Happy holiday weekend from weather watch 12. It’s a beautiful Saturday, but certainly feels like fall. There is a crispness to the air with dew points in the 40s and a strong northwesterly breeze all day. Temperatures stayed in the 60s most of the day.
I snapped this photo on my way into work. The above picture is a perfect example of cumulus humilis clouds. In easier terms, fair-weather cumulus. These clouds formed because of the sunny skies warming the land creating rising air. These clouds are not amounting to anything because of the very dry air at the surface and aloft. The air aloft is very chilly and that promotes lift to create the clouds. Take a look at the visible satellite.
Notice the puffy appearance of the clouds across Wisconsin. You can actually see the direction of the wind with the formation of the clouds.
Tonight will bring our coldest night since the middle of May. Lows will be in the 40s in all locations except those areas right next to Lake Michigan.
Look at the current surface features with the very low dew points in the low 40s. With the winds dying down tonight, clear skies, and dry air our temps will drop quickly. A frost advisory is in effect for northern Minnesota and parts of the Upper Peninsula of Michigan.
Sunday will bring a beautiful day. It will warm up nicely with sunshine and southerly winds. Highs will be back in the middle 70s. Labor Day will be even warmer with a strong southwesterly wind. Highs should be in the low to mid 80s. Have a great weekend.