textproduct: Huntsville

KEY MESSAGES

Updated at 1010 PM CDT Wed Aug 19 2026

- There is a low chance for strong to severe storms tomorrow afternoon into the evening with the main threat being damaging winds and quarter-sized hail.

NEAR TERM

(Rest of tonight and Thursday) Issued at 1010 PM CDT Wed Aug 19 2026

Afternoon and evening thunderstorms have remained to our south today but moisture and cloud cover are expected to increase overnight as an approaching trough/upper wave nears the area. The increasing cloud cover should help keep fog development at bay tonight but we will see a rise in low chance PoPs as we head toward sunrise. Overnight lows will fall to the low to mid 70s.

Showers and perhaps a few embedded thunderstorms may be ongoing north of the TN River tomorrow morning as the upper wave progresses toward the TN Valley. SPC has maintained a Marginal Risk (level 1 of 5) for strong to severe thunderstorms across the entire forecast area tomorrow with the main threats being gusty to damaging downburst winds. Model soundings do show relatively dry low level air with DCAPE values 1000+ which are typically supportive of convective downbursts. There is a low risk for severe hail, but believe this may be harder to come by given a higher melting level. Highs will top out in the mid to upper 90s with heat indices approaching or exceeding 105 degrees in some locations. Due to uncertainty about afternoon thunderstorm coverage, we will not be issuing a Heat Advisory with this update but do want to stress that these conditions will be life threatening for those especially vulnerable to the heat without proper hydration and adequate cooling.

SHORT TERM

(Thursday night through Saturday) Issued at 1010 PM CDT Wed Aug 19 2026

Although the severe threat is expected to come to an end by late tomorrow afternoon/evening, low to medium chances for rain and thunderstorms will continue tomorrow night through Friday as the aforementioned wave slowly moves east of the area and high pressure begins to push southward from the lower OH River and mid MS River valleys. This will ultimately lead to a drier pattern for the first half of the weekend with slightly less oppressive afternoon heat indices. Temps will fall closer to seasonal norms with afternoon highs in the upper 80s to lower 90s with heat indices below 105 degrees. Overnight lows will fall to the upper 60s/lower 70s with mostly clear/sunny skies after Friday morning.

LONG TERM

(Saturday night through Wednesday) Issued at 1010 PM CDT Wed Aug 19 2026

The long term should remain fairly tranquil under the influence of an upper level ridge and subsequent sfc high pressure from the north. Highs during this time are forecast to continue to reach the 90s with heat indices up to 100 degrees, which will keep us without any heat products on the table. One thing to watch will be a shortwave and subsequent sfc low with an accompanying frontal boundary that may clip the western portion of our area on Monday into Tuesday. For now, have kept PoPs aligned with blended guidance due to uncertainty in the evolution and speed of this front. Therefore, low chances (20% or less) of rain exists Monday into Tuesday. If you have outdoor interests early next week, be sure to check back in for forecast updates.

AVIATION

(00Z TAFS) Issued at 555 PM CDT Wed Aug 19 2026

VFR conditions are forecast through the TAF period, however, at both KMSL and KHSV, MVFR conditions have a low chance of occurring at the end of the TAF period (around 22-00Z) due to a low chance of thunderstorm development and subsequent decreased visibilities.

HUN WATCHES/WARNINGS/ADVISORIES

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