Current Conditions at Sanborn Field

Tonight - Mainly clear. Low:  12-16.

Tuesday - Mostly sunny. High: 28-32.

Tuesday Night -  Clouds increasing towards sunrise. Low: 18-22.

Wednesday - Increasing clouds. High: 38-42.

Thursday- Mostly cloudy. High: 43-47.

 

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Discussion:
After dropping 1-2" of sleet and snow on the Columbia area, with gusts over 30 mph, our small, compact cyclone has scooted off to the north and east. After Monday's breezy conditions, temperatures will be very chilly tonight as the skies gradually become clear as winds are expected to lighten up. Heading into Tuesday, a high pressure system will be over our area as clear skies dominate throughout the morning towards nighttime. Winds will still be weak. Clouds will return early Wednesday morning with some clearing throughout the day. Much of our local snow will melt Tuesday into Wednesday as temperatures begin to climb due to a southerly wind. Clouds will continue to into the day Thursday.

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Forecasters: Dahaner, Johnston, Brown, Hirsch and Market
Issued: 4:45 p.m., November 26, 2018

Technical Discussion (The nerdy stuff we are discussing in class!)
The low pressure system that brought us snow yesterday and cooler temperatures has moved to our northeast. Tonight we could come close to KCOU record low of 11F set in 1955. From Monday 20UTC to Tuesday 06UTC wind chills are likely to be single digits. Kept temperatures for Tuesday at and below freezing due to northerly wind reinforcing the cold air. The winds switch to the south on Wednesday, leading to a more WAA regime before becoming more westerly on Thursday.

A ridge located near Idaho and the four corners move into our area providing mostly clear skies through Tuesday night. According to GFS/NAM 700RH we expect clouds to increase between 08 to 11UTC Wednesday. The clouds Wednesday and Thursday will have periods where they are more/less abundant. There is a small chance of light precipitation possible Thursday Night that future forecast shifts will need to look at.