742 FXUS62 KCHS 040503 AFDCHS Area Forecast Discussion National Weather Service Charleston SC 103 AM EDT Sun Apr 4 2021 .SYNOPSIS... High pressure will build across the region through the weekend and prevail through mid week. Warmer conditions will return early next week. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... Rest of tonight: Nudged up surface dewpoint temperatures a degree or two, which may make it harder for scattered frost to form. Temperature and wind forecasts seem to be in line with little/no change from previous forecast. Otherwise, surface high pressure will remain over the Southeast, allowing quiet and dry weather to continue. Clear skies and calm winds will lead to ideal radiational cooling. Lows are forecast to range from the mid to upper 30s across the far interior, to low/mid 40s at the immediate coast. Concerned that frost may struggle a bit more to form, unless the temperature crashes through the dewpoints, which are generally in the mid to upper 30s. Have maintained patchy to scattered frost well inland, where a Frost Advisory remains in place from 4 AM to 8 AM. && .SHORT TERM /6 AM THIS MORNING THROUGH TUESDAY/... There are no concerns. Mid-level heights will slowly increase as the dampened ridge axis to the west propagates to east through early next week. Surface high pressure will hold its influence into Tuesday. A weak lee-side trough will develop over the Carolina Piedmont Sunday, but will have little significant influence this far south. Highs will steadily warm each day coincident with rising low- level thicknesses and H8 temperatures. Highs will warm into the lower 70s Sunday, mid 70s Monday with upper 70/lower 80s Tuesday. Local sea breeze influences are likely each afternoon which will keep coastal areas a bit cooler. Lows will range from the lower 40s inland/mid 50s beaches Sunday night with upper 40s inland/upper 50s beaches Monday night. Dry weather will prevail. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... A fairly quiet weather pattern will persist as high pressure remains over the Southeast United States through the middle of next week. A noticeable warming trend is expected as mid/upper lvl ridging broadens just west of the area, then slides off the East Coast near the end of the week. A cold front approaches from the west near the end of the week, extending from deepening low pressure system over the Central Plains. This system will bring showers and thunderstorms to the area by Friday. && .AVIATION /06Z SUNDAY THROUGH THURSDAY/... VFR conditions will prevail at KCHS and KSAV through 00z Monday. Extended Aviation Outlook: VFR. && .MARINE... Rest of Tonight: No highlights. High pressure will remain over the region. A weak pressure gradient will keep winds 10 kt or less. Seas will average 2-4 feet, highest beyond 20 nm. Sunday through Thursday: There are no marine concerns through as high pressure will remain the dominant feature. West to southwest winds will prevail with speeds generally 10 kt or less. Local sea breeze enhancements are likely each afternoon near the coast and Charleston Harbor. Seas will average 1 to 3 ft through the period. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...Frost Advisory from 4 AM to 8 AM EDT this morning for GAZ087- 088-099-100-114-115. SC...Frost Advisory from 4 AM to 8 AM EDT this morning for SCZ040- 042>045. MARINE...None. && $$ NEAR TERM...BSH/RFM SHORT TERM... LONG TERM... AVIATION...BSH MARINE...ETM