Last week’s forecast didn’t work out quite as expected. The strong arctic high did build southward, but it remained farther to the west than originally forecast, resulting in more cloud cover. While some areas did see some light frost late last week, the extra clouds kept most places a little warmer at night and a little cooler during the day.
For this forecast period we have to contend with two different areas of high pressure. The first high is another surface-based arctic high, expected to slide southeastward during the week. This high should take a much more easterly track through northwestern Ontario. At the same time we’ll see an upper ridge of high pressure building to our west try to move eastward. It will be a tough call as to which high will have the biggest influence on our weather.
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It now looks like we’ll see a mix of sun and clouds from Wednesday to Friday as cold air remains in place in the upper atmosphere. Temperatures will slowly warm as the week goes on, with highs expected to be in the low 20s and overnight lows around the 5 C mark. We could see a bit more clouds along with the odd shower on Friday as a weak low slides through.
Over the weekend and into the first part of next week the western upper ridge should finally move in, bringing mainly sunny skies along with high temperatures in the low to mid-20s. Beyond this, the weather models show a fairly strong area of low pressure moving across the northern Prairies. This low will likely drag a cold front across central and southern Manitoba sometime on Wednesday, bringing a short shot of cooler air.
Usual temperature range for this period: Highs, 12 to 22 C; lows, 1 to 9 C.
