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Surface Water Data Portal

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

Guadalupe watershed

Calero Creek below Calero Reservoir

Reading 1.39 ft and 0.8 cfs. That is 2.41 feet below the first flood threshold.

Calero Creek below Calero Reservoir plotted at latitude 37.1861 and longitude -121.7930 over Valley Water's published major-watershed layer.
Calero Creek below Calero Reservoir at 37.1861, -121.7930, 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

1.39 ft

Captured July 28, 2026 at 4:30 PM PT

  • Sensor ID 5013
  • 37.1861, -121.7930
  • Included in Valley Water's flood watch, carries a forecast model
  • Reporting

What Floods at Each Level

These descriptions are Valley Water's own, quoted exactly as published for this gauge.

Threshold 1 · 3.8 ft (94 cfs)

2.41 ft above the current reading

Homes along Calero Creek might experience minor backyard flooding. If Calero Dam is not expected to spill, nothing further needs to be done.

Valley Water, threshold 1 description for Calero Creek below Calero Reservoir

Threshold 2 · 5 ft (199 cfs)

3.61 ft above the current reading

Homes along Calero Creek may experience flooding. Creek capacity is low and if Calero Reservoir is/will spill, action should be taken. Check Calero Reservoir elevation.

Valley Water, threshold 2 description for Calero Creek below Calero Reservoir

Threshold 3 · 5.5 ft (256 cfs)

4.11 ft above the current reading

If Calero Reservoir is full and spilling, widespread flooding will occur around the Creek and in the McKean Road area

Valley Water, threshold 3 description for Calero Creek below Calero Reservoir

Places This Gauge Covers

Streets and landmarks named in the threshold descriptions above.

Upstream and Downstream

Where this gauge sits on Calero Creek.

  1. Calero Creek above Calero Reservoir

    3.67 ft · 0 cfs · no published threshold

  2. Calero Creek below Calero Reservoir

    1.39 ft · 0.8 cfs · 2.41 ft below threshold 1

Sensor Notes

Gage captures Calero Dam releases and spillway flows. Flow past the station is partially regulated by releases from Calero Dam. Dam seepage and upstream creek flows are included in total station flows and may be significant during storm periods.

Valley Water, sensor notes for Calero Creek below Calero Reservoir