The remarkable February warm spell will continue in Sarnia-Lambton through the remainder of the work week.
Environment Canada meteorologist Geoff Coulson says an air mass flow from the American Southwest and Deep South has locked in.
"We saw a dramatic shift in the flow pattern Friday of last week," says Coulson. "This pattern is actually locked in, which doesn't tend to happen all that often. We see a mild day here and there in the month of February, that's certainly not all that unusual, but stringing together a number of them in a row, certainly doesn't happen all that often."
Coulson says breaking a nearly 70-year record high by almost six degrees, as was the case last Saturday when the temperature peaked at 18.9 C (66 F), is unusual.
"We're using words like shattered, annihilated, smashed. We had to think of some description that was more appropriate than just breaking the record by half a degree or one degree," he says. "Certainly that doesn't happen very often and the record that it broke was set all the way back in 1949, so a record of fairly long standing."
It's likely Wednesday's standing record of 11.2 C (52 F) set in 1984 will also be shattered with a high of 17 C (63 F) forecast.
Highs in the double digits in Sarnia are expected through Friday.