Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 241833 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 233 PM EDT Sat Jun 24 2017 .SYNOPSIS... Sunshine and lower humidity are the main headlines this weekend. Scattered showers are possible Sunday afternoon with a passing upper level system. Widespread 60s are forecast highs Monday and Tuesday, not the best pool day. && .NEAR TERM /THROUGH SUNDAY/...
-- Changed Discussion --
Rapidly cooling 500 mb temperatures have allowed for cumulus buildups quickly through the daytime hours. As the 500 mb front slides from OH into PA as of 230 PM, a few showers are beginning to develop along it. This is likely exclusively due to it being peak heating, thus the lapse rates are far stronger now than they will be in a few hours. Isolated showers have been added to the forecast along the front as it slides through the area in the next few hours with quiescent conditions returning thereafter. Fries Welcome benign weather takes over the the near term. Isolated showers and perhaps a thunderstorm are possible Sunday afternoon during peak heating with the passing pocket of cooler mid level temps. Any shower or storm will be brief Sunday. Temps and humidity levels will be a welcome relief with highs slightly below normal and dewpoint in the 40s to lower 50s.
-- End Changed Discussion --
&& .SHORT TERM /SUNDAY NIGHT THROUGH MONDAY NIGHT/... Monday will follow a similar pattern as Sunday, with a shortwave trough digging into the Great Lakes. Models continue to show this trough sliding further south than the previous shortwave. Again, bolstered by steepening lapse rates, showers and thunderstorms are expected to spread southward through the afternoon and evening. Rain chances will continue into Monday night as the main upper-level trough axis passes overhead. Temperatures will continue to cool through the early part of the week, dropping around 3-5F off the daily highs and lows from today`s expected numbers. By Monday, temperatures will be about 10 degrees below average. && .LONG TERM /TUESDAY THROUGH SATURDAY/... The middle of the week will feature cool temperatures, left over from persistent northwest flow from the broad upper trough. Despite building high pressure at the surface, rain chances will exist Tuesday before the axis of the main trough finally shifts east of the area. High pressure will take firm hold of the area Wednesday into Thursday, restoring dry conditions areawide and allowing temperatures to begin moderation. By the latter part of the week, the center of the high shifts to just off the Mid- Atlantic coast. This will will establish a return to a warm and humid airmass that will fuel showers and thunderstorms by the early weekend. Currently, the best chance of precipitation exists on Saturday, as low pressure returns to the Great Lakes. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... High confidence forecast. VFR conditions will continue through the period. Gusty winds will decrease near sunset as high pressure builds over the terminals. More of the same Sunday with diurnal cu developing midday. .OUTLOOK... Chance for restrictions will come with afternoon convection on Sunday and Monday as an upper trough settles over the region. && .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.