textproduct: Huntsville

KEY MESSAGES

Updated at 834 AM CDT Mon Sep 29 2026

- Medium to high (40-80%) chances of showers and thunderstorms will return to the forecast late this week into the weekend, with locally heavy rainfall the main concern.

- Temperatures will be on the rise through Friday, with increasing humidity yielding a Moderate Heat Risk (Level 2/4) in some areas Thursday and Friday.

NEAR TERM

(Tonight) Issued at 236 PM CDT Tue Sep 29 2026

Under mostly clear skies, temperatures have warmed into the mid 80s across our area this afternoon. Very dry air and subsidence from an upper-level ridge has mixed dewpoints into the mid 40s for most locations leading to a comfortable Autumn day. After sunset, the dry air mass (and clear skies and calm winds) will lead to good conditions for radiational cooling, and we expect our low temperatures to drop into the mid 50s tonight into early Wednesday.

SHORT TERM

(Wednesday through Friday) Issued at 834 AM CDT Tue Sep 29 2026

The aformentioned ridge will again remain in control of our sensible weather both Wednesday and Thursday, with mostly sunny and dry conditions again prevailing. Winds will be veering to a more southerly direction by mid-week, however. This will attempt to modify the drier air mass, advecting Gulf moisture back into the region. As a result, we'll see an uptick in dewpoints into the 50s on Wednesday and the upper 50s to lower 60s by Thursday. Combined with high temperatures returning to the lower 90s, this would create Moderate (Level 2/4) heat impacts by Thursday. Additionally, this will also result in much warmer nights (especially Thursday night as cloud cover moves in) with lows remaining in the mid to upper 60s.

LONG TERM

(Thursday night through Monday) Issued at 1003 PM CDT Mon Sep 28 2026

By the start of the long term, a pattern change will be on our doorsteps. Aloft, a long wave through will be approaching from the west as ridging departs off the east coast. At the surface, this will be accompanied by a surface cold front pushing across the central CONUS. By Thursday night into Friday we will find ourself sandwiched between high pressure to our east, and an approaching cold front to our west. This will place us solidly within southerly flow. This southerly flow will work as a pipeline for moisture from the Gulf up into the TN Valley. At the surface, dew points look to return to the 70s, while aloft, PWATs look to push well above the 90th percentile for early October (2"+).

This moisture will prime us for a very wet weekend. What remains somewhat uncertain is how much forcing will present as the parent trough looks to weaken through the weekend as it moves through the TN Valley. This gives us some pause when considering weekend rain chances. The current question is if high rain chances will be prolonged over a wide spread area or if shower and storms will be more scattered creating a more localized concern. Kept blended guidance for this forecast cycle with medium to high rain chances in place Friday afternoon through Sunday afternoon. Flooding concerns will be highly dependent on the location of prolonged rain and speed it falls. If the rain falls at a steady rate, local drainage may be able to handle it with minimal problems. If stronger storms develop, periods of heavy rainfall could lead to some flood concerns. Please check back for updates.

AVIATION

(18Z TAFS) Issued at 1223 PM CDT Tue Sep 29 2026

VFR conditions with light winds and a mostly clear sky is forecast through the period.

HUN WATCHES/WARNINGS/ADVISORIES

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