After a few weeks of less than accurate forecasts, last issue’s forecast was nearly perfect. The western ridge of high pressure did push eastward, bringing sunny, hot and dry weather. The only hitch in the forecast was the slight cooldown last Friday and Saturday, which was the result of a cold front sliding southward behind an area of low pressure that was tracking across the northern Prairies.
This cold front temporarily flattened the upper ridge before it rebounded, bringing a return to heat over the long weekend and into the first half of this week.
It looks like the upper ridge will continue to bring sunny skies and hot temperatures until at least Friday. Then weather models are showing a developing area of low pressure to our west, which will lift quickly to the northeast. This will bring strong southerly winds to southern and central Manitoba, with only a slight chance of a shower or thundershower.
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A weak cold front behind this low will bring cool temperatures on Saturday, with daytime highs dropping back into the low 20s. By Sunday, a second area of low pressure is forecasted to track through the central Prairies. This low will help bump temperatures back into the mid-20s as strong southerly winds develop again.
As this second low slides by, we will again see a cold front drop southward, bringing a return to more seasonal temperatures beginning around Sept. 12. Looking further ahead, the weather models hint at a quick shot of some cold air for the weekend of Sept. 17, with northwestern regions possibly seeing the first frost of the year. As usual, this is a long way off and a lot can change between now and then.
Usual temperature range for this period: highs, 15 to 25 C; lows, 4 to 12 C.
