Isolated to scattered severe thunderstorms are possible Wednesday afternoon after a warm and humid day where temperatures approach records, the National Weather Service says.

March 11 high temperature records in the region include: 73 in Allentown, 74 in Philadelphia, 77 in Reading and 72 in Trenton, all recorded in 2021. Record lowest warm temperatures were 44 in Allentown in 2006, 54 in Philadelphia in 1955, 51 in Reading in 1955 and 51 in Trenton in 1955.

A cold front will move through the area Thursday morning and its precursor may spawn the afternoon storms.

“Cannot rule out some half-inch to quarter size hail along with the potential for an isolated tornado,” the morning forecasters discussion said.

The National Weather Service forecast:

Today: Showers likely, with thunderstorms also possible after 2 p.m. Mostly cloudy, with a high near 77. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4 a.m. Low around 46. South wind around 15 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Showers likely, mainly before 8 a.m. Mostly cloudy, with a temperature falling to around 44 by 11 a.m. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Thursday night: Mostly cloudy, then gradually becoming clear, with a low around 31. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Friday: Partly sunny, with a high near 51. Breezy, with a south wind 5 to 10 mph, increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

Friday night: Partly cloudy, with a low around 37.

Saturday: Sunny, with a high near 49.

Saturday night: Mostly cloudy, with a low around 34.