Area Forecast Discussion
Issued by NWS Columbia, SC
Issued by NWS Columbia, SC
290 FXUS62 KCAE 210000 AFDCAE Area Forecast Discussion National Weather Service Columbia SC 700 PM EST Thu Nov 20 2025 .SYNOPSIS... Warm stretch continues through the end of the week. Near record high temperatures remain possible on Friday ahead of the next system. A few showers or thunderstorms are possible on Saturday with a cold front before high pressure and dry conditions return for the start of Thanksgiving week. Rain chances then move back in during the mid week Thanksgiving week. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Key message(s): - Areas of fog developing tonight, which may become dense. Lingering low clouds continue in the eastern portion of the forecast area with broad mid level ridging persisting over the Southeast. A shortwave is still expected to move along the northern portion of the ridge, with the showers associated with this disturbance moving into northern Georgia as of 630pm. The current trajectory of this activity looks to miss much of the area to the north but a few showers remain possible in Lancaster or Chesterfield counties. Rainfall not expected to amount to much as it is currently producing a few hundredths. Plentiful low level moisture in place as dew point depressions are already around 5 degrees this evening. With high pressure at the surface and a relatively weak low level jet, widespread fog is likely tonight. Another dense fog advisory will likely be needed early Friday morning. Lows tonight remain mild, mainly in the mid 50s. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/... Key message(s): - Near recored temperatures possible Friday and Saturday. - Isolated to scattered showers and a couple storms possible Saturday. Friday and Friday Night: The upper ridge holds over the area most of the day Friday before flattening out overnight and into Saturday in response to a series of shortwaves moving out of the Southern Plains. Strengthening southwesterly flow will continue to advect moisture into the area (PWAT`s near 1.25") and bring warm advection that will bring temperatures to near record values, in the upper 70s to low 80s. Dew points also look to be toward the low to mid 60s so it should feel unseasonably humid as well during the afternoon. Dry weather is expected to prevail through the day before isolated rain showers become possible overnight with surging PWAT`s over 1.50" and subtle height falls ahead of a shortwave. Saturday and Saturday Night: At the start of the day, a shortwave will be nearing the region along with a developing area of low pressure toward the Mid Atlantic along a diffuse frontal boundary. Persistent moisture advection should maintain isolated rain showers into the morning hours before the frontal boundary and core of the shortwave are expected to move through the area during the afternoon, clearing the FA overnight. The plume of enhanced moisture advection is expected to shift east through the day, leading to more isolated PoP`s during the afternoon where a couple storms can not be ruled out with minimal elevated instability noted in forecast soundings. This activity then likely wanes overnight as the front clears the region. In terms of temperatures, persistent strong southwesterly flow could bring another afternoon with near record temperatures. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Key message(s): - Temperatures briefly cool to near normal before rising back slightly above normal. - Rain chances move back in through the midweek. Slightly cooler and drier air is expected to push in along with brief shortwave ridging behind Saturday`s front for Sunday and into Monday. This pattern should keep temperatures closer to normal, but with dry conditions. The pattern likely amplifies Tuesday and into the midweek as seen in the EC Ensemble and GEFS mean solutions where deep troughing moves into the Central US, maintaining moist southwesterly flow aloft in the FA. A series of shortwaves should move through Tuesday and Wednesday, bringing at least isolated chances for rain each day with temperatures just above normal. There has been a consistent signal in global models that a stronger cold front could push through toward the late week, bringing back cooler/drier conditions. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... Another night of fog/stratus is possible tonight bringing IFR or lower restrictions. Late day stratus finally dissipated at all terminals except OGB which continues to carry an IFR cig to start the forecast. Strong signals in most guidance that stratus/fog forms and expands northwestward into the Midlands from the Coastal Plain, with possible stratus build down resulting in dense fog and IFR/LIFR vsbys. Confidence is highest at OGB with lower confidence elsewhere and therefore will carry prevailing LIFR vsbys after 08z at OGB while other terminals have LIFR restrictions in tempo groups from 08z-12z. Stratus may begin as early as 03z-05z but confidence is limited in timing though confidence is high in occurring. Winds should be relatively light to near calm through the night before picking up from the southwest around 5 to 10 knots after 15z. Restrictions should break and return to VFR with mixing between 15z-17z. EXTENDED AVIATION OUTLOOK...VFR conditions likely continue Friday afternoon. Increasing moisture Friday night into Saturday will lead to chances for rain and possible restrictions. && .CAE WATCHES/WARNINGS/ADVISORIES... SC...None. GA...None. && $$