SAN JOAQUIN RIVER - PATTERSON (PATC1)
Latitude: 37.49º NLongitude: 121.08º WElevation: 97 Feet
Location: Stanislaus County in CaliforniaBulletin Group: San JoaquinRiver Group: San Joaquin
Issuance Time: Jan 30 2026 at 12:41 PM PSTNext Issuance: Jan 31 2026 at 9:00 AM PST
Action/Monitor: 48.0 FeetMinor Flood: 54.7 FeetModerate Flood: 57.3 FeetMajor Flood: 58.3 Feet

# Tabular Observed and Forecast Hydrograph Information
#
# Location: San Joaquin River - Patterson (PATC1)
#
# File Generation Time:  01/30/2026 at 12:41 PM PST
# Data Interval:  1 Hour
#
# Most Recent Date & Time of Maximum Observed:  01/25/2026 at 01:00 PM PST
# Maximum Observed Stage:                       33.89 Feet
# Maximum Observed Flow:                        1527 cfs
#
# Earliest Date & Time of Maximum Forecast:     01/30/2026 at 01:00 PM PST
# Maximum Forecast Stage:                       33.37 Feet
# Maximum Forecast Flow:                        1302 cfs
#
# OBSERVED
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Observed Status
# ---------------------------------------------------------------------------------
  01/25/2026 12 PM PST           33.89           1527                        Normal
  01/25/2026 01 PM PST           33.89           1527         0              Normal
  01/25/2026 02 PM PST           33.87           1518         -              Normal
  01/25/2026 03 PM PST           33.86           1514         -              Normal
  01/25/2026 04 PM PST           33.86           1514         0              Normal
  01/25/2026 05 PM PST           33.86           1514         0              Normal
  01/25/2026 06 PM PST           33.85           1509         -              Normal
  01/25/2026 07 PM PST           33.84           1505         -              Normal
  01/25/2026 08 PM PST           33.83           1501         -              Normal
  01/25/2026 09 PM PST           33.82           1496         -              Normal
  01/25/2026 10 PM PST           33.82           1496         0              Normal
  01/25/2026 11 PM PST           33.81           1492         -              Normal
  01/26/2026 12 AM PST           33.80           1487         -              Normal
  01/26/2026 01 AM PST           33.80           1487         0              Normal
  01/26/2026 02 AM PST           33.79           1483         -              Normal
  01/26/2026 03 AM PST           33.78           1478         -              Normal
  01/26/2026 04 AM PST           33.77           1474         -              Normal
  01/26/2026 05 AM PST           33.77           1474         0              Normal
  01/26/2026 06 AM PST           33.76           1469         -              Normal
  01/26/2026 07 AM PST           33.75           1465         -              Normal
  01/26/2026 08 AM PST           33.75           1465         0              Normal
  01/26/2026 09 AM PST           33.75           1465         0              Normal
  01/26/2026 10 AM PST           33.74           1461         -              Normal
  01/26/2026 11 AM PST           33.74           1461         0              Normal
  01/26/2026 12 PM PST           33.73           1456         -              Normal
  01/26/2026 01 PM PST           33.76           1469         +              Normal
  01/26/2026 02 PM PST           33.76           1469         0              Normal
  01/26/2026 03 PM PST           33.76           1469         0              Normal
  01/26/2026 04 PM PST           33.72           1452         -              Normal
  01/26/2026 05 PM PST           33.70           1443         -              Normal
  01/26/2026 06 PM PST           33.70           1443         0              Normal
  01/26/2026 07 PM PST           33.69           1439         -              Normal
  01/26/2026 08 PM PST           33.67           1430         -              Normal
  01/26/2026 09 PM PST           33.67           1430         0              Normal
  01/26/2026 10 PM PST           33.66           1426         -              Normal
  01/26/2026 11 PM PST           33.64           1417         -              Normal
  01/27/2026 12 AM PST           33.64           1417         0              Normal
  01/27/2026 01 AM PST           33.64           1417         0              Normal
  01/27/2026 02 AM PST           33.63           1413         -              Normal
  01/27/2026 03 AM PST           33.62           1408         -              Normal
  01/27/2026 04 AM PST           33.61           1404         -              Normal
  01/27/2026 05 AM PST           33.61           1404         0              Normal
  01/27/2026 06 AM PST           33.60           1400         -              Normal
  01/27/2026 07 AM PST           33.60           1400         0              Normal
  01/27/2026 08 AM PST           33.59           1395         -              Normal
  01/27/2026 09 AM PST           33.59           1395         0              Normal
  01/27/2026 10 AM PST           33.58           1391         -              Normal
  01/27/2026 11 AM PST           33.58           1391         0              Normal
  01/27/2026 12 PM PST           33.58           1391         0              Normal
