Category: Long Range Discussion

A Different Kind Of “Dog Days” This Year…

Late July and August have been known to produce some serious heat around these parts from time to time. However, it continues to look like this will not be the case this year.

We’ve already discussed the impacts of the negative EPO. (By the way, modeling continues to take the EPO even more strongly negative with every passing update). This supports the cooler idea we have for early August.

Now we see the PNA forecast to trend more positive through the better part of early August. This, too, supports the cooler pattern that will be with us through the period.

It should come as no surprise to see the models trend stronger with the eastern trough in the Weeks 2-3 time period. This period will likely feature a couple of strong frontal passages that serve as a reminder that the fall season is just around the corner.

Note the latest GEFS deepen the trough from the Day 5-10 period to Days 10-15.

Not only will this serve to provide a rather lengthy period of cooler than normal temperatures through the 1st half of August, but should also help inject wetter conditions to boot (in large part due to the frequent nature of frontal passages).

At a time of year that can feature brutal periods of heat and/ or dry conditions, it sure continues to be the exact opposite this year!

Enjoy your Saturday, friends!

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VIDEO: Dry Weekend; Looking Ahead To The Cool Pattern That Will Return Early-August…

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VIDEO: Reinforcing Cool Pattern Develops Through Early August…

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All-Access Evening Video Update: More Early August Chatter…

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Dinnertime Rambles: Quiet Through The Short-Term And Longer Range Musings…

I. Drier air continues to surge south and with it will come much cooler temperatures overnight into Tuesday morning. We still believe most central Indiana reporting sites will fall into the middle 50s Tuesday morning. Turn off that A/C and open up those windows!

II. Weak upper level energy will push south and lead to isolated to widely scattered instability-driven showers across northern parts of the state tomorrow afternoon. A couple of these quick-moving showers could scoot into central Indiana, but we continue to believe most will remain free of any precipitation tomorrow.

III. Overall, we’re looking at a very quiet weather pattern through the weekend with an extended period of dry weather, thanks to high pressure. Temperatures will slowly warm from the unseasonably cool and refreshing levels into mid week to more of a seasonal feel this weekend.

IV. As we look ahead, the upper air pattern should transition to more of a classic summer-like regime to open August. However, data shows the ridge continuing to “retrograde” west with time, resulting in a period of wetter conditions with a northwest flow aloft Days 10-15 (roughly Aug 2nd- Aug 7th). It’s always good to see agreement between the European and GFS ensemble products below.

V. Research continues on the upcoming fall and winter and it’s becoming increasingly difficult to ignore the warm sea-surface temperatures across the northeastern Pacific. Interestingly, most seasonal model data maintains this warm “blob” into the late fall and early winter. Note where we are currently (center photo) vs. where the projection off the UKMET (top left) for Oct-Dec and European (bottom left) for Nov-Jan.

While only 1 of several ingredients used in building our seasonal outlooks, this can promote the tendency for more persistent western ridging and downstream trough (associated colder pattern) across the East…

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