Monday, January 18, 2010

More freezing drizzle

Low pressure moving off the New England Coast, combined with a trough over southern Quebec, is producing a moist northeast flow down the St. Lawrence Valley this morning. This flow is producing drizzle that is freezing on contact with the cold surface. This cold air has been in place in Montreal for the last 24 hours. Yesterday the mild air made it no further than the US border, at one point there was a 10 degree difference between Burlington, Vermont and Montreal. The cold air will be very difficult to move out of valley locations and I expect the freezing drizzle to continue until it changes to light snow this afternoon as the air cools aloft. The precipitation has caused very icy roads again across southwest Quebec and into eastern Ontario with numerous accidents reported. Many road crews were caught off guard as there was no mention of this in yesterday's forecast. We awoke this morning to a late issued weather warning from Environment Canada and the freezing drizzle. Unlike Friday morning I remained on my feet today!

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