textproduct: Huntsville

KEY MESSAGES

Updated at 1103 AM CDT Wed Aug 26 2026

- An organized cluster of thunderstorms is expected to spread southeastward into the region this afternoon, bringing locally damaging winds, frequent lightning and heavy rainfall. Impacts will likely be greatest across the western half of the region.

- Low to Medium chances for showers and thunderstorms will continue from tonight through Thursday night, but should become focused across the southeastern counties on Friday. Brief gusty winds, frequent lightning and heavy rainfall will be the main impacts.

NEAR TERM

(Tonight) Issued at 152 PM CDT Wed Aug 26 2026

The MCS has moved into portions of Southern Middle TN and additional storms have fired off of a stationary boundary that is close to the AL/MS line. These storms are sub-severe at this time. Most recent wind observation from the storm near Florence was 50 mph and pretty heavy rainfall. These two complexes just merged near Florence and moving eastward ~20 mph. With the slow pace and some storms beginning to train, there is starting to be a concern for flooding as well. There is less instability as you move eastward, however still awaiting the shortwave to move through which could reignite the intensity of some storms over the next few hours.

Once the storms move through later this evening, the next item of concern will be fog. Density will depend on who has received rainfall and how much. So use caution when driving tonight into tomorrow morning. Overnight lows will be around 70 degrees.

SHORT TERM

(Thursday through Saturday) Issued at 1103 AM CDT Wed Aug 26 2026

Tomorrow, another shortwave will bring a low chance (20-30%) of additional showers and thunderstorms, during the early morning hours but mainly during the afternoon. A cold front will finally move through Thursday night into Friday and bring another chance for showers/storms, but models indicate precip chances should exit the southeast portion the CWA during the late afternoon hours. Drier conditions are expected as the frontal boundary seems to stall out moreso in Central AL and a sfc high in the OH Valley builds in behind it. If the front doesn't stall as far south as forecasted, POPs will need to be adjusted to accommodate. Otherwise, highs will be in the upper 80s (higher plateau areas) to lower 90s elsewhere on Thursday and Friday with a slight warm up on Saturday.

LONG TERM

(Friday night through Tuesday) Issued at 953 PM CDT Tue Aug 25 2026

The aforementioned frontal boundary should be to our south by Friday night into early Saturday, allowing mostly dry conditions to take over the area. However, as sfc high pressure resides over the Appalachians and the boundary stalls to our south, continued low chances for shower/thunderstorm development will exist in the eastern zones of our CWA through the weekend. This is low confidence due to model uncertainty in the exact evolution of the frontal boundary as it shifts south of the area, however, trends have continued to stall it before gradually lifting it slightly back northeastward through the latter part of the weekend. Have continued with blended guidance for now. Otherwise, high temperatures are forecast to reach the low to mid 90s with heat indices up to around 100 degrees as an upper level ridge continues to influence the region from the west. If you have outdoor plans, be sure to seek shade and stay hydrated to avoid heat illness.

AVIATION

(18Z TAFS) Issued at 1245 PM CDT Wed Aug 26 2026

TSRA is on the doorstep of KMSL and it will still be an hour or two until KHSV sees any convection. Heavy rainfall can reduce VIS to temporarily to MVFR. Depending on how much and where the rain occurs will depend on fog potential for tonight. With this forecast package, kept in MVFR VIS for fog overnight, however models suggest it could briefly get as low as IFR.

HUN WATCHES/WARNINGS/ADVISORIES

AL...None. TN...None.