In what may be some of the final severe thunderstorm warnings of the season, parts of Southern Manitoba saw stormy weather late Monday afternoon and into the evening on Labour Day.
CMOS Accredited Weathercaster Chris Sumner says Environment Canada had warnings in place for about half a dozen municipalities at one point.
“We had just enough instability in the atmosphere Monday for a strong cold front sweeping through to provide the trigger to kick off a line of storms, that at one point, stretched from east of Steinbach southwestward to west of Morden,” said Sumner. “That cold front also brought an end to a stretch of unseasonably warm temperatures for September Long Weekend. Daytime highs Friday through Monday flirted with 30 degrees, which is seven to eight degrees above the average of 22 degrees for the start of the month.”
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Sumner adds the strongest cell developed in the Lowe Farm and Kane area.
“Not only did this particular storm drop a significant amount of rain, as seen in the total below, it also packed gusty winds.”
Peak wind gusts during the storm system included:
- Dominion City – 80 km/h
- Brunkild – 73 km/h
- Kane – 68 km/h
- Austin – 62 km/h
- Holland – 61 km/h
- Portage la Prairie - 46 km/h
Rainfall totals for Monday, September 1st:
- Kane – 60.4 mm (2.38 in)
- Dominion City – 27.2 mm (1.07 in)
- Snowflake – 21.0 mm (0.83 in)
- Steinbach – 13.6 mm (0.54 in)
- Morris – 11.4 mm (0.45 in)
- Neepawa – 9.6 mm (0.38 in)
- Carman – 8.4 mm (0.33 in)
- Portage la Prairie – 5.6 mm (0.22 in)
- Elm Creek – 5.4 mm (0.21 in)
- Stonewall – 5.3 mm (0.21 in)
- Austin – 4.3 mm (0.17 in)
- Gladstone – 4.1 mm (0.16 in)
- Carberry – 1.0 mm (0.04 in)
- Treherne – 0.7 mm (0.03 in)
Looking ahead, Sumner notes much cooler weather is on tap for the Back-to-School week.
“Daytime highs will continue to slide lower Tuesday and Wednesday, with Thursday looking to be the coolest day of the week, and also potentially the next opportunity for more precipitation. A low coming out of Alberta and crossing Saskatchewan and Manitoba may bring another round of rainfall then.”
Conditions are expected to rebound to seasonal levels after that, with sunshine forecast for the first weekend of September.
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