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SOUTH FORK GUALALA RIVER - SEA RANCH (GSRC1)
| Latitude: 38.71º N | Longitude: 123.43º W | Elevation: 40 Feet | | Forecast Type: Unofficial Location |
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa |
| Issuance Time: | Apr 20 2026 at 6:54 AM PDT | Next Issuance: | Apr 21 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: South Fork Gualala River - Sea Ranch (GSRC1)
#
# File Generation Time: 04/20/2026 at 06:55 AM PDT
# Data Interval: 1 Hour
#
# Most Recent Date & Time of Maximum Observed: 04/15/2026 at 07:00 AM PDT
# Maximum Observed Stage: 5.87 Feet
# Maximum Observed Flow: 114 cfs
#
# Earliest Date & Time of Maximum Forecast: 04/22/2026 at 12:00 AM PDT
# Maximum Forecast Stage: 7.68 Feet
# Maximum Forecast Flow: 523 cfs
#
# OBSERVED
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Observed Status
# ---------------------------------------------------------------------------------
04/15/2026 06 AM PDT 5.87 114 Not Applicable
04/15/2026 07 AM PDT 5.87 114 0 Not Applicable
04/15/2026 08 AM PDT 5.86 113 - Not Applicable
04/15/2026 09 AM PDT 5.85 112 - Not Applicable
04/15/2026 10 AM PDT 5.84 110 - Not Applicable
04/15/2026 11 AM PDT 5.84 110 0 Not Applicable
04/15/2026 12 PM PDT 5.83 109 - Not Applicable
04/15/2026 01 PM PDT 5.82 108 - Not Applicable
04/15/2026 02 PM PDT 5.81 107 - Not Applicable
04/15/2026 03 PM PDT 5.80 106 - Not Applicable
04/15/2026 04 PM PDT 5.80 106 0 Not Applicable
04/15/2026 05 PM PDT 5.80 106 0 Not Applicable
04/15/2026 06 PM PDT 5.79 104 - Not Applicable
04/15/2026 07 PM PDT 5.78 103 - Not Applicable
04/15/2026 08 PM PDT 5.78 103 0 Not Applicable
04/15/2026 09 PM PDT 5.78 103 0 Not Applicable
04/15/2026 10 PM PDT 5.77 102 - Not Applicable
04/15/2026 11 PM PDT 5.76 101 - Not Applicable
04/16/2026 12 AM PDT 5.76 101 0 Not Applicable
04/16/2026 01 AM PDT 5.76 101 0 Not Applicable
04/16/2026 02 AM PDT 5.75 100 - Not Applicable
04/16/2026 03 AM PDT 5.75 100 0 Not Applicable
04/16/2026 04 AM PDT 5.75 100 0 Not Applicable
04/16/2026 05 AM PDT 5.74 98 - Not Applicable
04/16/2026 06 AM PDT 5.73 97 - Not Applicable
04/16/2026 07 AM PDT 5.73 97 0 Not Applicable
04/16/2026 08 AM PDT 5.72 96 - Not Applicable
04/16/2026 09 AM PDT 5.71 95 - Not Applicable
04/16/2026 10 AM PDT 5.71 95 0 Not Applicable
04/16/2026 11 AM PDT 5.71 95 0 Not Applicable
04/16/2026 12 PM PDT 5.70 94 - Not Applicable
04/16/2026 01 PM PDT 5.70 94 0 Not Applicable
04/16/2026 02 PM PDT 5.69 92 - Not Applicable
04/16/2026 03 PM PDT 5.69 92 0 Not Applicable
04/16/2026 04 PM PDT 5.69 92 0 Not Applicable
04/16/2026 05 PM PDT 5.68 91 - Not Applicable
04/16/2026 06 PM PDT 5.68 91 0 Not Applicable
04/16/2026 07 PM PDT 5.67 90 - Not Applicable
04/16/2026 08 PM PDT 5.67 90 0 Not Applicable
04/16/2026 09 PM PDT 5.67 90 0 Not Applicable
04/16/2026 10 PM PDT 5.66 88 - Not Applicable
04/16/2026 11 PM PDT 5.66 88 0 Not Applicable
04/17/2026 12 AM PDT 5.66 88 0 Not Applicable
04/17/2026 01 AM PDT 5.65 87 - Not Applicable
04/17/2026 02 AM PDT 5.65 87 0 Not Applicable
04/17/2026 03 AM PDT 5.64 86 - Not Applicable
