Rex Block (And Its Nice Weather) About To Go

Posted at 6:38 PM, Oct 22, 2018
and last updated 2018-10-22 20:38:39-04

It’s been over a week now that the weather has not changed much, that’s because of a “rex block” weather pattern.  When high pressure forms north of an area of low pressure, it creates a constant weather pattern that can persist for a long time, hence the weather we’ve experienced over the last 9 days.  This rex block weather pattern isn’t all good though, as some buildup of stagnant air has lead to “moderate” air quality in the western valleys of Montana.  High pressure traps cooler air and some pollution when there is a lack of wind.  While the Montana plains have had a good wind at times, the valleys have seen little to no wind for these last 9 days.  Rex block and this weather will start to break down on Tuesday.  You’ll notice some clouds which we haven’t had in a while.  Even a few showers may fall over extreme southwestern Montana.  Wednesday and Thursday will be partly cloudy, generally dry and mild.  Beginning Friday, more showers and high elevation snow will move into the state as the rex block leaves town.  Mostly cloudy and wet weather will continue into Saturday.  Temperatures will stay fairly mild through the weekend, but later next week some colder air with a return of snow showers are likely right around Halloween.

Thanks Rex Block! See you next time…

Curtis Grevenitz