textproduct: Huntsville

KEY MESSAGES

Updated at 232 AM CDT Wed May 27 2026

- Medium to high chances for showers and thunderstorms continue across the Tennessee Valley into the weekend.

NEAR TERM

(Today) Issued at 232 AM CDT Wed May 27 2026

An upper level convergence axis has shifted eastward tonight, taking with it a large cloud shield. Behind it, low level clouds have developed and lifted northward into the TN Valley. Sfc obs show that the low level stratus has not reduced any visibilities so far, but would not rule that out as we head towards sunrise so use caution when driving.

We remain in the stagnant pattern that has brought us numerous rounds of showers and thunderstorms, and it will do so yet again today. Coverage will be the highest this afternoon, ranging from low chances (30%) in NW AL to medium (60%) in NE AL. With the abundance of moisture still in place, we will have heavy rainfall that can create a reduction in visibilities and localized flooding in locations that have seen the greatest rainfall over the past week. Otherwise, daytime highs will reach the low to mid 80s with light S/SW winds.

SHORT TERM

(Wednesday night through Friday) Issued at 1036 PM CDT Tue May 26 2026

The overall synoptic pattern will change slowly through the remainder of the work week, with high pressure expanding southward over the northeast while the aforementioned upper wave slowly pushes east into the lower MS River Valley. Southwesterly flow ahead of this disturbance will keep the TN Valley in a warm tropical airmass and medium to high chances for diurnal showers and thunderstorms will persist through Friday. Flooding will remain a concern with any areas that receive multiple days of heavy rainfall, but a larger threat for flash flooding does not seem likely at this time. The threat for severe weather will remain very low, but modest afternoon instability could lead to a few stronger updrafts capable of producing gusty winds up to 40mph and frequent lightning. Highs will generally top out in the low to mid 80s each afternoon with lows in the upper 60s.

LONG TERM

(Friday night through Tuesday) Issued at 1036 PM CDT Tue May 26 2026

Ridging in the northern midwest will maintain a blocking pattern through the long term period. The placement of the ridge will allow several shortwaves to ride along its western periphery and drop SE into the TN Valley. At the surface, corresponding high pressure in the northern midwest will induce easterly flow along its base. This will maintain a muggy airmass as 60-70 degree dewpoints and elevated PWATS are pulled in from the Atlantic coast. All in all, the muggy airmass paired with several passing shortwaves will amount to additional days of medium to high rain chances of about 50-80% each afternoon. While thunder is likely with any showers, there are no strong signals for severe weather currently during this period. Rather, we will continue to monitor flooding potential. With high rain chances in place all week, additional rain in the long term may lead to compounding flooding concerns with any additional heavy rainfall increasing the chances of flash flooding and river flooding.

AVIATION

(12Z TAFS) Issued at 621 AM CDT Wed May 27 2026

A low cloud deck that developed overnight is keeping MVFR CIGS in place through shortly after sunrise. VFR conditions will return thereafter, but passing showers or thunderstorms through the afternoon will bring brief MVFR conditions. Forecast trends look like a low stratus deck will develop once again tonight so included MVFR CIGS after midnight til the end of the TAF period.

HUN WATCHES/WARNINGS/ADVISORIES

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