textproduct: Huntsville

KEY MESSAGES

Updated at 926 PM CDT Wed Jun 24 2026

- Major (Level 3 of 4) to Extreme (Level 4 of 4) Heat Risk develops Sunday into Monday and continues through the middle of next week with Heat Index values of around 100 to 109 degrees each day.

NEAR TERM

(Rest of tonight and Thursday) Issued at 926 PM CDT Wed Jun 24 2026

Tranquil weather across the Tennessee Valley this evening with high pressure at the surface in control of our sensible weather. Other than a few bands of mid to high level clouds overnight, mostly clear conditions will prevail, allowing low temperatures to fall into the low to mid 60s in most locations by early Wednesday morning. With dewpoints in the 50s and dewpoint depressions roughly 5-8 degrees, think that it will be a lot tougher to get fog tonight than in previous nights. Localized patchy fog may still develop in a few sheltered valleys, but it will not be widespread and will dissipate quickly after sunrise.

A remnant MCV over the Ozarks will drift into the Mid South overnight and eventually the Tennessee Valley during the day on Wednesday. This feature will likely be enough to kick off some low chances (20-30%) for a few showers and thunderstorms during the afternoon hours. However, most area will remain dry. Ample sunshine/heating will push highs into the upper 80s to around 90 degrees.

SHORT TERM

(Thursday night through Saturday) Issued at 926 PM CDT Wed Jun 24 2026

We will largely remain in zonal flow aloft on Friday, with a subtropical ridge noted across Texas building eastward across the Deep South. A couple of storm complexes may traverse the northern fringe of the ridge Friday and again Saturday (Mid-Mississippi, Ohio Valley, and central Appalachians). However, other than some cloud cover (and potentially some low precipitation chances in our far northern zones), the Tennessee Valley should remain devoid of showers/storms. The main concern will be the building heat that will begin to take shape late this week. Ample sunshine, light southerly winds, and a moist boundary layer will result in high temperatures reaching the lower 90s both days (with peak heat index values around 100 degrees). Those with outdoor plans should observe common sense heat safety practices.

LONG TERM

(Saturday night through Wednesday) Issued at 926 PM CDT Wed Jun 24 2026

The aforementioned ridge of high pressure will amplify and build north and east across the Tennessee and Ohio Valleys early next week. A very warm, humid air mass will spread eastward across the area underneath this ridge. This will create major to extreme heat impacts during this timeframe across much of the Deep South, including the entire Tennessee Valley region.

Each day (Sunday through Wednesday) will be characterized by mostly sunny to partly cloudy conditions, with high temperatures warming into the mid to upper 90s (with a few spots potentially reaching the 100 degree mark Tuesday/Wednesday). These hot temperatures, combined with dewpoints in the low to mid 70s, will create heat index values between 100-109 degrees each day. Heat Advisory products will likely be needed early next week, especially factoring the very limited recoveries overnight (lows in the mid to perhaps upper 70s).

NWS Heat Risk values highlight a vast majority of the region in Major Risk for Sunday and Monday. By Tuesday and Wednesday, NWS Heat Risk highlights an Extreme Risk across the entire region. These Major to Extreme Heat Risks, mean that this heat will affect everyone, especially those sensitive to heat and without adequate cooling/hydration. Health systems, industries, and infrastructure may also be impacted, especially by Tuesday and Wednesday as the heatwave builds with no relief occurring overnight.

If you have plans this weekend through much of next week, it is absolutely essential to practice heat safety such as staying hydrated and moving/remaining indoors in air conditioning during the peak heating of the day.

AVIATION

(00Z TAFS) Issued at 621 PM CDT Wed Jun 24 2026

VFR conditions will prevail through the period, with a mostly clear to partly cloudy sky and light southerly winds.

CLIMATE

Issued at 926 PM CDT Wed Jun 24 2026

Moderate Risk for Much Above Normal Temperatures:

The Climate Prediction Center has included the Tennessee Valley in a Moderate Risk for Much Above Normal Temperatures for July 2-4. Therefore, there is a 40-60% chance for temperatures above above the mid 90s and Heat Index values above 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.