textproduct: Huntsville

KEY MESSAGES

Updated at 1148 AM CDT Sun Sep 6 2026

- A Heat Advisory remains in effect through 8 PM this evening due to a Major Heat Risk, and afternoon heat indices rising up to 105-109 degrees in portions of the forecast area.

- A conditional, low risk of strong to severe thunderstorms is forecast this afternoon as a weak front moves through the region. Localized damaging wind gusts are the main threats posed by the stronger storms.

- A break in heat impacts this week as a slightly cooler, drier air mass works its way into the region.

NEAR TERM

(Rest of Today and Tonight) Issued at 813 AM CDT Sun Sep 6 2026

Convection that occurred overnight has finally waned as we begin the day across the Tennessee Valley. Cloud cover will begin to thin out this morning and the end result will be another hot/humid day, with Major (Level 3/4) heat impacts across the region. Daytime highs will again reach the 95-100 degree range, with peak heat index values between 105-109 degrees. A Heat Advisory remains in effect until 8 PM this evening.

The other thing we'll need to watch is a low chance of diurnally driven convection this afternoon (20-30%) as convection may redevelop on a remnant outflow boundary and/or from forcing provided from a backdoor cold front. Either way, the environment will be favorable for a few of these storms to become strong to marginally severe, with downbursts again the primary threat (given the very steep low-level lapse rates, mid-level dry air, and DCAPE values around 1400 J/kg). The main window for this activity 2 to 10 PM -- and while coverage likely won't be all that high we will have to watch every storm that develops closely. After convection wanes this evening, more tranquil weather will occur overnight with lows in the lower 70s and a slightly more drier air mass moving in by early Monday morning.

SHORT TERM

(Monday through Tuesday) Issued at 813 AM CDT Sun Sep 6 2026

A slightly cooler, drier air mass will move into the region in wake of the aforementioned front early this week. This will knock daytime highs back a few degrees (upper 80s to low/mid 90s) and lower NWS Heat Risk values to Moderate (Level 2/4). Thus, heat products are not anticipated either Monday or Tuesday. However, be sure to continue practicing heat safety to avoid heat illness if spending time outdoors. Additionally, other than a rogue storm or two over the terrain of northeast Alabama, a vast majority of locations will remain dry on Labor Day, with PoPs around 10-20% -- and lowering to 5-10% on Tuesday.

LONG TERM

(Tuesday night through Saturday) Issued at 955 PM CDT Sat Sep 5 2026

As the upper level ridge remains the main influence over the area through the long term, there will also be another feature to watch. As an upper level shortwave and subsequent low pressure system shift eastward north of the Great Lakes, a weak ridge will develop ahead of this in the northern Appalachian region and bring subsequent sfc high pressure. In turn, weak CAD will advect into the eastern portions of the area, which will likely set up a differential heating boundary by early to mid week and allow low chances of thunderstorms (30% or less) each afternoon. This will be dependent on where the sfc high officially sets up. Otherwise, mostly dry conditions are forecast with continued high temperatures in the low to mid 90s. Beyond the long term, the Climate Prediction Center keeps us in an area for likely above normal temperatures for the 8-14 day period. Therefore, relief from this heat is not currently in sight.

AVIATION

(18Z TAFS) Issued at 1148 AM CDT Sun Sep 6 2026

VFR conditions will be the predominant flight category at each terminal through the period. A few TSRA may develop mid/late afternoon, but coverage will be very limited and confidence was too low to mention in the TAF at this time. Clouds will diminish after sunset, with tranquil conditions forecast overnight.

HUN WATCHES/WARNINGS/ADVISORIES

AL...Heat Advisory until 8 PM CDT this evening for ALZ001>010-016.

TN...Heat Advisory until 8 PM CDT this evening for TNZ076-096-097.