textproduct: Huntsville

KEY MESSAGES

Updated at 859 PM CDT Sat Sep 12 2026

- NWS Heat Risk will remain in the Moderate category throughout the forecast period as max temperatures rise back up into the mid 90s areawide beginning on Sunday.

NEAR TERM

(Rest of tonight and Sunday) Issued at 859 PM CDT Sat Sep 12 2026

Mostly clear skies have returned to the area after afternoon showers and thunderstorms impacted the area. The main concern tonight will be patchy fog as earlier rainfall moistened up the near sfc levels and combined with clearing skies and calm winds will be conducive for patchy dense fog. While no fog can be seen currently over the forecast area yet, areas across the lower Appalachians are already seeing valley fog development as evident by current satellite and ground observations. Conditions will continue to be monitored overnight in case a Dense Fog Advisory is needed. Otherwise, expect lows to fall to the mid 60s to lower 70s.

Drier air and large scale subsidence will become the dominant factor on Sunday as the TN Valley sits on the fringe between an amplifying upper trough over the Great Lakes and broad ridging across the Great Plains. Slight height rises will keep warm conditions around despite the lower humidity as clear skies allow temperatures to rise into the low to mid 90s. No heat related headlines are planned for this time as lower humidity will keep heat indices topping out near 100 degrees. While this is just below Advisory criteria, this heat is still dangerous for those especially vulnerable to heat as well as those without proper hydration and cooling.

SHORT TERM

(Sunday night through Tuesday night) Issued at 859 PM CDT Sat Sep 12 2026

Dry weather will continue through the short term period as the aforementioned ridge tracks east and low level flow is more influenced by drier air over the Appalachians rather than fetch from the Gulf. The main impact in the short term will continue to be the heat, with afternoon highs reaching the mid to upper 90s, especially along and west of I-65. Moderate to Major Heatrisk conditions will exist through Tuesday with warm overnight lows in the lower 70s providing little relief and compounding the heat danger. Dewpoints in the lower 70s will bring heat indices up to the 100-106 degree range each afternoon. While these conditions do not appear to be widespread enough to warrant an Advisory at this range, trends will continue to be monitored in case heat indices around that 105 degree threshold become more likely. Please continue to practice heat safety, summer is not over yet!

LONG TERM

(Wednesday through Saturday) Issued at 859 PM CDT Sat Sep 12 2026

The start of the long term will offer much of the same as ridging remains anchored over the TN Valley and high pressure sets up along the eastern seaboard. With high pressure both at the surface and aloft, dry and hot conditions will prevail with highs soaring into the 90s each afternoon. ESE flow off the Atlantic will keep dew points in the high 60s to low 70s. This will push heat indices near and above triple digits with heat being the primary concern through the long term forecast. Make sure to continue to practice proper heat and sun safety.

By Friday, models begin to diverge as the ridging over the SE looks to retrograde. A weak front looks to approach from the NW however significant disagreement exits in the models regarded if and when this front could come through. As such, ensemble spread increases in Friday and significantly on Saturday regarding our high temperatures, nearly nearly a ten degree spread widely shown in the models. Should the front near by the end of the week, this would increase cloud cover and rain chances, and decrease temperatures. If the front stalls to our NE, hot and humid conditions will prevail through Saturday. Please check back for updates.

AVIATION

(00Z TAFS) Issued at 545 PM CDT Sat Sep 12 2026

VFR conditions are forecast to persist for most of the period with mostly clear skies and light winds outside of the potential for fog. Lower vsbys were included for both sites between the hours of 10-15z where MVFR or lower conditions may occur.

HUN WATCHES/WARNINGS/ADVISORIES

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