PDT             4.3             76         -              Normal
  09/13/2021 06 PM PDT             4.3             76         0              Normal
  09/13/2021 07 PM PDT             4.3             76         0              Normal
  09/13/2021 08 PM PDT             4.3             76         0              Normal
  09/13/2021 09 PM PDT             4.3             77         +              Normal
  09/13/2021 10 PM PDT             4.3             77         0              Normal
  09/13/2021 11 PM PDT             4.3             77         0              Normal
  09/14/2021 12 AM PDT             4.3             77         0              Normal
  09/14/2021 01 AM PDT             4.3             77         0              Normal
  09/14/2021 02 AM PDT             4.3             77         0              Normal
  09/14/2021 03 AM PDT             4.3             77         0              Normal
  09/14/2021 04 AM PDT             4.3             76         -              Normal
  09/14/2021 05 AM PDT             4.3             77         +              Normal
  09/14/2021 06 AM PDT             4.3             77         0              Normal
  09/14/2021 07 AM PDT             4.3             78         +              Normal
  09/14/2021 08 AM PDT             4.3             77         -              Normal
  09/14/2021 09 AM PDT             4.3             77         0              Normal
  09/14/2021 10 AM PDT             4.3             76         -              Normal
  09/14/2021 11 AM PDT             4.3             76         0              Normal
  09/14/2021 12 PM PDT             4.3             76         0              Normal
  09/14/2021 01 PM PDT             4.3             76         0              Normal
  09/14/2021 02 PM PDT             4.3             74         -              Normal
  09/14/2021 03 PM PDT             4.3             74         0              Normal
  09/14/2021 04 PM PDT             4.3             73         -              Normal
  09/14/2021 05 PM PDT             4.3             73         0              Normal
  09/14/2021 06 PM PDT             4.3             73         0              Normal
  09/14/2021 07 PM PDT             4.3             73         0              Normal
  09/14/2021 08 PM PDT             4.3             73         0              Normal
  09/14/2021 09 PM PDT             4.3             73         0              Normal
  09/14/2021 10 PM PDT             4.3             73         0              Normal
  09/14/2021 11 PM PDT             4.3             72         -              Normal
  09/15/2021 12 AM PDT             4.3             73         +              Normal
  09/15/2021 01 AM PDT             4.3             73         0              Normal
  09/15/2021 02 AM PDT             4.3             73         0              Normal
  09/15/2021 03 AM PDT             4.3             72         -              Normal
  09/15/2021 04 AM PDT             4.3             72         0              Normal
  09/15/2021 05 AM PDT             4.3             72         0              Normal
  09/15/2021 06 AM PDT             4.3             72         0              Normal
  09/15/2021 07 AM PDT             4.3             72         0              Normal
  09/15/2021 08 AM PDT             4.3             73         +              Normal
  09/15/2021 09 AM PDT             4.3             73         0              Normal
  09/15/2021 10 AM PDT             4.3             73         0              Normal
  09/15/2021 11 AM PDT             4.3             72         -              Normal
  09/15/2021 12 PM PDT             4.3             70         -              Normal
  09/15/2021 01 PM PDT             4.3             70         0              Normal
  09/15/2021 02 PM PDT             4.2             69         -              Normal
  09/15/2021 03 PM PDT             4.2             69         0              Normal
  09/15/2021 04 PM PDT             4.2             68         -              Normal
  09/15/2021 05 PM PDT             4.2             66         -              Normal
  09/15/2021 06 PM PDT             4.2             66         0              Normal
  09/15/2021 07 PM PDT             4.2             66         0              Normal
  09/15/2021 08 PM PDT             4.2             65         -              Normal
  09/15/2021 09 PM PDT             4.2             66         +              Normal
  09/15/2021 10 PM PDT             4.2             66         0              Normal
  09/15/2021 11 PM PDT             4.2             66         0              Normal
  09/16/2021 12 AM PDT             4.2             66         0              Normal
  09/16/2021 01 AM PDT             4.2             66         0              Normal
  09/16/2021 02 AM PDT             4.2             65         -              Normal
