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In Brief:
If it wasn't for the cold fronts coming this weekend, this would be a very boring discussion. In advance of that, we'll see above average temperatures and a small chance of an afternoon thunderstorm. The main front arrives mid-afternoon Saturday with a better chance of showers/thunderstorms.
Sunday is cool with slowly clearing clouds. We remain just below 80F for much of next week with some afternoon rain chances.
Forecast Discussion:
Today (Thursday) will see very low chances of afternoon storms (more in the southern mountains again - Figure 1). We end the week with above average high temperatures (mid 80'sF). The first surge of cool air comes in Friday afternoon (blue line - Figure 2) with a slightly better chance of showers. We are cooled 10F on Saturday.
The Longer Range Forecast:
The next front comes in Saturday afternoon (with the big peak in rain chances - not marked by an added graphic- Figure 2) and we cool another 10F going into Sunday.
This double shot of cool air is coming in thanks to a big trough north of the state (Figure 3). Rain amounts over the next 5 days (the green line in Figure 2 - and painted out in Figure 4) show Longmont getting minimal rain totals, but lucky folks in the mountains and out on the eastern plains will break 1 inch of water.
There isn't any severe weather on the near horizon either. Any storm can be dangerous with local flooding, lightning, and a blast of strong winds. Respect the storms, especially if you are up in the mountains!