  01/27/2026 01 PM PST           33.57           1387         -              Normal
  01/27/2026 02 PM PST           33.57           1387         0              Normal
  01/27/2026 03 PM PST           33.57           1387         0              Normal
  01/27/2026 04 PM PST           33.56           1382         -              Normal
  01/27/2026 05 PM PST           33.55           1378         -              Normal
  01/27/2026 06 PM PST           33.55           1378         0              Normal
  01/27/2026 07 PM PST           33.55           1378         0              Normal
  01/27/2026 08 PM PST           33.54           1374         -              Normal
  01/27/2026 09 PM PST           33.54           1374         0              Normal
  01/27/2026 10 PM PST           33.54           1374         0              Normal
  01/27/2026 11 PM PST           33.53           1369         -              Normal
  01/28/2026 12 AM PST           33.53           1369         0              Normal
  01/28/2026 01 AM PST           33.53           1369         0              Normal
  01/28/2026 02 AM PST           33.53           1369         0              Normal
  01/28/2026 03 AM PST           33.53           1369         0              Normal
  01/28/2026 04 AM PST           33.52           1365         -              Normal
  01/28/2026 05 AM PST           33.51           1361         -              Normal
  01/28/2026 06 AM PST           33.52           1365         +              Normal
  01/28/2026 07 AM PST           33.52           1365         0              Normal
  01/28/2026 08 AM PST           33.52           1365         0              Normal
  01/28/2026 09 AM PST           33.51           1361         -              Normal
  01/28/2026 10 AM PST           33.51           1361         0              Normal
  01/28/2026 11 AM PST           33.51           1361         0              Normal
  01/28/2026 12 PM PST           33.51           1361         0              Normal
  01/28/2026 01 PM PST           33.49           1352         -              Normal
  01/28/2026 02 PM PST           33.50           1357         +              Normal
  01/28/2026 03 PM PST           33.50           1357         0              Normal
  01/28/2026 04 PM PST           33.49           1352         -              Normal
  01/28/2026 05 PM PST           33.49           1352         0              Normal
  01/28/2026 06 PM PST           33.49           1352         0              Normal
  01/28/2026 07 PM PST           33.48           1348         -              Normal
  01/28/2026 08 PM PST           33.48           1348         0              Normal
  01/28/2026 09 PM PST           33.47           1344         -              Normal
  01/28/2026 10 PM PST           33.47           1344         0              Normal
  01/28/2026 11 PM PST           33.47           1344         0              Normal
  01/29/2026 12 AM PST           33.46           1340         -              Normal
  01/29/2026 01 AM PST           33.46           1340         0              Normal
  01/29/2026 02 AM PST           33.45           1335         -              Normal
  01/29/2026 03 AM PST           33.45           1335         0              Normal
  01/29/2026 04 AM PST           33.44           1331         -              Normal
  01/29/2026 05 AM PST           33.44           1331         0              Normal
  01/29/2026 06 AM PST           33.44           1331         0              Normal
  01/29/2026 07 AM PST           33.43           1327         -              Normal
  01/29/2026 08 AM PST           33.43           1327         0              Normal
  01/29/2026 09 AM PST           33.42           1323         -              Normal
  01/29/2026 10 AM PST           33.42           1323         0              Normal
  01/29/2026 11 AM PST           33.42           1323         0              Normal
  01/29/2026 12 PM PST           33.41           1318         -              Normal
  01/29/2026 01 PM PST           33.41           1318         0              Normal
  01/29/2026 02 PM PST           33.41           1318         0              Normal
  01/29/2026 03 PM PST           33.40           1314         -              Normal
  01/29/2026 04 PM PST           33.39           1310         -              Normal
  01/29/2026 05 PM PST           33.39           1310         0              Normal
  01/29/2026 06 PM PST           33.39           1310         0              Normal
  01/29/2026 07 PM PST           33.38           1306         -              Normal
  01/29/2026 08 PM PST           33.38           1306         0              Normal
  01/29/2026 09 PM PST           33.37           1302         -              Normal
  01/29/2026 10 PM PST           33.38           1306         +              Normal
  01/29/2026 11 PM PST           33.38           1306         0              Normal
  01/30/2026 12 AM PST           33.38           1306         0              Normal
  01/30/2026 01 AM PST           33.37           1302         -              Normal
  01/30/2026 02 AM PST           33.38           1306         +              Normal
