textproduct: Huntsville

KEY MESSAGES

Updated at 147 PM CDT Wed Sep 9 2026

- As a moist airmass returns to the region, chances for showers and thunderstorms will increase on Friday, and remain in the 20-50% chance range each day through Tuesday. Lightning and heavy rainfall will be the main impacts from the storms.

- NWS Heat Risk will remain in the Minor to Moderate category throughout the forecast period.

NEAR TERM

(Tonight) Issued at 147 PM CDT Wed Sep 9 2026

Tranquil weather across the Tennessee Valley with high pressure in control of our sensible weather. A glance at model soundings shows a very dry profile, indicative of strong subsidence from the ridge influence overhead. Thus, think it will be extremely tough to get much diurnally driven convection this afternoon. Having said that, a couple locations along the Plateau in southern middle Tennessee and northern Alabama may see a storm or two thanks to some orographic lift if the Cu field is any indication and will add a 5-10% PoP to highlight this. Any cloud cover that does develop will dissipate after sunset, resulting in clear/calm conditions tonight with lows in the upper 60s to lower 70s.

SHORT TERM

(Thursday through Friday night) Issued at 811 AM CDT Wed Sep 9 2026

Would anticipate Thursday to be very similar today and primarily devoid of any afternoon/evening convection. With ample sunshine and limited cloud cover, highs may actually run a degree or two higher, peaking in the mid 90s across much of the Tennessee Valley (with Moderate (Level 2/4) heat impacts forecast once again). Thursday night, a shortwave moving through the Great Lakes will finally force the aforementioned front south toward the Tennessee Valley on Friday. This feature will serve as a focus for afternoon/evening showers and thunderstorms (30-50% chance). A storm or two may become locally strong with gusty winds and heavy downpours the main threat. Ample heating during the morning will likely warm highs into the low to mid 90s again by the afternoon.

LONG TERM

(Saturday through Tuesday) Issued at 1052 PM CDT Tue Sep 8 2026

Global model guidance suggests that light south-southeasterly flow will persist across the TN Valley for much of the extended period, perhaps becoming a bit more pronounced on Sunday and Monday as a low develops across the central High Plains and progresses northeastward into the Great Lakes. This will sustain a very moist airmass (featuring PWAT values in the 2-2.2" range and dewpoints in the u60s-l70s, perhaps rising into the m70s by Monday and Tuesday). Although showers and thunderstorms could occur at any point (day or night), storm coverage during any single specific period remains uncertain due to indications that the Atlantic subtropical ridge will retrograde westward into the southeastern CONUS with time. Weak shear suggests that storms will be unorganized and initiated by low-level warm advection and mesoscale boundary interactions. Regardless, sufficiently high CAPE will exist for frequent lightning and high PWAT values/slow cell motions will support a risk for excessive rainfall and flash flooding. Highs are generally predicted to be in the l-m 90s (but may be lower on days with more extensive clouds and precipitation), with lows in the u60s-l70s. Heat risk will remain in the Minor-Moderate category through the period.

AVIATION

(18Z TAFS) Issued at 1144 AM CDT Wed Sep 9 2026

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

HUN WATCHES/WARNINGS/ADVISORIES

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