Area Forecast Discussion
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
704 FXUS64 KMRX 082329 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 729 PM EDT Fri Aug 8 2025 ...New AVIATION... .DISCUSSION... Issued at 1238 PM EDT Fri Aug 8 2025 Key Messages: 1. Isolated to showers and thunderstorms will affect a few spots over the weekend especially the higher terrain, then rain chances will increase for next week. 2. Temperatures will generally be around seasonal normals. Discussion: The weak upper trough that has been over our area will give way to upper ridging for the weekend into early next week. Limited moisture and instability will keep afternoon convection coverage mainly isolated and more likely to occur over the higher terrain during the weekend. A more southerly component to the low level flow will allow for an increase in moisture next week, along with an increase in diurnally driven showers and thunderstorms. By mid-week models are generally showing some short wave energy affecting our region while an upper trough moves across southern Canada and the Great Lakes, temporarily suppressing the ridge. This would lead to more coverage of convection during the Tuesday/Wednesday/Thursday time frame, although timing is uncertain. Behind this short wave, upper ridging will reassert dominance over the region, although chances for mostly diurnal showers and storms will continue Friday. Temperatures will be a bit higher than recent days for the upcoming weekend through the bulk of the work week, but will generally not be far from seasonal normals. && .AVIATION... (00Z TAFS) Issued at 722 PM EDT Fri Aug 8 2025 Isolated showers will dissipate over the next few hours. Some MVFR CIGs are possible in the morning hours especially near CHA where it rained but confidence is low. Tomorrow afternoon showers and storms will be isolated with very low chances at each terminal. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 69 89 69 89 / 20 10 10 20 Knoxville McGhee Tyson Airport, TN 68 89 67 90 / 20 10 10 10 Oak Ridge, TN 68 89 68 90 / 10 10 10 10 Tri Cities Airport, TN 62 86 62 88 / 10 10 10 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && $$ DISCUSSION... AVIATION...McD