Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 200700 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 300 AM EDT Sun May 20 2018 .SYNOPSIS...
-- Changed Discussion --
Scattered showers should end this morning as a cold front exits, with mainly dry weather expected the rest of the day under building high pressure. Rain chances return early in the week with crossing low pressure.
-- End Changed Discussion --
&& .NEAR TERM /UNTIL 6 PM THIS EVENING/...
-- Changed Discussion --
Isolated to scattered showers should taper off early this morning after the passage of a cold front. Areas near MGW to ZZV and S are expected to be in close proximity to the front as it stalls this afternoon. Maintained just a slight chance of showers/tstms for that area. Otherwise, building sfc high pressure should return dry weather by the afternoon as temperatures remain above seasonal levels.
-- End Changed Discussion --
&& .SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY NIGHT/...
-- Changed Discussion --
Sfc high pressure across Ontario and the Ern Great Lakes should maintain dry weather through most of tonight. Low pressure is expected to track across the Midwest late tonight through Monday, dragging the stalled sfc front back N as a warm front. Models trended slower with this scenario with a stronger sfc high to the N, so slowed the return of the shower/tstm POPs in the forecast. The sfc low is expected to track across the Upper OH Valley and Eastern Great Lakes region Tuesday, as the low`s associated cold front approaches and crosses the area. Maintained likely POPs for showers/tstms as this occurs. The potential for stronger storms will be dependent on how much destabilization and sfc heating takes place. The front should complete its passage Tuesday night with decreasing POPs. Above seasonal average temperatures are expected to continue.
-- End Changed Discussion --
&& .LONG TERM /WEDNESDAY THROUGH SATURDAY/...
-- Changed Discussion --
Ridging should return dry weather to the forecast through the end of the work week as a trough slowly advances ewd from the Wrn CONUS. The trough is expected to approach the Upper OH Valley region by the weekend, with shower and tstm chances returning. Temperatures are expected to average above seasonal levels.
-- End Changed Discussion --
&& .AVIATION /07Z SUNDAY THROUGH THURSDAY/... Scattered showers will remain possible ahead of a cold frontal passage overnight. Low clouds will increase overnight, with ceilings dropping to MVFR/IFR areawide given the abundant low- level moisture. Some MVFR mist is also possible, but fog is not expected to be a widespread issue given continued mixing in the boundary layer. High pressure will provide mostly dry weather behind the front into Sunday evening, with a return to VFR conditions by early afternoon. Southwest winds will shift to northwest behind the front, with speeds near or below 10 knots through the period. OUTLOOK... Brief restrictions are expected into the middle of next week as the weather pattern remains active. No sustained periods of IFR are predicted, although thunderstorms on Mon/Tue could lead to such restrictions. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.