Flood Watch 06/06/2025 12:23 for New Hampshire areas

Clusters of slow moving thunderstorms will bring a risk of flash flooding to portions of central and southern New Hampshire today. A nearby stationary front will support storm development this afternoon, with rainfall rates up to 2 inches an hour. These slow moving and repeating rounds of heavy rain could lead to potentially significant flash flooding. * WHAT...Flash Flooding caused by slow moving thunderstorms and repeating rounds of heavy rainfall. Significant flooding impacts are possible. * WHERE...Portions of central, northern, and southern New Hampshire, including the following areas, in New Hampshire, Western And Central Hillsborough. In central New Hampshire, Belknap, Merrimack, Strafford and Sullivan. In northern New Hampshire, Northern Carroll, Northern Grafton, Southern Carroll and Southern Grafton. In southern New Hampshire, Cheshire, Eastern Hillsborough and Interior Rockingham. * WHEN...Until midnight EDT tonight. * IMPACTS...Excessive runoff may result in flooding of already swollen streams and other low-lying and flood-prone locations including urban areas. * ADDITIONAL DETAILS... - Repeating rounds of heavy rainfall could result in localized rainfall amounts of 3 inches or more through this evening. Recent wet conditions across central and southern New Hampshire are 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.