  01/30/2026 03 AM PST           33.38           1306         0              Normal
  01/30/2026 04 AM PST           33.38           1306         0              Normal
  01/30/2026 05 AM PST           33.38           1306         0              Normal
  01/30/2026 06 AM PST           33.37           1302         -              Normal
  01/30/2026 07 AM PST           33.38           1306         +              Normal
  01/30/2026 08 AM PST           33.37           1302         -              Normal
  01/30/2026 09 AM PST           33.37           1302         0              Normal
  01/30/2026 10 AM PST           33.37           1302         0              Normal
  01/30/2026 11 AM PST           33.37           1302         0              Normal
  01/30/2026 12 PM PST           33.37           1302         0              Normal
#
# FORECAST
#
# Date & Time  (Local)    Stage (Feet)     Flow (cfs)     Trend     Forecast Status
# ---------------------------------------------------------------------------------
  01/30/2026 01 PM PST           33.37           1302                        Normal
  01/30/2026 02 PM PST           33.37           1302         0              Normal
  01/30/2026 03 PM PST           33.36           1297         -              Normal
  01/30/2026 04 PM PST           33.36           1297         0              Normal
  01/30/2026 05 PM PST           33.36           1297         0              Normal
  01/30/2026 06 PM PST           33.35           1293         -              Normal
  01/30/2026 07 PM PST           33.35           1293         0              Normal
  01/30/2026 08 PM PST           33.34           1289         -              Normal
  01/30/2026 09 PM PST           33.34           1289         0              Normal
  01/30/2026 10 PM PST           33.34           1289         0              Normal
  01/30/2026 11 PM PST           33.33           1285         -              Normal
  01/31/2026 12 AM PST           33.33           1285         0              Normal
  01/31/2026 01 AM PST           33.32           1281         -              Normal
  01/31/2026 02 AM PST           33.32           1281         0              Normal
  01/31/2026 03 AM PST           33.31           1276         -              Normal
  01/31/2026 04 AM PST           33.31           1276         0              Normal
  01/31/2026 05 AM PST           33.30           1272         -              Normal
  01/31/2026 06 AM PST           33.30           1272         0              Normal
  01/31/2026 07 AM PST           33.29           1268         -              Normal
  01/31/2026 08 AM PST           33.29           1268         0              Normal
  01/31/2026 09 AM PST           33.28           1264         -              Normal
  01/31/2026 10 AM PST           33.28           1264         0              Normal
  01/31/2026 11 AM PST           33.27           1260         -              Normal
  01/31/2026 12 PM PST           33.27           1260         0              Normal
  01/31/2026 01 PM PST           33.26           1256         -              Normal
  01/31/2026 02 PM PST           33.26           1256         0              Normal
  01/31/2026 03 PM PST           33.25           1252         -              Normal
  01/31/2026 04 PM PST           33.25           1252         0              Normal
  01/31/2026 05 PM PST           33.24           1247         -              Normal
  01/31/2026 06 PM PST           33.24           1247         0              Normal
  01/31/2026 07 PM PST           33.23           1243         -              Normal
  01/31/2026 08 PM PST           33.23           1243         0              Normal
  01/31/2026 09 PM PST           33.22           1239         -              Normal
  01/31/2026 10 PM PST           33.22           1239         0              Normal
  01/31/2026 11 PM PST           33.21           1235         -              Normal
  02/01/2026 12 AM PST           33.21           1235         0              Normal
  02/01/2026 01 AM PST           33.21           1235         0              Normal
  02/01/2026 02 AM PST           33.20           1231         -              Normal
  02/01/2026 03 AM PST           33.20           1231         0              Normal
  02/01/2026 04 AM PST           33.19           1227         -              Normal
  02/01/2026 05 AM PST           33.19           1227         0              Normal
  02/01/2026 06 AM PST           33.19           1227         0              Normal
  02/01/2026 07 AM PST           33.18           1223         -              Normal
  02/01/2026 08 AM PST           33.18           1223         0              Normal
  02/01/2026 09 AM PST           33.18           1223         0              Normal
  02/01/2026 10 AM PST           33.17           1219         -              Normal
  02/01/2026 11 AM PST           33.17           1219         0              Normal
  02/01/2026 12 PM PST           33.17           1219         0              Normal
  02/01/2026 01 PM PST           33.17           1219         0              Normal
  02/01/2026 02 PM PST           33.17           1219         0              Normal
