RUSSIAN RIVER - GEYSERVILLE (GEYC1)
Latitude: 38.71º NLongitude: 122.89º WElevation: 190 Feet
Location: Sonoma County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Issuance Time: Dec 26 2025 at 1:28 PM PSTNext Issuance: Dec 27 2025 at 9:00 AM PST
Action/Monitor: 38.0 FeetMinor Flood: 39.7 FeetModerate Flood: 46.0 FeetMajor Flood: 50.0 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: Russian River - Geyserville (GEYC1)
#
# File Generation Time:  12/26/2025 at 01:29 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  12/22/2025 at 01:00 AM PST
# Maximum Observed Stage:                       40.15 Feet
# Maximum Observed Flow:                        22023 cfs
#
# Earliest Date & Time of Maximum Forecast:     12/26/2025 at 02:00 PM PST
# Maximum Forecast Stage:                       36.05 Feet
# Maximum Forecast Flow:                        11325 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  12/21/2025 01 PM PST           31.45           4279                        Normal
  12/21/2025 02 PM PST           31.71           4541         +              Normal
  12/21/2025 03 PM PST           32.15           5051         +              Normal
  12/21/2025 04 PM PST           32.67           5700         +              Normal
  12/21/2025 05 PM PST           33.35           6631         +              Normal
  12/21/2025 06 PM PST           34.31           8111         +              Normal
  12/21/2025 07 PM PST           35.41          10059         +              Normal
  12/21/2025 08 PM PST           36.46          12189         +              Normal
  12/21/2025 09 PM PST           37.50          14576         +              Normal
  12/21/2025 10 PM PST           38.51          17174         +      Action/Monitor
  12/21/2025 11 PM PST           39.40          19706         +      Action/Monitor
  12/22/2025 12 AM PST           39.79          20889         +         Minor Flood
  12/22/2025 01 AM PST           40.15          22023         +         Minor Flood
  12/22/2025 02 AM PST           40.11          21895         -         Minor Flood
  12/22/2025 03 AM PST           40.01          21577         -         Minor Flood
  12/22/2025 04 AM PST           39.76          20796         -         Minor Flood
  12/22/2025 05 AM PST           39.50          20005         -      Action/Monitor
  12/22/2025 06 AM PST           39.26          19292         -      Action/Monitor
  12/22/2025 07 AM PST           39.04          18654         -      Action/Monitor
  12/22/2025 08 AM PST           38.82          18030         -      Action/Monitor
  12/22/2025 09 AM PST           38.60          17420         -      Action/Monitor
  12/22/2025 10 AM PST           38.35          16744         -      Action/Monitor
  12/22/2025 11 AM PST           38.12          16137         -      Action/Monitor
  12/22/2025 12 PM PST           37.89          15546         -              Normal
  12/22/2025 01 PM PST           37.62          14870         -              Normal
  12/22/2025 02 PM PST           37.49          14551         -              Normal
  12/22/2025 03 PM PST           37.33          14166         -              Normal
  12/22/2025 04 PM PST           37.16          13764         -              Normal
  12/22/2025 05 PM PST           36.99          13370         -              Normal
  12/22/2025 06 PM PST           36.78          12893         -              Normal
  12/22/2025 07 PM PST           36.48          12232         -              Normal
  12/22/2025 08 PM PST           36.04          11304         -              Normal
  12/22/2025 09 PM PST           35.64          10503         -              Normal
  12/22/2025 10 PM PST           35.13           9537         -              Normal
  12/22/2025 11 PM PST           34.61           8615         -              Normal
  12/23/2025 12 AM PST           34.12           7802         -              Normal
  12/23/2025 01 AM PST           33.68           7118         -              Normal
  12/23/2025 02 AM PST           33.33           6603         -              Normal
  12/23/2025 03 AM PST           33.04           6195         -              Normal
  12/23/2025 04 AM PST           32.79           5858         -              Normal
  12/23/2025 05 AM PST           32.59           5597         -              Normal
  12/23/2025 06 AM PST           32.45           5419         -              Normal
  12/23/2025 07 AM PST           32.34           5282         -              Normal
  12/23/2025 08 AM PST           32.20           5111         -              Normal
  12/23/2025 09 AM PST           32.10           4991         -              Normal
  12/23/2025 10 AM PST           32.03           4908         -              Normal
  12/23/2025 11 AM PST           31.99           4861         -              Normal
  12/23/2025 12 PM PST           31.93           4791         -              Normal
  12/23/2025 01 PM PST           31.83           4676         -              Normal
  12/23/2025 02 PM PST           31.76           4597         -              Normal
