August 2021 archive

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… 🙂

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VIDEO: Heat And Humidity Lead To Dangerous Conditions To Be Outdoors; Watching the Gulf of Mexico Early Next Week And Prospects Of A Cooler Open To September…

Updated 08.25.21 @ 8:45a

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VIDEO: Eyeing A Potential Pattern Change As We Get Into September…

Updated 08.24.21 @ 10:20a

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VIDEO: Heat, Humidity, And Tracking Storm Complexes In The Week Ahead…

Updated 08.23.21 @ 9a

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Weekly #AGwx And Severe Weather Outlook: Heat, Humidity Top Story, Locally; Henri Impacts New England…

Updated 08.22.21 @ 6:30a

An upper level ridge will expand across the Ohio Valley through the upcoming week. Meanwhile, a trough will continue to provide unseasonably chilly air for the northern Rockies and inner-mountain region.
Well above average temperatures will take up shop from the central Plains into the Great Lakes and Northeast. Unseasonably chilly conditions will prevail across the northern/ central Rockies.
Above normal precipitation is expected in association with Henri across New England. The northern Plains and upper Midwest can also expect above normal rainfall in the week ahead.
We forecast on average between 0.50″ and 1.00″ of rain across central Indiana in the upcoming 7-day period.

Forecast Period: 08.22.21 through 08.29.21

The overall weather pattern in the week ahead will feature an expanding ridge of high pressure into the Ohio Valley and lower Great Lakes. This will lead to oppressive heat and humidity expanding northeast (multiple days of highs into the lower 90s with high humidity values will make it feel closer to 100° through early and middle parts of the work week). Meanwhile, a persistent trough will continue to take up residence through the early part of the forecast period across the northern Rockies (additional early season snow will fly for the high peaks above 12k feet). The other big story during this forecast period? Henri, of course. Henri will deliver quite a blow to our friends in New England beginning later today, continuing a heavy interior rainfall threat through the early and middle part of the work week.

Back here on the home front, each and every day will feature isolated storm coverage. While “isolated” is the key word, if you find yourself under one of these storms, a quick 1″+ of rain is a good bet with the moisture content we’ll be dealing with. Somewhat better storm coverage is anticipated during the 2nd half of the work week (we’ll label it “widely scattered to scattered.” ;-)).

Permanent link to this article: https://indywx.com/weekly-agwx-and-severe-weather-outlook-heat-humidity-top-story-locally-henri-impacts-new-england/