textproduct: Huntsville

KEY MESSAGES

Updated at 800 AM CDT Sat Sep 26 2026

- A warming trend will take place this week with increasing humidity yielding a Moderate Heat Risk (Level 2/4) in some areas Wednesday through Saturday. - Low to medium chances of thunderstorms will return to the forecast late this week into the weekend.

NEAR TERM

(Rest of Today and Tonight) Issued at 800 AM CDT Sun Sep 27 2026

Finally some autumn-like weather across the Tennessee Valley, with light northerly flow reinforcing a relatively "cool" and drier air mass. We begin the day in the low to mid 50s in most locations, with some mid to high clouds passing overhead. Current radar suggests some light virga is occurring, especially over northwest Alabama (supported by very weak towers on visible satellite in northeast Mississippi). However, model soundings continue to show an extremely dry layer of air below 700 mb. Thus, any light precipitation (save for a sprinkle or two) should evaporate before reaching the ground and will keep PoPs at 5% or less for this reason. These clouds should gradually thin by the afternoon, resulting in mostly to partly sunny conditions for the remainder of the day. Highs will again reach the low to mid 80s, and it will feel quite comfortable given the lower RH values. For tonight, the mostly clear and calm conditions (and dry air mass) will again support good radiational cooling, with lows dropping into the low to mid 50s once again.

SHORT TERM

(Monday through Tuesday) Issued at 800 AM CDT Sun Sep 27 2026

A carbon copy of the forecast is anticipated for both Monday and Tuesday as the Tennessee Valley remains wedged between a slow- moving low pressure system off the Atlantic Coast and a building upper ridge axis over Texas into the lower Mississippi Valley. With light northerly flow continuing on Monday, low to mid 80s highs will be common again, with lows again dropping to the lower 50s at night. For Tuesday the low in the Northeast begins to finally pivot east, allowing the ridge to become more established over the Deep South. In response, winds weaken slightly and also veer to the ESE/SE. Strong subsidence from the ridge and the light southerly flow may help to make Tuesday a few degrees warmer, with mid 80s being more common (and potentially a few upper 80s).

LONG TERM

(Tuesday night through Saturday) Issued at 741 PM CDT Sat Sep 26 2026

We will begin to transition patterns in the long term period as upper ridging expands over the Plains and eventually into the Southeastern region. This will bring warming temperatures and an increase in humidity toward the mid-late week timeframe. In fact, highs on Wednesday will reach into the upper 80s to lower 90s with dewpoints climbing into the 60s. Thankfully we will be spared from a more intense heat wave this time with temps in the lower 90s and dewpoints near or below 70 degrees. With that said, afternoon heat indices will still reach the low to mid 90s during the Wed-Fri timeframe and could pose a risk for heat related illness for those especially sensitive to heat.

The forecast, especially as we head into the weekend, becomes a lot less uncertain as we will remain in a warm, tropical airmass ahead of an approaching upper wave. There are still fairly significant spatial and temporal differences amongst longer range models regarding the speed of an incoming cold front that is progged to impact the TN Valley next weekend. With this in mind, we will stick with blended guidance and message increasing chances (30-65%) for showers and thunderstorms next weekend. Be sure to check back for updates throughout the week especially if preparing for outdoor plans!

AVIATION

(12Z TAFS) Issued at 542 AM CDT Sun Sep 27 2026

VFR flight conditions continue with light northerly winds.

HUN WATCHES/WARNINGS/ADVISORIES

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