  09/16/2021 03 AM PDT             4.2             65         0              Normal
  09/16/2021 04 AM PDT             4.2             65         0              Normal
  09/16/2021 05 AM PDT             4.2             65         0              Normal
  09/16/2021 06 AM PDT             4.2             65         0              Normal
  09/16/2021 07 AM PDT             4.2             65         0              Normal
  09/16/2021 08 AM PDT             4.2             65         0              Normal
  09/16/2021 09 AM PDT             4.2             65         0              Normal
  09/16/2021 10 AM PDT             4.2             65         0              Normal
  09/16/2021 11 AM PDT             4.2             64         -              Normal
  09/16/2021 12 PM PDT             4.2             63         -              Normal
  09/16/2021 01 PM PDT             4.2             63         0              Normal
  09/16/2021 02 PM PDT             4.2             61         -              Normal
  09/16/2021 03 PM PDT             4.2             65         +              Normal
  09/16/2021 04 PM PDT             4.2             65         0              Normal
  09/16/2021 05 PM PDT             4.2             65         0              Normal
  09/16/2021 06 PM PDT             4.2             64         -              Normal
  09/16/2021 07 PM PDT             4.2             64         0              Normal
  09/16/2021 08 PM PDT             4.2             64         0              Normal
  09/16/2021 09 PM PDT             4.2             63         -              Normal
  09/16/2021 10 PM PDT             4.2             63         0              Normal
  09/16/2021 11 PM PDT             4.2             61         -              Normal
  09/17/2021 12 AM PDT             4.2             63         +              Normal
  09/17/2021 01 AM PDT             4.2             63         0              Normal
  09/17/2021 02 AM PDT             4.2             61         -              Normal
  09/17/2021 03 AM PDT             4.2             61         0              Normal
  09/17/2021 04 AM PDT             4.2             61         0              Normal
  09/17/2021 05 AM PDT             4.2             63         +              Normal
  09/17/2021 06 AM PDT             4.2             63         0              Normal
  09/17/2021 07 AM PDT             4.2             63         0              Normal
  09/17/2021 08 AM PDT             4.2             63         0              Normal
  09/17/2021 09 AM PDT             4.2             61         -              Normal
  09/17/2021 10 AM PDT             4.2             61         0              Normal
  09/17/2021 11 AM PDT             4.2             61         0              Normal
  09/17/2021 12 PM PDT             4.2             61         0              Normal
  09/17/2021 01 PM PDT             4.2             61         0              Normal
  09/17/2021 02 PM PDT             4.2             63         +              Normal
  09/17/2021 03 PM PDT             4.2             63         0              Normal
  09/17/2021 04 PM PDT             4.2             63         0              Normal
  09/17/2021 05 PM PDT             4.2             63         0              Normal
  09/17/2021 06 PM PDT             4.2             63         0              Normal
  09/17/2021 07 PM PDT             4.2             63         0              Normal
  09/17/2021 08 PM PDT             4.2             64         +              Normal
  09/17/2021 09 PM PDT             4.2             63         -              Normal
  09/17/2021 10 PM PDT             4.2             63         0              Normal
  09/17/2021 11 PM PDT             4.2             64         +              Normal
  09/18/2021 12 AM PDT             4.2             64         0              Normal
  09/18/2021 01 AM PDT             4.2             64         0              Normal
  09/18/2021 02 AM PDT             4.2             64         0              Normal
  09/18/2021 03 AM PDT             4.2             65         +              Normal
  09/18/2021 04 AM PDT             4.2             65         0              Normal
  09/18/2021 05 AM PDT             4.2             65         0              Normal
  09/18/2021 06 AM PDT             4.2             65         0              Normal
  09/18/2021 07 AM PDT             4.2             65         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  09/18/2021 08 AM PDT             4.2             65                        Normal
  09/18/2021 09 AM PDT             4.2             65         0              Normal
  09/18/2021 10 AM PDT             4.2             65         0              Normal
  09/18/2021 11 AM PDT             4.2             65         0              Normal
