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
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 221823 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 223 PM EDT Sat Apr 22 2017 .SYNOPSIS...
-- Changed Discussion --
Low pressure tracking toward the Southeastern United States will continue to fuel rain chances over the ridges for the start of the new week.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
Surface high pressure under northern stream troughing is maintaining dry, but cool weather for the majority of the immediate area, but more light rain is streaming toward the I 68 corridor as moisture continues to be shunted through the eastern flank of a deepening Lower Ohio Valley low. The northern trough axis is projected to complete passage across the region tonight and push rain potential southward while cool and dry high pressure supports overnight lows a few degrees under the seasonal averages.
-- End Changed Discussion --
&& .SHORT TERM /SUNDAY THROUGH TUESDAY/...
-- Changed Discussion --
Meanwhile, the southern low is forecast to dig toward the Southeastern CONUS before progressing up the East Coast during the first half the week. This scenario should confine rain chances to the I 68 vicinity, and over the ridges and eastern CWA periphery during the period. Seasonably cool temperature will begin to moderate by Tuesday as heights rise in response to Western Conus troughing.
-- End Changed Discussion --
&& .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... Temperature is progged to rise 10 to 20 degrees above average for the latter half of the week as flow amplifies as broad, cold low pressure develops over the western CONUS. Shortwave energy and resulting moist southwest flow aloft will fuel rain chances, best potential for which currently looks to be on Wednesday night with the crossing of a negatively tilted trough axis. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... Low end VFR and MVFR stratus will continue to degrade conditions this afternoon as will light rain at MGW. By evening, the supporting upper trough is projected to shift east and improve conditions to VFR at all ports via building sfc high. .Outlook... The next chance for general restrictions is expected with mid week low pressure. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$ 15

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