582 FXUS61 KPBZ 090511 AFDPBZArea Forecast Discussion National Weather Service Pittsburgh PA 111 AM EDT Tue Sep 9 2025
.SYNOPSIS... Dry conditions and and seasonable temperatures can be through the week. There is a slight chance precipitation returns by the end of the upcoming weekend.
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.NEAR TERM /THROUGH TODAY/... KEY MESSAGES:
- Dry and sunny conditions continue today. ---------------------------------------------------------------
High pressure centered over the region will allow for maximum radiational cooling with clear skies and light winds, so isolated river valley fog will be possible this morning given the relatively warm river temperatures. Overnight lows will bottom out around 10 degrees below normal across the region on average.
Dry and clear weather will continue today, with temperatures returning close to seasonal norms with rising heights / increased thickness.
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.SHORT TERM /TONIGHT THROUGH WEDNESDAY NIGHT/... KEY MESSAGES:
- Dry weather with a gradual warming trend - Possible valley fog in the morning hours --------------------------------------------------------------
Latest ensemble guidance shows good continuity with previous runs, and there is still relatively high confidence of dry conditions and a warming trend in temperatures with surface high pressure in control. Forecast temperatures are back to normal by Wednesday.
With limited cloud coverage, radiational cooling during the night will allow lows to consistently drop below normal through the period, and have blended in NBM 10th percentile minimum temperatures to account for this. Additionally, patchy river valley fog will be possible each morning.
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.LONG TERM /THURSDAY THROUGH MONDAY/... KEY MESSAGES:
- Warming temperatures and dry conditions continue - Temperature and precipitation uncertainty increases this weekend ------------------------------------------------------------------
High confidence that the dry pattern continues into the weekend, as ensemble guidance continues to show good run to run continuity.
Ridging / sfc high pressure will maintain dry conditions before the potential for an upper shortwave dropping out of Canada increases precipitation chances later in the weekend. Latest ensemble guidance shows a 5-15% chance of >0.01" of precipitation during any 6hr period Sunday and Monday, with highest chances north of PGH.
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.AVIATION /05Z TUESDAY THROUGH SATURDAY/... High pressure centered NE of the area will maintain VFR and light E-SE wind through the TAF period. Convective temperatures are expected to be higher today than recent days, precluding a cumulus layer outside of the ridges.
.OUTLOOK.... High pressure is expected to maintain VFR conditions through Saturday. A crossing upper trough could result in an increase in mid level clouds Thursday, though the surface high should maintain dry weather.
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.PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None.
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SYNOPSIS...88 NEAR TERM...88 SHORT TERM...88 LONG TERM...88 AVIATION...WM
NWS PBZ Office Area Forecast Discussion