April 12, 2010 - The Cold Front Came From The Wrong Way!

By: Mallory Brooke
By: Mallory Brooke

While it's not the usual motion of a cold front, some do approach the Valley from the northeast. They're called back door cold fronts - read more about it in today's blog!

Weather always does funny things, that's why we're always on our toes! Usually, a cold front approaches from the north, northwest, or west, with the wind direction behind the front typically from those directions.

However, back door cold fronts go against the norm. A back door cold front approaches from the east or northeast, with the winds behind the cold front coming from those directions. This typically happens when the clockwise rotation around the high pressure brings cooler air to the south and west, but can develop to the north of a strengthening area of low pressure.

We commonly use the term "back door cold front" when cool, moist air from the Atlantic moves in from the east or northeast and replaces dry, warm air.

More rain on the way for us this week - stay tuned to whsv.com and my blog for the latest!


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