Number Crunching & Weekend Snow

***Watch WISN 12 News at 5, 6, & 10 p.m. for Milwaukee’s most accurate forecast!***

Thank you for stopping by the Weather Watch 12 blog!  In Wisconsin there is a popular saying, “If you don’t like the weather, just wait 5 minutes and it will change”.  That saying will get a lot of play starting Friday and continuing this weekend!  Goodbye are highs in the 70s, and returning are conditions more typical of late March or early April.

Before we discuss the chances of rain, snow, and frost this weekend.  Let’s do a little number crunching to show how warm the past 35 days have been.

First, April 2010 in Milwaukee was the second warmest on record.  But even more impressive is the number of days with highs of 70 or warmer.  Below is a look at the the past 5 years and the number of days at or above 70 from April 1 to May 5.

  • 2010  13 days
  • 2009  5 days
  • 2008  5 days
  • 2007  4 days
  • 2006  7 days

I find it incredible that just over 37% of the time, highs have been in the 70s or 80s!  The first 5 days in May all recorded highs of 70 or higher.  I looked back at Milwaukee weather records, and in 1934 the first 6 days of May had highs of 70 or warmer.  Regardless, this May has gotten off to one of the warmest starts in history!

Remember how the blog started…just wait five minutes?  Now let’s discuss a wet storm, snow, and frost possible for Wisconsin.

Beginning early Friday, a chilly rain will spread across southeast Wisconsin.  The showers should taper off by Friday afternoon, as temperatures will be stuck in the upper 40s to low 50s.  Cold air will begin to pour into the region later Friday.  This will change rain over to heavy wet snow in northern Wisconsin.  Any leftover precipitation around Milwaukee could change to flurries or snow showers Friday Night into early Saturday!  No accumulation is expected in this part of the state as of this writing.

Below is the precipitation forecast from our in-house computer model.  This gives Milwaukee around a half inch of rain. 

Now how much of this will be snow?  Below is the snowfall forecast thru Saturday from the same in-house model.  Notice that parts of the U.P. could see 10″ of snow!  Areas around Fond du Lac and Oshkosh may see a dusting on grassy surfaces.

Once the clouds clear and winds ease up, a frost or freeze is possible Sunday morning.  Overnight lows in the 30s are not uncommon during May in southeast Wisconsin.  Here is a look back at the past 5 years, and the date of the last Spring low in the 30s.

  • 2009  May 11  38 degrees
  • 2008  May 19  38 degrees
  • 2007  May 20  39 degrees
  • 2006  May 22  37 degrees
  • 2005  May 12  38 degrees

By Sunday morning Milwaukee will likely drop into the mid-30s, with some inland areas in the upper 20s!

Finally, the results came in Wednesday afternoon from the NWS damage survey in Winnebago county.  The NWS out of Green Bay determined that 2 tornadoes occurred Tuesday evening.  Both were brief, and classified as an EF-0 and EF-1.  A map showing the path of each tornado and its location is below.

For more weather updates, make sure to join us on Facebook at WeatherWatch 12 and also sign up to follow us on Twitter!  Finally, if you post to the comments section of the blog, make sure to sign up to have the blog updates emailed to you directly! 

Have a great day!

Jeremy Nelson


2 Responses

  1. Hey Jeremy!

    I hope the snow stays away! I remember it snowed on a friend’s birthday morning on May 9 in Milwaukee-was in the early 1990’s and we were going to a Brewers game that day. They didn’t cancel the game, but it was the coldest game I had ever been to. Would have been nice to have a retractable roof on County Stadium that day I tell you! It just seems wrong to talk of snow in May. Even in Wisconsin. Stay warm!

    • The coldest baseball game I was ever at was in KC a few years ago with you…flurries at the end of the game! I think you are thinking of May 10, 1990. 3″-10″ of snow around Milwaukee that day! That is also the last measurable May snow in Milwaukee…I guess we are due.


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