Weekly Outlook: September 20-26, 2021

“Summer’s going fast, nights growing colder”

That line from the Rush song “Time Stand Still” is talking about the next couple of days. Summer officially ends with the autumnal equinox at 3:20pm on Wednesday.

We start the week off with high pressure in control, providing us with sunshine and seasonably mild temperatures. As the high moves offshore on Wednesday, southerly winds will bring warmer and more humid air into the region. There may be enough moisture around to trigger a shower or two across the interior, but for the most part, the day will remain dry.

Tuesday morning could be a little chilly across the interior. Image provided by WeatherBell.

The end of the week is where things get tricky. A slow-moving frontal system will head this way, but the models don’t agree on the timing of the system. One model has the system bring us a rainy day on Thursday, with the showers ending early Friday. A couple of others have just a few showers on Thursday, with the bulk of the rain moving in on Friday and lingering into part of Saturday as the front really slows down. Given the trends recently, we’re going to lean toward the slower timing for now. This will impact Sunday’s forecast as well, as another system will be following, and if the first system takes longer to move out, then then second system will take longer to move in. We should have some more clarity on this for our Weekend Outlook on Thursday.

The models don’t agree on the timing, but they all show a pretty decent amount of rainfall for the end of the week. Images provided by Pivotal Weather.

Monday: Sunshine and a few afternoon clouds. High 68-75.

Monday night: Clear to partly cloudy. Low 48-55.

Tuesday: A mix of sun and clouds. High 67-74.

Tuesday night: Partly to mostly cloudy. Low 55-62.

Wednesday: Partly sunny, chance for a few showers, mainly across the interior. High 71-78.

Thursday: Intervals of clouds and sun, a few showers are possible, mainly across the interior again. High 72-79.

Friday: Mostly cloudy and breezy with showers likely, possibly some steady rain at night. High 70-77.

Saturday: Showers end by early afternoon, some sunny breaks may develop in the afternoon, especially across the interior. High 68-75.

Sunday: Partly to mostly sunny. High 67-74.

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