textproduct: Huntsville

KEY MESSAGES

Updated at 219 AM CDT Thu Jun 11 2026

- Patchy dense fog this morning will give way to a hot and humid day. Heat Risk is moderate today with heat index values of 95-105F.

- Low to medium chances for thunderstorms this afternoon and evening. A few could be strong with gusty winds and heavy downpours.

- Additional rounds of showers and thunderstorms are forecast Sunday and Monday with a risk of strong gusty outflow wind gusts and locally heavy rainfall and flooding.

NEAR TERM

(Today) Issued at 219 AM CDT Sat Jun 13 2026

Patchy dense fog has begun to develop, especially in some river valley locations. Visibility will drop to 1/4sm or less in these areas. This is beneath a surface ridge across the OH and TN Valleys this morning. The fog will dissipate rather quickly after sunrise with strong heating expected. Highs will easily reach the upper 80s to lower 90s this afternoon. With dew points in the lower to middle 70s, heat index values will peak in the 95-100F range for most areas, with a few areas reaching 100-105F, especially in northwest AL. The heating and high moisture content will result in afternoon SBCAPE values in the 2500-3000 J/kg range. Thus, there remains a low chance of a thunderstorms this afternoon. The storms will be capable to gusty winds, sudden lightning and locally heavy rain. Areal coverage should be isolated to scattered in nature.

SHORT TERM

(Saturday night through Monday) Issued at 1033 PM CDT Fri Jun 12 2026

Saturday night a fast-moving shortwave will shift from the central Plains into the mid Mississippi and Ohio Valley. A complex of storms will form ahead of a front to our northwest that will track toward the region overnight. If it can hold together, it may move into the region during the predawn hours on Sunday (09-12z), bringing strong winds gusts and heavy downpours for Sunday morning. With the boundary draped across the region on Sunday, additional rounds of showers and general thunderstorms will occur (70-80% chance), with heavy downpours and localized flooding again this biggest concern. Guidance within the last 24 hours has trended faster with the frontal passage and shows it dropping south of the region Sunday evening into Sunday night, with some low to medium (30-60%) for showers and a few storms continuing during this window. With the boundary just south of the region on Monday, our highest PoPs will be displaced over central and south Alabama -- with low to medium (20-40%) of some showers and storms in the afternoon once again. The main story for Monday will be the much cooler temperatures as highs will drop into the upper 70s to lower 80s.

LONG TERM

(Monday night through Friday) Issued at 1033 PM CDT Fri Jun 12 2026

The TN Valley will be on the northern side of a cold front as we head into the long term period, bringing a temporary but much welcomed break from the heat and humidity. In fact, temps will fall to the low to mid 60s Tuesday morning with highs in the upper 70s/low 80s in the afternoon. Upper troughing will shift east through the eastern CONUS, pushing high pressure and dry conditions into the area on Tuesday before a return to southerly flow brings low chances for mainly diurnal showers and storms Wednesday. Temps will be on the rise during the mid-week period as well with highs approaching the upper 80s to lower 90s Wednesday and Thursday. Higher rain chances (60-80%) toward late next week as another upper wave and associated cold front approaches the area.

The forecast for next week still remains of lower confidence given model discrepancies at this range, but the threat for flash flooding early next week appears lower than in previous days.

AVIATION

(12Z TAFS) Issued at 512 AM CDT Sat Jun 13 2026

Patchy dense FG in several river valleys will dissipate by ~14Z. This will affect KMSL and areas near KHSV with visibility of 1/4SM. VFR conditions will then prevail for the rest of period. The exception will be isolated to scattered TSRA this afternoon and evening. Also, very late in the period (after 06Z) entering far northwest AL and southern middle TN. Confidence remains too low to include at KMSL or KHSV, so check future updates later today.

HUN WATCHES/WARNINGS/ADVISORIES

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