(EXTRACTED FROM FXUS64 KEWX 031402 AAA) /12TAFs/ A weak line of SHRA will move east over KSAT/KSSF in the next few hours and have TEMPO SHRA at those sites 12Z-15Z. Otherwise, at the I-35 sites, LIFR/IFR persists much of the morning before rapidly mixing out to VFR around midday. LIFR/IFR redevelop late this evening into overnight. Southerly winds of less than 10 KTs prevail. At KDRT, VFR and east to southeast winds of 5 to 10 KTs prevail today through tonight. PREV DISCUSSION... /ISSUED 211 AM CST Fri Dec 3 2021/ SHORT TERM (Today through Saturday)... Areas of fog with patchy dense fog have developed along and east of US 281. Have maintained the Dense Fog Advisory through 9 AM when it mostly dissipates. Only patchy fog is expected elsewhere. An upper level shortwave trough currently over Far West Texas into the Big Bend moves over Central Texas today. Forcing by this trough of an unseasonably moist and weakly unstable airmass will generate showers and thunderstorms. However, capping lingers keeping coverage very isolated. Area radars confirms this by currently showing showers from the Edwards Plateau to along the Rio Grande. The unseasonably moist airmass remains as the trough moves east of our area. Expect another round of fog overnight into Saturday morning. A weak cold front stalls just north of the Hill Country and our Central Texas counties while a dryline briefly moves into Val Verde county Saturday afternoon. While the low level jet, front, and dryline could generate showers, they will be quite isolated. For now, will keep POPs out of the forecast for tonight into Saturday. A southerly lower level flow prevails keeping temperatures well above normal in the short-term. LONG TERM (Saturday Night through Thursday)... Semi-zonal flow aloft will be in place across much of the southern CONUS on Saturday evening, although a shortwave is forecast to impact portions of TX overnight. Models have generally backed off on the strength of this wave over the past couple of runs, though there's still a very low chance for isolated showers with a rumble of thunder or two across the Hill Country. Will continue to leave mention out of the forecast given model trends, particularly in the NAM. The overnight hours will otherwise feature continued warm, humid conditions with fog and stratus development similar to what we've been experiencing the past several nights. During the day Sunday, mostly cloudy skies are likely to prevail as model soundings depict a relatively thick high cloud layer embedded in moist SW flow off the Pacific. Nonetheless, highs will still reach the 70s to low 80s. A relatively strong trough will push into the north-central CONUS Sunday evening, with sfc cyclogenesis progged across the Great Lakes. A separate cutoff low is likely to remain well to our west near Baja California, although the latest ECMWF indicates a weaker trough, not closed off and located in closer proximity to south- central TX. This feature will be more important for our forecast on Tuesday. For Monday, expect a relatively strong cold front to push through quickly in the morning hours, with a few showers and potentially a thunderstorm possible prior to about noontime, mainly along and east of I-35 where deeper moisture will reside. A tenth of an inch of rainfall accumulation is probably about the best we can expect. Breezy north winds and cooler daytime highs mainly in the 60s appear likely behind the front. On Tuesday, the aforementioned closed low looks to open up and traverse TX ahead of a much deeper trough digging south along the west coast. Could see some showers and a thunderstorm or two during the day with this, but again we're not expecting a big rainmaker at this time and any rain at all is no guarantee. Temperatures may warm a few degrees compared to Monday, although temperature uncertainty increases significantly. We may well see highs remain in the 60s through Wednesday as another northerly wind shift returns for midweek as the next trough axis moves in. Most signs point towards better rain chances staying well off to our east with each of these systems. Another warm-up looks poised to begin next Thursday. With no rain forecast over our western areas that need it most, continued gradual expansion and degradation of drought status is likely.