Monday, March 28, 2022

Low Pressure system to impact southern Manitoba, cool weather continues.

 Another developing low pressure system is expected to impact southern sections of Manitoba as well as North Dakota over the next 24 to 48 hours, unfortunately a lot of the precipitation will fall as snow, as river levels in the Winnipeg area are getting close to flood level, but remain below at the moment and properties are currently at risk for flooding along Winnipeg rivers. https://winnipeg.ctvnews.ca/winnipeg-warns-some-properties-may-be-at-risk-of-river-flooding-1.5837981 Regardless read on to find out about the timing, impacts and precipitation amounts as well as how our temperatures will be affected by this system. 

Tonight: The low pressure system is forecast to start moving into  our area overnight into Tuesday with an initial batch of freezing rain and mixed precipitation moving through western Manitoba and the parklands regions during the early morning hours. Tonight temperatures will drop to the low to mid minus single digits (-1C to -6C) under cloudy skies. 

Tuesday: The area of precipitation that moves into the parklands during the morning will move into the interlakes regions by the morning with a intensification of the system by the early to mid afternoon with a transition over to snowfall during the afternoon hours. A brief period of showers is forecast over the red river valley shortly after lunch. Then Snow will fill in from the North to the south throughout the afternoon with a general 5-10cm of snow expected , most of it will melt on contact as temperatures remain mild during Tuesday. There is the exception of areas along the border along highway 75 where showers and a risk for freezing rain or ice pellets will exist shortly after 2pm-5pm before a full transition over to snow by the early evening hours. Temperatures during Tuesday afternoon will rise into the low single digits to around zero degrees celcius (0 to 2C), with areas north of the trans Canada highway seeing high temperatures in the low minus single digits (-1C to -4C). 

Tuesday Night: I’m still expecting the snow to fall in the south central and south eastern portion of Manitoba but it will weaken towards the midnight hours in the south central with some areas in the south east seeing snow and flurries overnight into Wednesday. When all is said and done a general 2-4 extra cm of snow is possible. Winds will begin to increase out of the northwest as this system moves off into Ontario, by overnight into the morning hours winds will be 50 to 60km/h gusting to 70km/h possibly. Overnight low temperatures will drop into the low to mid minus single digits (-2C to -6C). 

Wednesday: The low pressure system will move off into the Lake Superior region leaving residual flurries in the morning and early afternoon hours, as a northerly flow pulls in. Cloudy skies will be in place during the day with sunny skies as well as clearing coming in by the late afternoon and early evening Temperatures surprisingly will not cool off much, with a large area seeing highs in the low to mid minus single digits (-1C to -5C) that’s good news!!

Wednesday Night: Clearer skies are forecast as a weak high pressure system slides through ,, some cloud is possible in the overnight in the southwest. Temperatures won’t drop much at all, with much of the area seeing lows in the low to mid minus single digits (-2 to -8C), with the warmer values occurring in the southeast. 

Second half of the week: Calm weather continues, a clipper system might swing through on Thursday or Friday with minimal precipitation expected. Temperatures will remain mild with day time highs in the low minus single digits on Thursday and lows in the high minus single digits , and Friday where high temperatures will be in the low single digits and low minus single digits for overnight lows. Signs are that this pattern of warmth continues into the weekend, we will keep you updated on any new information by Friday. 


-Mike McGregor 

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