  12/23/2025 03 PM PST           31.68           4507         -              Normal
  12/23/2025 04 PM PST           31.62           4441         -              Normal
  12/23/2025 05 PM PST           31.58           4401         -              Normal
  12/23/2025 06 PM PST           31.56           4383         -              Normal
  12/23/2025 07 PM PST           31.51           4335         -              Normal
  12/23/2025 08 PM PST           31.50           4326         -              Normal
  12/23/2025 09 PM PST           31.52           4345         +              Normal
  12/23/2025 10 PM PST           31.56           4383         +              Normal
  12/23/2025 11 PM PST           31.68           4507         +              Normal
  12/24/2025 12 AM PST           31.88           4733         +              Normal
  12/24/2025 01 AM PST           32.26           5184         +              Normal
  12/24/2025 02 AM PST           32.73           5779         +              Normal
  12/24/2025 03 AM PST           33.31           6574         +              Normal
  12/24/2025 04 AM PST           34.06           7706         +              Normal
  12/24/2025 05 AM PST           34.87           9068         +              Normal
  12/24/2025 06 AM PST           35.77          10759         +              Normal
  12/24/2025 07 AM PST           36.67          12648         +              Normal
  12/24/2025 08 AM PST           37.48          14527         +              Normal
  12/24/2025 09 AM PST           38.15          16215         +      Action/Monitor
  12/24/2025 10 AM PST           38.59          17392         +      Action/Monitor
  12/24/2025 11 AM PST           38.78          17918         +      Action/Monitor
  12/24/2025 12 PM PST           38.74          17806         -      Action/Monitor
  12/24/2025 01 PM PST           38.55          17283         -      Action/Monitor
  12/24/2025 02 PM PST           38.26          16504         -      Action/Monitor
  12/24/2025 03 PM PST           37.92          15622         -              Normal
  12/24/2025 04 PM PST           37.57          14747         -              Normal
  12/24/2025 05 PM PST           37.24          13952         -              Normal
  12/24/2025 06 PM PST           36.94          13255         -              Normal
  12/24/2025 07 PM PST           36.67          12648         -              Normal
  12/24/2025 08 PM PST           36.42          12103         -              Normal
  12/24/2025 09 PM PST           36.25          11741         -              Normal
  12/24/2025 10 PM PST           36.09          11407         -              Normal
  12/24/2025 11 PM PST           35.91          11039         -              Normal
  12/25/2025 12 AM PST           35.83          10878         -              Normal
  12/25/2025 01 AM PST           35.84          10898         +              Normal
  12/25/2025 02 AM PST           35.88          10979         +              Normal
  12/25/2025 03 AM PST           36.03          11284         +              Normal
  12/25/2025 04 AM PST           36.24          11720         +              Normal
  12/25/2025 05 AM PST           36.40          12060         +              Normal
  12/25/2025 06 AM PST           36.47          12211         +              Normal
  12/25/2025 07 AM PST           37.12          13671         +              Normal
  12/25/2025 08 AM PST           37.27          14023         +              Normal
  12/25/2025 09 AM PST           37.63          14894         +              Normal
  12/25/2025 10 AM PST           37.68          15018         +              Normal
  12/25/2025 11 AM PST           37.72          15118         +              Normal
  12/25/2025 12 PM PST           37.57          14747         -              Normal
  12/25/2025 01 PM PST           37.44          14430         -              Normal
  12/25/2025 02 PM PST           37.34          14190         -              Normal
  12/25/2025 03 PM PST           37.32          14142         -              Normal
  12/25/2025 04 PM PST           37.21          13882         -              Normal
  12/25/2025 05 PM PST           37.07          13554         -              Normal
  12/25/2025 06 PM PST           36.93          13232         -              Normal
  12/25/2025 07 PM PST           36.85          13051         -              Normal
  12/25/2025 08 PM PST           36.82          12983         -              Normal
  12/25/2025 09 PM PST           36.80          12938         -              Normal
  12/25/2025 10 PM PST           36.79          12916         -              Normal
  12/25/2025 11 PM PST           36.84          13028         +              Normal
  12/26/2025 12 AM PST           36.98          13347         +              Normal
  12/26/2025 01 AM PST           37.08          13578         +              Normal
  12/26/2025 02 AM PST           37.14          13717         +              Normal
  12/26/2025 03 AM PST           37.19          13834         +              Normal
