Latest Forecast: As Summer Monsoon Season Begins, Rain Chances Go Up

By Ashton Altieri
DENVER (CBS4) – The summer monsoon is annual shift in the wind direction over the southwestern region of the country from California to Colorado. Sometimes it arrives as early as June and as late as August. But generally it starts in mid July and this year it appears it will start this week. High pressure that has been centered almost directly over Colorado every day this month will shift slightly east and allow the overall wind pattern in the upper atmosphere to become s