A touch of the Southwest monsoon

8:20 AM MDT, Friday, July 24, 2020

One of the seasonal cycles that we look for each July is the Southwest monsoon (also called the Mexican monsoon and the North American monsoon). During this cycle intense thunderstorms form each day in the coastal mountains of Mexico and pump moisture into the atmosphere. That moisture gradually makes its way north in July and August into the southwestern U.S., sometimes as far north as Colorado, sometimes not that far. Late July and early August tends to be the peak time for monsoon moisture along the Front Range.


There has been a lot of westerly winds this month which has made for a weak or non-existent monsoon for the Front Range region. But today through early next week will likely see a couple intrusions of that monsoon moisture and more areal coverage of afternoon/evening showers and thunderstorms.


Long range forecast models suggest that by the last couple days of the month the Front Range will return to a hot and dry pattern. For now let’s hope for a some moisture for the local vegetation.

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