SAN JUAN MOUNTAINS WEATHER: POSSIBLE 3 – 6″

19 Mar SAN JUAN MOUNTAINS WEATHER: POSSIBLE 3 – 6″

Jerry Roberts, weather guru

There is a transitory dry ridge building over western Colorado tonight then a shortwave trough ejects from a Pacific storm bringing clouds by Wednesday morning.  By late Wednesday afternoon the upper flow is westerly favoring the central and northern mountains, but orographic showers should be increasing by evening with 3-6 inches possible by Thursday morning in the west/north San Juans.

Models show a developing large upper trough of low pressure forming over Montana and Alberta late in the week with jet energy digging a trough and pinching off into a closed low over SW Colorado by Saturday morning and exiting by late Saturday early Sunday.  The system doesn’t seem to have a lot of moisture, but with a closed-low you can get surprised.  A ridge of high pressure builds into the Great Basin early next week.