Maine, New Hampshire Flood Watch - Severe | Effective 06/12/2026 11:35

Clusters of slow moving thunderstorms will bring a risk of flash flooding to portions of Maine and New Hampshire later today into tonight. Storm development will support rainfall rates up to 3 inches an hour. These slow moving and repeating rounds of heavy rain could lead to localized and possibly considerable flash flooding. For Carroll County New Hampshire, recent flooding has elevated streams and saturated the ground, making this area particularly vulnerable to any rapid runoff. * WHAT...Flash Flooding caused by slow moving thunderstorms and repeating rounds of heavy rainfall. * WHERE...Portions of Maine, including the following areas, Central Somerset, Interior Cumberland Highlands, Northern Franklin, Northern Oxford, Southern Franklin, Southern Oxford and Southern Somerset and northern New Hampshire, including the following areas, Northern Carroll and Southern Carroll. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in rapid rises in area rivers and streams, and flooding of other low-lying and flood-prone locations. In recently wet areas like Carroll County New Hampshire, brooks and streams are already running high and could flood quickly with more heavy rain. * ADDITIONAL DETAILS... - Storms will be slow-moving and capable of producing torrential rainfall. Localized rainfall totals in excess of 3 inches are possible, which may occur in as little as an hour or two. Recent wet conditions keeping streams running high, and soils wet. These areas in particular will be more vulnerable to flash flooding. However rainfall amounts exceeding 3 inches in a few hours could result in flooding for most areas regardless of antecedent conditions.