Blustery Weekend & Wisconsin Fall Colors

***Watch WISN 12 News at 5, 6, & 10 p.m. for the updated weekend forecast!***

Thank you for stopping by the Weather Watch 12 Blog!  The first day of October arrived with high temperatures in the 70s!  Last October, there was NOT ONE 70 degree high all month!  As we have been discussing this week, much colder weather is in store for the weekend. 

In this blog entry we will breakdown what’s ahead for the next 48 hours.  Also, look at a map of the Fall foliage across the state and why the colors should be spectacular this year!

Let’s start by looking at when the cold front moved through Milwaukee, and where the really chilly air is located.  Between 2-3 p.m. on Friday afternoon, the winds turned to the northwest in Milwaukee, this signaled the cold front was moving through.  However, if you were outside you probably didn’t notice a change.  Why?  The cold air was lagging behind the front by about 150 miles or so.

Below is the surface map at 2:43 p.m. Friday.  Notice that Milwaukee was at 72 degrees, while areas along the Wisconsin and Michigan border in the U.P. were sitting at a cold 40 degrees!  Just click on the image to enlarge.

The cold front accelerate and race by our area this evening.  That is when cold air, rain showers, and plenty of wind arrive for the start of the weekend.  The threat for rain will mainly be Friday evening and into early Saturday.  Once the main storm pushes east, any threat for rain showers would be due to lake effect, keeping them mainly in lake shore counties.

Below is the surface forecast map for Saturday at 1 p.m.  Notice the green line near the lake…that marks the area that could see a few lake effect showers.  Also, the isobars, lines connecting area of equal pressure.  Those lines are pretty close together, meaning lots of wind on Saturday.  Wind gusts will likely top 30 mph.  Just click to enlarge.

As the high pressure area drifts closer to southeast Wisconsin on Saturday Night, skies will begin to clear inland, and winds will also ease up.  This means that frost will be likely away from Lake Michigan to start off Sunday morning.  As of this writing no Frost Advisories are in place for the weekend, but that will likely change.  So make sure to watch WISN 12 News for the latest.

Below is the forecast temperature map from the NAM computer model.  This is valid at 7 a.m. Sunday morning.  Notice the pocket of temperatures in south central Wisconsin of 25 to 30 degrees!  I think in our area locations west of Mequon, Wauwatosa, Oak Creek, and Salem stand the best chance of seeing frost to start Sunday morning.

With the colder weather and shorter days, the leaves are beginning to quickly change color here in southeast Wisconsin.

The color map below is courtesy of  It is updated frequently, so check there before heading out leaf peeping for the weekend.  You can tell by driving around Ozaukee and Milwaukee counties, but the color has blossomed in the past few days and right now those 2 counties are at 50-75% of peak color!

Make sure to watch WISN 12 News for the latest on rain showers, cold, and the frost potential over the next 48 hours!

Have a great weekend!

Jeremy Nelson


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