textproduct: Huntsville

KEY MESSAGES

Updated at 1006 PM CDT Sun Oct 11 2026

- A Dense Fog Advisory has been issued for our NE Alabama counties and our southern middle Tennessee counties until 10 AM. This may need to be expanded further west overnight.

- Above normal temperatures are forecast Monday through Thursday, before Fall weather returns by next weekend.

NEAR TERM

(Today) Issued at 230 AM CDT Mon Oct 12 2026

With clear skies and calm winds, dense fog has developed in NE AL and southern middle TN. As such, a Dense Fog Advisory is in effect for those locations until 10 AM this morning. Elsewhere, fog has been slowly to develop, yet low dew point depressions may give way to area wide dense fog over the next few hours. Expansions to the Advisory will be done as necessary.

Fog may be slow to dissipate this morning thanks to calm conditions under high pressure influence. Through the day high pressure and ridging will build at the surface and aloft to our SSW. This will keep winds light and skies clear after the fog lifts. Unfortunately, the high pressure will also allow temps to heat up a decent bit with highs 5-10 degrees above season norms in the mid to high 80s. Dry air aloft may support some mixing this afternoon lowering afternoon RH into the 30-40% range. We will keep a close eye on dew points through the day should they need to be adjusted from the current forecast.

SHORT TERM

(Monday night through Wednesday) Issued at 1006 PM CDT Sun Oct 11 2026

Light winds are expected again Monday night. However, with higher afternoon temperatures and evaporative effects through the day, denser fog formation is not as certain. Some patchy fog along with a lower threat of denser fog in typical fog prone valleys/locations can't be ruled out. Lows should again drop into the 55 to 60 degree range in most locations, with some warmer temperatures due to an inversion possible in higher elevations.

Mixing should start much earlier in the morning on Tuesday based on forecast soundings and may mix up to dewpoints around or slightly below zero. This should drop dewpoints more markedly. Again, kept with CONShort, but it may end up lower than that. Highs should be slightly warmer too climbing into the mid to upper 80 in most locations. The highest elevations may remain a bit cooler in the lower to mid 80s. This should drop afternoon RH values to at least between 30 and 35 percent.

Tuesday night looks very similar with maybe a more intense ridge/valley split in low temperatures with drier air lingering in valley locations and SW flow pushing into the area from the west ahead of a cold front stretching from Indiana SSW into eastern Oklahoma. Lows in higher elevations will likely be in the 60 to 65 degree range with lower elevations in the mid to upper 50s or so.

The upper level ridging remains strong on Wednesday, despite the cold front pushing east southeast closer to the area. However, the upper ridge will likely slow down the advance of the cold front. Highs with abundant sunshine should climb a bit higher into the 85 to 90 degree range. Not sure mixing will be quite as dominant in the afternoon given increasing low level flow from the southeast ahead of the front to our north. However, some afternoon mixing will likely occur and drop RH values to around 40 percent in many areas.

LONG TERM

(Wednesday night through Sunday) Issued at 1006 PM CDT Sun Oct 11 2026

Dry condition and pleasantly warm mid October warmth is forecast to continue starting the 2nd half of the week. Surface high pressure over the SE CONUS will provide a southerly flow across much of the Deep South. After a warm Wed with highs in the mid/upper 80s, lows Wed night should cool to around 60s sheltered valleys to mid 60s near large bodies of water. A last period of unseasonably warm conditions are expected Thu, with highs rising into the low/mid 80s mountains to around 90 over parts of north central and NW Alabama.

Earlier in the week, a system impacting parts of the Great Basin and Intermountain West (infused with moisture from ex tropical system Rachel) should move east of the central Front Range Wed-Thu. This system will move rapidly to the ENE, and reform over the Great Lakes on Fri. A cold front trailing south and west of this system should move across the Tennessee Valley late Thu into Fri. Given that most of the dynamics associated with the parent low will stay well to our north, the usual area of showers accompanying the front will actually fade as they approach the Valley from the west. So except for winds becoming NW on Fri, this frontal passage at the moment appears will be a dry one. There were some timing differences between the model camps with the front. The 18Z GFS was the quickest, bringing the boundary across before daybreak Fri, while the ECMWF and Canadian did not bring it through until after midday Fri.

Regardless, once the front passes temperatures will chill notably, just in time for the upcoming weekend. After lows Thu night mainly in the low/mid 60s, highs on Fri will be a little cooler in the low/mid 80s, as high pressure from the NE Pacific and Canada builds to the SE. Colder conditions will most certainly be felt Fri night, as lows tumble into the mid 40s to around 50. Stiff northerly winds of 10-20 mph and higher gusts will make it chilly for those participating in outdoor activities. The cooler trend continues Sat, with highs mainly in the mid 60s. Normal high/low temperatures Sat are around 75/50. The coldest air of the season should produce lows by Sun morning from the mid/upper 30s to low/mid 40s (places near large bodies of water that are still relatively warm). The lower end of this could bring a frosting risk for the coldest spots, something we'll monitor. Cool conditions continue next Sun with highs from the mid 60s to lower 70s.

AVIATION

(12Z TAFS) Issued at 534 AM CDT Mon Oct 12 2026

There is a low chance of Fog impacting either terminals through around 15Z. Due to low confidence, this has not been included in the TAF, thus amendments will be made as necessary. After 15Z VFR conditions will prevail for the duration of the TAF period at both terminals.

HUN WATCHES/WARNINGS/ADVISORIES

AL...Dense Fog Advisory until 10 AM CDT this morning for ALZ006- 008>010.

TN...Dense Fog Advisory until 10 AM CDT this morning for TNZ076-096- 097.