Marine Weather and Tide Forecast for Guntersville, AL

NEAR TERM
(Tonight)
Issued at 140 PM CDT Fri May 15 2026

A sunny sky and southerly flow is helping to push temperatures into the middle to upper 70s this afternoon, with highs reaching in the lower 80s before the day is out. A few mid and high clouds will develop later this afternoon and evening, mainly over TN and northwest AL as advection of Theta-E increases in mid levels.
Warm and moist advection in low levels will keep overnight lows in the upper 50s to lower 60s in southern TN and northwest AL.
Cool pockets in northeast AL due to boundary layer decoupling will dip into the lower to middle 50s.

SHORT TERM
(Saturday through Sunday)
Issued at 828 AM CDT Fri May 15 2026

Temperatures warm into the 80s on Saturday with tolerable humidity values. A weak shortwave will penetrate the ridge axis by Saturday night. This system may spark off showers and a few thunderstorms in GA on Sunday, which could clip east central and southeast AL as well. Will continue to monitor trends to see if this activity could affect northeast AL. Otherwise, highs on Sunday warm into the middle 80s to around 90. At least dew points will remain in the upper 50s to lower 60s keeping apparent temperatures in the same range.

LONG TERM
(Sunday night through Thursday)
Issued at 1040 PM CDT Thu May 14 2026

An upper-level ridge of high pressure will shift east of the area early next week, with deep southerly flow increasing across the Tennessee Valley. This will increase/reinforce a very warm, moist air mass across the region as evidenced by high temperatures climbing into the upper 80s to lower 90s and dewpoints reaching the mid to upper 60s. The ridge will begin to break down Monday night into Tuesday as a deepening upper trough over the Rockies swings onto the Great Plains. This will send a couple of shortwaves through the Mid South and Ohio/Tennessee Valleys on Tuesday, Wednesday, and Thursday. As a result, low to medium (20-40%) chances for showers and a few thunderstorms will return to the forecast Tuesday afternoon and evening. A sharper trough may send a weak front through the area on Wednesday and Thursday, bringing medium (40-60%) chances of showers and thunderstorms during the afternoon and evening hours, before finally shifting east of the area late Thursday night.

AVIATION
(00Z TAFS)
Issued at 545 PM CDT Fri May 15 2026

VFR conditions will prevail through the period, with upper level clouds forecast to increase late tonight into early Saturday morning. Light southerly winds tonight will increase to between 5-10 knots through late Saturday morning.

HUN WATCHES/WARNINGS/ADVISORIES
AL...None.
TN...None.