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This post was written by Schnack on January 15, 2013
It was a record setting cold couple of days.
Click here to see a post I made in 2009 about the records.
The charts below show a comparison from record cold 2009 to the forecast for Monday.
The maps below are surface maps. One of the maps is from January 15, 2009. There is a large 1044 mb high coming straight out of Canada and centered over the Midwest. The other map below is the HPC forecast map for Monday morning showing a 1044 mb high a little farther west than the one in 2009.
The map below is the 500 mb chart for 2009 and the forecast for Monday (2013). There was a big ridge of high pressure in 2009 along the west coast while there was a deep trough over eastern Canada and extending south across the Great Lakes. The other 500 mb map (Monday 2013) shows a similar configuration.
Snow makes a big difference when it comes to temperatures…especially low temperatures. In 2009 there was a lot of snow across all of Iowa. That helped the lows to drop as low as they did. This year there is very little snow across Iowa and in many locations there is now snow on the ground.
The low temperatures coming up in the next seven days are not expected to as cold as 2009 but it will be COLD.
Posted under Winter Weather
UPDATED at 3:30 PM
Tonight: Mostly clear and breezy. Low: 18-20. Wind: SW 10-20 mph.
Wednesday: Mostly cloudy and breezy. High: 35-40. Wind: 10-20 mph.
Wednesday Night: Partly cloudy. Low: 15-20. Wind: NW 10-15 mph.
Thursday: Partly cloudy. High: upper 20s.
Friday: Partly cloudy. High: near 40.
Saturday: Partly cloudy and windy (NW 15-25 mph). High: upper 30s.
Sunday: Party cloudy and colder. High: upper teens.
Monday: Partly cloudy and cold. High: near 10.
Tuesday: Partly cloudy and cold. High: near 10.
We are tracking the cold air in Canada and waiting for it to move south this weekend. Take a look at the morning low temperatures in central Canada this morning. The coldest temperatures were around 40 below zero. This cold air will be coming south this weekend, but moderating a little.
In the mean time, the low temperatures in eastern Iowa were balmy compared to our friend up north.
A warm front is forecast to push through eastern Iowa Wednesday producing a mostly cloudy sky. In the morning, ahead of the front, there may be a few flurries in northeast Iowa and southwest Wisconsin. The front will weaken as it crosses the region with warmer afternoon highs. Wednesday night a cold front will drift south across Iowa with colder temperatures for Thursday bringing high temperatures back to normal for this time of year. Here is the HPC forecast position of the cold front Wednesday evening.
Friday will be our last surge of mild air as high temperatures will reach the upper 30s and low 40s.
The well advertised Arctic front is forecast to move south across Iowa Saturday with morning highs in the upper 30s. Expect falling temperatures in the afternoon behind the front. The wind will also increase from the northwest add an additional chill into the air. Here is the forecast position of the cold front Saturday morning.
A large and cold area of high pressure will be coming south behind the front. High temperatures here in eastern Iowa will be struggling to reach 10 Monday and Tuesday. Morning lows will be around 5 below zero. The wind at 10-15 mph will push wind chills well below zero Sunday through at least the middle of next week.
Other than the cold weather in the forecast there are no real precipitation chances through the middle of next week.
Posted under Forecast Discussion
1963: Bitterly cold air settled across Iowa sending temperatures plummeting to record levels. Reported low temperatures included -31 F at Charles City and Osage, -34 F at New Hampton, -35 F at Cresco, -39 F at Decorah, and -40 F at Saratoga in Howard County, a level which was only reached a handful of times in Iowa during the 20th century.
|This Day in National/World Weather History …|
Posted under Weather History