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County Warning Area [CWA]: PBZ
Regional NWS Weather Office: Pittsburgh, PA
County Warning Area [CWA]: PBZ
Regional NWS Weather Office: Pittsburgh, PA
000 FXUS61 KPBZ 211248 AFDPBZ Area Forecast Discussion National Weather Service Pittsburgh PA 748 AM EST Tue Jan 21 2020 .SYNOPSIS... After scattered flurries this morning, dry weather is expected through Thursday under building high pressure. Precipitation chances return Friday through the weekend with crossing low pressure. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... Mid-morning update: Minor adjustments were made to temperature based on surface observations. Previous discussion follows... Areas of stratocu and flurries should continue this morning with moisture below a temperature inversion, and cold nrly flow off the lakes. The clouds and flurries are expected to slowly erode later today as subsidence increases under building high pressure. Highs are expected to be around 5 degrees below seasonable levels. && .SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/... Ridging should maintain dry weather as it moves east across the region through the period. A gradual warming trend is also expected, with temperatures above average by Thursday with SW flow aloft as the ridge axis shifts east of the area. && .LONG TERM /FRIDAY THROUGH MONDAY/... An upper low is progged to track E from the Upper Midwest, reaching the Upper OH Valley region Friday night and Saturday. Rain and snow chances should increase with the approach and passage of the low. Snow chances should continue Sunday as the upper low tracks to the E Coast, and a shortwave trough rotates around it. Another trough in NW flow aloft should maintain slight to low precip chances Monday. Temperatures are expected to average near or a few degrees above seasonable levels. && .AVIATION /13Z TUESDAY THROUGH SATURDAY/... Relative moisture under a fairly shallow inversion will support MVFR stratocu and flurries through this morning in cold airmass over the region. Slightly backing flow to the nw in response to an upstream shortwave is likely to maintain that support until increasing subsidence suppresses the potential by aftn. Expect VFR and light wind thereafter. .Outlook... Restrictions are likely again by Fri with the approach of low pressure. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...None. OH...None. PA...None. WV...None. && $$
| Forecast Discussion from: NOAA-NWS | Script developed by: El Dorado Weather |
