New Hampshire, 2011

Flood in New Hampshire, March 11 to 13, 2011

March 11 to 13, 2011 · NWS GYX · 1 event in 1 county or zone

An additional 1 to 2 inches of rain caused the Sugar River to rise again resulting in an ice jam and flooding. Beauregard Street was again flooded with 4 feet of water.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
$25,000
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GYX wrote it up.

An additional 1 to 2 inches of rain caused the Sugar River to rise again resulting in an ice jam and flooding. Beauregard Street was again flooded with 4 feet of water.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before the first event at Mar 10, 3:47 PM EST, 21 hours 35 minutes earlier.

Area forecast discussion, Mar 10, 3:47 PM EST, 21 hours 35 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, Sullivan

When
March 11, 1:22 PM EST to March 13, 5:08 AM EST
Where
Sullivan County, 0.75 mi NNW of Claremont to 0.63 mi NNW of Claremont
Cause
Ice Jam
Property damage
$25,000
Reported by
Official NWS Observations
Coordinates
43.389, -72.358

Heavy rain and snowmelt again backed up water behind an ice jam causing flooding on the Sugar River at West Claremont (flood stage 7.0 ft), which crested at 10.0 ft.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in New Hampshire in 2011Every state in 2011This day in weather historyWarnings in New Hampshire, March 2011

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 294379.