HEAVY RAIN DEVELOPS THURSDAY NIGHT INTO FRIDAY…

WARM THIS WEEKEND WITH SMOKE ALOFT…

1,2 PUNCH OF COLDER AIR NEXT WEEK…

CHILL LASTS INTO EARLY OCTOBER…

We certainly have a different Fall this year than in years past. It’s been several years since the start of Fall has been cool and chilly. For the past few years, the summer warmth has continued well into Fall. It’s clear that will not be the case this year.
Clouds and eventually heavy rain from Post Tropical Cyclone Beta are in store for the entire area Thursday into Friday. I think Thursday is just cloudy for the most part with a few light sprinkles in spots.
The forcing and dynamics go into high gear Thursday night into Friday with heavy rain of 1-2″ plus possible. I can’t rule out some localized flooding issues, but the rain is also needed for some due to the dry weather we’ve seen. The rainfall rates will make all the difference Thursday night and Friday.
The system clears for the weekend and the jet stream goes zonal, meaning straight across the country from west to east with no big dips or ridges. The zonal flow will probably tap the wildfire smoke again out west, so I’ve included sun with smoke in the forecast for the weekend. That means instead of blue skies, it may be more of a white, sunny sky. Highs warm to around 80 Saturday and Sunday.
The jet stream will buckle significantly next week. It now looks like the cold will arrive somewhat gradually behind a weak front at first next Monday, with a much stronger front next Wednesday. That’s typical with a pattern change. It takes a few fronts to do the trick.
The trick will work, though, and it will get chilly starting Wednesday and lasting the rest of the week. Highs into early October will be a good 10-degrees or more below normal. Lows after the front Wednesday will fall back into the upper 30’s with some 20’s possible in the mountains!

Meteorologist Jamey Singleton