New Hampshire, 2026Flooding in New Hampshire, May 15, 2026
May 15, 2026 · NWS GYX · 2 events in 2 counties and zones
25 inches in the Upper Saco Basin. Rapid runoff from the heavy rain caused river levels to rise quickly above flood stage in both New Hampshire.
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- 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.
On May 15, 2026, a widespread soaking rainfall event delivered heavy precipitation across the White Mountains region, producing basin-wide averages of 2.75 inches in the Pemigewasset Basin and approximately 3.25 inches in the Upper Saco Basin. Rapid runoff from the heavy rain caused river levels to rise quickly above flood stage in both New Hampshire. The resulting minor flooding inundated low-lying areas and riverside campgrounds in Grafton and Carroll Counties. While no structural damage was reported, the sudden rise in water levels disrupted early-season recreational activity before both rivers receded back into their banks.
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 May 15, 1:33 AM EST, 3 hours 27 minutes earlier.
Area forecast discussion, May 15, 1:33 AM EST, 3 hours 27 minutes before
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</html>Flood, Carroll
- When
- May 15, 5:00 AM EST to 11:00 PM EST
- Where
- Carroll County, 1.11 mi W of Intervale to 1.88 mi SSW of Conway
- Cause
- Heavy Rain
- Reported by
- River/Stream Gage
- Coordinates
- 44.077, -71.152
Heavy rainfall on May 15 brought basin-average precipitation of 3.25 inches to the Upper Saco Basin. The resulting runoff pushed the Saco River at Conway above its 9.0 ft flood stage during the day, reaching a crest of approximately 9.6 ft during the evening of May 15 before receding back into its banks overnight. The floodwaters resulted in minor river flooding and shallow inundation of low-lying campgrounds, avoiding structural damage.
Flood, Grafton
- When
- May 15, 8:00 AM EST to 11:00 AM EST
- Where
- Grafton County, 0.74 mi W of Livermore Falls to 0.78 mi NNE of Plymouth
- Cause
- Heavy Rain
- Reported by
- River/Stream Gage
- Coordinates
- 43.782, -71.685
On the afternoon of May 15, 2026, minor river flooding occurred along the Pemigewasset River at Plymouth, New Hampshire, driven by basin-wide rainfall averages of 2.75 inches across the Pemigewasset Basin. Water levels rose quickly during the morning, reaching the 13.0-foot flood stage by early afternoon and cresting at approximately 13.1 feet. The brief crest caused minor lowland inundation and shallow water accumulation near Plymouth State University parking areas in Grafton and Belknap Counties before the river fell back below flood stage later that afternoon. No structural damage was reported.
- 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.
- Flash Flood and Lightning Strike in Hawaii, May 15, 2026$1.1 million · 2 events
- Tornado and Damaging Winds in Wisconsin, May 15, 2026$64,000 · EF0 · 4 events
- Hail and Damaging Wind in Iowa, May 15, 20262 in hail · 19 events
- Damaging Winds and High Wind in Texas, May 15, 202663 kt wind · 17 events
- Hail and Damaging Winds in Iowa, May 15, 20261 in hail · 10 events
- Hail and Damaging Winds in Nebraska, May 15, 20261 in hail · 9 events
- Damaging Wind and High Wind in North Dakota, May 15, 202657 kt wind · 8 events
- Damaging Winds in Oklahoma, May 15, 202664 kt wind · 8 events
- High Wind and Strong Wind in Texas, May 15, 2026$2,000 · 59 kt wind · 4 events
- Damaging Winds and High Wind in Oklahoma, May 15 to 16, 2026$5,000 · 60 kt wind · 4 events
- High Wind in North Dakota, May 15, 202656 kt wind · 3 events
- High Wind in Minnesota, May 15, 202652 kt wind · 2 events
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: 1342372, 1342376.