After an unseasonably cool weekend, significant late season heat will return next week.
Note the ridge expand over the eastern portion of the country next week.
To no surprise, the EPO pops positive and this really helps drive the warm mid-September pattern.
The question then becomes “how long does the late season heat last?” As the EPO trends negative, cooler times would be favored as we move into late September. We’ll keep a close eye on things.
For now, those not ready to say goodbye to summer will be in luck next week with highs around 90 and lows in the upper 60s to lower 70s…
A few opportunities (today and Sunday) for showers can be expected over the next few days, but these won’t amount to much and some may not see any rain of significance. Better rain and storm chances will return the middle of next week.
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The short-term period will be dominated by a cooler than normal theme as we put the final touches on August and open September.
This will only serve to push those already below normal for the month even cooler than average and turn a lot of the area bordering these cool anomalies “over the top” from seasonal to slightly cooler than normal by month’s end. Meanwhile, warmth will continue to dominate along the coasts
Here’s a look at month-to-date temperature anomalies, compared to our initial August forecast (issued July 21st).
The negative EPO suggests any sort of warmth will be hard to come by and transitional through the 1st 1/3 of the month.
After a wet time of things as of late, we’ll dry things out the middle part of the week. A couple of moisture-starved and rather weak systems may lead to scattered showers Friday and again at times over the holiday weekend, but significant rain isn’t anticipated. We would agree with the drier than average theme displayed from the most recent CFSv2 Weekly product to open September:
The one potential “fly in the ointment” to the dry open to September would be whatever comes from current Tropical Storm Dorian (moving through the Windward Islands as of this update). There’s relatively good model agreement that Dorian will move northwest and eventually be in a position to impact the eastern Florida coastline by the Labor Day weekend as a Tropical Storm.
It’s far too early to speculate from this point, but the pattern may promote Dorian to then track into the Gulf of Mexico. While unlikely Dorian’s remnant moisture ever impacts our immediate region, this will be something that we’ll keep an eye on over the next week to 10 days.
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Month-to-date, a negative EPO (East Pacific Oscillation) has dominated. The result has been for a cooler regime across the central into the interior Northeast.
That said, big changes are taking place with the EPO and it’s set to swing strongly positive as we head into the 3rd and 4th week of the month.
This correlates to a MUCH warmer/ hotter pattern across not only our portion of the country, but a large chunk of the Lower 48.
To no surprise, we see a building heat wave showing up on the medium to long range models with more consistency beginning this weekend, continuing into next week. This is the type regime that can lead to lows in the lower 70s and highs in the lower 90s for several consecutive days.
How long does the warmer pattern last? It’s all up to the EPO. As long as that baby stays positive, bet on the warmth.
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