Wednesday, August 12, 2020

Hot humid weather returns with the threat for severe thunderstorms and heavy rain.

 Southern Manitoba will be entering another period of hot and unsettled weather , as multiple areas of low pressure will move into the region bringing with it a area of hotter temperatures and large amounts of gulf moisture .




Southern Manitoba will experience a risk for severe weather over the coming days as multiple areas of low pressure move through the region. 

Wednesday a approaching warm front will come into southeastern regions of Saskatchewan, it should be a fairly nice day with fairly sunny skies and a mix of sun and cloud , high temperatures will be soaring into the high 20’s to low 30’s. Humidex values will be in the 35 to 40C Range. A high of 31C is forecast for Winnipeg and a high of 30C is forecast for Brandon . Heading into the late afternoon southern Manitoba will experience a risk for severe thunderstorms with over 2,000J/KG CAPE as a warm front tracks into the region, there will be a risk for gusts to 110km/h, 3-5cm hail up to golfball size , and the potential for a tornado or 2 in the initial stages of development. It looks possible that a squall line of storms will form south of the border and in southwestern Manitoba which will likely move east northeast into the evening and overnight impacting areas of southern Manitoba some storms will come in from NW North Dakota as well. 


Wednesday Night

Heading into the overnight southern Manitoba will experience a risk for severe thunderstorms as mentioned above. After storms blow through, overnight lows will drop into the high teens to low 20’s. A low of 21C is expected for Brandon and a low of 22C is expected for Winnipeg it will also be quite humid. 

Thursday 

The forecast gets extremely complicated, there will be a risk for severe thunderstorms on the day with a risk for potential flash flooding if storms form in southern Manitoba particularly eastern regions , as the front looks to stall over southern regions of Manitoba on Thursday. High temperatures on Thursday could reach the mid to high 20’s with a chance of surpassing 30C in some areas.  A high temperature of 25C is expected for Winnipeg and a high of 26C for Brandon. If the low pressure centre moves further north into southern regions of Manitoba rather than North Dakota there will be a chance of temperatures surpassing 30C once again. 

Thursday night expect storms to clear and a possible resurgence of storms in North Dakota that may drift north overnight into Manitoba by the morning hours . They will likely be severe with wind gusts up to 100km/h and large hail. Overnight lows will drop into the mid to high teens, a low of 19C is forecast for Winnipeg and a low of 15C for Brandon. 

Friday the low pressure system and front will move into  Northwestern Ontario by late afternoon with the threat for severe storms in the regions of Southeastern Manitoba into the afternoon and early evening before moving into Ontario. High temperatures will likely reach the mid to high 20’s. A high of 25C is forecast for Brandon , and a high of 25C is forecast for Winnipeg . 

The Weekend 

Looks like the return of more seasonable temperatures with lingering showers and storms on Saturday morning as a trough of low pressure moves in behind the cold front. Then generally sunny conditions should be on the way for the afternoon Saturday as well as Sunday. High temperatures in the low to mid to 20’s expected.





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