***Watch WISN 12 News at 5, 6, & 10 p.m. for the latest weather information!***
Thank you for stopping by the Weather Watch 12 blog! After a 2 day break from the heat and humidity, it will surge back in this weekend. In this entry we will discuss the next round of soupy air and also talk about numerous rain chances in the forecast.
First, a few spotty showers popped up as a weak disturbance neared southeast Wisconsin late Friday. The showers were isolated, but enough to dampen a few plans and put some frowns on those attending the Wisconsin State Fair. Since these showers were diurnally driven(they need the sun’s energy to survice) they quickly fade once the sun sets. Below is a visible satellite image from late Friday…I always like to these images are worth a 1000 words!
What’s cool about the image above is that you can tell the upper level winds were out of the northwest. That is because the clouds were aligned from northwest to southeast. The ‘thicker’ clouds were in Milwaukee…and those contained the isolated showers.
Now the focus for the weekend will be two fold, more heat and humidity, and rain chances. Let’s start with the heat and humidity. Saturday should see highs top out in the mid-80s with just a slight increase in humidity, dew points will climb into the mid-60s. By Sunday, much warmer and more humid air will surge in. This will mean highs in the upper 80s and dew points around 75 degrees!
Below is the dew point forecast for late Sunday. Notice the 75 degree dew points moving into southeast Wisconsin.
Also on Sunday, a front will be near the region, this along with heat and plenty of moisture could lead to showers and thunderstorms. Any rain on Sunday should occur after 2 or 3 p.m. Some of the storms may be strong to severe…so we’ll keep a close eye on later Sunday. Remember, whenever severe weather strikes day or night, you can tune to WISN 12 to get an update on the severe weather.
Now, which day will be the most miserable with the highest heat indices? Below is the 500mb forecast map from the 12Z GFS. This is valid for Tuesday, which I think will be the hottest day across much of the Midwest, and here in Milwaukee highs should touch 90 degrees, with a heat index of 95-100 degrees.
Make sure to watch WISN 12 News for the latest on the heat and humidity, and for live radar updates!
Have a great weekend!