Sudden Transition to fall weather with Frost

Southern Manitoba can expect a rapid transition over to fall weather as a large area of arctic air builds south.   The weather this week will affect a large majority of the province, bringing the potential for frost and possible record low temperatures. Read on to find out more. 

A cooler than average temperature pattern is expected to start this week , be ready for some frost and the possibility of snow by the inter lakes.  

Monday: Expect a mix of sun and cloud , with more cloud cover along areas of the international border. Showers will likely form and come off the lakes with the north winds,  streaming SE to S. Some of those might enter the red river valley if winds shift to the SE enough . It will also be one of the coldest days of the week, with temperatures cooler than seasonal average. Most of the average day time high temperatures will be in the low double digits (10-15C) Winnipeg: A mix of sun and cloud 40% chance of showers 12C. Brandon: A Mix of Sun and Cloud 11C.

Monday Night: Clear weather is expected with a chance for showers and local flurries over the lakes where most of the cloud will be. The reason for flurries is because a cold north wind is expected and colder temperatures above ground level might mix down. Given the clear weather there will be a risk for frost in the SE and frost in the SW as overnight lows will drop into the minus single digits in the SW to the low single digits for the rest of the south  (0 to 5C).  Winnipeg : Partly Cloudy, Risk of Frost Low 3C. Brandon: Clear with Frost Low -1C.

Tuesday: Will be another below seasonal day , sunny to partly cloudy skies are expected with a chance of showers by lake Winnipeg and Lake Manitoba.  Winds will continue to be out of the north to northwest , and high temperatures will be well below there average day time highs. I’m only expecting high temperatures to reach the low to mid teens (9 to 14C), this will be the last day of temperatures below 10C. Winnipeg: Sunny , High 13C. Brandon: Partly Cloudy, High 10C.

Tuesday Night: Clear Skies and cooler than average temperatures are expected. The good news is that there won’t be any showers by the lakes as winds shift to the west overnight. There also will be cool enough temperatures for the risk of widespread frost from SW Manitoba, towards south of Lake Manitoba into the interlakes. Temperatures are forecast to drop into the low minus single digits to the mid single digits (-3 to 5C). There also will be a risk of frost . Winnipeg: Clear, risk of frost low 3C, Brandon: Clear, frost low 0C. 

Wednesday: Looks like a push of warm Pacific air will move into the province, as a warmer airmass looks to envelop the Canadian prairie provinces allowing for more seasonable temperatures into the region. I’m expecting mostly sunny skies with more cloud cover in the interlakes. High temperatures will soar into the mid to high teens for the day (14C to 19C). Winnipeg: Sunny High 17C, Brandon: Sunny High 18C. 

Second half of the week:

The warm pacific air looks to continue moving east with warming temperatures towards the weekend in the low to mid 20s, with partly sunny to mostly sunny skies. Enjoy!