General weather pattern remains the same

Issued: Monday, July 20, 2015 – Covering: July 22 – July 29, 2015

This map shows the total precipitation across the Prairies during the 60-day period ending on July 6. It’s quite evident just how dry the Prairies have been, with most locations receiving less than 75 mm and large areas of Saskatchewan and Alberta receiving less than 50 mm. Here in Manitoba, thunderstorms across the south and southeast have brought more widespread rains, with amounts pushing well over 200 mm in some areas.

The overall weather pattern doesn’t look like it will change much during this forecast period. We’re currently in a pattern that has a moderate ridge of high pressure over central North America, with this high extending northwards to about the central Prairies. To our east and west are troughs of low pressure. The western trough is constantly spinning off areas of low pressure that then slide overtop of the ridge, bringing with them showers and thunderstorms.

We should see one of these lows track across Manitoba sometime on Thursday, with most of the energy and precipitation moving through northern and central regions. Southern areas also have a chance of seeing some thunderstorms from this low. Temperatures on Wednesday and Thursday will be warm ahead of the low with highs expected to be in the upper 20s to low 30s.

We’ll then see a bit of a cool-down on Friday as cooler air moves in behind the low, but this won’t last long as the upper ridge rebounds back into our region over the weekend. We should see plenty of sunshine over the weekend with highs warming back into the upper 20s by Sunday.

Next week will start off sunny and warm, but a developing area of low pressure to our west will bring increasing clouds with the chance of showers and thunderstorms by Monday evening or Tuesday. This low is currently forecasted to track northeastward into north-central Manitoba on Tuesday and Wednesday. Warm unstable air will precede this system, with cooler air moving back in later in the week once the low moves by.

Usual temperature range for this period:

  • Highs: 21 to 31 C
  • Lows: 8 to 16 C

About the author

Co-operator contributor

Daniel Bezte

Daniel Bezte is a teacher by profession with a BA (Hon.) in geography, specializing in climatology, from the U of W. He operates a computerized weather station near Birds Hill Park.

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