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Surface Water Data Portal

Demo snapshot · July 28, 2026 at 4:53 PM PT · not current conditions

Guadalupe watershed

Alamitos Creek at Graystone Ln

Reading 1.56 ft and 2.18 cfs. Valley Water publishes no flood threshold for this location.

Alamitos Creek at Graystone Ln plotted at latitude 37.2225 and longitude -121.8510 over Valley Water's published major-watershed layer.
Alamitos Creek at Graystone Ln at 37.2225, -121.8510, exactly as positioned in Valley Water's sensor feed. Guadalupe River is the published polygon whose name matches this portal group. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.
  • Stream gauge

1.56 ft

Captured July 28, 2026 at 4:30 PM PT

  • Sensor ID 5070
  • 37.2225, -121.8510
  • Not a flood watch sensor
  • Reporting

Flood Thresholds

Valley Water publishes no flood thresholds for this sensor. It is monitored for water supply and stream conditions rather than for flood warning.

Upstream and Downstream

Where this gauge sits on Alamitos Creek.

  1. Alamitos Creek below Almaden Reservoir

    1.97 ft · 3.5 cfs · no published threshold

  2. Alamitos Creek at Graystone Ln

    1.56 ft · 2.18 cfs · no published threshold

Sensor Notes

Gage established at this location on September 11, 1975 and still in operation. Records from other locations back to April 1958. This is the same site as USGS ID 3166900. To convert stage to NAVD88, add 240.37'.

Valley Water, sensor notes for Alamitos Creek at Graystone Ln