  12/26/2025 04 AM PST           37.13          13694         -              Normal
  12/26/2025 05 AM PST           37.01          13416         -              Normal
  12/26/2025 06 AM PST           36.85          13051         -              Normal
  12/26/2025 07 AM PST           36.67          12648         -              Normal
  12/26/2025 08 AM PST           36.49          12254         -              Normal
  12/26/2025 09 AM PST           36.31          11868         -              Normal
  12/26/2025 10 AM PST           36.20          11636         -              Normal
  12/26/2025 11 AM PST           36.17          11573         -              Normal
  12/26/2025 12 PM PST           36.17          11573         0              Normal
  12/26/2025 01 PM PST           36.10          11428         -              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  12/26/2025 02 PM PST           36.05          11325                        Normal
  12/26/2025 03 PM PST           36.00          11222         -              Normal
  12/26/2025 04 PM PST           35.95          11120         -              Normal
  12/26/2025 05 PM PST           35.92          11060         -              Normal
  12/26/2025 06 PM PST           35.93          11080         +              Normal
  12/26/2025 07 PM PST           35.98          11181         +              Normal
  12/26/2025 08 PM PST           36.01          11243         +              Normal
  12/26/2025 09 PM PST           36.04          11304         +              Normal
  12/26/2025 10 PM PST           36.05          11325         +              Normal
  12/26/2025 11 PM PST           36.01          11243         -              Normal
  12/27/2025 12 AM PST           35.92          11060         -              Normal
  12/27/2025 01 AM PST           35.78          10779         -              Normal
  12/27/2025 02 AM PST           35.60          10425         -              Normal
  12/27/2025 03 AM PST           35.40          10040         -              Normal
  12/27/2025 04 AM PST           35.19           9647         -              Normal
  12/27/2025 05 AM PST           34.99           9282         -              Normal
  12/27/2025 06 AM PST           34.81           8962         -              Normal
  12/27/2025 07 AM PST           34.65           8683         -              Normal
  12/27/2025 08 AM PST           34.48           8394         -              Normal
  12/27/2025 09 AM PST           34.31           8111         -              Normal
  12/27/2025 10 AM PST           34.14           7834         -              Normal
  12/27/2025 11 AM PST           33.98           7580         -              Normal
  12/27/2025 12 PM PST           33.81           7316         -              Normal
  12/27/2025 01 PM PST           33.65           7072         -              Normal
  12/27/2025 02 PM PST           33.49           6835         -              Normal
  12/27/2025 03 PM PST           33.35           6631         -              Normal
  12/27/2025 04 PM PST           33.23           6460         -              Normal
  12/27/2025 05 PM PST           33.11           6292         -              Normal
  12/27/2025 06 PM PST           32.98           6113         -              Normal
  12/27/2025 07 PM PST           32.85           5938         -              Normal
  12/27/2025 08 PM PST           32.72           5766         -              Normal
  12/27/2025 09 PM PST           32.60           5610         -              Normal
  12/27/2025 10 PM PST           32.48           5457         -              Normal
  12/27/2025 11 PM PST           32.36           5307         -              Normal
  12/28/2025 12 AM PST           32.24           5159         -              Normal
  12/28/2025 01 AM PST           32.12           5015         -              Normal
  12/28/2025 02 AM PST           32.00           4873         -              Normal
  12/28/2025 03 AM PST           31.89           4745         -              Normal
  12/28/2025 04 AM PST           31.78           4620         -              Normal
  12/28/2025 05 AM PST           31.67           4496         -              Normal
  12/28/2025 06 AM PST           31.56           4383         -              Normal
  12/28/2025 07 AM PST           31.43           4261         -              Normal
  12/28/2025 08 AM PST           31.32           4159         -              Normal
  12/28/2025 09 AM PST           31.20           4050         -              Normal
  12/28/2025 10 AM PST           31.09           3952         -              Normal
  12/28/2025 11 AM PST           30.98           3855         -              Normal
  12/28/2025 12 PM PST           30.86           3751         -              Normal
  12/28/2025 01 PM PST           30.77           3674         -              Normal
  12/28/2025 02 PM PST           30.69           3607         -              Normal
  12/28/2025 03 PM PST           30.61           3542         -              Normal
  12/28/2025 04 PM PST           30.53           3477         -              Normal
