Severe thunderstorms and high winds that could cause flooding and power outages are likely Monday in the Lehigh Valley.
The storms could bring heavy rainfall and even tornadoes through late Monday night, according to the National Weather Service in Mount Holly, New Jersey. Storms could begin as early as 2 p.m., but forecasters said they will peak between 5 and 11 p.m.
Lehigh and Northampton counties, as well as neighboring Bucks, Berks, Carbon and Monroe counties, will be under a wind advisory from 2 p.m. until 2 a.m. Winds between 20 and 30 mph, with gusts of up to 50 mph, are possible. Winds could cause power outages as well.
All of Lehigh County and the western half of Northampton County have a 45-59% chance of severe wind, while the eastern portion of Northampton County has a 30-44% chance. The entire Lehigh Valley has a 2-4% chance of a tornado within 25 miles of it.
The strong storm system could bring heavy rainfall that could lead to flash flooding, according to the weather service.
⚠️⛈️🌬️ Severe thunderstorms & strong southerly winds will develop this afternoon & evening. Storms beginning as early as 2 PM, but peaking between 5-11 PM from west to east. Scattered tree damage & power outages possible. Stay weather aware today! #PAwx #NJwx #DEwx #MDwx pic.twitter.com/Sz9fStAIZN
— NWS Mount Holly (@NWS_MountHolly) March 16, 2026
After Monday, temperatures should drop into the 30s and 40s, before reaching into the 50s over the weekend.
Here is the extended forecast from the National Weather Service:
Tuesday: Mostly sunny, with a high near 39. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday: Partly sunny, with a high near 40. Calm wind becoming south around 5 mph in the afternoon.
Thursday: Mostly cloudy, with a high near 48.
Friday: Partly sunny, with a high near 55.
Saturday: A chance of showers. Mostly cloudy, with a high near 55. Chance of precipitation is 30%.
Sunday: A chance of showers. Partly sunny, with a high near 50. Chance of precipitation is 30%.