textproduct: Huntsville

KEY MESSAGES

Updated at 1052 PM CST Tue Dec 9 2025

- Confidence is increasing in the potential of cold conditions early next week (~25% probabilities for low temps in the teens Monday morning).

- Low chances of Precipitation return to the forecast Saturday night as a cold front pushes through the area.

NEAR TERM

(Today) Issued at 426 AM CST Wed Dec 10 2025

West-northwest flow aloft of 45-55 knots will gradually back to the west by sunrise and increase rather substantially into the 90-100 knot range by late this afternoon. This will occur as a shortwave trough digs southeastward from the northern Plains into the southern Appalachians in the broader circulation around a cold core vortex dropping southward across eastern Ontario. In the low-levels, the local pressure gradient is already in the process of contracting between a high situated along the southeastern Atlantic Coast as a surface low tracking into the Lower Great Lakes. Due to the combination of strengthening SSW flow and an abundant coverage of high clouds, development of mist/fog appears unlikely this morning. However, a notable gradient in temperatures currently exists across the CWFA, with u20s in the wind-sheltered valleys of Dekalb County and l40s across northwest AL.

Shortly after 12Z, surface winds will veer to WSW and strengthen further, with frequent gusts of 25-35 MPH expected until the pressure gradient begins to relax late this afternoon (as a cold front enters the region). Although solutions from several of the 0Z CAMs suggest that increasing deep-layer ascent related to the approaching mid-level trough may support a narrow band of low- topped showers along the front, boundary layer moistening may not be sufficient as dewpoints may only have time to recover into the lower 40s. However, we have made a minor increase in POPs (into the 10-20% range) between 18-0Z to reflect this scenario. Highs will range from the u40s-l50s in elevated terrain to the m-u 50s in the valley.

SHORT TERM

(Wednesday night through Friday) Issued at 1052 PM CST Tue Dec 9 2025

In wake of the front a brief cool down will take place Wednesday night as lows will drop back into the 20s and highs on Thursday will only peak in the upper 40s to lower 50s despite the ample sunshine. This will change on Friday as a ridge axis builds across the Deep South and Tennessee Valley. Plenty of sunshine and southerly winds will help to boost highs into the upper 50s to lower 60s on Friday.

LONG TERM

(Friday night through Tuesday) Issued at 1052 PM CST Tue Dec 9 2025

High pressure at the surface will promote fairly tranquil conditions Friday night into Saturday, with zonal flow continuing aloft. This will result in another fairly mild day on Saturday with high temperatures reaching the mid to upper 50s once again. A weak shortwave will bring another cold front through the area. Modest moisture return ahead of this feature should allow for some low chances (20-30%) for light precipitation Saturday night, before rapidly tapering off between 09-12z Sunday morning. Depending on the timing there could be a brief window for precipitation to mix with snow (with no impacts), but for a vast majority of locations think this will remain a cold rain -- with precipitation ending by the time the subfreezing air arrives.

A much colder air mass will arrive on Sunday, with highs struggling to climb much above the 40 degree mark. Then, a clear, cold, dry night will knock lows into the upper Teens to lower 20s Sunday night. This colder air mass will quickly begin to modify monday and Tuesday as high pressure builds in and winds veer back to a southerly direction. This will allow highs to climb back to seasonable norms.

AVIATION

(12Z TAFS) Issued at 548 AM CST Wed Dec 10 2025

There have been no changes to previous aviation forecast reasoning, as bkn-ovc Cs will continue to spread across the region early in the period. As SSW winds of 5-10 kts veer to WSW and increase to 14G26 kts by 15Z, the risk for LLWS will diminish, but wind speeds will remain in this range for most of the day before shifting to NW and subsiding late in the aftn as a cold front crosses the region. A few showers may occur in the vicinity of the frontal wind shift, but anticipated coverage is too low to include in the TAFs attm. After a brief period of clearing, broken high clouds will return this evening, but present indications are that lingering postfrontal stratus will remain displaced to the N/E of the terminals.

HUN WATCHES/WARNINGS/ADVISORIES

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