Philly hit a record high of 83 on Tuesday. Another record is likely Wednesday, then nasty storms.

This week’s warmup was expected — but not a fast-forward to mid-June.

By 4 p.m., the official temperature at Philadelphia International Airport had shot up to 83 degrees, a record for the date, and the normal high for a June 15.

The warmth was borne on winds from the southwest that gusted to near 25 mph late in the afternoon.

The forecast whiff — the highs were supposed to have been in the mid-70s — was the result of computer hiccups that are common this time of year, said Alex Staarmann, a meteorologist with the National Weather Service in Mount Holly.

“The models in the spring when we get these really warm patterns are notoriously low for temperatures,“ Staarmann said, ”so we kind of expected it would over-perform significantly."

It wouldn’t take an over-performance for a record to fall Wednesday. The forecast high of 78 degrees would beat the standing record for a March 11, the 74 degrees set five years ago.

The previous record for a March 10 was 82. (The differences between the old March 10 and 11 records are quirks of the 150-year-old climate record period.)

This is the third-earliest that Philadelphia has recorded an 80-degree reading: It reach 80 on March 8, 2000, and 82 on March 9, 2016.

But faux summer is about to end, possibly dramatically.

A powerful cold front is due to set off strong storms around sunset or later Wednesday night, Staarmann said.

The National Oceanic and Atmospheric Administration’s Storm Prediction Center lists a 15% chance that storms will generate gusts close to 60 mph, with a 2% chance of a tornado in the Philly region.

The severity will be closely related to the timing, Staarmann said. If the storms arrive at, say, 6 or 7 p.m., they could get a boost from daytime heating. Late at night, things will have cooled down.

“The later it comes in, the lower the severe chances will be,” he said. “If it comes in a little earlier, we could have more problems.”

Thursday’s high is expected to be around 60 degrees, but that might happen at 12:01 a.m. Temperatures are due to fall through the day and may reach freezing early Friday.

Highs are expected to be mostly in the 50s during the weekend, but another strong front is due to crash temperatures early next week, with lows possibly in the upper 20s Tuesday morning.

This is known as March.