Heavy Rain, Flooding Expected Across New Hampshire

Stormy pre-spring weather brings flood watch, high winds, and chilly temperatures this week.

Mar. 15, 2026 at 11:22pm

A flood watch has been issued for the entire state of New Hampshire, with forecasters warning of heavy rain, wind gusts up to 45 mph, and the potential for flooding across the region on Monday and Tuesday. Up to 3 inches of rain is expected in some areas, leading to concerns about river ice movement and isolated ice-jam flooding, especially in the northern part of the state.

Why it matters

Heavy rain and flooding can pose significant risks to public safety, infrastructure, and property in New Hampshire communities. The state has experienced several major flooding events in recent years, and this storm system has the potential to cause widespread disruption if precautions are not taken.

The details

The National Weather Service has issued a flood watch for all of New Hampshire, warning of excessive runoff that may result in flooding of rivers, creeks, streams, and other low-lying areas. The heaviest rain is expected on Monday, with up to 2 inches forecast across most of the state and up to 3 inches in higher-elevation regions like the White Mountains. Winds are also expected to gust up to 45 mph, creating the potential for power outages and downed trees. The flood watch will remain in effect through Tuesday afternoon.

  • The flood watch was issued on Sunday afternoon.
  • Heavy rain is expected all day on Monday, with highs in the upper 50s and winds between 5 and 10 mph.
  • Rain will continue into Tuesday, with partly sunny skies and highs in the lower 40s. Winds will be between 10 and 15 mph with gusts up to 35 mph.
  • Temperatures will drop into the teens overnight on Tuesday and into Wednesday morning, with gusts as high as 30 mph.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing alerts and warnings for the United States.

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What’s next

Residents in flood-prone areas of New Hampshire are advised to monitor weather conditions and be prepared to take action if necessary. State and local emergency management agencies will be closely monitoring the situation and coordinating response efforts.

The takeaway

This storm system serves as a reminder of the importance of being prepared for severe weather and flooding in New Hampshire. Residents should stay informed, heed any warnings or advisories, and take steps to protect their homes and communities from the potential impacts of heavy rain and flooding.