263 FXUS61 KLWX 020114 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 914 PM EDT Sun Jun 1 2025 .SYNOPSIS... High pressure will build into the area and remain in control through much of the upcoming week. Another area of low pressure may bring a front through the region towards the end of the week into the weekend. && .NEAR TERM /THROUGH MONDAY/... A ridge of high pressure will build into the region through tonight. Favorable conditions for radiational cooling are expected with low Tds, no clouds, and light to no wind. This will result in below average temperatures tonight. Low temperatures will drop into the lower to middle 40s tonight. Many locations in the mountains at higher elevations and in the Shenandoah Valley in lower valleys will drop into the 30s. A Frost Advisory has been issued for western Garrett County, western Grant County, western Pendleton County, and western Highland County from 1am overnight through 8am Monday morning. Frost can harm sensitive outdoor vegetation. Please protect any sensitive vegetation as this is on the later side of the last climo frost. && .SHORT TERM /MONDAY NIGHT THROUGH TUESDAY NIGHT/... High pressure will remain in control Monday through Tuesday night. Dry conditions throughout the period. Plenty of sunshine each day. Temperatures will be about 3 to 5 degrees warmer on Monday than this afternoon. Highs will reach the lower to middle 70s widespread with cooler temperatures in the mountains. Monday night`s low temperatures will be about 5 degrees milder than tonight`s lows and dropping into the upper 40s to lower 50s. While Tuesday remains dry due to high pressure, high temperatures will be about 7 degrees warmer on average across the region when compared to Monday`s highs. Afternoon highs will predominantly reach the lower to middle 80s. Tuesday night`s low temperatures will be milder than Monday night with lows in the middle 50s to lower 60s. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Upper level ridging will be squarely overhead by Wednesday as the surface high begins to slide off the coast. The warming trend will continue as highs reach the mid to upper 80s, with a few 90s possible. Dew points will also be on the rise into the upper 50s and 60s, making it feel a bit muggier. More locations may have a shot at reaching 90 on Thursday. For some locations yet to reach 90, this will be one of the later first occurrences in at least the past decade. Troughing to the northwest will slowly break down the ridge during the second half of the week. It`s still uncertain how quickly the forcing moves into the area, with the associated frontal zone likely to arrive Friday or Saturday. Any shower and thunderstorm chances will likely be limited to the northwestern parts of the forecast area Thursday, with higher chances areawide Friday and Saturday. Will have to keep an eye on this period for potential stronger thunderstorms as well. The cold front will likely be south of the area by Sunday, but how far south will affect the chances for additional showers. While temperatures will be lower behind the front, readings may remain a little above normal. && .AVIATION /01Z MONDAY THROUGH FRIDAY/... VFR conditions expected through Tuesday night with high pressure in control. Some high elevated smoke from Canadian wildfires may be present off and on throughout the period. Westerly winds this afternoon will diminish tonight and become northwest. Winds will become light and variable Monday into Monday night. On Tuesday, winds will become more southerly but remain light. VFR conditions and light south winds will prevail Wednesday through Thursday as high pressure slides to the east. A shower or thunderstorm could approach MRB later Thursday. There`s a little higher chance for thunderstorms Friday but still uncertainty with how much of the area is affected. && .MARINE... Winds will diminish tonight before becoming light and variable through Tuesday night as high pressure gains control. Southerly flow remains in place Wednesday through Friday with high pressure off the coast. Southerly channeling along the bay Wednesday night may approach advisory levels. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...Frost Advisory from 1 AM to 8 AM EDT Monday for MDZ509. VA...Frost Advisory from 1 AM to 8 AM EDT Monday for VAZ503. WV...Frost Advisory from 1 AM to 8 AM EDT Monday for WVZ501-505. MARINE...None. && $$ SYNOPSIS...KLW NEAR TERM...KLW/CJL/CPB SHORT TERM...KLW/CJL LONG TERM...ADS AVIATION...ADS/KLW/CPB MARINE...ADS/KLW/CPB