TornadoLiveMap

Lower Crystal Springs Reservoir at Dam — water level right now

San Mateo County, California · NWS gauge CSRC1
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current stage (ft)
 
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flood status
official NWS category
Official NOAA forecast → USGS data → Full US flood map →

Flood stages at this gauge

Where the water stands right now against the four official thresholds:

action · 284
Flood stageLevel (ft)What it means
Action stage284water is approaching flood level — time to pay attention

Highest floods on record here

The National Weather Service has no historic crest list on file for this gauge.

Where this gauge is

The marker is this gauge; nearby gauges load live and are clickable.

Nearby river gauges

Pilarcitos Lake 4 mi away · loading… Belmont Creek at Harbor Blvd at Old County Road 5 mi away · loading… San Francisquito Creek at Stanford University 11 mi away · loading… San Francisquito Creek at Waverly (SFWS) 11 mi away · loading… San Francisquito Creek at Pope-Chaucer (SFPC) 12 mi away · loading… San Lorenzo Creek (Alameda) at San Lorenzo 17 mi away · loading…

Gauge details

NWS gauge IDCSRC1
USGS site11162750
CountySan Mateo
StateCalifornia
NWS forecast officeMonterey
River forecast centerCalifornia Nevada River Forecast Center
Coordinates37.515, -122.356
Time zonePST8PDT
Turn Around, Don't Drown. Six inches of moving water can knock you off your feet and twelve inches can float a car. Never drive around barricades or into water of unknown depth — most flood deaths happen in vehicles.

Questions about Lower Crystal Springs Reservoir at Dam

Is Lower Crystal Springs Reservoir at Dam flooding right now?

The live reading at the top of this page answers that: the gauge is compared against its official NWS flood stages every 15 minutes. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Lower Crystal Springs Reservoir at Dam?

action stage 284 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

Where does this data come from?

From the NOAA National Water Prediction Service, the official U.S. river gauge network — a U.S. government work in the public domain. Live stage is refreshed every 15 minutes; flood thresholds and historic crests are refreshed monthly. For life-safety decisions follow NWS Monterey and local emergency management.