New Hampshire, 2011

Tropical Storm in New Hampshire, August 28, 2011

August 28, 2011 · NWS GYX · 13 events in 12 counties and zones

Hurricane Irene made landfall across western Long Island, NY and was downgraded to a Tropical Storm as it moved into and through New England. The center of Irene was located just to the southwest of New Hampshire at 5 pm Sunday evening August 28 and then travelled up the Connecticut River Valley to the northern border of New Hampshire by 11 pm.

Where it happened

Every event with a place to put it; 13 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
1
Injuries
2
Property damage
None recorded
Crop damage
None recorded
Events
13

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.

Hurricane Irene made landfall across western Long Island, NY and was downgraded to a Tropical Storm as it moved into and through New England. The center of Irene was located just to the southwest of New Hampshire at 5 pm Sunday evening August 28 and then travelled up the Connecticut River Valley to the northern border of New Hampshire by 11 pm. The storm brought a prolonged period of strong and gusty winds and heavy rain to the state. The high winds snapped or uprooted numerous trees throughout the state causing more than 160,000 customers to lose electrical and/or communication services. The heavy rains caused rivers and streams throughout the state to flood causing damage to bridges, roads, and property.

The strongest winds across the state began Sunday morning in southern areas and spread northward during the day. The strong winds continued into the evening as the center of Irene approached. Winds continued to be gusty overnight as the storm moved away from the area. Observed maximum wind gusts included 63 mph at Portsmouth, 52 mph at Concord, 51 mph at Manchester, 48 mph at Laconia, 45 mph at Berlin, 39 mph at Whitefield, and 30 mph at Lebanon. On the top of Mt. Washington, winds gusted to 104 mph as the storm approached and 120 mph as it moved away. The combination of wet soil and the prolonged period of strong and gusty winds brought down numerous trees throughout the state. One person was killed and three people were injured across the state due to falling trees or branches. In Wolfeboro, a 30 year-old man was killed and a 60-yr-old man was injured when a tree fell on them while cleaning up debris in the roadway. A man in Concord was injured when he was struck by a falling tree branch. In Bedford, a man was injured by a falling limb while cleaning up other tree limbs.

Rainfall amounts across the state ranged from 1.5 to 3 inches across southeastern New Hampshire with 3 to 6 inches across most of the remainder of the State, except in the White Mountains where 5 to 8 inches of rain fell. Rainfall was elevation dependant with the highest elevations receiving the greatest amounts. In the White Mountains, much of the rain fell within a period of only several hours causing serious flash flooding of rivers and streams across Carroll, Grafton, and Coos Counties. Many bridges and roads were washed out or damaged by the flash floods. Observed precipitation amounts included over 7 inches at Pinkham Notch, Bartlett, and Randolph, and between 6 and 7 inches at Alexandria, Gorham, Wolfeboro, and Center Sandwich. Much of the higher terrain in central and southern New Hampshire received between 4 and 6 inches of rain.

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 Aug 28, 4:02 AM EST, 2 hours 58 minutes earlier.

Area forecast discussion, Aug 28, 4:02 AM EST, 2 hours 58 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

13 tropical storm. Local standard time, as filed.

Tropical Storm, Belknap

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Belknap forecast zone
Deaths
1 direct, 0 indirect
Injuries
1 direct, 0 indirect
Reported by
Official NWS Observations
Coordinates
43.519, -71.423 (the zone’s center; the record gives no point)

Tropical Storm, Coastal Rockingham

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Coastal Rockingham forecast zone
Reported by
Official NWS Observations
Coordinates
42.985, -71.089 (the zone’s center; the record gives no point)

Tropical Storm, Interior Rockingham

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Interior Rockingham forecast zone
Reported by
Official NWS Observations
Coordinates
42.985, -71.089 (the zone’s center; the record gives no point)

Tropical Storm, Merrimack

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Merrimack forecast zone
Injuries
1 direct, 0 indirect
Reported by
Official NWS Observations
Coordinates
43.298, -71.680 (the zone’s center; the record gives no point)

Tropical Storm, Northern Carroll

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Northern Carroll forecast zone
Reported by
Official NWS Observations
Coordinates
43.874, -71.203 (the zone’s center; the record gives no point)

Tropical Storm, Northern Coos

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Northern Coos forecast zone
Reported by
Official NWS Observations
Coordinates
44.690, -71.305 (the zone’s center; the record gives no point)

Tropical Storm, Northern Grafton

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Northern Grafton forecast zone
Reported by
Official NWS Observations
Coordinates
43.941, -71.820 (the zone’s center; the record gives no point)

Tropical Storm, Southern Carroll

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Southern Carroll forecast zone
Reported by
Official NWS Observations
Coordinates
43.874, -71.203 (the zone’s center; the record gives no point)

Tropical Storm, Southern Coos

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Southern Coos forecast zone
Reported by
Official NWS Observations
Coordinates
44.690, -71.305 (the zone’s center; the record gives no point)

Tropical Storm, Southern Grafton

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Southern Grafton forecast zone
Reported by
Official NWS Observations
Coordinates
43.941, -71.820 (the zone’s center; the record gives no point)

Tropical Storm, Southern Grafton

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Southern Grafton forecast zone
Reported by
Official NWS Observations
Coordinates
43.941, -71.820 (the zone’s center; the record gives no point)

Tropical Storm, Strafford

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Strafford forecast zone
Reported by
Official NWS Observations
Coordinates
43.297, -71.029 (the zone’s center; the record gives no point)

Tropical Storm, Sullivan

When
August 28, 7:00 AM EST to 11:59 PM EST
Where
Sullivan forecast zone
Reported by
Official NWS Observations
Coordinates
43.361, -72.222 (the zone’s center; the record gives no point)

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Tropical Storm, Belknap2011-08-2830MaleUnder TreeDirect

What these are

Tropical Storm
A tropical cyclone with sustained winds of 34 to 63 knots (39 to 73 mph).

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, August 2011The 2011 hurricane season

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 2026-10-01. Each event’s entry at NCEI: 340776, 340777, 340778, 340779, 340780, 340781, 340782, 340783, 340784, 340785, 340790, 340791, 340792.