textproduct: Huntsville

KEY MESSAGES

Updated at 1025 PM CST Mon Dec 8 2025

- Low to medium chances of freezing fog area-wide tonight into early Tuesday morning.

- Subfreezing temperatures tonight, then a gradual warming trend through midweek.

- Confidence is increasing in the potential of colder conditions early next week.

NEAR TERM

(Today) Issued at 410 AM CST Tue Dec 9 2025

Satellite data and surface observations indicate that a layer of low stratus clouds (which has been in place for the past couple of days) is gradually eroding from NE-to-SW, with temperatures currently ranging from the m-u 20s in the northeastern portion of the CWFA (where skies have cleared) to the mid 30s in the southwestern portion (where skies remain cloudy). Although the presence of the cloud deck has thus far inhibited development of freezing mist/fog, it would not be surprising to see some develop between 10-14Z (especially to the N/E of Huntsville).

Over the course of the day, a lengthy surface ridge extending from the northwest Gulf Coast into New England will shift southeastward. As the pressure gradient contracts between the ridge and a developing surface low dropping southeastward over the northern Plains, a modest increase in SSW flow will occur across our region. Although periods of scattered-broken high clouds can be expected as a weak mid-level wave shifts southeastward over the TN Valley, these should have only a minor impact on temperatures with afternoon highs still predicted to reach the 45-50F range (a few degrees cooler atop the Cumberland Plateau).

SHORT TERM

(Tuesday night through Thursday) Issued at 1025 PM CST Mon Dec 8 2025

A deeper southerly flow should be in place for the mid week, as high pressure remains to our east. The southerly flow and higher heights/thicknesses will result in milder conditions. Lows should cool into the 30s (lower 30s east to upper 30s west) with light SE winds. A storm system forming over SW Canada will head eastward along the border, reaching the Great Lakes region on Wednesday. A cold front trailing south of this cyclone is forecast to move across this area Wed afternoon. Given that most of the energy should remain closer to the main storm, no precipitation is expected across this area. But with a SW-W flow and more sun, high temperatures for the mid week should rise into the mid to upper 50s. Cooler air west of the front filtering in will make for colder conditions Wed night with lows falling to around 30. Not as mild Thursday with highs in the mid 40s to around 50.

LONG TERM

(Thursday night through Monday) Issued at 1025 PM CST Mon Dec 8 2025

Slightly cooler than seasonal temperatures are forecast Thursday night, with lows falling into the low/mid 30s. Closer to normal readings will return on Friday with highs into the mid/upper 50s under partly sunny skies. With cloud cover on the increase, lows Fri night should range in the 30s.

Yet another storm system moving in from the WNW will bring lower end chances of showers across mainly the western areas Saturday afternoon. Rain chances should spread eastward across the Valley Saturday night, then end from west to east over our eastern areas Sunday morning. This system will bring colder air from up north to across the eastern CONUS early next week. Lows Sat night should cool from the upper 20s our Tennessee counties to mid 30s south of the Tennessee River. A chilly airmass will be more noticed Sunday, with highs only in the upper 30s north to mid 40s south. The start of the next work week, Monday will be on the cold side, with highs during the day into the mid/upper 40s.

AVIATION

(12Z TAFS) Issued at 543 AM CST Tue Dec 9 2025

Although the stratus layer has gradually eroded from NE-to-SW since issuance of the previous aviation forecast, MVFR cigs will persist thru 15Z at MSL, with VFR conds at HSV. Beyond 15Z, sct- bkn mid and high-lvl clouds will spread across the region in WNW flow aloft, as sfc winds assume a SSW component and increase to 5-10 kts. Clouds layers aloft will continue to increase in both coverage and density this evening, and LLWS has been introduced beyond 4Z as models suggest that a WSW low-level jet will increase into the 45-55 knot range during this timeframe.

HUN WATCHES/WARNINGS/ADVISORIES

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