Arctic Air is Knocking on the Door

UPDATED at 4:10 PM

Tonight: Partly cloudy. Low: 27-31. Wind: SW 5-15 mph.

Saturday: Mostly sunny and windy.  High: 41-47 around noon….falling temps in the PM. Wind: W/NW 15-30 mph…gusts to 45 mph

Saturday Night: Increasing clouds, windy and colder. Low: 3-7. Wind: NW 15-25 mph. Wind Chill: 10-25 below zero.

Sunday: Mostly cloudy and cold with a 20% chance of light snow/flurries. High: teens.

Monday: Partly cloudy and very cold. High: single digits.

Tuesday: Mostly cloudy and very cold. High: single digits.

Wednesday: Partly cloudy. High: low 20s.

Thursday: Mostly cloudy with a 20% chance of rain/snow. High: low 30s.

Friday: Mostly cloudy and windy (NW 15-25 mph). High: mid 20s.

The wind was strong today from the southwest with gusts to 40 mph. High temperatures were in the upper 40s and low 50s. A few locations came a few degrees shy of records. I will post the graphic with the numbers here later this afternoon after the official highs are released.

Graphic coming

There is going to be such a big change in temperature from this afternoon to Saturday evening. We are tracking a cold front and it is still forecast to cross Iowa from north to south during the early-mid afternoon hours. Here is the forecast position of the cold front at noon Saturday.

Once the front moves through, early-mid afternoon, the temperatures will drop quickly. Here is an example how fast the temperatures will drop for Waterloo. All other locations will see the temperatures drop that fast as well.

From when the frotn crosses your area through midnight Saturday the wind will be strong from the W/NW at 15-30 mph with gusts as high as 45 mph. Keep in mind the wind will be strong as the temperatures drop.

Sunday will be much colder with a slight chance of a light snow shower or flurries. No accumulation is expected. Monday and Tuesday will be the coldest days of the next seven with highs only in the single digits. Monday morning and Tuesday morning will have lows below zero and wind chills as cold as 15-25 below zero. I would expect the National Weather Service will be issuing a Wind Chill Advisory for the early part of next week.

If you think it will be cold here take a look at the map below (WSI RPM Model). This shows that the REALLY COLD air will be north of Iowa with temperatures in the 20s below zero.

Our cold weather will only linger through Tuesday. By Wednesday, the high temperatures will warm back into the 20s and low 30s by Thursday. At that time we will be tracking the potential for rain/snow.


Posted under Forecast Discussion

This post was written by Schnack on January 18, 2013

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