Category: Forecast Discussion

Thursday Evening Long Range Update: Late Summer And Early Autumn Pattern On The Horizon…

As we traverse the “dog days” of summer and look ahead to early autumn, what does the overall pattern hold? As is typical this time of year, the tropics are on the verge of becoming much more active, as well. Given analogs and other drivers, we suggest those with plans to the Gulf or Carolina beaches pay particularly close attention to the developments in the coming weeks and couple of months ahead.

The short-term is, obviously, highlighted by unseasonably warm-hot conditions but there’s reason to buy into the ‘mean’ ridge position retrograding west prior to month’s end. The large majority of long range data shows this taking place, as well.

Note the way the new European Weeklies, CFSv2 Weeklies, and JMA Weeklies handle this evolution in similar fashion over the coming 2-3 weeks.

European Weeklies: July 26-31
European Weeklies: July 30-Aug 4
European Weeklies: Aug 8-Aug 13
CFSv2 Weeklies: July 21-31
CFSv2 Weeklies: July 26-Aug 5
CFSv2 Weeklies: July 31-Aug 10
JMA Weeklies: July 19-25
JMA Weeklies: July 26-Aug 2

The screaming message is that the period of heat this weekend into early next week will transition west by the 2nd half of next week and into the Week 2 time period. Furthermore, though not saying there can’t be periods of “transient” heat still yet the remainder of the summer, the bulk of the sustained heat should be behind us once to the middle of next week.

Additionally, data is bullish on a wet close to July. This makes sense with the northwest flow aloft.

As the crucial late-summer stretch hits and harvest season is on the horizon, there’s reason to believe a favorable precipitation pattern should persist- if not potentially a bit wetter than normal. The wildcard, of course, as is typically the case has to do with the tropics. It only takes 1 or 2 tropical systems with the “right” inland track to provide heavy rains into the inland regions and there’s many reasons to buy into the fact this will be quite a busy “heart” of the tropical season this year. We’ll have to handle those as they come, as the steering currents can vary in significant fashion and there’s no way to accurately pinpoint inland areas most at risk of late-summer/ early fall heavy rain events from these tropical threats. Certainly, if your plans take you down to the beautiful Gulf Coast or Carolina beaches, it’ll be important to pay close attention to the developments and goings on as the season matures…

Stay tuned as we continue to move forward. In addition to our August Outlook, we’ll have more on where we believe the pattern is heading this fall and winter in the coming weeks…

Permanent link to this article: https://indywx.com/thursday-evening-long-range-update-late-summer-and-early-autumn-pattern-on-the-horizon/

VIDEO: Looking Ahead Into Mid-Late Next Week; Reviewing NEW JMA Weeklies Into August…

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VIDEO: Detailed Look At Storm Chances Tonight And A Wet Close To The Month…

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Strong-Severe Storm Potential Late Tomorrow Night Into Predawn Thursday…

High pressure will supply another fantastic day of weather including plentiful sunshine. Humidity levels will remain low today as highs top out in the upper 80s (in case you’re wondering, the average high for July 14th is 85°). Most of our Wednesday will also be nice, but that begins to change Wednesday night…

The Storm Prediction Center includes central Indiana in a ‘marginal’ risk of severe weather both Wednesday and Thursday. This is to account for the potential of a strong-to-severe complex of thunderstorms moving across the state during the overnight period.

This is all thanks to an approaching low pressure system and associated frontal boundary. Eventually, the low pressure system will “wash out” but the boundary will linger in the vicinity, keeping the threat of strong to severe storms across southern and southeastern Indiana during the daytime Thursday.

The vast majority of central Indiana will likely have to deal with thunderstorms late Wednesday night into the predawn Thursday. Given the ingredients in place (50 knot low level jet and dew points that should be approaching 70°) Wednesday night, embedded strong-to-severe thunderstorms are expected. The biggest concerns will be damaging straight line wind potential with these storms.

Forecast radar 4a Thursday.

Locally heavy rain will also be likely as moisture levels rise overnight into Thursday. A quick 1″ of rain can be expected for most of central Indiana with locally heavier amounts where the stronger storms track.

We’ll have more on this and the pattern ahead with our evening video update a bit later. Make it a great Tuesday!

Permanent link to this article: https://indywx.com/strong-severe-storm-potential-late-tomorrow-night-into-predawn-thursday/

VIDEO: Timing Out Storm Threats This Week And Reviewing The Pattern To Close July…

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