700 FXUS62 KCHS 021939 AFDCHS Area Forecast Discussion National Weather Service Charleston SC 339 PM EDT Sun Jun 2 2019 .SYNOPSIS... A cold front will move through tonight and early Monday. High pressure will then build into the region from the north, before shifting offshore mid week. A weak inland surface trough will then prevail late week with an increasing potential for unsettled weather next weekend. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... A generally dry cold front will move into southeast SC/GA late tonight. Moisture and forcing look limited so we are not expecting much in the way of showers but some of the higher resolution models indicate a few showers will be possible. Lows should range from the mid to upper 60s inland to mid 70s at the coast. && .SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/... Surface high pressure will begin to build in from the north on Monday behind a departing cold front. Quiet weather conditions are expected as drier air advects into the area. Highs will range from the low 90s in the northern zones to mid/upper 90s along the Altamaha. Monday night will be seasonable, with lows in the 60s. The flow will become more onshore on Tuesday as the high gradually shifts into the Atlantic, allowing for an increase in low level moisture. Isolated showers and thunderstorms are possible during peak heating along the sea breeze, with highest chances across southeast Georgia. The bigger story will be the noticeably cooler temperatures. Highs are forecast to peak right around normal in the mid/upper 80s, with some low 90s in interior Georgia. Atlantic high pressure will persist on Wednesday. Precipitation coverage is a bit uncertain. During the daytime hours, the NAM and GFS are on the drier side with most activity inland of the forecast area, while the Euro paints a wetter picture. Given there is not much forcing for convection, have opted to keep rain chances in the 20-30% range. Highs are forecast to be a couple of degrees warmer than Tuesday. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... Upper ridging on tap Thursday and perhaps into Friday with diurnal convection remaining rather isolated for the most part many areas. Moisture will be deeper and if the northern flanks of the ridge do decay a bit earlier, we could see more in way of coverage of showers and tstms over inland areas adjacent to the CSRA and Midlands, especially on Friday. Some form of significant upper troughing will take shape over the eastern U.S. over the weekend and we expect our region will become more active with convection with periodic bouts of unsettled weather. Temps should continue to run above climo norms. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... VFR conditions will prevail at KCHS and KSAV through 18Z Monday. Gusty winds to near 20 kt expected at times this afternoon. Extended Aviation Outlook: Mainly VFR. Brief restrictions will be possible mid to late week in late night/early morning low clouds. && .MARINE... Tonight: Breezy south to southwest winds will shift westerly late as a cold front moves south toward the SC coast. Seas should average 2-3 feet, highest east. Monday through Friday: Wind directions will be a bit variable on Monday as a cold front lingers in the vicinity. High pressure will build in from the north Monday night, allowing onshore flow to develop. Speeds will be a solid 15 knots across the waters on Tuesday as the pressure gradient remains enhanced. A light to moderate southerly component should then prevail into late week as the high shifts into the Atlantic, with typical diurnal enhancement along the land/sea interface and the SC Intra-Coastal. && .FIRE WEATHER... A Fire Danger Statement remains in effect for the entire area until 8 PM tonight due to the elevated fire danger risk. While relative humidity values are forecast to drop to 25-30% Monday afternoon, winds are expected to be lower than on Sunday. Thus, have opted to hold off on a Fire Danger Statement at this time. && .TIDES/COASTAL FLOODING... Shallow coastal flooding will be possible with the evening high tide cycle through at least mid week, especially along the SC coast. && .EQUIPMENT... WFO Charleston SC will only conduct upper-air soundings at 12Z until further notice due to a shortage of helium. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...None. && $$ NEAR TERM...RJB SHORT TERM... LONG TERM... AVIATION...RJB MARINE...RJB FIRE WEATHER... TIDES/COASTAL FLOODING... EQUIPMENT...