Early week rainfall over Pembina Valley and Red River Valley
On Monday, July 7, the first of several weather disturbances this week delivered a fresh round of rainfall to parts of the Pembina Valley and the Red River Valley, marking the third rainfall event in some communities since Canada Day.
“That may not sound that notable,” explained CMOS Accredited Weathercaster Chris Sumner, “but some places in May and June only had two or three rain events throughout the entire month. After the region was starting to talk about things getting dry, much of Southern Manitoba is now catching up on the moisture deficit we’ve seen since the start of spring.”
The showers on Monday were triggered by a trough of low pressure dipping southeastward from Saskatchewan.
Rainfall totals from Monday, July 7
The following totals are courtesy of the PembinaValleyOnline Rainwatchers and the Manitoba Ag Weather Network:
Winkler (south of the city): 9.6 mm (almost 4/10 of an inch)
Windygates: 9.4 mm
Clearwater: 8.6 mm
Rosenfeld: 7.9 mm
Snowflake: 7.8 mm
Woodmore: 7.5 mm (now at 100 mm, or 4 inches, since July 2)
Cartwright: 7.2 mm (almost 3/10 of an inch)
Elm Creek: 6.9 mm
Reinland: 5.8 mm
Manitou/Brunkild: 5.2 mm
Dominion City: 5.1 mm
Altona: 5.0 mm (2/10 of an inch)
Morris/Steinbach: 2.9 mm
Carman: 2.6 mm
Kane: 2.4 mm
Jordan: 1.6 mm
(25 mm = 1 inch)
More disturbances expected through the week
“Additional systems coming off the Pacific, moving into British Columbia, and then eventually sweeping across the Prairies, are already showing up in the model guidance this week,” said Sumner. “Wednesday evening could bring the next disturbance, which carries a slight risk of severe thunderstorms, but the main risk day for strong storms is shaping up to be Thursday. Warm, humid air will start pushing back into Southern Manitoba today, peaking on Thursday, just in time for a cold front to arrive and tap into that instability, setting the stage for potential storm development. What exactly that setup might look like should become clearer over the next 24 to 36 hours.”
Temperatures on the rise with humidex values climbing
Daytime highs will return to seasonal levels on Tuesday, reaching around 25°C (77°F), but feeling more like 30°C (86°F) with the humidity factored in.
“Wednesday and Thursday will be even warmer,” Sumner added, “with highs near 30°C (86°F) and humidex values climbing into the mid to upper 30s (95–99°F).”
Seasonal averages for early July in this region are 26°C by day (79°F) and 13°C overnight (55°F).
