Very warm and humid conditions have built in across Wisconsin and the region and they will not be leaving any time soon. The main jet stream is bulging north into Canada preventing any significant cold fronts from working in, at least through early next week.
The weather looks mainly quiet and dry Tuesday night with lows in the mid to upper 60s. Winds will be from the southeast around 5 mph. Wednesday should be partly sunny and muggy with highs in the mid or upper 80s. The heat index could reach the low 90s by afternoon. There is a slight chance of a shower or thunderstorm in the afternoon as well. Winds will be from the southeast around 10 mph.
Thursday looks like almost a carbon copy of Wednesday with a mix of sun and clouds. Lows will be in the mid 60s with highs in the upper 80s. We can't rule out a few isolated showers or t-storms later in the afternoon.
High pressure aloft will sit over our area Friday and Saturday for the 4th of July, bringing quite a bit of sunshine. Lows will remain in the mid 60s with highs around 90 degrees. The heat index could spike to the mid 90s if the humidity stays high enough. Please continue to drink extra water, take frequent breaks from heavy exertion, and go in the shade, air conditioning, and near fans as much as possible to avoid heat related illness. A front approaching late Saturday night brings at least a small chance of showers and thunderstorms at that point.
Sunday will be quite warm and humid with highs well into the 80s. However it should be somewhat cloudier with a 40% chance of showers and thunderstorms as well. The potential of some scattered showers and storms will linger into Monday and Tuesday next week. There will likely be some intervals of sunshine also. It will stay a bit warmer than normal with highs in the mid 80s.
Have a nice evening! Meteorologist Tony Schumacher, 3:30 p.m., 30-June 2020
On this date in weather history:
1942 - The temperature at Portland, OR, hit 102 degrees, an all-time record for that location. (The Weather Channel)
1972 - The entire state of Pennsylvania was declared a disaster area as a result of the catastrophic flooding caused by Hurricane Agnes, which claimed 48 lives, and caused 2.1 billion dollars damage. (The Weather Channel)