  09/18/2021 12 PM PDT             4.2             65         0              Normal
  09/18/2021 01 PM PDT             4.2             64         -              Normal
  09/18/2021 02 PM PDT             4.2             64         0              Normal
  09/18/2021 03 PM PDT             4.2             64         0              Normal
  09/18/2021 04 PM PDT             4.2             64         0              Normal
  09/18/2021 05 PM PDT             4.2             64         0              Normal
  09/18/2021 06 PM PDT             4.2             65         +              Normal
  09/18/2021 07 PM PDT             4.2             65         0              Normal
  09/18/2021 08 PM PDT             4.2             65         0              Normal
  09/18/2021 09 PM PDT             4.2             65         0              Normal
  09/18/2021 10 PM PDT             4.2             65         0              Normal
  09/18/2021 11 PM PDT             4.2             65         0              Normal
  09/19/2021 12 AM PDT             4.2             65         0              Normal
  09/19/2021 01 AM PDT             4.2             65         0              Normal
  09/19/2021 02 AM PDT             4.2             65         0              Normal
  09/19/2021 03 AM PDT             4.2             65         0              Normal
  09/19/2021 04 AM PDT             4.2             65         0              Normal
  09/19/2021 05 AM PDT             4.2             65         0              Normal
  09/19/2021 06 AM PDT             4.2             65         0              Normal
  09/19/2021 07 AM PDT             4.2             65         0              Normal
  09/19/2021 08 AM PDT             4.2             65         0              Normal
  09/19/2021 09 AM PDT             4.2             65         0              Normal
  09/19/2021 10 AM PDT             4.2             65         0              Normal
  09/19/2021 11 AM PDT             4.2             65         0              Normal
  09/19/2021 12 PM PDT             4.2             65         0              Normal
  09/19/2021 01 PM PDT             4.2             65         0              Normal
  09/19/2021 02 PM PDT             4.2             65         0              Normal
  09/19/2021 03 PM PDT             4.2             64         -              Normal
  09/19/2021 04 PM PDT             4.2             64         0              Normal
  09/19/2021 05 PM PDT             4.2             64         0              Normal
  09/19/2021 06 PM PDT             4.2             65         +              Normal
  09/19/2021 07 PM PDT             4.2             65         0              Normal
  09/19/2021 08 PM PDT             4.2             65         0              Normal
  09/19/2021 09 PM PDT             4.2             65         0              Normal
  09/19/2021 10 PM PDT             4.2             65         0              Normal
  09/19/2021 11 PM PDT             4.2             65         0              Normal
  09/20/2021 12 AM PDT             4.2             65         0              Normal
  09/20/2021 01 AM PDT             4.2             65         0              Normal
  09/20/2021 02 AM PDT             4.2             65         0              Normal
  09/20/2021 03 AM PDT             4.2             65         0              Normal
  09/20/2021 04 AM PDT             4.2             65         0              Normal
  09/20/2021 05 AM PDT             4.2             65         0              Normal
  09/20/2021 06 AM PDT             4.2             65         0              Normal
  09/20/2021 07 AM PDT             4.2             65         0              Normal
  09/20/2021 08 AM PDT             4.2             65         0              Normal
  09/20/2021 09 AM PDT             4.2             65         0              Normal
  09/20/2021 10 AM PDT             4.2             65         0              Normal
  09/20/2021 11 AM PDT             4.2             65         0              Normal
  09/20/2021 12 PM PDT             4.2             65         0              Normal
  09/20/2021 01 PM PDT             4.2             65         0              Normal
  09/20/2021 02 PM PDT             4.2             65         0              Normal
  09/20/2021 03 PM PDT             4.2             65         0              Normal
  09/20/2021 04 PM PDT             4.2             65         0              Normal
  09/20/2021 05 PM PDT             4.2             65         0              Normal
  09/20/2021 06 PM PDT             4.2             65         0              Normal
  09/20/2021 07 PM PDT             4.2             65         0              Normal
  09/20/2021 08 PM PDT             4.2             65         0              Normal
  09/20/2021 09 PM PDT             4.2             65         0              Normal
