Flood, Northern Grafton
- When
- May 11, 11:00 AM EST to May 12, 5:00 AM EST
- Where
- Northern Grafton forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 43.941, -71.820 (the zone’s center; the record gives no point)
Flooding in New Hampshire, May 11 to 14, 2000
Five inches of rain in northern New Hampshire over a five-day period caused rivers to swell. Only minor lowland flooding was reported as the Connecticut River rose over it's banks.
Where it happened
Every event with a place to put it; 2 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 2
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.
Five inches of rain in northern New Hampshire over a five-day period caused rivers to swell. Only minor lowland flooding was reported as the Connecticut River rose over it's banks. The Connecticut river in Dalton rose above the 11 ft flood stage about noon on the 11th, reached a crest of 11.7 ft at 7 pm on the 11th, then fell below flood stage at 6 am on the 12th. The Connecticut River at Dalton rose above the 17 ft flood stage after 7 pm on the 11th, crested at 19.1 ft at 2 pm on the 12th, and fell below flood stage at 2 am on the 14th.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 flood. Local standard time, as filed.
Flood, Southern Coos
- When
- May 11, 6:30 PM EST to May 14, 1:00 AM EST
- Where
- Southern Coos forecast zone
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 44.690, -71.305 (the zone’s center; the record gives no point)
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
- Tornadoes and Hail in Iowa, May 11, 2000
- Tornado and Hail in Missouri, May 11 to 12, 2000
- Heat in Texas, May 11, 2000
- Tornado and Hail in Kansas, May 11 to 12, 2000
- Tornadoes and Flood in Iowa, May 11, 2000
- Flooding and Hail in Wisconsin, May 11 to 12, 2000
- Tornadoes and Flash Flooding in Kansas, May 11, 2000
- High Surf in California, May 11 to 12, 2000
- Hail in Iowa, May 11, 2000
- Hail and Lightning Strikes in Michigan, May 11, 2000
- Damaging Winds in South Dakota, May 11, 2000
- Hail in Iowa, May 11, 2000
More
Every storm in New Hampshire in 2000Every state in 2000This day in weather historyWarnings in New Hampshire, May 2000
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: 5145504, 5145505.