The chances for significant snow on Monday in Denver are growing, according to the National Weather Service. Forecasters also warn that a hard freeze is possible early next week as nighttime temperatures drop to 26 degrees.

It’s going to be a dramatic swing: Sunday afternoon will reach temperatures near 74 degrees before a bitterly cold front rolls in.

The storm will start with rain over Denver and the Interstate 25 corridor before transitioning to snow on Sunday night. The snow will continue into Monday morning, and snow or slush may accumulate on the roads.

“Enough snow may accumulate on trees to cause damage,” the NWS reports. Temperatures will get even colder as the storm clears out on Monday night, dropping temperatures well below freezing.

While a lot of details are still up in the air, “we see some decent probabilities showing up for a few inches to accumulate for our Front Range cities,” as Brendan Heberton reports for the always-helpful Weather5280.