It is not uncommon for temperature swings to be common in the Fall, when summer is transitioning to winter. However, this looks to be the first widespread chill of the late fall season. After many areas have had their first hard freeze, this event could bring devastation to plants unprepared for such cold temperatures.
Let's remind ourselves that the above image is an average of the GFS Ensembles. But what is the GFS itself saying?
While we have already had to get out our heavy jackets this season, make sure you are prepared: This wil be the first of many cold snaps across the nation, not just in one region. Get those plants prepared for next week. I wouldn't be surprised to see flakes fly in the Plains if this forecast verifies.