The weather roller coaster is about to head upward again, but not before sending the mercury toward freezing once more.

The National Weather Service has issued a freeze warning for Tuesday morning as an unseasonably cold Canadian air mass settled across the Southeast this morning. The high pressure system will drift very slowly east through Wednesday.

The lows are forecast to reach 29 to 32 degrees Tuesday morning, and widespread frost can be expected in rural areas north of a line from Hamilton to Macon to Louisville with patchy frost in more populated urban areas.

The good news is that warmer weather is on the way for Troup County. The forecast calls for a high near 70 Tuesday through Friday, with lows in the mid-30s Tuesday night and 50s Wednesday through Friday.

Normal extremes for this time of year are 73 and 47.

There’s a chance of rain Thursday and Friday.