textproduct: Huntsville

KEY MESSAGES

Updated at 1038 PM CDT Thu Sep 24 2026

- No impactful weather through the seven day forecast period.

NEAR TERM

(Rest of tonight and Friday) Issued at 1038 PM CDT Thu Sep 24 2026

A convergence boundary continues to linger over northern Alabama near the I-65 corridor this evening. Near this surface boundary, mostly cloudy conditions with CIGS between 5000 and 7000 feet have redeveloped over the past few hours. Winds NW of the boundary have remained stronger than guidance with most areas see winds between 5 and 10 mph with some higher gusts. South of the boundary, very light or calm winds have been fairly widespread. Luckily, cloud cover in those areas has kept fog from forming so far.

Several higher resolution models do show this cloud cover remaining in place through much of the overnight hours. These winds (though skies have been clearer west of the I-65 corridor) should keep fog from becoming very widespread or dense. However, some isolated pockets of thicker fog could occur where skies remain clear the longest overnight. Expect some cooler and drier air to eventually advect into the area towards daybreak from the east. This should help lower temperatures/dewpoints into the upper 50s to lower 60s (especially in NE Alabama and Tennessee) and should help mitigate fog formation some as well. Lower cloud cover will likely move into the area with this cooler/drier air.

Most guidance does break up cloud cover in the afternoon on Friday, mainly west of the I-65 corridor. This should allow for some insolation and temperatures to climb into the 80 to 85 degree range in those locations. Further east, upper 70s to lower 80s will be more common.

SHORT TERM

(Friday night through Sunday) Issued at 1038 PM CDT Thu Sep 24 2026

It looks like a break from the cloud cover develops Friday afternoon into the weekend. With light winds expected later Friday night into Saturday morning, a better opportunity for more widespread fog development could develop. However, drier air will also counter that a bit. Lows look to drop into the mid to upper 50s with clearer skies in place.

During the day on Saturday, more insolation should allow temperatures to climb a bit higher during the day, despite the cooler/drier air advected into the region. Highs should reach the 80 to 85 degree mark in most areas, except maybe the highest elevations.

Not much change expected into Sunday. Highs should remain primarily in the 80 to 85 degree range with mainly partly cloudy conditions continuing.

LONG TERM

(Sunday night through Thursday) Issued at 1014 PM CDT Thu Sep 24 2026

Our coolest night may be Sunday into Monday morning. Guidance is hinting at some upper 40s possibly for lows in southern middle Tennessee and portions of NE Alabama. Some patchy fog may be possible as well given lighter winds expected towards daybreak on Monday.

A large deep layer cyclone off the New England coast will become an open wave and begin ejecting northeast, allowing a trough axis to drop southeast through the TN Valley on Monday. At this point, it appears to be a dry trough with no precipitation expected. A 5h ridge will then shift east into the lower MS Valley and western Gulf of America on Tuesday into Wednesday, and then further east into the Southeast U.S. and southwest Atlantic basin by Thursday. Thus, a warming trend is expected with highs that begin the week in the lower to middle 80s, warming into the upper 80s to around 90 during the middle part of the week. The medium range models then diverge on the handling of a southwest U.S. upper low evolution. Even so, the low chances of showers or thunderstorms suggested by the NBM may be due more to generalized moistening and destabilization due to increased southerly flow in advance of this trough. The ECMWF is stronger with the ridge and delays the shift of this trough east, which may equate to a warmer scenario late next week.

AVIATION

(06Z TAFS) Issued at 1135 PM CDT Thu Sep 24 2026

VFR CIGS continue to be more widespread near the KHSV terminal eastward near a surface boundary. Northerly winds 5 knots or less continue to occur west of this boundary. Further east, mainly calm winds are in place. Have more confidence VFR CIGS will hold on a KHSV than KMSL overnight. Thus, left predominate MVFR VSBYS in place at the KMSL terminal after 08Z with a tempo group for IFR VSBYS between 08Z and 12Z. Further east at KHSV, only kept a tempo group for MVFR VSBYS in place from 08Z through 12Z. Drier air moving into the terminals from the east towards daybreak should also help to keep fog more at bay near and east of the I-65 corridor. Expect predominately MVFR CIGS to develop around or after 13Z at both terminals. VFR conditions should return a bit sooner at KMSL as cloud cover breaks up Friday afternoon.

HUN WATCHES/WARNINGS/ADVISORIES

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