textproduct: Huntsville

KEY MESSAGES

Updated at 1047 PM CDT Thu Aug 27 2026

- Dangerous heat will return late this weekend into early next week with heat indices approaching or exceeding 100 degrees.

NEAR TERM

(Rest of tonight and Friday) Issued at 1047 PM CDT Thu Aug 27 2026

The main concern tonight will once again be the threat for dense fog, though we have not seen any on nighttime RGB satellite or in sfc observations yet. Clear skies, calm winds, and near 0 degree dewpoint depressions point to a good chance for at least patchy dense fog though a Dense Fog Advisory is certainly in the cards later tonight through tomorrow morning. Overnight lows will fall to the upper 60s/lower 70s.

High pressure will begin to sink south into the area on Friday which will help bring drier conditions into the area. Any early morning fog should burn off by 8-9am and will be followed by abundant sunshine and temps in the upper 80s/lower 90s. The good news is that at least for now, lower humidity will mitigate the chances for heat indices over the 100 degree mark.

SHORT TERM

(Friday night through Sunday) Issued at 1047 PM CDT Thu Aug 27 2026

Upper ridging will begin to build across the central and eastern U.S. this weekend, leading to a mostly dry but warming forecast. An axis of higher moisture should remain positioned to our southeast and will result in low chances (20% or less) for diurnal thunderstorms over SE portions of the TN Valley both Saturday and Sunday. The bigger threat will come from increasing heat through Sunday, with highs climbing into the lower 90s and heat indices approaching or reaching 100 degrees. This will become dangerous for those who are especially susceptible to the heat and those without proper cooling and hydration. Practice heat safety this weekend and never leave people or pets unattended in vehicles!

LONG TERM

(Sunday night through Thursday) Issued at 1047 PM CDT Thu Aug 27 2026

The long term period will be dominated by an upper level ridge forecast to reside over the southeast U.S., bringing sfc high pressure and subsequent dry/warm conditions to the Tennessee Valley. A warming trend will set up early next week with highs reaching comfortably into the 90s and heat indices in the 100-105 degree range. There is a low chance a Heat Advisory will need to be issued by mid next week for heat indices over 105 degrees in portions of northern Alabama. Otherwise, PoPs remain very low each day as mostly dry weather is forecast. Be sure to keep up to date with the latest forecast and practice heat safety next week such as seeking shade when outdoors and remaining hydrated.

AVIATION

(06Z TAFS) Issued at 1119 PM CDT Thu Aug 27 2026

Patchy to areas of BR/FG will develop over the next few hours. Visibility of 1/4-3/4SM is expected in some river valley locations before dissipating by ~14Z. VFR conditions will then persist the rest of the period.

CLIMATE

Issued at 605 PM CDT Thu Aug 27 2026

Moderate Risk for Much Above Normal Temperatures:

The Climate Prediction Center has included the entire Tennessee Valley in a Moderate Risk for Much Above Normal Temperatures for September 4th through 6th. Therefore, there is a 40-60% chance for temperatures above 95 degrees F and heat index values exceeding 105 degrees F during this period

More information on the CPC U.S. Hazards Outlook can be found at: https://www.cpc.ncep.noaa.gov/products/predictions/threats/threats.php

HUN WATCHES/WARNINGS/ADVISORIES

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