We're in the throws of the long advertised (MJO driven weather pattern), that features below normal temperatures across the Central Midwest. Early risers will again see frost Tuesday morning from Nebraska to Vermont within the advisories posted below, that does include my northern counties from roughly HWY 30 north.

Conditions like that are pushing the envelope for so late in the season. Most years the average last 32 degree reading ranges from April 5 to April 21st from south to north.

There have been years when the last freezing temperature occurred way back in March. This next graphic shows the earliest and latest 32 degree temperatures for some select cities within my area.

Here's the same data plotted on a county map. (First the earliest date of the last 32)