9/20 – Rob’s HOT/HUMID Afternoon Forecast
We continue to be under the control of a mid to upper-level high pressure across the lower MS Valley region. To our east, a small and weak mid-level low/trough has pressed south into the NE GOM. Additionally, we will begin to transition into a developing onshore flow at the surface and low-levels, which will help to increase moisture from the Gulf later today.
It will be another day of hot temperatures across the area as Highs today will reach the lower 90s, with the heat index between 102-105 in some spots.
By Friday and into the weekend, a developing upper-level low will cross the FL peninsula from the east, and also retrograde westward into the central Gulf. It is important to note that this is NOT a tropical system, with cold-core upper-level features associated with it. The only impacts this system may have across the northern Gulf Coast will be increased dynamic support for continued afternoon showers and storms, some of which may be locally heavy given increased Gulf moisture transport across the area. Early to the middle part of next week, increased rain chances will persist, with the possibility of cooler, near average temperatures through mid-week and perhaps lasting through late week.