textproduct: Huntsville

KEY MESSAGES

Updated at 929 PM CDT Fri Aug 14 2026

- Dangerous heat will impact the Tennessee Valley through the middle of next week, with Major (Level 3/4) to Extreme (Level 4/4) heat impacts forecast.

- A Heat Advisory is in effect for all of northern Alabama and southern middle Tennessee through 7 PM Monday, with extensions potentially into the middle of next week.

NEAR TERM

(Rest of tonight and Saturday) Issued at 929 PM CDT Fri Aug 14 2026

Tranquil weather across the Tennessee Valley this evening with high pressure in control of our sensible weather. Remnant cirrus from earlier convection to the south continue to dissipate and the end result will be a clear night. Despite this, it will be very warm and muggy, thanks to this moist, tropical air mass in place. As a result lows in the mid to upper 70s will be common, with little relief from the heat overnight. With the ridge in place, ample heating will occur during the day on Saturday, allowing highs to reach the mid to upper 90s. Combined with dewpoints in the mid 70s, this will create heat index values in the 105 to 110 degree range during the afternoon hours. NWS Heat Risk highlights a Major (Level 3/4) threat for heat impacts across the entire Tennessee Valley. A Heat Advisory remains in effect for the entire area through Monday.

SHORT TERM

(Saturday night through Monday) Issued at 929 PM CDT Fri Aug 14 2026

The high pressure ridge will amplify and move eastward over the Mid South and lower Mississippi Valley Sunday into Monday, with a heat dome underneath this ridge subsequently shifting east into the region. Daytime highs in the 95 to 100 degree range will be common both days. With dewpoints in the mid to upper 70s, heat index values reach the 105-110 degree range, with some locations peaking between 110-114 degrees. As a result, NWS Heat Risk highlights a Major (Level 3/4) threat to Extreme (Level 4/4) threat for heat impacts both days. A Heat Advisory is in effect until 7 PM Monday, but we will need to monitor forecast trends across portions of northwest and north central Alabama and southern middle Tennessee where an upgrade to an Extreme Heat Warning may be needed in later forecast updates.

LONG TERM

(Monday night through Friday) Issued at 929 PM CDT Fri Aug 14 2026

The center of the ridge will begin to gradually flatten through the week, but Major (Level 3/4) heat impacts will continue through the work week. This is due to highs in the mid 90s and dewpoints in the mid to upper 70s creating heat index values in excess of 105 degrees each day. In addition to the heat, low chances (20-30%) of diurnally driven showers and thunderstorms will return to the forecast each afternoon Tuesday through Friday, thanks to the deep moisture in place. The one caveat would be if the ridge shifts a little further to the west, placing the area under northwest flow aloft. Should this play out, we may be more under the threat for MCS activity that rides along the edge of the ridge. We'll have to watch this in the days to come. Overall, hot and humid weather for the foreseeable future.

AVIATION

(06Z TAFS) Issued at 1111 PM CDT Fri Aug 14 2026

VFR conditions will prevail at each terminal through the remainder of the period, with light winds and a mostly clear sky.

HUN WATCHES/WARNINGS/ADVISORIES

AL...Heat Advisory until 7 PM CDT Monday for ALZ001>010-016.

TN...Heat Advisory until 7 PM CDT Monday for TNZ076-096-097.