textproduct: Huntsville

KEY MESSAGES

Updated at 333 AM CDT Mon Aug 10 2026

- Fog expected to develop overnight into the early morning hours with some locations becoming locally dense.

- Daily low to medium chances of thunderstorms are expected through Wednesday. The primary hazards will be gusty winds, heavy downpours, and frequent lightning but there is potential for isolated severe downbursts and hail as well. These chances become low chances towards the end of the week.

- High heat index and HeatRisk values may necessitate heat products by midweek.

NEAR TERM

(Today) Issued at 333 AM CDT Mon Aug 10 2026

Cloud cover is slowly clearing west to east this morning. Combined with winds that are nearly calm and dew point depressions only 0-2 degrees, expecting fog formation this morning. Low confidence on just how much visibility could drop but some dense fog cannot be ruled out later this morning. Please drive slow and with your low-beam headlights on for your commute to school and work. Also, if you encounter any lingering flooding from yesterday, turn around, don't drown! Fog will improve with sunrise.

A subtropical ridge lingering over FL will expand westward into the eastern Gulf today. Disturbances riding up the ridge along with a weak trough axis hanging on for one more day could spark showers and thunderstorms this afternoon. Low to medium chances (30-50%) of storms that could produce lightning, heavy rainfall that could lead to localized flooding concerns (PWATS are just under 2") and gusty winds. Highest coverage of storms looks to be in our southeastern counties. In response, temps will also warm with highs reaching the lower 90s and heat index values up to 105 degrees. Not enough coverage to warrant a heat product at this time, but there's better chance of that later this week.

SHORT TERM

(Monday night through Wednesday) Issued at 1117 PM CDT Sun Aug 9 2026

The upper ridge only slightly strengthens over northern Alabama on Tuesday. Not much change in the forecast on Tuesday, so a low chance 20-40 percent of showers and thunderstorms will continue. Flash flooding will continue to remain possible with high PWATS remaining in place, but potential will not be as high as over the past weekend. Highs should be a tad warmer with a lower coverage of precipitation expected again, climbing into the upper 80s to lower 90s. Heat index values will get close to advisory level again, but values of 105 degrees are not expected to be widespread enough to warrant any products at this time.

The upper ridge continues to build further north into the area on Wednesday. This should raise high temperatures a bit higher into the 90 to 95 degree range west of the I-65 corridor. NBM gives up medium to high chances of showers and thunderstorms. This seems a bit high based on the average of most other model guidance, so this may need to be revised down in future forecast updates. Depending on the actual coverage flash flooding may remain a threat. A Heat Advisory may be needed by Wednesday for a good portion of northern Alabama.

LONG TERM

(Wednesday night through Sunday) Issued at 1117 PM CDT Sun Aug 9 2026

The ridge continues to build over the southeast Wednesday night into Friday. This should really lower shower/storm chances to between 10 and 30 percent in the afternoon. Highs will likely rise into the mid 90s at least by Friday (maybe Thursday). Based on forecast 925 mb temperatures, conditions could be hotter, maybe some upper 90s in a few locations. This will likely amplify a heat wave that will continue into the weekend. Highs in guidance look a bit low based on forecast 925 mb temperatures.

On Friday, most models build the center of the upper ridge over Arkansas and Mississippi. This further strengthens the upper ridge over the area. This should push highs into the 95 to 100 degree range. The heat wave will likely peak over the upcoming weekend. With some 925 mb temperatures forecast, we could climb over the century mark during that period. Extreme heat products may be needed over the weekend.

AVIATION

(12Z TAFS) Issued at 612 AM CDT Mon Aug 10 2026

Patchy dense FG will dissipate by 13-14Z. KMSL will be affected by this with mainly 3-5SM BR. VFR conditions will last most of the period after that, but isolated to scattered +TSRA will develop by 18Z and last until around 00-01Z which may produce temporary IFR conditions. Additional patchy FG is expected later tonight into early Tuesday morning as well.

HUN WATCHES/WARNINGS/ADVISORIES

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