04/17/2026 04 AM PDT 5.64 86 0 Not Applicable
04/17/2026 05 AM PDT 5.63 84 - Not Applicable
04/17/2026 06 AM PDT 5.63 84 0 Not Applicable
04/17/2026 07 AM PDT 5.62 83 - Not Applicable
04/17/2026 08 AM PDT 5.62 83 0 Not Applicable
04/17/2026 09 AM PDT 5.62 83 0 Not Applicable
04/17/2026 10 AM PDT 5.61 82 - Not Applicable
04/17/2026 11 AM PDT 5.60 81 - Not Applicable
04/17/2026 12 PM PDT 5.61 82 + Not Applicable
04/17/2026 01 PM PDT 5.60 81 - Not Applicable
04/17/2026 02 PM PDT 5.59 79 - Not Applicable
04/17/2026 03 PM PDT 5.58 78 - Not Applicable
04/17/2026 04 PM PDT 5.58 78 0 Not Applicable
04/17/2026 05 PM PDT 5.57 77 - Not Applicable
04/17/2026 06 PM PDT 5.57 77 0 Not Applicable
04/17/2026 07 PM PDT 5.57 77 0 Not Applicable
04/17/2026 08 PM PDT 5.58 78 + Not Applicable
04/17/2026 09 PM PDT 5.57 77 - Not Applicable
04/17/2026 10 PM PDT 5.57 77 0 Not Applicable
04/17/2026 11 PM PDT 5.57 77 0 Not Applicable
04/18/2026 12 AM PDT 5.56 76 - Not Applicable
04/18/2026 01 AM PDT 5.56 76 0 Not Applicable
04/18/2026 02 AM PDT 5.56 76 0 Not Applicable
04/18/2026 03 AM PDT 5.56 76 0 Not Applicable
04/18/2026 04 AM PDT 5.56 76 0 Not Applicable
04/18/2026 05 AM PDT 5.55 75 - Not Applicable
04/18/2026 06 AM PDT 5.55 75 0 Not Applicable
04/18/2026 07 AM PDT 5.54 73 - Not Applicable
04/18/2026 08 AM PDT 5.54 73 0 Not Applicable
04/18/2026 09 AM PDT 5.53 72 - Not Applicable
04/18/2026 10 AM PDT 5.52 71 - Not Applicable
04/18/2026 11 AM PDT 5.52 71 0 Not Applicable
04/18/2026 12 PM PDT 5.52 71 0 Not Applicable
04/18/2026 01 PM PDT 5.52 71 0 Not Applicable
04/18/2026 02 PM PDT 5.52 71 0 Not Applicable
04/18/2026 03 PM PDT 5.52 71 0 Not Applicable
04/18/2026 04 PM PDT 5.51 70 - Not Applicable
04/18/2026 05 PM PDT 5.50 69 - Not Applicable
04/18/2026 06 PM PDT 5.50 69 0 Not Applicable
04/18/2026 07 PM PDT 5.51 70 + Not Applicable
04/18/2026 08 PM PDT 5.50 69 - Not Applicable
04/18/2026 09 PM PDT 5.50 69 0 Not Applicable
04/18/2026 10 PM PDT 5.50 69 0 Not Applicable
04/18/2026 11 PM PDT 5.50 69 0 Not Applicable
04/19/2026 12 AM PDT 5.50 69 0 Not Applicable
04/19/2026 01 AM PDT 5.50 69 0 Not Applicable
04/19/2026 02 AM PDT 5.50 69 0 Not Applicable
04/19/2026 03 AM PDT 5.49 68 - Not Applicable
04/19/2026 04 AM PDT 5.49 68 0 Not Applicable
04/19/2026 05 AM PDT 5.49 68 0 Not Applicable
04/19/2026 06 AM PDT 5.49 68 0 Not Applicable
04/19/2026 07 AM PDT 5.49 68 0 Not Applicable
04/19/2026 08 AM PDT 5.49 68 0 Not Applicable
04/19/2026 09 AM PDT 5.48 66 - Not Applicable
04/19/2026 10 AM PDT 5.48 66 0 Not Applicable
04/19/2026 11 AM PDT 5.47 65 - Not Applicable
04/19/2026 12 PM PDT 5.47 65 0 Not Applicable
04/19/2026 01 PM PDT 5.46 64 - Not Applicable
04/19/2026 02 PM PDT 5.46 64 0 Not Applicable
04/19/2026 03 PM PDT 5.47 65 + Not Applicable
04/19/2026 04 PM PDT 5.47 65 0 Not Applicable
04/19/2026 05 PM PDT 5.46 64 - Not Applicable
04/19/2026 06 PM PDT 5.46 64 0 Not Applicable
04/19/2026 07 PM PDT 5.46 64 0 Not Applicable
04/19/2026 08 PM PDT 5.46 64 0 Not Applicable
04/19/2026 09 PM PDT 5.46 64 0 Not Applicable
04/19/2026 10 PM PDT 5.45 63 - Not Applicable
