Best chance of moisture this week around Thursday
Monday, August 28, 2017
While a powerful storm spins in the Gulf of Alaska, and hurricane Harvey inundates the western Gulf Coast, a ridge of high pressure is dominating the western U.S. weather, bringing cool nights and above average daytime temperatures with only the slightest chance of light afternoon showers. This pattern will persist through midweek before a couple of waves of energy ejecting out of the Gulf of Alaska storm manage to dent the ridge and bring some moisture to the Intermountain West.
The first wave around Wednesday will hardly be noticeable except for an increase in clouds and perhaps a better chance of a weak afternoon shower. The second wave for Thursday and Thursday night looks more significant, and we should have a good chance of showers later Thursday and Thursday night that may extend into early Friday morning.
The western ridge rebounds behind the departing disturbance by Friday afternoon. It appears the ridge axis will move a bit further to the west as cool air begins to encroach upon the northern Midwest, though there is uncertainty as to how far west the cooler air reaches late in the long Labor Day weekend. The weather in Steamboat Springs will return to the usual late summer pattern of warm to hot dry days and cool nights for at least the first part of the weekend, with the possibility of some slight cooling by late in the weekend and early next week.
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