Submitted by Daniel Crawley: (@SoApps1979)
Good Wednesday morning to everyone, significant changes are in place for the weather here in the Western Carolinas. Our region going back to last weekend was stuck in the middle of a weather pattern that consisted of high moisture content with little to no capping in place. It all resulted in daily thunderstorms that brought a few bouts of severe weather but the bigger story was localized excessive rainfall that occurred especially in the foothills and close to the Blue Ridge.
Thankfully for all parties affected the weather pattern chance is underway and in a transition mode. As of early this morning you can see on water vapor that a front moved through the Western Carolinas Tuesday evening which ended the showers and storms. It's not really a cold front more than it is a moisture boundary. The initial front will help end the storm chances for today, meanwhile back across the Plains States is a secondary front that will deliver even more refreshing air starting on Thursday and going into the weekend.
A look at the precipitable water values this morning shows it even better how the deep tropical moisture (PWAT's 1.5-2 inches) are exiting the East Coast. Then as you get further north you can see an even drier and cooler airmass, of Canadian origin that's behind the secondary front that we made reference to on the water vapor image....
For today's weather, high pressure located across the Plains will begin to slowly influence the weather here in the Southeast. With the lower moisture content and northwest surface flow, storm chances should be close to non-existent for today. With the late August sun angle it will be a warm Wednesday with high's expected to be in the mid 80's...but again the big difference is a more comfortable feel to the air compared to the muggy conditions earlier.
Surface high pressure will continue to approach from the west tonight establishing a stronger hold on the weather pattern across the region, with increasing dry air pushing in, look for lows tonight to drop down into the upper 50's to low 60's, a good 10-12 degrees cooler than previous morning values. If you are heading toward the mountains tonight, 40's and 50's are expected by first thing Thursday morning...
Speaking of Thursday, high pressure will be dominating the weather scene as it will be centered just to our north and west by the afternoon hours pumping cooler air on northerly winds. High temps on Thursday are going to be pleasant and quite honestly it was be refreshing considering the number of hot and humid days we have seen this summer. High's will reach the lower 80's with plenty of sunshine...
High pressure will be overhead by Thursday night and that will put us at the zenith of this weather change. Temps will fall off pretty fast after sunset and by daybreak Friday we will see widespread 50's across the Foothills and Western Piedmont...a true taste of fall weather!
This nice weather looks to have staying power through most of the upcoming weekend. However that said, do not mistaken this for the end of summer as we may see above average temperatures return sometime next week.
Have a great day!