The first full day of astronomical summer (Monday), felt like autumn instead! A blast of air rolling in from Canada is keeping temperatures about 15 degrees below normal. With partly cloudy skies and diminishing winds Monday night, the lows could reach the low 40s to upper 30s generally. We can’t rule out some mid 30s in some of the cold spots in the area.
Thankfully, this chilly snap is very short-lived. In fact, by Tuesday afternoon the highs should rebound to near 70 degrees. A weak disturbance moving across the region could produce a few spotty brief showers, mainly north and east of Marathon County. Winds will be from the west around 10 mph.
Wednesday will continue the warm up with partly sunny skies and lows around 50 along with highs in the upper 70s to near 80. In other words, we will basically be back to normal. A front slowing moving in from the Plains could bring some rounds of showers and thunderstorms to the western half of the state late Wednesday night and the rest of the region Thursday. Some places could get generous rainfall over 0.50 inch again. It will be warm and more humid Thursday with lows in the low 60s and highs around the lower 80s.
That front will move into southern Wisconsin Friday, but still be close enough to keep at least a chance of some showers and thunderstorms in the area, with higher chances the further south and east you go. Highs again could reach the upper 70s to near 80 degrees.
Slightly cooler and less humid air will ooze in for the weekend. As such, we expect partly sunny and pleasant conditions with lows in the 50s and highs well into the 70s. There is a slight chance of a shower or thunderstorm on Sunday.
Early next week is generally shaping up pleasant as well with nothing too hot in sight and a decent amount of sunshine.
Pollen Report from Monday morning: Grass moderate
Have a nice evening! Meteorologist Tony Schumacher, 2:35 p.m., 21-June 2021
*On this date in weather history:
1988 - The first full day of summer was a torrid one, with afternoon highs of 100 degrees or above reported from the Northern and Central Plains to the Ohio Valley. Sixty-nine cities in the north central U.S. reported record high temperatures for the date. The high of 110 degrees at Sioux Falls, SD, was an all-time record for that location. Highs of 103 degrees at Des Moines, IA, 102 degrees at Fort Wayne, IN, 109 degrees at Huron, SD, 108 degrees at Sioux City, IA, and 101 degrees at South Bend IN were records for June. (The National Weather Summary)
2005 - A slow-moving thunderstorm dumped up to a foot of hail in southeastern portions of Colorado Springs, Colorado. Snowplows had to be used to clear a route through a major thoroughfare in the city. Heavy rainfall from the storm left up to 4 feet of water in city streets, trapping dozens of motorists (Associated Press).