textproduct: Huntsville

KEY MESSAGES

Updated at 330 AM CDT Sun Sep 13 2026

- NWS HeatRisk values will largely be in the Moderate category during the forecast period, although Major category is expected mainly for portions of NW Alabama and urban areas Monday through Wednesday.

NEAR TERM

(Rest of Today and Tonight) Issued at 920 AM CDT Sun Sep 13 2026

Dense fog was still prevalent across much of Madison, Jackson and DeKalb Counties. The fog and low cloud layer was lifting slowly, and should dissipate readily by 15-16Z and will let the Dense Fog Advisory expire. The rest of the day will be mostly sunny and become hot with highs in the lower to middle 90s, despite a delay to the sunshine in the foggy areas this morning. No precipitation is forecast today with subsidence increasing, but a few cumulus will develop during peak heating.

SHORT TERM

(Monday through Tuesday night) Issued at 920 AM CDT Sun Sep 13 2026

A deep layer anticyclone over the lower MS Valley will build with with time and shift into the TN Valley on Monday, and into the Smoky Mtn region on Tuesday. This will increase subsidence/sinking air aiding an increase in temperatures once again and keeping the forecast dry. Forecast highs will be in middle to upper 90s anticipated in valley areas. Daytime mixing will lower dew points into the upper 60s to around 70, but heat index values will still peak around 100 degrees or a few degrees higher at times during the peat heating hours. Heat Risk levels may reach a level 3 of 5 (Major) in northwest Alabama, and we may need to consider a Heat Advisory with WBGTs on Tuesday reaching the upper 80s.

LONG TERM

(Wednesday through Saturday) Issued at 859 PM CDT Sat Sep 12 2026

The start of the long term will offer much of the same as ridging remains anchored over the TN Valley and high pressure sets up along the eastern seaboard. With high pressure both at the surface and aloft, dry and hot conditions will prevail with highs soaring into the 90s each afternoon. ESE flow off the Atlantic will keep dew points in the high 60s to low 70s. This will push heat indices near and above triple digits with heat being the primary concern through the long term forecast. Make sure to continue to practice proper heat and sun safety.

By Friday, models begin to diverge as the ridging over the SE looks to retrograde. A weak front looks to approach from the NW however significant disagreement exits in the models regarded if and when this front could come through. As such, ensemble spread increases in Friday and significantly on Saturday regarding our high temperatures, nearly nearly a ten degree spread widely shown in the models. Should the front near by the end of the week, this would increase cloud cover and rain chances, and decrease temperatures. If the front stalls to our NE, hot and humid conditions will prevail through Saturday. Please check back for updates.

AVIATION

(18Z TAFS) Issued at 1107 AM CDT Sun Sep 13 2026

VFR conditions are forecast through 09Z, when patchy BR/FG will develop. Have included TEMPO period from 09-13Z for MVFR visibility of 3-5SM at both KMSL and KHSV. High pressure will keep wind light or calm through the period.

HUN WATCHES/WARNINGS/ADVISORIES

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