UPDATE — Thursday, November 12, 1:58 PM CT: The storm is now over Ambler, about 12 miles northwest of Philadelphia, moving northeast at 20 miles per hour. Trained weather spotters report quarter-size hail, and hail was reported in Bridgeport earlier. A Tornado Watch remains in effect until 7:00 PM EST for southeastern Pennsylvania.

Severe Thunderstorm Warning for Bucks and Montgomery Counties Through 3:30 PM

Norristown, Pennsylvania — A severe thunderstorm is moving northeast across southeastern Pennsylvania this afternoon, and the National Weather Service in Mount Holly, New Jersey has issued a Severe Thunderstorm Warning until 3:30 PM EST for Bucks and Montgomery counties.

What is happening:

At 2:45 PM EST, the storm was over Norristown, about 12 miles northwest of Philadelphia, moving northeast at 20 miles per hour. Trained weather spotters report quarter-size hail with this storm, and penny-size hail was already reported in King of Prussia. Towns in the path include Norristown, Lansdale, West Norriton, East Norriton, Conshohocken, Hatboro, Ambler, Chalfont, Ivyland, Fricks, Willow Grove, Plymouth Meeting, King of Prussia, Richboro, Horsham, Bridgeport, North Wales, New Britain, West Conshohocken and Fort Washington.

Local impacts:

Quarter-size hail can cause minor damage to vehicles. A Tornado Watch remains in effect until 7:00 PM EST for southeastern Pennsylvania, and tornadoes can develop quickly from severe thunderstorms.

What to do:

Move to an interior room on the lowest floor of a building.

Move indoors immediately if you can hear thunder, you are close enough to be struck by lightning.

Stay alert for a possible tornado, and if you spot one, go at once into a basement or a small central room in a sturdy structure.

Source: National Weather Service, Mount Holly, New Jersey, November 12, 2026.