textproduct: Huntsville

KEY MESSAGES

Updated at 813 PM CDT Tue Sep 1 2026

- A Heat Advisory has been issued 11 AM Wednesday through 8 PM Saturday due to Major to Extreme HeatRisk along with afternoon heat indices rising up to 105-109 degrees.

NEAR TERM

(Today) Issued at 228 AM CDT Wed Sep 2 2026

Early morning temperatures have fallen to the lower 70s under clear skies across the Tennessee Valley. Like the rest of this week, today will focus on dangerous heat as upper ridging remains centered over the TN Valley. The combination of air temperatures in the upper 90s and dewpoints in the low to mid 70s will bring afternoon heat indices to the 103-109 degree range. Because of this, a Heat Advisory will be in effect starting at 11AM today through Saturday. Large scale subsidence will keep cloud cover to a minimum, providing no relief from the heat. Please remember to practice heat safety even if only spending a short time outdoors by staying hydrated, wearing light colored clothing, and never leaving people or pets unattended in vehicles!

SHORT TERM

(Wednesday night through Friday) Issued at 813 PM CDT Tue Sep 1 2026

The aforementioned Heat Advisory will remain in effect through 8 PM Saturday as Major (Level 3/4) to Extreme (Level 4/4) heat impacts will continue late this week. This will include the overnight hours as limited recoveries will occur with lows only dropping to the mid to upper 70s. With the ridge of high pressure and heat dome directly over the area, daytime highs will climb into the 95 to 100 degree range in most locations each day. Combined with dewpoints in the 70s, this will continue to create heat index values between 105 to 109 degrees both days. Strong subsidence from the ridge will significantly limited cloud cover and any potential for convection (with PoPs around 5% or less both Thursday and Friday). If you have outdoor plans this week, be sure to remain hydrated and seek shade when outdoors to avoid heat illness.

LONG TERM

(Friday night through Tuesday) Issued at 813 PM CDT Tue Sep 1 2026

The upper level ridge over much of the central and southeastern US will persist into this weekend; however, it looks like an upper trough tries to dig south over the Northeast, potentially breaking down the ridge over the Appalachians, Ohio Valley, and Tennessee Valley somewhat during this time. This may be short-lived, since synoptic guidance suggests that the ridge will build back over the Southeast through early next week. At the surface, high pressure over the Appalachians may be overtaken by a backdoor cold front slated to move into the region from the northeast by Sunday. Some guidance hints that this feature may bring enough moisture and lift with it to produce at least a low chance of showers and storms this weekend, but these trends will be monitored. By early next week, surface high pressure builds back over the Appalachians as the upper ridge takes hold over the region once again.

Overall, the hot and humid conditions are expected to continue through the long term period. Expect highs in the mid to upper 90s through the weekend with not much relief at night as lows merely dip into the upper 60s to lower 70s. These temperatures, along with dew points in the lower to mid 70s, will result in heat indices in the 100-106 degree range along with WBGTs in the mid to upper 80s (some spots around 90 degrees) and Moderate to Major HeatRisk (levels 2 and 3 of 4) for most of north Alabama and southern middle Tennessee. By early next week, the aforementioned backdoor front may temper the heat and humidity slightly. Highs in the lower to mid 90s with dew points in the upper 60s to lower 70s are anticipated, keeping the HeatRisk in the Moderate Risk category, heat indices generally between 98-103 degrees, and WBGTs solidly in the 83-87 degree range. Ultimately, the current Heat Advisory runs through Saturday evening; however, we will be monitoring if a further extension into Sunday becomes necessary.

Remember to practice heat safety, especially if you work outside or have outdoor activities! Stay hydrated, take plenty of breaks in the shade, and never leave people or pets in vehicles!

AVIATION

(06Z TAFS) Issued at 1046 PM CDT Tue Sep 1 2026

VFR conditions will prevail through the period with light winds and a mostly clear sky.

HUN WATCHES/WARNINGS/ADVISORIES

AL...Heat Advisory from 11 AM this morning to 8 PM CDT Saturday for ALZ001>010-016.

TN...Heat Advisory from 11 AM this morning to 8 PM CDT Saturday for TNZ076-096-097.