Area Forecast Discussion
Issued by NWS Jackson, KY
Issued by NWS Jackson, KY
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800 FXUS63 KJKL 192147 AFDJKL AREA FORECAST DISCUSSION National Weather Service Jackson KY 447 PM EST Wed Nov 19 2025 .KEY MESSAGES... - Low clouds linger and patchy drizzle lingers into the evening followed by areas of dense fog on ridges late this evening and overnight. - Active weather continues through the end of the work week, with a seasonably mild and moist airmass in place. && .SHORT TERM...(This evening through Thursday night) Issued at 425 PM EST WED NOV 19 2025 Late this afternoon, the axis of an upper level ridge extended from the Gulf to the mid MS Valley while an upper level shortwave extended from Canada south to the western Dakotas. Meanwhile an upper level low was centered over the southwest Conus. Further west, an upper level trough was nearing the west coast of the Conus and BC. At the surface, a frontal zone continues to gradually sag south of eastern KY with a north to south temperature gradient in place with mainly 40s to near 50 degree readings near and north of the Mtn Parkway and low to mid 60s nearer to the TN border. Low clouds and stratus build down/reduced visibilities were present, especially on ridges in the north while some drizzle was also falling from these low clouds generally near and north of JKL. This evening through tonight, the axis of the upper level ridge will shift east and across the Commonwealth though the ridge will be flattening and a trend of height falls is anticipated. As this occurs, the upper level low/trough in Canada to the Dakotas will progress east and near Hudson Bay south to Manitoba and the upper MS Valley region. The upper low in the southwest meanwhile should meander to AZ downstream of the upper trough nearing the west coast of the Conus. The upper low should weaken to an open wave that rotates toward the Southern Rockies and then into sections of the Plains downstream of the trough entering the west coast of the Conus the southern portion of which closes off to another upper low near the Southern CA coast. Weaker shortwaves in southwest to west flow from the Southern Plains should cross the Commonwealth Thursday into Thursday night. As the shortwave trough moves from the Southwest Conus toward the Plains, a sfc low should organize over the TX and OK panhandle region by late on Thursday and then track into KS. At the same time, a northern stream front should drop across the western and central Great Lakes and approach the OH Valley. The boundary currently dropping south of the area will return north as a warm front into the TN Valley and OH Valley late tonight and Thursday and then into central and eastern KY Thursday night. Drizzle may linger into the evening as the frontal zone drops south though another round of stratus build down and fog on the ridges, particularly in the north, is anticipated tonight. Some of this may be dense in the northern half of the area. Low clouds may tend to lift and mix out a bit during the day on Thursday, but high and mid level clouds will be moving in ahead of the next system. Thickening and lowering clouds should occur with isentropic lift over the warm front lifting toward the area late Thursday and into Thursday night. Chances of showers will increase with this from the west and southwest late Thursday. As moisture in the column deepens Thursday evening and night and forcing increases, widespread rain or showers and even some thunder with elevated instability is anticipated. Limited diurnal ranges are anticipated in the near term period. However, temperatures in the northern half of the area should be milder on Thursday as compared to the past two days. .LONG TERM...(Friday through Wednesday) Issued at 429 PM EST WED NOV 19 2025 The extended period starts with the continuation of an active pattern. Models and ensembles are in good agreement of a warm front working into the area from the southwest late Thursday evening. By Friday morning, the front will become stationary, with showers through the day. After sunset, an area of low pressure over the Ozarks will progress eastward, introducing a small chance of thunderstorms across the area. Saturday morning, A cold front in the Ohio Valley from a passing Canadian low will help move the stationary front over Kentucky out of the area. This will lead to showers and thunderstorms tapering off in coverage in in the afternoon-evening. This cold front will also clear out some of the skies over the area, however there remains some uncertainty on the timing and how far south the clearing occurs which has lead to a good spread in plausible low temperatures. Sunday, weak ridging tries to build into the region however the next system is on the horizon. An upper level low is modeled to come out of the Southwest U.S. heading into Monday. Cloud cover may initially be thin enough where a ridge valley split could occur however clouds will increase after midnight as the system approaches. Overnight temperatures have been adjusted to where the low occurs slightly after midnight rather than just before sunrise. Lows Sunday night will generally be in the upper 30s in hollows and sheltered valleys, and lower 40s along ridge tops. Model and ensemble spread starts to rear their heads heading into Monday and beyond. Most guidance does keep the area dry for the most part, however there are some (not in the majority) models that area more progressive with the approaching system. This has lead to PoP chances of 15-24% being held through the forecast, introducing an isolated chance of showers. Tuesday, most of the guidance shows a cold front moving trough the area producing showers. Showers are then expected to taper off heading through Wednesday morning as the system departs the area. Temperatures generally remain in the low to mid 60s through Tuesday. Friday will be the warmest day, in the upper 60s to low 70s. Wednesday, temperatures return closer to normal in the upper 50s. As for low temperatures, Friday lows will likely be in the 50s, with other nights generally somewhere in the 40s. Colder air looks to move in to end the week. && .AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon) ISSUED AT 115 PM EST WED NOV 19 2025 Extensive low clouds and fog on ridges remain across northern sections of the area including KJKL, KSJS, and KSYM, while some breaks or at least in the way fog was in place near KSME and KLOZ and point south. Northern locations are at or below airport mins while from near KLOZ and KSME south IFR and MVFR was observed. Through the afternoon, some minor improvements are generally forecast and a category improvement may occur. However, by 00Z and after, the boundary that has been lingering over the region will have sunk south and low clouds and stratus build down may occur once gain and IFR ceilings and or vis should return near or north of a KSME to KLOZ line including KSYM, KJKL, and KSJS. as the night progresses. During the last 6 hours of the period, gradual improvements to MVFR or VFR are anticipated. Winds will remain light through the period at all terminals. && .JKL WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...JP LONG TERM...GINNICK AVIATION...JP