Category: Ensemble Discussion

Weekly #AGwx And #Harvest21 Outlook…

Updated 09.11.21 @ 8:12a

A broad upper ridge will take up shop in the week ahead across the Ohio Valley and Northeast. Meanwhile, a trough will settle into the Northwest.
Well above normal temperatures can be expected across the central portion of the country, extending from the West Coast into the Ohio Valley and Mid Atlantic. Below normal temperatures will be found across the Pacific Northwest and along the Gulf Coast.
An active weather pattern is on deck across the northwest Gulf and eastern Great Lakes. Elsewhere, generally quiet times are expected.
We think around 0.50” of rain will fall during the forecast period (most likely not until late in the week).

Forecast Period: 09.11.21 through 09.18.21

A quiet weather pattern is expected to dominate this forecast period, locally. A southwesterly airflow will draw unseasonably warm and muggy air northward today, but really begin to be felt as we progress into early next week. We aren’t talking about organized precipitation chances until late in the forecast period (centered on Friday and next Saturday) as a cold front slowly begins to sink south into the area. Until then, an extended period of warm and increasingly humid air will dominate the weather headlines.

Permanent link to this article: https://indywx.com/2021/09/11/weekly-agwx-and-harvest21-outlook-2/

VIDEO: Cold Front Offers Up Dry, Cool Reinforcements; Heat Builds Early Next Week…

Updated 09.07.21 @ 8:13a

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VIDEO: Significantly Warmer Times On Deck By Mid-Month…

Updated 09.06.21 @ 9a

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VIDEO: Saturday Showers Give Way To A Pleasant Sunday And Labor Day; Warmer Mid-Month Trends…

Updated 09.03.21 @ 8a

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VIDEO: Extended Stretch Of Early Fall-Like Weather As We Welcome In Meteorological Autumn…

Updated 09.01.21 @ 5:26p

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Winds Of Change On The Doorstep…

Updated 08.31.21 @ 8:11a

We have one more day of humid conditions, but a wholesale pattern change will have things feeling much different around these parts beginning tomorrow, and continuing for the foreseeable future.

Note the drier air beginning to invade northern portions of IL, IN, and OH this morning. While dew points are still stuck in the mid-upper 60s, locally, that less humid air is heading south.

Note how the trough really amplifies next week across the eastern portion of the country. This will pull down an extended stretch of cooler, less humid air as we move through the better part of the first half of September.

A reinforcing cold front will sweep through here Saturday (yes, we’re giving in to building rain and storm chances into our Saturday forecast) with unsettled conditions.

This is likely going to set the stage for an overall wetter, cooler stretch of weather next week. Additional rain chances will arrive Tuesday and Thursday of next week.

8 of the past 10 days featured highs at or above the 90° mark, and was easily the hottest stretch of the summer. Looking ahead, a “hint” of fall shows up on the medium range charts just in time for us to kick off meteorological fall (officially, tomorrow).

Much more later, including our September Outlook…

Permanent link to this article: https://indywx.com/2021/08/31/winds-of-change-on-the-doorstep/

VIDEO: Tracking Heavy Storms Over The Next 24-36 Hours Before Much Drier, Cooler Air Invades To Close Out The Week…

Updated 08.30.21 @ 7:50a

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VIDEO: Devastating Hurricane Ida Makes Landfall This Afternoon; Tracking BIG Changes Here By Midweek, Continuing Into Labor Day Weekend…

Updated 08.29.21 @ 11a

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VIDEO: Explaining How Ida And A Cold Front Can Work Together To Draw In MUCH Drier, Cooler Air Leading Up To The Labor Day Weekend…

Updated 08.27.21 @ 9:15a

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Permanent link to this article: https://indywx.com/2021/08/27/video-explaining-how-ida-and-a-cold-front-can-work-together-to-draw-in-much-drier-cooler-air-leading-up-to-the-labor-day-weekend/

Meteorological Fall Only 5 Days Away- Long Range Update Into Mid September…

Updated 08.26.21 @ 8:48a

Is there anything more polarizing than pumpkin spice products?! Count my house in favor of rolling these items out in late August. (I think my wife bought her first autumn candle of the year a few weeks ago and, rest assured, upon our return from the beautiful Gulf Coast, it will be lit almost immediately).

Despite the fact we’re in the hottest and most humid stretch of the summer (mind you, in a summer that really hasn’t been that bad from that from a heat perspective), we’re at a point where we’re shaving off nearly 2 and a half minutes of daylight per day.

As we look at the upcoming 3-4 weeks, the primary drivers still appear to be the EPO and MJO movement. Pardon us if you’re tired of hearing this word, but it’s still the best, in our opinion, when describing the upcoming several weeks: “transient.”

Consider the more amplified look to the MJO:

As well as the EPO:

Thinking here is that the EPO and MJO will work in tandem to drive a very transient regime over the next 3-4 weeks. Perhaps the past few days have been a hint of what’s to come with more appreciable precipitation into the “heart” of central Indiana- an area that, for the most part, missed out over the latter half of July and first half of August. Officially, Indianapolis is now only 0.89″ in the hole.

Let’s take a look at some of the more trusted medium-long range computer model guidance:

JMA Weeklies

Week 1

Week 2

Weeks 3-4

CFSv2

Weeks 1-2

Weeks 3-4

European Weeklies

Week 1

Week 2

Week 3

Week 4

The largest takeaway between the drivers (MJO and EPO) and computer guidance above is that we will inject a wetter regime back into the mix over the upcoming 2-4 weeks (especially compared to the past 4 weeks). While we’ll likely cool somewhat in early September, the pattern, as a whole, looks warmer than normal over the upcoming 2 to 4 weeks, locally. The opposite can be said for the northern Rockies as early winter conditions will make their presence felt during this period. It’ll be particularly interesting to see if the JMA is correct in driving that strong western trough in the Weeks 3-4 time period. Should that come to fruition, it would likely pump unseasonably hot conditions across the East during that time frame, but, eventually, a piece of that trough may shift east late month and set up a cooler regime to end September.

Regardless, be sure to enjoy that PSL… 🙂

Permanent link to this article: https://indywx.com/2021/08/26/meteorological-fall-only-5-days-away-long-range-update-into-mid-september/

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