Make it a 'three-peat': Wednesday's weather similar to Monday and Tuesday

A northwest to southeast pattern in the upper levels across Alberta will continue for Wednesday.

Temperatures in northern Alberta will remain quite cool compared to southern Alberta, and snow is tracking along a line through the central portion of the province.

In Calgary, partial cloud cover and seasonal temperatures will continue to limit melting – a situation that is likely to continue until the start of the weekend.

A prominent dip in the jet stream will support colder air that is starting to sink south and east across the eastern Prairies and is aiming for the eastern seaboard in the U.S.

On the southern end of this trough is a strong infusion of warm and humid air from the Gulf and as these two opposing air masses collide significant weather is expected.

That low will swing east and north across the Great Lakes and into the Atlantic provinces over the next few days, with all types of precipitation expected.

Of greatest concern is heavy rain, freezing rain and snow accompanied by strong winds, and the potential for “flash freezing” - a situation that occurs when pooled water from accumulated precipitation turns to ice due to a rapid decline in temperatures that drop below freezing from initial values above freezing.

Behind that system, some cooler air will flow across southern Alberta bringing below seasonal temperatures for the start of the week.

In Calgary, the daytime highs (which normally sit close to -1C) are expected to top out around -9 C and -7 C on Monday and Tuesday.