Monday, March 19, 2007
First day of spring heralds the arrival of milder weather pattern..
Tuesday marks the first official day of spring, but winter was doing its best to retain its crown to the very end with another blast of cold arctic air Monday over southern MB. The Arctic high pressure system responsible for the cold blast will move off to the east tonight, with a southerly flow of milder air developing overnight. Tuesday will be a transition day over southern MB as strong southerly winds flush out the cold air that moved in today. Temperatures will gradually moderate towards the freezing mark by late in the day, however gusty southerly winds to 60 or 70 km/h will make it feel noticeably cooler. Temperatures will continue to climb Tuesday night to above freezing values, with more springlike temperatures of +7C likely on Wednesday along with lighter winds and the possibility of some rainshowers. The rest of the week looks mild and dry, with daytime temperatures above freezing every day into the weekend which should make a significant dent in the snowpack over southern MB. Temperatures will be especially mild this weekend with double digit temperatures possible over the Red River valley. Hopefully this truly marks the start of spring!
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Still below freezing even south of Fargo as of 10 am. With a southerly flow persisting today, temperatures in Winnipeg will remain below freezing this afternoon, struggling to the zero mark by evening. I do expect temperatures in Winnipeg to climb above feezing tonight as milder air from the south finally spreads north (just as the vernal equinox starts!) Those milder temperatures moving over our extensive snowpack may also be accompanied by a lot of low cloud and drizzle or fog overnight into Wednesday morning as the low levels saturate.
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