Wisconsin Weather Update for February 16, 2009.

By: HaleStorm , 1:34 PM GMT on February 16, 2009

Good Monday morning!

Weather Synopsis
After a weekend of scattered snow showers developing 1" of snowfall or less and temperatures near or slightly below normal, we're looking at one more day of near-normal temperatures and calm weather thanks to a large area of high pressure just to our south. However, things are going to get a little crazy tomorrow night through Wednesday night. I was going to write up a nice recap of what's going to happen, but the National Weather Service out of Green Bay did a nice writeup last night, so I'm just going to include that below. Long story short, get your snow blowers ready as a fresh 6+" of snow could be on your driveway by Thursday morning! I expect the National Weather Service to issue a Winter Storm Warning for Tuesday night through Wednesday night later today or tonight.

Important Weather Statement: (Source: National Weather Service)
Fox Cities:
...Prolonged period of snow followed by windy and cold weather...

Low pressure is expected to develop across the Central Plains on
Tuesday...then move across Illinois into the eastern Great Lakes
Wednesday. This storm track will bring a prolonged period of light
to moderate snow to much of the area...beginning Tuesday night and
continuing into Wednesday night. The snow may linger into
Thursday morning across northeast Wisconsin.

At this time...the exact track of the low pressure system is
still uncertain which will have a significant impact on snowfall
totals across the area. Snow totals over 6 inches are possible
between Tuesday night and Thursday morning. The combination of the
fresh snowfall and increasing northerly winds on Wednesday into
Wednesday night will cause blowing and drifting of the new snow.
Travel conditions across the region will deteriorate Tuesday night
into Wednesday with hazardous travel conditions expected into
Wednesday night. If traveling by air...expect delays at regional

Arctic air will invade the region by Wednesday night. The
combination of the winds and cold temperatures will drive
wind chills readings to 20 below across north central Wisconsin
Thursday morning.

Today’s Forecast Grade: B

Wisconsin Forecast:
Today: Partly cloudy with increasing clouds late. High of 30 central, lower 30s south.

Raw Model Data: (combined numerical output range from four different weather models)
Appleton: Highs 26-31.
Madison: Highs 28-35.
Waukesha: Highs 27-33.

Tonight: Mostly cloudy and breezy, lows near 20.

Tomorrow: Mostly cloudy and breezy with light snow developing later in the day. Precipitation could fall as light rain or a mix initially tomorrow afternoon. Windy with snow likely tomorrow night. There may be 2-3" on the ground by the time you wake up Wednesday morning. Highs low to mid- 30s central, mid- to upper 30s south. Chance of precip during the day tomorrow 30%. Chance of measurable snow tomorrow night 80%.

Wednesday: Cloudy and windy with snow likely. Snow remains likely Wednesday night. Highs 30-35. Looks like another 2-4" during the day on Wednesday and 1-2" of additional snow Wednesday night, bringing my snow total estimate to 5-9". Chance of measurable snow 80%. The only things that could lessen totals are the final track of the storm changing and eventual moisture content within the storm. A couple weather models are suggesting a little less moisture with the storm, meaning you could drop those snow totals in half, but the GFS is suggesting more moisture and higher totals, which I have used in my estimates here.

Thursday: Cloudy with scattered light snow showers early, then decreasing clouds later in the day. Windy and much colder, highs 18-23.

Friday: Cloudy with a new round of light snow showers. As of now it looks like less than 1" as the main storm just misses us to the south. Highs 21-26. Chance of measurable snow 30%.

This Weekend:
Saturday: Cloudy and cold with light snow showers or flurries. Highs 17-24. Chance of measurable snow 25%.

Sunday: Partly cloudy, highs 21-28.

Other City Forecasts:

Today and Tomorrow in Minneapolis/St. Paul, Minnesota: Flurries today with a better chance of snow late tomorrow. Highs low to mid- 30s.

Today and Tomorrow in Anna, Illinois: Some sunshine today, mostly cloudy with rain developing late tomorrow. Highs lower 40s today, near 50 tomorrow.

Today and Tomorrow in League City and Pearland, Texas: Scattered showers with isolated thunderstorms this afternoon through Wednesday. Highs near 60 today, upper 60s tomorrow.

Today and Tomorrow in Hilton Head Island, South Carolina: Decreasing clouds today, sunshine tomorrow, highs mid- to upper 50s.

Today and Tomorrow in Las Vegas, Nevada: Mostly cloudy with rain showers likely. Highs mid- 50s.

Today and Tomorrow in Davenport, Florida: Partly cloudy, highs low to mid- 70s.

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About HaleStorm

Atmospheric and Oceanic Sciences degree from UW-Madison: 1998. Former broadcast Meteorologist for NewsRadio 1310 WIBA in Madison. NWS Storm Spotter.

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