Category: Long Range Discussion

Thursday Morning Rambles: Tropical Air Gets The Boot; Eyeing A Warm Stretch Of Weather Through The 1st Half Of June?

Our short-term weather pattern will be dominated by an upper level low (this morning) and a cold front (tomorrow). High pressure will build into the region over the weekend and help supply gorgeous conditions.

The best opportunity for widespread rain over the next week will take place today as the upper low impacts the region. With a tropical airmass in place, this feature will be able to produce a good soaking for most of central Indiana. Widespread moderate rain this morning will continue for the next few hours before being replaced with more scattered activity during the afternoon/ evening.

Most central Indiana neighborhoods can expect an inch of rain today with locally heavier totals.

The next feature we’ll contend with is the cold front itself and it’s still slated for a Friday passage. Scattered showers and storms will remain possible ahead of the boundary but coverage shouldn’t be nearly as widespread as what we’re seeing this morning. Once the front blows through tomorrow afternoon, much drier and cooler air will arrive and stick around for a few days.

Cool and refreshing Canadian air will arrive just in time for the weekend.

Dry conditions will stick around through the weekend and into early next week to result in perfect weather to get some of those outdoor chores knocked out before the warm, muggy stuff returns.

Speaking of that, as we look ahead, we’ll replace the refreshing air with a return of warmth and humidity during the 2nd half of next week. Note how the European ensemble shows the transition.

The JMA Weeklies (fresh in this morning) also show the warmth that looms through the better part of the 1st half of June.

We’ll have to keep close tabs on exactly where the upper level ridge sets up in the Week 2 time period. This will mean the difference between “splash and dash” storm coverage as the mugginess returns vs. more widespread, organized activity in what would be a northwest flow around the periphery of the ridge. Stay tuned.

Permanent link to this article: https://indywx.com/thursday-morning-rambles-tropical-air-gets-the-boot-eyeing-a-warm-stretch-of-weather-through-the-1st-half-of-june/

VIDEO: Better Short-Term Storm Chances; Meteorological Summer Looms…

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VIDEO: Warm And Humid Memorial Day Weekend; Timing Out Features Into Mid-June…

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Long Range Update: Warmth Once Again Takes A Back Seat To Cooler Times; Drier Open To June?

With meteorological summer looming around the corner, will the pattern follow suit? At least in the short-term, warmth and humidity will have things feeling very much like summer, but this warmer regime likely won’t hold. The culprit? You guessed it- developing negative EPO, strongly positive PNA, and the MJO re-amplifying with eyes sets on the cooler phases to open June.

After a chilly May (month-to-date), most will welcome this weekend’s heat and humidity with open arms! This is courtesy of finally kicking the “cut off” low to the curb and replacing its’ influence with an upper level ridge. Scattered shower and thunderstorm activity is possible through the short-term, but coverage will be of the “splash and dash” variety- very typical of summer-time!

This warmer regime will be fleeting as a combination of ingredients align in a manner to drive cooler, more refreshing air back into the region as we close May and open June. Most notably this is being driven by a negative EPO, strongly positive PNA, and the MJO set to roll through Phases 7 and 8 during said period.

Accordingly, we note the models shifting things up quite significantly as we go into the Week 2 time period (May 29th-June 4th).

The cooler regime will likely also come with a drier overall pattern to open June, at least compared to average.

Permanent link to this article: https://indywx.com/long-range-update-warmth-once-again-takes-a-back-seat-to-cooler-times-drier-open-to-june/

Long Range Update: Heat Comes In Spurts, But Still A Long Way Off From Sustained Warmth…

After a chilly May featuring all-time record cold to begin the month, the flip to warmer air has been welcome by many over the past 24 hours. This warmer regime will continue into the weekend before getting beaten back next week. This is due to a closed off upper level low that will actually manufacture it’s on chill across the Ohio Valley, Mid-Atlantic, and Southeast during this time frame.

Sometimes it can be like pulling teeth to get these kind of features to leave and models can struggle (case in point, this upper low was originally modeled to be located over Nova Scotia- NOT the Southeast and Mid-Atlantic)!

Nevertheless, we believe the one time expected surge of heat next week will only be a scenario of “delayed, not denied.” By the time we head into Memorial Day weekend, we continue to believe legitimate summer warmth will move in (85°-90° stuff).

The new CFSv2 agrees with the European ensembles above.

Longer range (last few days of May and early June) will depend heavily on what goes on with a combo of the MJO and EPO/ PNA. 2 of 3 of these signals argue for cooler air to return during that time period.

We shall see how it plays out, but our official lean is towards the cooler side of things after the Memorial Day heat. From a precipitation perspective, after the short-term wet period, overall dry conditions are set to return as we wrap up May.

Permanent link to this article: https://indywx.com/long-range-update-heat-comes-in-spurts-but-still-a-long-way-off-from-sustained-warmth/