Severe Thunderstorms Target New Hampshire, Statewide Watch in Effect

CONCORD, NH – Residents across New Hampshire are bracing for a bout of severe weather this afternoon and evening, as a potent line of thunderstorms is forecast to sweep across the state. The National Weather Service (NWS) has issued a Severe Thunderstorm Watch for all of New Hampshire, effective until 11:00 PM EDT this Friday, June 20, 2025.

Forecasters are predicting that a strong cold front moving into a warm and humid airmass will trigger the development of numerous thunderstorms. Some of these storms are expected to become severe, posing a risk of damaging wind gusts up to 70 mph, large hail, and torrential downpours that could lead to localized flash flooding.

“The primary threats with these storms will be powerful, straight-line winds capable of downing trees and power lines, as well as the potential for hail that could cause damage to property and vehicles,” stated a meteorologist from the NWS office in Gray, Maine, which issues forecasts for New Hampshire. “We also can’t rule out an isolated tornado, though the main concern is widespread damaging winds.”

The window for the most intense weather is expected to be from mid-afternoon through the evening hours. The storms are anticipated to move from west to east across the Granite State.

As of early Friday afternoon, there were no widespread reports of damage or power outages. However, energy companies are on alert, and emergency management officials are urging the public to have a plan in place.

The New Hampshire Division of Homeland Security and Emergency Management (HSEM) is advising residents to monitor local weather forecasts closely throughout the day and to have multiple ways to receive weather alerts.

“Now is the time to secure any loose outdoor objects, such as patio furniture and trash cans, that could become projectiles in high winds,” an HSEM spokesperson recommended. “Charge your electronic devices, and make sure you have a storm kit ready with essentials like flashlights, batteries, and a first-aid kit.”

Officials also stress the importance of heading indoors at the first sign of threatening weather. If a severe thunderstorm warning is issued for your area, the safest course of action is to move to an interior room on the lowest floor of a sturdy building, away from windows.

Residents are encouraged to sign up for “NH Alerts,” the state’s emergency notification system, to receive real-time updates. The state has recently transitioned to a new platform called “Genasys Protect,” and officials are urging the public to download the new app to stay informed of any watches or warnings in their immediate area.

The weather is expected to improve overnight as the cold front pushes through, leading to a drier and less humid weekend. However, the immediate focus remains on navigating the impending severe storms safely.