Category: Long Range Discussion

The Pending Halloween Pattern Transition And Initial Taste Of Winter…

Updated 10.21.23 @ 7:34a

The upcoming week will feature a pattern shift, albeit a transitional one, that will drive unseasonably warm temperatures north into the Ohio Valley and Great Lakes region. This will be on the heels of the first widespread frost of the season Monday morning. Ah, Indian summer at its finest.

A couple of disturbances will try to make inroads into this ridge mid and late week, but will likely struggle in providing much in the way of precipitation or cooler air initially. As we push into the latter part of next week and the Halloween weekend, a larger storm system is anticipated to move east out of the Plains region. This storm will likely deliver the first widespread winter impacts (outside of the mountains of course) of the fall season.

Specifics will be fine tuned as we get closer, but we expect a widespread rain (perhaps a clap of thunder) here next weekend followed by sharply colder weather prior to Halloween, itself.

We’re left with a much different pattern to open November. This is the type regime that will likely lead to the first lake effect snow in the snow belt, drive the 1st widespread freeze into the Ohio Valley, and result in highs in the 40s in the wake of the frontal passage.

Farmers and those with ag interests, we’d suggest wrapping up harvest 23 efforts by mid next week if at all possible. Conditions will certainly become harsher and less favorable by next weekend. More to come…

Permanent link to this article: https://indywx.com/the-pending-halloween-pattern-transition-and-initial-taste-of-winter/

VIDEO: Damp Thursday Gives Way To A Gusty Saturday; A Lot To Discuss Over The Next 10 Days…

Updated 10.19.23 @ 7:17a

You must be logged in to view this content. Click Here to become a member of IndyWX.com for full access.  Already a member of IndyWx.com All-Access?  Log-in here.

Permanent link to this article: https://indywx.com/video-damp-thursday-gives-way-to-a-gusty-saturday-a-lot-to-discuss-over-the-next-10-days/

VIDEO: New Seasonal Guidance “Ups The Ante” For Upcoming Winter; Unsettled Close To The Work Week…

Updated 10.17.23 @ 5a

You must be logged in to view this content. Click Here to become a member of IndyWX.com for full access.  Already a member of IndyWx.com All-Access?  Log-in here.

Permanent link to this article: https://indywx.com/video-new-seasonal-guidance-ups-the-ante-for-upcoming-winter-unsettled-close-to-the-work-week/

LR Update: Checking In On The Pattern Drivers To Close October…

Updated 10.12.23 @ 10:50a

As we roll into the second half of October, a look at the primary pattern drivers suggests there should be a lack of any sort of sustained above normal temperatures.

The PNA (image 1) should remain mostly in a positive state over the next couple weeks while the EPO (image 2) is expected to be in a neutral to negative state.

Furthermore, the MJO is forecast to sneak into Phase 1 late month. This is the correlation in October:

It’s hard to find much at fault with the NEW JMA Weeklies posted earlier today.

Temperatures

Week 1

Week 2

Weeks 3-4

Precipitation should run average to slightly below normal over the span of the upcoming (2) weeks:

Permanent link to this article: https://indywx.com/lr-update-checking-in-on-the-pattern-drivers-to-close-october/

Active Mid And Late October; Another Unseasonably Cold Shot On Deck…

Updated 10.09.23 @ 7:35a

We’re opening the work week with a few scattered clouds and temperatures around the 40° mark. We’re in a pattern that will feature predominantly cooler to colder than normal temperatures over the next 10-14 days with a couple exceptions. We’ll call it a sea of cool with an island of warmth (Thursday and Friday). The relatively warmer temperatures come after the passage of a warm front and ahead of a cold front. The “in between” will feature another period of unsettled and stormy weather to close the work week.

The overall upper air pattern shows that Hudson Bay blocking high and tendency for an eastern trough through the upcoming 2 week period. Another big cold shot will roll in here over the weekend and into the early Week 2 time period.

After a dry start to the week, rain chances will return late Wednesday and early Thursday (warm front) and again directly ahead of the cold front that will sweep through here Friday evening. Rainfall numbers with the passage of this system should check in between 0.25” and 0.75” for most of the region.

As we look ahead, a continued chilly pattern seems to be in store with additional storm dates that include:

10/19-10/20

10/23-10/24

Down the road, the strongly positive PNA and neutral to negative EPO should keep the chill flowing for the most part over the coming couple weeks. Eventually, these progressively colder shots will likely generate the 1st eastern flakes of the season, including for our friends in the beautiful high ground of those east TN and western NC mountains.

Permanent link to this article: https://indywx.com/active-mid-and-late-october-another-unseasonably-cold-shot-on-deck/