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Souhegan River at Merrimack — water level right now

Hillsborough County, New Hampshire · NWS gauge SOHN3
Loading the latest reading…
–
current stage (ft)
 
9
minor flood stage
 
16.2
record crest
set 1936-03-19
–
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 · 8
minor · 9
moderate · 11
major · 13
Flood stageLevel (ft)What it means
Major flood stage13extensive inundation and significant evacuations — a serious event
Moderate flood stage11some buildings and roads inundated; evacuations possible
Minor flood stage9low-lying roads and fields near the river start to flood
Action stage8water is approaching flood level — time to pay attention

Highest floods on record here

#Crest (ft)Datevs. minor flood stage
116.21936-03-19+7.2 above
212.781938-09-21+3.78 above
312.712007-04-17+3.71 above
411.821924-04-08+2.82 above
510.881944-06-25+1.88 above
610.661934-04-13+1.66 above
710.61936-03-13+1.6 above
810.31955-10-16+1.3 above
910.251987-04-07+1.25 above
10101956-01-10+1 above
119.961996-10-22+0.96 above
129.921937-11-14+0.92 above

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

Merrimack River at Goffs Falls 7 mi away · loading… Merrimack River at Nashua 7 mi away · loading… Souhegan River at Milford 10 mi away · loading… Piscataquog River at Goffstown 11 mi away · loading… Contoocook River at Peterborough 23 mi away · loading… Merrimack River at Concord 24 mi away · loading…

Gauge details

NWS gauge IDSOHN3
USGS site01094000
CountyHillsborough
StateNew Hampshire
NWS forecast officeGray
River forecast centerNortheast River Forecast Center
Coordinates42.858, -71.506
Time zoneEST5EDT
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 Souhegan River at Merrimack

Is Souhegan River at Merrimack 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 9 ft. Blue means normal, yellow is action stage, orange minor, red moderate and dark red major flooding.

What is flood stage for Souhegan River at Merrimack?

major flood stage 13 ft, moderate flood stage 11 ft, minor flood stage 9 ft, action stage 8 ft. These are official National Weather Service thresholds set specifically for this gauge, not generic values.

What is the record flood at Souhegan River at Merrimack?

The highest crest on file at this gauge is 16.2 ft, reached on 1936-03-19 — that is 7.2 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 Gray and local emergency management.