TornadoLiveMap

Napa River near St. Helena — water level right now

Napa County, California · NWS gauge SHEC1
Loading the latest reading…
–
current stage (ft)
 
18
minor flood stage
 
23.61
record crest
set 2005-12-31
–
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 · 16
minor · 18
moderate · 20
major · 22
Flood stageLevel (ft)What it means
Major flood stage22extensive inundation and significant evacuations — a serious event
Moderate flood stage20some buildings and roads inundated; evacuations possible
Minor flood stage18low-lying roads and fields near the river start to flood
Action stage16water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
123.612005-12-31+5.61 above
219.52019-02-27+1.5 above
319.22017-02-07+1.2 above
417.71997-01-010.3 below
517.471995-01-090.53 below
6171997-01-221 below
716.872012-12-231.13 below
816.822021-10-241.18 below
916.791983-03-131.21 below
1016.712023-01-091.29 below
1116.671993-01-201.33 below
1216.612023-03-101.39 below

Historic crests recorded at this gauge by the National Weather Service — the 12 highest on file.

Where this gauge is

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

Nearby river gauges

Sulphur Creek at Pope Street 1 mi away · loading… Napa River at Lodi Lane 2 mi away · loading… Hopper Creek at Highway 29 9 mi away · loading… Sonoma Creek at Kenwood 9 mi away · loading… Dry Creek (Napa) at Highway 29 12 mi away · loading… Napa River near Napa 13 mi away · loading…

Gauge details

NWS gauge IDSHEC1
USGS site11456000
CountyNapa
StateCalifornia
NWS forecast officeMonterey
River forecast centerCalifornia Nevada River Forecast Center
Coordinates38.511, -122.456
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 Napa River near St. Helena

Is Napa River near St. Helena 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. Minor flooding at this gauge begins at 18 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Napa River near St. Helena?

major flood stage 22 ft, moderate flood stage 20 ft, minor flood stage 18 ft, action stage 16 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Napa River near St. Helena?

The highest crest on file at this gauge is 23.61 ft, reached on 2005-12-31 — that is 5.61 ft above minor flood stage. The full list of the highest crests is in the table on this page.

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.