textproduct: Huntsville

KEY MESSAGES

Updated at 944 PM CDT Sat May 9 2026

- Low-medium chances for patchy, dense fog tonight

- A low chance for thunderstorms will exist Sunday afternoon and evening with a low chance of a few strong storms capable of producing gusty winds and small hail (highest confidence across NW AL)

NEAR TERM

(Rest of tonight through Sunday night) Issued at 944 PM CDT Sat May 9 2026

A mostly dry night is in store for the Tennessee Valley as sfc high pressure lingers through the southeastern U.S. However, a few CAMs hint at a pop up shower overnight so have left a very low chance (10% or less) in the forecast package. Calm winds and periods of clear skies will contribute to low-medium chances of patchy, dense fog overnight (with higher confidence north of the TN River). Visibilities in some areas may be reduced to 1/4 mile or less. Current thinking is that these areas of dense fog will be spatially limited and therefore holding off on a Dense Fog Advisory at this time. If observational data supports more widespread, dense fog then one may be considered in the overnight update. Low clouds will slowly push northward and linger through the morning hours. Any fog that does form should dissipate by the late morning.

The primary talking point for Sunday will be a low chance of thunderstorms with a low chance of some becoming strong during the late afternoon into the evening hours (with higher confidence in strong storms remaining in NW AL). An upper level trough and subsequent cold front are forecast to shift eastward into the lower MS and TN Valleys on Sunday. While we will likely remain dry though most of the day, low-medium chances (45% or less) of thunderstorms are forecast to push in by the evening hours. Instability looks meager with the exception of ~500 J/kg in NW AL during the late afternoon. Coinciding with steep low level lapse rates, gusty winds will be a hazard with a thunderstorm in the area should one be realized. Weak shear will prevent a higher severe threat throughout the area. Those with outdoor plans for the evening are urged to check back in for forecast updates as we progress into tomorrow!

SHORT TERM

(Monday through Tuesday) Issued at 944 PM CDT Sat May 9 2026

Post-frontal sfc high pressure will reign over the area early next week, allowing dry conditions both Monday and Tuesday. Highs are forecast to be relatively cooler, peaking in the mid 70s through most of the area both afternoons. Overnight lows are forecast to drop into the mid to upper 40s.

LONG TERM

(Tuesday night through Saturday) Issued at 944 PM CDT Sat May 9 2026

Tuesday night clear skies and light winds will help lows dip into the lower 50s. On Wednesday, high pressure will get shoved eastward as a trough moves across the Great Lakes. The cold front associated with the sfc low up there will trail through the OH Valley, into the Mid MS Valley and back into the Southern Plains. The front will move through Wednesday evening or night and it is trending to only provide a few showers. Afternoon highs should be able to reach around 80 degrees. We will be postfrontal on Thursday and high pressure will build in across the Great Lakes on down to the Lower MS Valley. This will provide highs in the mid/upper 70s under a sunny sky and lows around 50 degrees. The upper level ridge will glide through the Southeast on Friday, but be dampened by a shortwave running into it on Saturday. It will keep conditions dry during this time, but raise temperatures. Look for highs in the lower 80s on Friday and the mid to upper 80s on Saturday.

AVIATION

(00Z TAFS) Issued at 554 PM CDT Sat May 9 2026

VFR conditions are forecast to continue through the next few hours before fog begins to reduce visibilities to MVFR. By mid morning, low stratus will be the primary concern as ceilings drop to 800ft and IFR conditions will be likely. VFR conditions return by the late morning hours.

HUN WATCHES/WARNINGS/ADVISORIES

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