04/19/2026 11 PM PDT 5.45 63 0 Not Applicable
04/20/2026 12 AM PDT 5.45 63 0 Not Applicable
04/20/2026 01 AM PDT 5.45 63 0 Not Applicable
04/20/2026 02 AM PDT 5.45 63 0 Not Applicable
04/20/2026 03 AM PDT 5.45 63 0 Not Applicable
04/20/2026 04 AM PDT 5.45 63 0 Not Applicable
04/20/2026 05 AM PDT 5.45 63 0 Not Applicable
04/20/2026 06 AM PDT 5.45 63 0 Not Applicable
#
# FORECAST
#
# Date & Time (Local) Stage (Feet) Flow (cfs) Trend Forecast Status
# ---------------------------------------------------------------------------------
04/20/2026 07 AM PDT 5.45 63 Not Applicable
04/20/2026 08 AM PDT 5.44 62 - Not Applicable
04/20/2026 09 AM PDT 5.44 62 0 Not Applicable
04/20/2026 10 AM PDT 5.44 62 0 Not Applicable
04/20/2026 11 AM PDT 5.45 63 + Not Applicable
04/20/2026 12 PM PDT 5.45 63 0 Not Applicable
04/20/2026 01 PM PDT 5.47 65 + Not Applicable
04/20/2026 02 PM PDT 5.49 68 + Not Applicable
04/20/2026 03 PM PDT 5.51 70 + Not Applicable
04/20/2026 04 PM PDT 5.55 75 + Not Applicable
04/20/2026 05 PM PDT 5.60 81 + Not Applicable
04/20/2026 06 PM PDT 5.67 90 + Not Applicable
04/20/2026 07 PM PDT 5.79 104 + Not Applicable
04/20/2026 08 PM PDT 5.93 122 + Not Applicable
04/20/2026 09 PM PDT 6.09 144 + Not Applicable
04/20/2026 10 PM PDT 6.24 168 + Not Applicable
04/20/2026 11 PM PDT 6.38 192 + Not Applicable
04/21/2026 12 AM PDT 6.49 212 + Not Applicable
04/21/2026 01 AM PDT 6.57 227 + Not Applicable
04/21/2026 02 AM PDT 6.61 235 + Not Applicable
04/21/2026 03 AM PDT 6.64 241 + Not Applicable
04/21/2026 04 AM PDT 6.65 243 + Not Applicable
04/21/2026 05 AM PDT 6.65 243 0 Not Applicable
04/21/2026 06 AM PDT 6.64 241 - Not Applicable
04/21/2026 07 AM PDT 6.65 243 + Not Applicable
04/21/2026 08 AM PDT 6.66 246 + Not Applicable
04/21/2026 09 AM PDT 6.67 248 + Not Applicable
04/21/2026 10 AM PDT 6.69 252 + Not Applicable
04/21/2026 11 AM PDT 6.72 258 + Not Applicable
04/21/2026 12 PM PDT 6.75 265 + Not Applicable
04/21/2026 01 PM PDT 6.79 274 + Not Applicable
04/21/2026 02 PM PDT 6.83 283 + Not Applicable
04/21/2026 03 PM PDT 6.87 292 + Not Applicable
04/21/2026 04 PM PDT 6.92 304 + Not Applicable
04/21/2026 05 PM PDT 6.98 318 + Not Applicable
04/21/2026 06 PM PDT 7.07 341 + Not Applicable
04/21/2026 07 PM PDT 7.20 376 + Not Applicable
04/21/2026 08 PM PDT 7.33 412 + Not Applicable
04/21/2026 09 PM PDT 7.45 448 + Not Applicable
04/21/2026 10 PM PDT 7.56 483 + Not Applicable
04/21/2026 11 PM PDT 7.63 506 + Not Applicable
04/22/2026 12 AM PDT 7.68 523 + Not Applicable
04/22/2026 01 AM PDT 7.67 519 - Not Applicable
04/22/2026 02 AM PDT 7.63 506 - Not Applicable
04/22/2026 03 AM PDT 7.59 493 - Not Applicable
04/22/2026 04 AM PDT 7.53 473 - Not Applicable
04/22/2026 05 AM PDT 7.47 454 - Not Applicable
04/22/2026 06 AM PDT 7.44 445 - Not Applicable
04/22/2026 07 AM PDT 7.43 442 - Not Applicable
04/22/2026 08 AM PDT 7.46 451 + Not Applicable
04/22/2026 09 AM PDT 7.49 461 + Not Applicable
04/22/2026 10 AM PDT 7.53 473 + Not Applicable
04/22/2026 11 AM PDT 7.55 480 + Not Applicable
04/22/2026 12 PM PDT 7.54 476 - Not Applicable
