Flash Flood, Rockingham
- When
- April 21, 9:00 PM EST to April 22, 9:00 PM EST
- Where
- Rockingham County, Salem
- Reported by
- NEWSPAPER
- Coordinates
- 42.985, -71.089 (the zone’s center; the record gives no point)
Flash Flood in New Hampshire, April 21 to 22, 2000
A weakening area of low pressure moving through Michigan late in the day on the 21st redeveloped in northern Virginia. Precipitation began falling in southern New Hampshire during the late afternoon and evening of April 21st.
Where it happened
Every event with a place to put it; 1 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
- 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.
A weakening area of low pressure moving through Michigan late in the day on the 21st redeveloped in northern Virginia. Precipitation began falling in southern New Hampshire during the late afternoon and evening of April 21st. The developing low pressure area then began to move slowly northeastward and was located just southeast of New York City by 7 am on the 22nd. At this time up to 2.5 inches of rain had already fallen in portions of coastal New Hampshire. The low continued to develop and moved slowly northeast to Cape Cod by 7 am on the 23rd. Rain continued to fall in New Hampshire with additional amounts of 1 to 2 inches since the previous day. By the morning of 24th, the low was located near Yarmouth, Nova Scotia and an additional 3/4 of an inch of rain had fallen fell in southern New Hampshire.
The radar
The Boston radar (KBOX), 115 km away, was scanning. The volume nearest the first event began at 02:02 UTC.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Storm Surge in Maryland, April 21, 2000
- Flash Flooding and Flooding in Massachusetts, April 21 to 27, 2000
- Flash Flooding and Lightning Strike in New York, April 21, 2000
- Heavy Rain in Pennsylvania, April 21, 2000
- Flash Flooding and Lightning Strike in Connecticut, April 21, 2000
- Heavy Rain in New Jersey, April 21, 2000
- Flash Flood and Lightning Strikes in New Jersey, April 21, 2000
- Hail in Virginia, April 21, 2000
- Hail in Virginia, April 21, 2000
- Hail in Virginia, April 21, 2000
- Hail in Virginia, April 21, 2000
- Hail in Virginia, April 21, 2000
More
Every storm in New Hampshire in 2000Every state in 2000This day in weather historyWarnings in New Hampshire, April 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 2026-10-01. Each event’s entry at NCEI: 5142957.