Note how on Wednesday’s plot, the red and green lines are fairly close together throughout the lower part of the atmosphere. In essence, that shows the lowest several miles were moist that morning, but a significant change is noted by Thursday morning, with a gap appearing between those two lines, indicating some drier air roughly one to two miles above the surface. That’s evidence of the SAL arriving locally. It also represents a profile supportive of strong and damaging winds should any storms develop. I’ll spare you a deep dive into the meteorology for now, but suffice it to say that layer of dry air causes evaporation within a storm, with the resultant cooler, heavier (more dense) air being transported to the ground in the form of damaging winds. That’s why I think the SAL contributed to Thursday’s severe weather; it produced a layer of dry air one to two miles above the surface.
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June 27, 2020 at 03:39AM
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The link between Saharan dust and Thursday’s severe weather in Baton Rouge area - WAFB
"severe" - Google News
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