Markham, ON - Recent school projects have prohibited me to update my blog. When I was looking at the GFS model yesterday, I was given a shock. I just realized how messy our forecasts might be in Mid-December with series of storm, one after the other.

Today's blog, however, will be covering the Colorado Low moving in Tuesday only, due to its "urgency". At 8:00 pm EST, the Colorado Low is developing and growing by absorbing moisture back in the Four Corners. The Colorado Low is now currently nothing other than a band of light rain showers. However, throughout tonight, the Low will strengthen and moving fast across the US Central Plains.

The GFS forecast is calling the Colorado Low to rapidly deepen throughout the evening and overnight hours. The Colorado Low deepens in terms of barometric pressure, meaning stronger precipitation bands. The precipitation bands, however, will not cross the Canada-US border until 9 am EST. By 9 am, Windsor could see rain showers, as the temperature is too warm to sustain snow, due to the migration of warm air brought by the Colorado Low from the Gulf of Mexico. The freezing line will stay relatively stagnant, as the warm front do so also. The freezing line primarily are located west to Midland, Ontario, to east over at Brockville, Ontario. Thus, the Greater Toronto Area is exposed to warmer temperature tomorrow, at a daily high of 2 C. The GFS Model is suggesting the first bands of precipitation to invade the Toronto Area near noon hours. By then, the initial precipitation could be wet snow or ice pellets, depending on the upper air temperature. From current's view, ice pellets are likely, as the upper air is still at around freezing mark. On and off these ice pellets will continue, accumulating up to 5mm. The heavier bands of precipitation will come in around 6 pm Tuesday Evening, switching over to wet snow around 9 pm of the same evening, as the upper air temperature is cold enough to sustain snow. However, the surface temperature remaining at 1 C is not good news. This means that the snow will become wet snow as it reaches near the surface, making it harder to accumulate, and more slippery driving. The precipitation will gradually weaken throughout the night, especially the heaviest bands out of the way by around 4 am. The rest of the precipitation from the back side of the low will produce some light snow to flurries ending late morning. For the Greater Toronto Area, snow accumulation could be as high as 5 to 15 cm, with rainfall values around 10 to 20 mm. Southwestern Ontario could see higher surface temperature, with snowfall values from none to 5 cm, rainfall values from 5 to 25 mm. North and East of Toronto, the snow accumulation could be higher than 5 to 15 cm, but should stay within that neighbourhood, and rainfall values around 5 to 15 mm.

And yes... to answer the title... Could it get ANY worse??... Yes it can. If you are a meteorology lover, you should know. Recent forecast models picking up a SubTropical Storm and a Colorado Low can merge together on Wednesday, near the Hurricane Valley. The result of the merger will cross over Southern Appalachian, and reaches the Atlantic Seaboard, where it gains more energy. This could possibly be a Weather Bomb and a Nor'Easter for the Canadian Maritime with high snowfall amounts and windy conditions. Ontario and Québec will see minimal impact from this storm, with less than 10 cm snow accumulation. GFS model is now already claiming the heaviest snow to fall around New York City, the point where the merger enters Atlantic Ocean. New York City could see 30 to 40 cm of snow.

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