Monday, November 29, 2010

Cold Period Upcoming...Get Ready!

We are living on borrowed on "weather time" so to speak.  Temps have trended above normal in Cleveland for most of November.  Now, the pattern is about to make an abrupt change.  This change will more than likely entrench itself through the first two weeks of December.

What do we look at when trying to find these changes from a warm pattern to a cold one?

The first indicators are from way up north in Canada, the North Pole and Russia.  As the highs and lows travel around the earth, they often get into a pattern.  Recently, the highs have been present over the eastern US.  Over the next several weeks, the highs are shifting to the west and the lows (troughs or fronts) are replacing it.  The center low is over northern Canada.  This "Canadian Low" acts as the "center of the wagon wheel" swinging down "Alberta Clippers" with widespread small snowfalls.  See the graphic below.

The "warmer" pattern has held off the formation of ice over Hudson Bay
As the pattern changes, the front will be deeper and stronger with lots of cloud cover.

Here are the temperature trends for early this week and into the weekend for the US and Canada.  Notice the "32 degree" marker well north of Ohio in the first graphic then well south in the second.  Much colder for sure!

The bottom line is colder than normal air will stay around through the weekend and into most of next week.  When the snow flies, it will probably accumulate and stay on the ground for a while across most of Northeastern Ohio.

Winter is coming!

No comments: