Sunday, August 19, 2018
The Steamboat Springs area is currently experiencing a delightfully cool Sunday with a noon temperature around 60 F, courtesy of cool northwest flow behind a departing storm. The storm brought beneficial rains to the Yampa Valley this weekend, with between one and two tenths of an inch associated with a 6 pm thunderstorm Friday and another three to four tenths mostly occurring during steadier rainfall Saturday morning.
Energy still rotating around the backside of the storm will drag a reinforcing shot of cool and dry air over our area this evening leading to a chilly start to Monday morning, and another day of pleasant temperatures below or close to average.
Meanwhile, a Pacific storm that is currently stalled over Oregon will interact with both some cool air dropping southward from western Canada and monsoonal moisture moving northward along the western periphery of the rebuilding southwestern U.S. ridge. Most of the Canadian cool air will move eastward through the northern Rockies and bring a cool front through Wyoming Monday night, with precipitation initially looking to stay north of Colorado border. However, by Tuesday afternoon and especially overnight, monsoonal moisture and energy will then move over our area, bringing a good chance of accumulating rainfall.
By Wednesday, the bulk of the Oregon storm is forecast to begin moving eastward across the northern Rockies, and we should see a continued chance of more intermittent but possibly strong storms from Wednesday through Thursday evening.
Drier air moves in behind the departing storm for Friday and the first part of the weekend, though another quick moving Pacific storm is forecast to cross the Pacific Northwest coast around then. Early indications are that this will nudge the southwestern ridge of high pressure back to the east, and that will re-open the door to more monsoonal moisture moving northward along the western periphery of the ridge. Some of this moisture may move over our area by late in the weekend for an increasing chance of showers as early as Sunday.