A potent cold front will be pushing across southern Manitoba from the north-northwest this afternoon. Strong to severe thunderstorms are expected to develop and organise along this front beginning this morning in the Parklands and northern Interlake. By the time the front reaches the RRV mid afternoon to early evening, a line of thunderstorms is expected. Damaging winds will be the main concern as a result for us here. I think the chance that Winnipeg will get some form of thunder is high.
Behind the front, skies will clear for tonight before things cloud up again tomorrow morning. Due to little sunshine in the afternoon, highs are only expected to be around 15-16°C in Winnipeg. With strong northwest winds up to 40 km/h at times, it will feel more like October than July. A few showers are also possible later in the afternoon and evening.
This cool down arrives as the jet stream pattern highly amplifies again in the next few days as seen in the model image below. Generally unseasonably cool conditions are expected in central and eastern parts of North America in the next few days. In contrast, the west will be cooking. Highs well in the 30's and possibly approaching 40°C are expected in the Interior of BC in the next few days.
|Highly amplified pattern returning for a visit. Deep trough over eastern North America, large ridge in the west. Map was retrieved using AWM's Model Viewer|
Thankfully, the extreme cool down looks brief. Temperatures will start warming up beginning mid week as a southerly flow returns. We should reach low 20's on Tuesday and mid 20's on Wednesday. Even warmer air is possible on Thursday before things might cool down a bit to end the week. Still far away so things could change a little bit.