Here's a look at afternoon water vapor imagery. Lots of dry air at the mid levels is located over us here in the GTR and normally, we would expect sunshine with this...but we have an interesting setup today...
No doubt, the morning sounding from Jackson, MS confirms the presence of dry air in the mid levels that the water vapor imagery is showing us. However, if we look closest to the surface, we see nearly saturated conditions and fairly moist conditions all the way up to almost 850mb. After (above) that, a hydrolapse occurs and there is a significant decrease in moisture. This means all the moisture is located in the lowest 5k feet of the atmosphere.
Low and behold, the visible satellite imagery shows lots of clouds particularly focused in the eastern half of Mississippi. There are a lot of factors associated with this channeling of moisture. First...
The remnants of Karen have actually developed a coastal low off the Carolinas. Air channeling on the west side of this feature is being funneled southward then turning to the west, resulting in an easterly to southeasterly flow for us here in the GTR. That's increasing our moisture just enough to result in low-level clouds. Furthermore:
Here's the 294K isentropic surface. It appears moisture located on this surface juxtaposed with the wind fields associated with this surface is resulting in isentropic upglide across our state, thereby reinforcing the potential for clouds in our area.
For tomorrow, that coastal low is persisting and it depends on our surface wind direction as to whether or not the clouds will stick with us tomorrow. It looks like that our overall wind should remain the same, so we may can expect additional low clouds that are slow to mix out tomorrow as well.
IW
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