752 FXUS62 KCHS 250529 AFDCHS Area Forecast Discussion National Weather Service Charleston SC 1229 AM EST Mon Feb 25 2019 .SYNOPSIS... High pressure will build into the area tonight and prevail through Tuesday. Unsettled weather will then return beginning Tuesday night and continuing through late in the week. High pressure will return late in the weekend. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... As of 1225 AM: IR satellite indicated that high clouds have pushed over the Atlantic. Modest CAA and clear sky should result in low temperatures in the upper 30s inland to the mid to upper 40s along the coast. Previous Discussion: The only planned changes for the late evening update include lowering dewpoints slightly and to nudge lows Monday morning down 2-3 degrees based on the latest temperature guidance. Skies will become clear from west-east through the night as the back edge of the cirrus deck pushes offshore. Gusty west/northwest winds will persist for several more hours as the bulk of the strongest cold air advection and associated surface pressure rises are still working through the local forecast area. && .SHORT TERM /6 AM THIS MORNING THROUGH WEDNESDAY/... Monday through Tuesday: Zonal flow will prevail through the early part of the week aloft. High pressure will build in on Monday, and then become centered to the northeast of the forecast area on Tuesday. Clear skies and tranquil conditions are expected Monday with highs in the low to mid 60s in most locations. Some upper 60s are possible in parts of southeast Georgia. Expect good radiational cooling conditions Monday night with lows ranging from the upper 30s inland to the mid/upper 40s along the coast. Tuesday will bring increasing high clouds through the day. Highs are expected to be a few degrees warmer than Monday, with upper 60s to low 70s common. Tuesday night through Wednesday: Shortwave energy embedded within the zonal flow aloft will translate through the region. Isentropic ascent will increase through this period as well, and rain chances will rise. There is some model disagreement, with the GFS/EC on the drier side while the NAM is considerably wetter. Rain chances have been increased, but kept in the 30-40 percent range. Cloud cover will keep temperatures down a bit Wednesday, but still in the upper 60s for most areas. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... Moderate confidence this period. Wednesday night should be mainly dry but unsettled weather looks to return Thursday and continue through Saturday as a few disturbances affect the area ahead of a fairly strong cold front which should move through Saturday. A few thunderstorms are possible late in the week, with a low chance of a few stronger storms Saturday ahead of the cold front as strong wind fields move across the area along with some instability. Cooler and dry high pressure should then return late in the weekend. Above normal temperatures look to prevail until Sunday when it will likely be below normal. && .AVIATION /06Z MONDAY THROUGH FRIDAY/... VFR. Extended Aviation Outlook: Flight restrictions are possible as early as Tuesday night. && .MARINE... Tonight: Had to reissue the Small Craft Advisory for Charleston Harbor as lagging cold air advection and associated pressure rises have pushed winds in the exposed areas of the harbor back into advisory thresholds. No other changes were made for the late evening update. Monday through Friday: Overall, expect quiet conditions below Small Craft Advisory thresholds through the week. High pressure will prevail into the middle of the week. Late in the week a weak front and surface wave could move through the region, keeping wind directions variable. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...Small Craft Advisory until 1 AM EST early this morning for AMZ330. Small Craft Advisory until 6 AM EST early this morning for AMZ350-352-354-374. && $$ NEAR TERM...NED SHORT TERM... LONG TERM... AVIATION...NED MARINE...