110 FXUS62 KCAE 270014 AFDCAEArea Forecast Discussion National Weather Service Columbia SC 814 PM EDT Fri Sep 26 2025
.SYNOPSIS... Scattered to widespread showers continue this evening and overnight as the cold front very slowly approaches. The rain chances persist into the weekend and early next week with lower temperatures. Heavy rainfall and strong winds are possible early next week as we monitor tropical development.
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.NEAR TERM /UNTIL 7 AM SATURDAY MORNING/... Key message(s):
- Slow moving trough and front will continue to bring rain chances overnight tonight and into Saturday morning.
Convection has generally began to wane this evening outside of a batch south of the I-95 corridor, but fairly widespread light to moderate rain continues to work through the FA. So far, a swath of 0.75-1.5" of rain has fallen generally along and just north of the I- 20 corridor where a couple spots toward 2-2.5" have been noted. There is also a swath of 0.50-1.5" in southern Sumter and northern Clarendon Counties where convection currently is. The upper trough continues to work into the area with a closed circulation seen in Water Vapor imagery in southern Tennessee. The associated surface cold front really slowed down today with it still just northwest of the FA. For the remainder of the evening and overnight, a tongue of PWAT`s between 1.8-2.0" along with forcing the from the upper trough and slow moving surface front should allow at least scattered rain showers to continue. In general, an additional 0.25-1.25" of rainfall could be possible into Saturday morning, with the highest likelihood along and south of the I-95 corridor where convection may continue for the next couple hours before transitioning to light to moderate rain.
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.SHORT TERM /7 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... Key message(s):
- Showers and thunderstorms expected Saturday afternoon
An upper level trough will swing into the Southeast into the short term and become negatively tilted. The forecast area will be under the upper jet streak allowing for synoptic scale lift over the region. PWAT values will be around 2 inches across the eastern FA with slightly drier air to the west. As a surface front slowly moves into the forecast area it will be the focus for convective development as the air mass destabilizes in the afternoon. Synoptic support and PWAT values 140 to 160 percent of normal favors widespread convection and the potential for localized flash flooding. The threat of heavy rain is greatest in the eastern half of SC where moisture is deepest. Although any training of convective cells in the forecast area could contribute to flash flooding in localized areas. Rain chances will likely diminish by Saturday night as the initial trough axis moves to our northeast along with the deeper moisture. This will lead to diminishing rain chances into Sunday morning.
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.LONG TERM /SUNDAY THROUGH FRIDAY/... Key message(s):
- Potential for heavy rain, strong winds next week
A low pressure system appears to be forming near eastern Cuba and the southeastern Bahamas. Gradual development of this system is expected, and it will likely become a tropical depression during the next day or so while it moves northwestward or northward across the central and northwestern Bahamas.
The weather for the forecast area in the long term will be largely dependent on the eventual track and intensity of this system. Without getting into the complexity of the forecast, the biggest concern is the potential for heavy rain and flash flooding across the forecast area from late this weekend into next week. Strong winds will also be possible but this threat is even more closely tied to the track of this system. At this point, people should continue to monitor the forecast over the weekend so that they remain up to date on the potential hazardous weather.
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.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/... Periods of showers expected overnight and into Saturday. MVFR/IFR conditions in stratus likely Saturday morning.
Guidance continues to show periods of rainfall through the overnight hours and into portions of Saturday. Even with the showers this evening, ceilings should remain vfr, with brief mvfr visibilities in any heavier showers possible. Later tonight ceilings will begin to lower, with ifr conditions still expected to develop towards 10z at all locations, lasting to around 14 as they improve to mvfr. Vfr finally expected by 18z. Winds will remain fairly light and variable overnight before turning more out of the southeast around 5 knots by Saturday afternoon.
EXTENDED AVIATION OUTLOOK...Deep moisture remains in place this weekend leading to likely rain chances and possible widespread restrictions.
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.CAE WATCHES/WARNINGS/ADVISORIES... SC...None. GA...None.
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NWS CAE Office Area Forecast Discussion