  02/01/2026 03 PM PST           33.16           1215         -              Normal
  02/01/2026 04 PM PST           33.16           1215         0              Normal
  02/01/2026 05 PM PST           33.16           1215         0              Normal
  02/01/2026 06 PM PST           33.16           1215         0              Normal
  02/01/2026 07 PM PST           33.16           1215         0              Normal
  02/01/2026 08 PM PST           33.16           1215         0              Normal
  02/01/2026 09 PM PST           33.16           1215         0              Normal
  02/01/2026 10 PM PST           33.15           1210         -              Normal
  02/01/2026 11 PM PST           33.15           1210         0              Normal
  02/02/2026 12 AM PST           33.15           1210         0              Normal
  02/02/2026 01 AM PST           33.15           1210         0              Normal
  02/02/2026 02 AM PST           33.15           1210         0              Normal
  02/02/2026 03 AM PST           33.15           1210         0              Normal
  02/02/2026 04 AM PST           33.15           1210         0              Normal
  02/02/2026 05 AM PST           33.15           1210         0              Normal
  02/02/2026 06 AM PST           33.15           1210         0              Normal
  02/02/2026 07 AM PST           33.15           1210         0              Normal
  02/02/2026 08 AM PST           33.15           1210         0              Normal
  02/02/2026 09 AM PST           33.15           1210         0              Normal
  02/02/2026 10 AM PST           33.15           1210         0              Normal
  02/02/2026 11 AM PST           33.14           1206         -              Normal
  02/02/2026 12 PM PST           33.14           1206         0              Normal
  02/02/2026 01 PM PST           33.14           1206         0              Normal
  02/02/2026 02 PM PST           33.14           1206         0              Normal
  02/02/2026 03 PM PST           33.14           1206         0              Normal
  02/02/2026 04 PM PST           33.14           1206         0              Normal
  02/02/2026 05 PM PST           33.14           1206         0              Normal
  02/02/2026 06 PM PST           33.14           1206         0              Normal
  02/02/2026 07 PM PST           33.14           1206         0              Normal
  02/02/2026 08 PM PST           33.14           1206         0              Normal
  02/02/2026 09 PM PST           33.14           1206         0              Normal
  02/02/2026 10 PM PST           33.14           1206         0              Normal
  02/02/2026 11 PM PST           33.14           1206         0              Normal
  02/03/2026 12 AM PST           33.14           1206         0              Normal
  02/03/2026 01 AM PST           33.14           1206         0              Normal
  02/03/2026 02 AM PST           33.14           1206         0              Normal
  02/03/2026 03 AM PST           33.14           1206         0              Normal
  02/03/2026 04 AM PST           33.14           1206         0              Normal
  02/03/2026 05 AM PST           33.14           1206         0              Normal
  02/03/2026 06 AM PST           33.14           1206         0              Normal
  02/03/2026 07 AM PST           33.14           1206         0              Normal
  02/03/2026 08 AM PST           33.14           1206         0              Normal
  02/03/2026 09 AM PST           33.14           1206         0              Normal
  02/03/2026 10 AM PST           33.14           1206         0              Normal
  02/03/2026 11 AM PST           33.14           1206         0              Normal
  02/03/2026 12 PM PST           33.14           1206         0              Normal
  02/03/2026 01 PM PST           33.14           1206         0              Normal
  02/03/2026 02 PM PST           33.14           1206         0              Normal
  02/03/2026 03 PM PST           33.14           1206         0              Normal
  02/03/2026 04 PM PST           33.14           1206         0              Normal
  02/03/2026 05 PM PST           33.14           1206         0              Normal
  02/03/2026 06 PM PST           33.14           1206         0              Normal
  02/03/2026 07 PM PST           33.14           1206         0              Normal
  02/03/2026 08 PM PST           33.14           1206         0              Normal
  02/03/2026 09 PM PST           33.14           1206         0              Normal
  02/03/2026 10 PM PST           33.14           1206         0              Normal
  02/03/2026 11 PM PST           33.14           1206         0              Normal
  02/04/2026 12 AM PST           33.14           1206         0              Normal
  02/04/2026 01 AM PST           33.14           1206         0              Normal
  02/04/2026 02 AM PST           33.14           1206         0              Normal
  02/04/2026 03 AM PST           33.14           1206         0              Normal
  02/04/2026 04 AM PST           33.14           1206         0              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.