Markham, ON - For many Ontarians, this blog entry will be a piece of good news! It looks like as if spring has arrived across much Ontario. Well, at least, temporarily, and at least, for the next week or so.

Temperatures in the past few days have been well above the freezing mark. Yesterday's daytime high temperature at my home weather station was way beyond the expected. It soared to a high of 13 C yesterday, with mainly sunny skies. Similar story goes on for today, the daytime temperature soared to 5 to 8 C across much of the Greater Toronto Area.

It was all thanks to the warm front, which brought us some snow on Thursday, accumulating less than 2 cm. That warm front kicked in southernly winds, as well as it brought some of the warm air from the Gulf of Mexico. It looks like the warm air will stick around for quite a bit, at least until next Wednesday or so.

Recent weather models suggest a return northerly flow for tomorrow (Sunday) as well as Monday. However, due to the strong sunshine, the temperature will not go down drastically, but rather, linger around the freezing mark. While the forecasts suggest around -3 to 0 C values, I have confidence that temperature in open areas (not near the lake, as the lake is still freezing cold, and can affect the local temperature) can reach as high as 3 C for Sunday/Monday.

Then, next comes will be the surge of warm air from an incoming low pressure system. I will have more coverage on this system later. It looks like, for now, that we will start this system as snow, then gradually switching over to wet snow, eventually giving way to showers. All these transition of precipitation will happen on Tuesday. On Wednesday, we will see scatter showers, as we enter into the warm sector of the low pressure system. Temperature will soar as high as 6 C for much of the Golden Horseshoe, with double digit highs possible in extreme southwestern Ontario. This day will be the peak of spring conditions. The freezing line will "move" as northerly as Moosonee, along the southerly shores of James Bay. Hence, we can see, this is a major shot of warm air.

Cold front will then sweep through much of Ontario on Thursday, and will give way to some snowfall on the Easter Weekend.