  12/28/2025 05 PM PST           30.45           3413         -              Normal
  12/28/2025 06 PM PST           30.37           3349         -              Normal
  12/28/2025 07 PM PST           30.30           3294         -              Normal
  12/28/2025 08 PM PST           30.23           3239         -              Normal
  12/28/2025 09 PM PST           30.16           3184         -              Normal
  12/28/2025 10 PM PST           30.10           3138         -              Normal
  12/28/2025 11 PM PST           30.04           3091         -              Normal
  12/29/2025 12 AM PST           29.98           3046         -              Normal
  12/29/2025 01 AM PST           29.91           2992         -              Normal
  12/29/2025 02 AM PST           29.86           2955         -              Normal
  12/29/2025 03 AM PST           29.80           2910         -              Normal
  12/29/2025 04 AM PST           29.75           2873         -              Normal
  12/29/2025 05 AM PST           29.70           2838         -              Normal
  12/29/2025 06 AM PST           29.64           2795         -              Normal
  12/29/2025 07 AM PST           29.59           2760         -              Normal
  12/29/2025 08 AM PST           29.54           2726         -              Normal
  12/29/2025 09 AM PST           29.49           2691         -              Normal
  12/29/2025 10 AM PST           29.49           2691         0              Normal
  12/29/2025 11 AM PST           29.42           2643         -              Normal
  12/29/2025 12 PM PST           29.37           2609         -              Normal
  12/29/2025 01 PM PST           29.33           2582         -              Normal
  12/29/2025 02 PM PST           29.29           2555         -              Normal
  12/29/2025 03 PM PST           29.25           2528         -              Normal
  12/29/2025 04 PM PST           29.21           2501         -              Normal
  12/29/2025 05 PM PST           29.18           2481         -              Normal
  12/29/2025 06 PM PST           29.14           2454         -              Normal
  12/29/2025 07 PM PST           29.10           2428         -              Normal
  12/29/2025 08 PM PST           29.07           2408         -              Normal
  12/29/2025 09 PM PST           29.03           2382         -              Normal
  12/29/2025 10 PM PST           29.00           2362         -              Normal
  12/29/2025 11 PM PST           28.97           2342         -              Normal
  12/30/2025 12 AM PST           28.94           2323         -              Normal
  12/30/2025 01 AM PST           28.91           2303         -              Normal
  12/30/2025 02 AM PST           28.88           2284         -              Normal
  12/30/2025 03 AM PST           28.85           2265         -              Normal
  12/30/2025 04 AM PST           28.82           2246         -              Normal
  12/30/2025 05 AM PST           28.79           2226         -              Normal
  12/30/2025 06 AM PST           28.76           2207         -              Normal
  12/30/2025 07 AM PST           28.73           2188         -              Normal
  12/30/2025 08 AM PST           28.71           2176         -              Normal
  12/30/2025 09 AM PST           28.68           2157         -              Normal
  12/30/2025 10 AM PST           28.66           2144         -              Normal
  12/30/2025 11 AM PST           28.63           2125         -              Normal
  12/30/2025 12 PM PST           28.61           2113         -              Normal
  12/30/2025 01 PM PST           28.58           2094         -              Normal
  12/30/2025 02 PM PST           28.55           2075         -              Normal
  12/30/2025 03 PM PST           28.53           2063         -              Normal
  12/30/2025 04 PM PST           28.51           2051         -              Normal
  12/30/2025 05 PM PST           28.48           2032         -              Normal
  12/30/2025 06 PM PST           28.46           2020         -              Normal
  12/30/2025 07 PM PST           28.43           2002         -              Normal
  12/30/2025 08 PM PST           28.42           1996         -              Normal
  12/30/2025 09 PM PST           28.40           1983         -              Normal
  12/30/2025 10 PM PST           28.38           1971         -              Normal
  12/30/2025 11 PM PST           28.36           1959         -              Normal
  12/31/2025 12 AM PST           28.33           1941         -              Normal
  12/31/2025 01 AM PST           28.31           1929         -              Normal
  12/31/2025 02 AM PST           28.29           1917         -              Normal
  12/31/2025 03 AM PST           28.27           1905         -              Normal
  12/31/2025 04 AM PST           28.25           1893         -              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.