Category: Weather Rambles

MJO And Other Drivers Aligning For Cold Close To Meteorological Winter; Open To Spring?

Updated 02.09.23 @ 8:53p

After a bitter Christmas period, the “snap back” came on with authority. The mild start to the year has carried into February. A look at the past (30) days:

Despite multiple attempts, the cold “jabs” haven’t had any staying power. In the short term (upcoming 10-14 days), an overall milder than normal regime will carry the day.

With that said, longer range teleconnections are providing clues that the pattern may, indeed, begin to resemble a more sustained colder than normal temperature regime by late February, continuing through the bulk of March:

Negative NAO:

Negative WPO:

Negative AO:

Negative EPO:

Then, perhaps most significant, the MJO is showing signs of cycling in Phase 8 to close February and open March.

Both periods feature a cold, to much colder than normal, pattern in Phase 8:

MJO Phase 8: Feb

MJO Phase 8: March

Perhaps the latest European Weeklies for late Feb through late March are onto the correct idea…

Permanent link to this article: https://indywx.com/mjo-and-other-drivers-aligning-for-cold-close-to-meteorological-winter-open-to-spring/

Monday Evening Notes On Upcoming Snowstorm; Additional “Wintry Mischief” On Deck…

Updated 01.23.23 @ 6:01p

While not “overly cold” (at least yet), we’re heading into a special pattern for snow/ winter weather lovers. After the leading wave of accumulating snow over the weekend, a much more “meaningful” storm eyes the region late tomorrow night and Wednesday.

In short, we don’t have any changes to our thinking since Saturday on this storm. Snow will lift in here from the south during the overnight and become heavy throughout the morning hours. Snowfall rates will likely approach, if not exceed, 1″ per hour during this time period and will lead to a horrendous morning rush all throughout the region. If you don’t absolutely have to travel, we recommend staying put. Embedded intense snow bands will likely pivot into the city throughout the morning, elevating those snowfall rates and reducing visibility.

Heaviest snow looks to fall in the 2a to 11a timeframe in the city, itself. This will be a wet, heavy (paste-like) snow.

We still don’t see a reason to alter our ongoing snowfall forecast published first to Clients Saturday. This is only for the Tuesday night-Wednesday period and doesn’t account for additional light snow accumulation that will take place Thursday into Friday. Needless to say, there will likely be some across central Indiana that close in on double-digit storm totals by the time all is said and done.

And just as soon as we catch our breath from this storm, attention will turn to the following winter weather makers:

  1. A clipper system that will scoot through the Great Lakes region Friday. This will likely lead to a period of more concentrated, albeit light, snow Friday PM. Additional light snow accumulation is possible across central and northern IN during this time period.

2. Another southern stream system approaches Saturday evening. While milder air will be present (at least aloft), it’s also very possible the modeling will be forced to correct colder after realizing what kind of deep snowpack will likely be deposited across the region midweek. Long story short, we feel this storm system will also be capable of producing a wintry mix of snow and/ or sleet and freezing rain Saturday night into Sunday. Additional details will have to be sorted out in more specific fashion after midweek.

Thereafter, with the negative PNA and negative EPO in place, we’re likely to deal with additional wintry “fun and games” into the middle and latter part of next week, but with this being more than 7 days out, there’s no reason getting too excited from this point with specifics.

Needless to say, we’re in about as good of a position as one could ask for accumulating winter weather events in the medium range period. We’ll just have to take one storm at a time.

Make it a great evening!

Permanent link to this article: https://indywx.com/monday-evening-notes-on-upcoming-snowstorm-additional-wintry-mischief-on-deck/

Tuesday Morning Rambles…

Updated 01.10.23 @ 7:29a I. A few showers will move through central Indiana Wednesday but these won’t amount to much and will be fast moving. The showers will be on…

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/tuesday-morning-rambles-5/

After A Quiet Open To January, Busy Times Return…

Updated 01.09.23 @ 6:56a

Month to date, IND is running slightly behind average in the precipitation department. As we look ahead at this week, and beyond, it seems like we’re poised to make up for lost time in that regard.

A hyper active Pacific jet will hand multiple storms off to the east in the coming week to 10 days. The first of which will arrive the middle of this week as low pressure moves from the central Plains into the eastern Great Lakes.

Rain will overspread the region Wednesday and we still need to monitor the possibility of a transition to wet snow Thursday.

Additional storm systems of note are dialed up Sunday night and Monday and again the middle of next week.

Permanent link to this article: https://indywx.com/after-a-quiet-open-to-january-busy-times-return/

12z Update On Mid-Late Week…

Updated 01.08.23 @ 8:54p After having a chance to take a look at the 12z suite, there’s not much, if any, reason to alter our ideas from this morning on…

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/12z-update-on-mid-late-week/