A Mixed Weather Story For The Long Weekend

Some nice weather is on the way for the long weekend with some sunshine and warm temperatures for Saturday. The chance for showers and thunderstorms will come on Saturday night and on Sunday as a low pressure system moves through the interlake and Southern Manitoba.

A low will move through Saskatchewan tomorrow afternoon reaching Manitoba Sunday.

It will continue to be a beautiful evening out there for all folks in the South, with temperatures expected to dip into the mid to high teens and some clear skies. Tomorrow maybe a few degrees cooler than it was today as we see more cloudcover work it's way into the province out ahead of another system that will be moving in from Saskatchewan. We could also see some stronger winds ahead close to 30 km/h.

A possibly strong low level jet (LLJ) is forecast to develop on Saturday evening. According to A Weather Moment  "Current consensus is that a 40kt LLJ will develop over central North Dakota and slowly push eastwards overnight. An area of showers and thundershowers look to develop on the nose of the LLJ, mainly through areas between the International Border northwards towards Riding Mountain Provincial Park eastwards across the Interlake." The problem with this forecast currently appears to be associated with Isaac, as it will be pushing northwards towards Iowa before moving eastwards on Sunday. The moisture that is required for us to see thunderstorms on Saturday Night sits along a boundary left behind across the Northern States. The LLJ that forms tomorrow evening should be able to tap into the pool of moisture and transport it northwards into Southern Manitoba. However if the location of the moisture changes or moves which is Isaac then the LLJ would have little left to tap into and we would be left with no more than scattered showers. Along with little amounts.

A cold front will move through during the day on Sunday sparking up more showers and storms, possibly severe before they clear out during Sunday Night. Highs will be in the high 20's. Holiday Monday looks spectacular with highs in the mid to high 20's and a nice breeze from the Southwest.