Subtropical Ridge Pattern
Joel Burgio Telvent DTN Senior Ag Meteorologist
Fri Jul 5, 2013 12:05 PM CDT

The southwest U.S. ridge strengthened late last week, the last few days of June. This ridge then pushed well to the north over the western U.S. during the weekend and during the first couple of days of July. This is the reason for the extreme heat that developed in the southwest and eventually pushed all the way northward through the Pacific Northwest and into southwest Canada earlier this week. This ridge has been weakening somewhat since early this week, enough to allow a weak cold front to push through the Pacific Northwest and into the northern plains at the end ...

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