04/22/2026 01 PM PDT 7.50 464 - Not Applicable
04/22/2026 02 PM PDT 7.44 445 - Not Applicable
04/22/2026 03 PM PDT 7.36 421 - Not Applicable
04/22/2026 04 PM PDT 7.25 389 - Not Applicable
04/22/2026 05 PM PDT 7.13 357 - Not Applicable
04/22/2026 06 PM PDT 7.00 323 - Not Applicable
04/22/2026 07 PM PDT 6.87 292 - Not Applicable
04/22/2026 08 PM PDT 6.74 263 - Not Applicable
04/22/2026 09 PM PDT 6.62 237 - Not Applicable
04/22/2026 10 PM PDT 6.52 217 - Not Applicable
04/22/2026 11 PM PDT 6.42 199 - Not Applicable
04/23/2026 12 AM PDT 6.33 183 - Not Applicable
04/23/2026 01 AM PDT 6.25 169 - Not Applicable
04/23/2026 02 AM PDT 6.17 157 - Not Applicable
04/23/2026 03 AM PDT 6.10 146 - Not Applicable
04/23/2026 04 AM PDT 6.04 137 - Not Applicable
04/23/2026 05 AM PDT 5.99 130 - Not Applicable
04/23/2026 06 AM PDT 5.95 125 - Not Applicable
04/23/2026 07 AM PDT 5.91 119 - Not Applicable
04/23/2026 08 AM PDT 5.87 114 - Not Applicable
04/23/2026 09 AM PDT 5.84 110 - Not Applicable
04/23/2026 10 AM PDT 5.81 107 - Not Applicable
04/23/2026 11 AM PDT 5.79 104 - Not Applicable
04/23/2026 12 PM PDT 5.76 101 - Not Applicable
04/23/2026 01 PM PDT 5.75 100 - Not Applicable
04/23/2026 02 PM PDT 5.73 97 - Not Applicable
04/23/2026 03 PM PDT 5.71 95 - Not Applicable
04/23/2026 04 PM PDT 5.70 94 - Not Applicable
04/23/2026 05 PM PDT 5.69 92 - Not Applicable
04/23/2026 06 PM PDT 5.68 91 - Not Applicable
04/23/2026 07 PM PDT 5.67 90 - Not Applicable
04/23/2026 08 PM PDT 5.67 90 0 Not Applicable
04/23/2026 09 PM PDT 5.66 88 - Not Applicable
04/23/2026 10 PM PDT 5.65 87 - Not Applicable
04/23/2026 11 PM PDT 5.65 87 0 Not Applicable
04/24/2026 12 AM PDT 5.64 86 - Not Applicable
04/24/2026 01 AM PDT 5.64 86 0 Not Applicable
04/24/2026 02 AM PDT 5.63 84 - Not Applicable
04/24/2026 03 AM PDT 5.63 84 0 Not Applicable
04/24/2026 04 AM PDT 5.62 83 - Not Applicable
04/24/2026 05 AM PDT 5.62 83 0 Not Applicable
04/24/2026 06 AM PDT 5.62 83 0 Not Applicable
04/24/2026 07 AM PDT 5.61 82 - Not Applicable
04/24/2026 08 AM PDT 5.61 82 0 Not Applicable
04/24/2026 09 AM PDT 5.60 81 - Not Applicable
04/24/2026 10 AM PDT 5.60 81 0 Not Applicable
04/24/2026 11 AM PDT 5.60 81 0 Not Applicable
04/24/2026 12 PM PDT 5.59 79 - Not Applicable
04/24/2026 01 PM PDT 5.59 79 0 Not Applicable
04/24/2026 02 PM PDT 5.59 79 0 Not Applicable
04/24/2026 03 PM PDT 5.58 78 - Not Applicable
04/24/2026 04 PM PDT 5.58 78 0 Not Applicable
04/24/2026 05 PM PDT 5.58 78 0 Not Applicable
04/24/2026 06 PM PDT 5.57 77 - Not Applicable
04/24/2026 07 PM PDT 5.57 77 0 Not Applicable
04/24/2026 08 PM PDT 5.57 77 0 Not Applicable
04/24/2026 09 PM PDT 5.57 77 0 Not Applicable
04/24/2026 10 PM PDT 5.56 76 - Not Applicable
04/24/2026 11 PM PDT 5.56 76 0 Not Applicable
04/25/2026 12 AM PDT 5.56 76 0 Not Applicable
04/25/2026 01 AM PDT 5.55 75 - Not Applicable
04/25/2026 02 AM PDT 5.55 75 0 Not Applicable
04/25/2026 03 AM PDT 5.55 75 0 Not Applicable
04/25/2026 04 AM PDT 5.55 75 0 Not Applicable
04/25/2026 05 AM PDT 5.55 75 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.
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