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Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Somersworth.
Use the Radar Maps link provided to understand the trajectory of a storm.
State: NHTotal alerts: 2Updated: May 18, 2026 8:50pm EDT
Air Quality Alert
Area Interior Rockingham; Coastal Rockingham
Air Quality Alert issued May 18 at 3:50PM EDT by NWS Gray ME
The New Hampshire Department of Environmental Services has issued an
Air Quality Alert for ozone in from 10 AM to 10 PM EDT Tuesday.
Ozone levels in Rockingham County are expected to rise into the
Unhealthy for Sensitive Groups range.
The New Hampshire Department of Environmental Services is predicting
unhealthy air quality for sensitive individuals in the above-
mentioned counties. Sensitive individuals include children and older
adults; anyone with lung disease such as asthma, emphysema, and
bronchitis; and people who are active outdoors. Even healthy
individuals may experience mild health effects and should consider
limiting strenuous or prolonged outdoor activities.
For additional information, please visit the New Hampshire
Department of Environmental Prediction website at,
https://www4.des.state.nh.us/airdata/
Heat Advisory
Area Eastern Hillsborough; Interior Rockingham; Western And Central Hillsborough
Heat Advisory issued May 18 at 2:12PM EDT until May 19 at 8:00PM EDT by NWS Gray ME
* WHAT...Heat index values up to 95 expected.
* WHERE...Western and Central Hillsborough, Eastern Hillsborough,
and Interior Rockingham Counties.
* WHEN...From 11 AM to 8 PM EDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS...It will remain warm Tuesday night as
overnight lows only dip into the lower 70s.
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Somersworth weather report and traffic updates by locals
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