Updated Tuesday, July 19 at 7:55 p.m .: Environment Canada has completed all severe storm watches in southern Manitoba. Be sure to check out PembinaValleyOnline on Wednesday mornings for Rainwatcher reports from across the region.
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Updated Tuesday, July 19 at 4:15 pm – Environment Canada has reissued a severe storm alert for the Morden, Winkler, Altona and Morris areas as storms have begun to redevelop this afternoon. The threat of storms will subside early this evening, but before that, scattered storms can reach severe limits in these regions.
Severe storm monitoring continues in all regions east of the Red River to the Ontario border.
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It was a stormy start on Tuesday, with thunderstorms and lightning that woke many in the Pembina and Roig river valleys.
“Shortly before 5 a.m., several tornado warnings were issued after Environment Canada meteorologists noticed indications on RADAR suggesting that a tornado could occur or will occur soon in these regions,” said meteorologist Chris Sumner. CMOS accredited.
All tornado warnings ended before 6 a.m. and at one point included the municipality of Rhineland, as well as the RMs of Montcalm, Morris and De Salaberry.
Meanwhile, around 6:50 a.m. Tuesday, all warnings of severe storms in the Red River Valley ended. Severe storm monitoring remains in place in most of southeastern Manitoba from the Red River to the Ontario border, including the Emerson, Morris, Vita and Sprague regions.
“The reason Watch is still in place is that the initial activity we saw this morning, think of it as the edge of that low top level that’s just full of moisture,” Sumner noted. “We are now seeing some sunburn in the areas south of Highway Number One, so daytime heating will generate instability throughout the day. As the cold front associated with this low starts to slide towards south and cut into this warm, humid air. too, it will act as the trigger for a potentially more severe storm development later this morning or afternoon. “
Sumner added, even if we do not see severe storm activity, it is very likely that in southern Manitoba, from the Saskatchewan border to the Ontario border, there will be additional rain and non-severe storm activity in sometime today.
The following rainfall totals are courtesy of PembinaValleyOnline Rainwatchers and Manitoba Ag Weather Network, and reflect the amounts received during Tuesday morning until storm activity moved across the region:
Two miles south of Morden – 45 mm (1.8 inches) Somerset – 44 mm (1.75 inches) Morris / Winkler (in town) – 30 mm (about 1.2 inches) north of Horndean, Plum Coulee – 25 mm (1 inch) Winkler (south of town) – 23.9 mm Carman – 17.5 mm (7 / 10th) Gnadenthal – 10 mm (4 / 10th) Altona – 7.5 mm (3 / 10th)
25 mm = 1 inch