Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | 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 210410 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 1210 AM EDT Wed Mar 21 2018 .SYNOPSIS... Snow will continue overnight, before gradually tapering off Wednesday. && .NEAR TERM /THROUGH TODAY/... Snow is expected to continue through part of the day as low pressure crosses the OH Valley and Mid Atlantic regions. Will maintain current advisories and warnings as is with the forecast accumulations expected. Coastal sfc low development is expected later today as the mid/upper low nears the E Coast. This should result in a gradual end to the snow from N-S through the day. Temperatures are expected to range from around 5 to 15 degrees below seasonal levels. && .SHORT TERM /TONIGHT THROUGH FRIDAY/... Dry weather returns amid shortwave ridging Wed night and Thu. Below-average temperature is expected to persevere as nwly flow supplies a steady source of cooler air. Some models indicate the passage on Fri of a shortwave trough in nwly flow. A lack of moisture may preclude snow showers, but this period may be one to watch for needed forecast adjustments. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... A srn-stream low is noted in most medium-range model forecasts during the Sat/Sun timeframe. However, the nrn extent to which its precipitation shield can spread differs by model. It does appear that the nrn-stream ridge building in the Great Lakes region over the weekend could limit its influence on the Ohio Valley, but a wintry mix is not out of the question. Upper-level wave breaking late in the weekend and eventual swly flow aloft will lead to a warm-up to near seasonal average beginning early next week. But such a pattern also will increase chances for precipitation. && .AVIATION /04Z WEDNESDAY THROUGH SUNDAY/... MVFR cig restrictions with IFR in snow can be expected into Wednesday before improvement begins from the northwest. OUTLOOK... Restrictions, albeit with contd gradual improvement, are likely into Thursday morning. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...Winter Storm Warning until 8 PM EDT this evening for MDZ001. OH...Winter Weather Advisory until 8 PM EDT this evening for OHZ039>041-048>050-057>059-068-069. PA...Winter Weather Advisory until 8 PM EDT this evening for PAZ013- 014-020>023-029-031-073-075. Winter Storm Warning until 8 PM EDT this evening for PAZ074- 076. WV...Winter Weather Advisory until 8 PM EDT this evening for WVZ001>004-012-021-509. Winter Storm Warning until 8 PM EDT this evening for WVZ510>514. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.