  09/20/2021 10 PM PDT             4.2             65         0              Normal
  09/20/2021 11 PM PDT             4.2             66         +              Normal
  09/21/2021 12 AM PDT             4.2             66         0              Normal
  09/21/2021 01 AM PDT             4.2             66         0              Normal
  09/21/2021 02 AM PDT             4.2             66         0              Normal
  09/21/2021 03 AM PDT             4.2             66         0              Normal
  09/21/2021 04 AM PDT             4.2             66         0              Normal
  09/21/2021 05 AM PDT             4.2             66         0              Normal
  09/21/2021 06 AM PDT             4.2             66         0              Normal
  09/21/2021 07 AM PDT             4.2             66         0              Normal
  09/21/2021 08 AM PDT             4.2             66         0              Normal
  09/21/2021 09 AM PDT             4.2             66         0              Normal
  09/21/2021 10 AM PDT             4.2             66         0              Normal
  09/21/2021 11 AM PDT             4.2             66         0              Normal
  09/21/2021 12 PM PDT             4.2             66         0              Normal
  09/21/2021 01 PM PDT             4.2             66         0              Normal
  09/21/2021 02 PM PDT             4.2             66         0              Normal
  09/21/2021 03 PM PDT             4.2             66         0              Normal
  09/21/2021 04 PM PDT             4.2             66         0              Normal
  09/21/2021 05 PM PDT             4.2             66         0              Normal
  09/21/2021 06 PM PDT             4.2             66         0              Normal
  09/21/2021 07 PM PDT             4.2             66         0              Normal
  09/21/2021 08 PM PDT             4.2             66         0              Normal
  09/21/2021 09 PM PDT             4.2             66         0              Normal
  09/21/2021 10 PM PDT             4.2             66         0              Normal
  09/21/2021 11 PM PDT             4.2             66         0              Normal
  09/22/2021 12 AM PDT             4.2             66         0              Normal
  09/22/2021 01 AM PDT             4.2             66         0              Normal
  09/22/2021 02 AM PDT             4.2             68         +              Normal
  09/22/2021 03 AM PDT             4.2             68         0              Normal
  09/22/2021 04 AM PDT             4.2             68         0              Normal
  09/22/2021 05 AM PDT             4.2             68         0              Normal
  09/22/2021 06 AM PDT             4.2             68         0              Normal
  09/22/2021 07 AM PDT             4.2             68         0              Normal
  09/22/2021 08 AM PDT             4.2             68         0              Normal
  09/22/2021 09 AM PDT             4.2             68         0              Normal
  09/22/2021 10 AM PDT             4.2             66         -              Normal
  09/22/2021 11 AM PDT             4.2             66         0              Normal
  09/22/2021 12 PM PDT             4.2             66         0              Normal
  09/22/2021 01 PM PDT             4.2             66         0              Normal
  09/22/2021 02 PM PDT             4.2             66         0              Normal
  09/22/2021 03 PM PDT             4.2             66         0              Normal
  09/22/2021 04 PM PDT             4.2             66         0              Normal
  09/22/2021 05 PM PDT             4.2             66         0              Normal
  09/22/2021 06 PM PDT             4.2             68         +              Normal
  09/22/2021 07 PM PDT             4.2             68         0              Normal
  09/22/2021 08 PM PDT             4.2             68         0              Normal
  09/22/2021 09 PM PDT             4.2             68         0              Normal
  09/22/2021 10 PM PDT             4.2             68         0              Normal
  09/22/2021 11 PM PDT             4.2             68         0              Normal
  09/23/2021 12 AM PDT             4.2             68         0              Normal
  09/23/2021 01 AM PDT             4.2             68         0              Normal
  09/23/2021 02 AM PDT             4.2             68         0              Normal
  09/23/2021 03 AM PDT             4.2             68         0              Normal
  09/23/2021 04 AM PDT             4.2             68         0              Normal
  09/23/2021 05 AM PDT             4.2             68         0              Normal
#
# NOTE 1: Stages are rounded to the nearest tenth (.1) 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.