Perseids Meteor Shower & A Heat Advisory

***Watch WISN 12 News for the latest weather information!***

Thank you for stopping by the Weather Watch 12 Blog!  Hopefully you are finding a way to beat the heat and humidity.  Milwaukee’s high temperature on Wednesday was 91 degrees!  This was the first high in the 90s in 25 days, and it also tied for the warmest temp of 2010!

We’ll talk more about the heat in a moment, but first let’s start with the annual appearance of the Perseids Meteor Shower.  The Perseids peak August 12-13, and with little cloud cover the next two nights, viewing should be okay.  I don’t think it will be spectacular since we have a lot of haze and humidity in the atmosphere.  This is a meteor shower that typically produces several meteors per minute.

If you plan on viewing, try to look for the constellation Perseus.  The meteors will radiate from this area.  Below is a sky chart to help you out.

As you view meteors the next two nights it will be warm.  Overnight lows will stay in the 70s in many areas.  Daytime highs will soar into the upper 80s and low 90s for much of the area both Thursday and Friday.  On Thursday, a lake breeze will develop, so Milwaukee should stay in the upper 80s for highs.  Inland locations will reach the low 90s, and with dew points in the 70s, heat indices will climb to around 100 degrees during the afternoon.

Both Jefferson and Walworth counties are under a Heat Advisory for Thursday.

Below is the dew point forecast for 1 p.m. on Thursday.  This forecast is from the 12Z NAM computer model.  Notice the red area over southeast Wisconsin, that indicates dew points of 75 degrees!  Just click on the image to enlarge.

By Friday the winds will be more south-southwest and that should cut down on the cooling from Lake Michigan.  So everyone could see highs around 90.  Along with the heat, the focus will be on thunderstorms for later Friday and Friday Night.  Most should hold off until Friday evening or night, and any that form could turn severe.

Below is the severe weather outlook for Friday and Friday Night.  The entire WISN 12 viewing area is under a slight risk of severe weather.  The main threats would be strong winds and heavy rain.

Any storms that do occur would hopefully be out of here by midday Saturday.  This will depend on how fast the cold front moves.  The potential for severe storms is something we will focus on during each weather segment for WISN 12 News…so make sure to tune in at 5, 6, & 10 p.m. for the latest!

Remember you can get more weather info on Twitter at WISN12News and on Facebook at WeatherWatch 12  Make sure to leave me a comment and let me know how you have liked this summer!

Have a great day!

Jeremy Nelson


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