Area Forecast Discussion
Issued by NWS Sterling, VA

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762 FXUS61 KLWX 010757 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 357 AM EDT Sat Jun 1 2024 .SYNOPSIS...
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High pressure will build across the area through the day today before beginning to slide offshore Sunday. Dry conditions and below normal temperatures will continue as a result into the start of the weekend. Temperatures start to warm with increasing shower and thunderstorm chances Sunday into the middle part of next week.
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&& .NEAR TERM /THROUGH TONIGHT/...
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High pressure will continue to be overhead this morning and throughout the day today with light northwest flow becoming more southerly by the end of the day. Afternoon highs are expected to reach the upper 70s to low 80s for most areas with mostly dry conditions. A few high cirrus clouds will continue to trickle through the area later today as a more moist airmass approaches the Mid-Atlantic over the next few days. Overnight lows will fall into the upper 50s to low 60s for most areas.
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&& .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/...
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By Sunday, high pressure will begin to move further offshore with a weak area of low pressure moving in from the Ohio Valley. A few showers will be possible along and west of the Blue Ridge early in the day, with better chances for an isolated thunderstorm and scattered showers further east later in the afternoon and evening before tapering off early Monday. Afternoon highs on Sunday will be in the upper 60s for the mountains and mid to upper 70s to low 80s further east across the lower elevations. Monday has trended drier as the closed upper low continues to pivot further away from the area later in the day. Still maintained slight chance to chance PoPs on Monday given the residual low-level moisture lingering around. Highs will continue to climb into the low 80s for the lower elevations with mid to upper 70s more common in the mountains. Overnight lows Monday night will drop down into the upper 50s to low 60s with mostly dry conditions.
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&& .LONG TERM /TUESDAY THROUGH FRIDAY/...
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Brief and weak ridging overhead on Tuesday likely yields dry conditions for most of the area. Scattered showers will be possible though, primarily along and west of the Blue Ridge. Heading into midweek and onwards, guidance diverges somewhat. While consistent on bringing a frontal system into the region Thu/Fri, they differ on minor disturbances ahead of the system. If there is available forcing on Wednesday from these disturbances, shower activity is possible, but the absence of these features (like in the 18z ECMWF) produce a drier solution Wednesday. Guidance has also been inconsistent on if the upper trough associated with the frontal system cuts off as it moves into the Great Lakes. Regardless, the end of next week appears wet.
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&& .AVIATION /07Z SATURDAY THROUGH WEDNESDAY/...
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VFR conditions are expected to persist through most of the day on Sunday. By early Sunday, some of the western terminals (KCHO/KMRB) may see a few isolated showers before the remaining terminals further east increase their chances for showers and isolated thunderstorms later in the day. Brief ceiling restrictions are possible during this time. VFR conditions continue Monday into Tuesday with light northerly winds on Monday turning more southeasterly by Tuesday. VFR conditions are mostly expected both Tuesday and Wednesday, but any afternoon and evening showers or thunderstorms could bring restrictions to the terminals.
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&& .MARINE...
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Sub-SCA winds are expected to persist through Monday as high pressure influences the waters and keeps the pressure gradient tamed for the time-being. Southerly flow kicks back in on Sunday along with increasing low-level moisture, setting off the potential for showers and a few thunderstorms over the waters. Cannot completely rule out a Special Marine Warning during this period but the probabilities remain low given the convective setup of this disturbance. Sub-SCA conditions are expected Tuesday and Wednesday. Showers and thunderstorms moving over the waters during the afternoon and evening hours could bring stronger gusts. Special Marine Warnings cannot be ruled out.
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&& .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && $$ SYNOPSIS...ADM/EST NEAR TERM...ADM SHORT TERM...ADM LONG TERM...CAS AVIATION...ADM/CAS MARINE...ADM/CAS