Fog and low clouds socked in Pittsburgh early Monday, July 27, with river valleys and bridges vanishing into patchy mist while temperatures lingered in the mid-60s. Observations at the Allegheny County Airport (KAGC) showed visibility down to roughly five miles, slowing some early commutes on valley routes. Forecasters say the haze should burn off by mid-morning as the air heats up into the upper 80s.
Afternoon Storms And Timing
Patchy fog is expected to clear before about 8 a.m. Monday, July 27. After that, skies turn partly sunny with a high near 88°F. There is a slight chance of rain between noon and 2 p.m., with showers and thunderstorms becoming more likely later in the afternoon and evening, for an overall rain chance near 30 percent. Meteorologists at the National Weather Service note that any afternoon storm could deliver brief heavy downpours that cut visibility and leave roads slick in a hurry.
Overnight And Tuesday Risk
Tonight into early Tuesday the odds of showers and thunderstorms ramp up, with storms likely overnight and new rainfall amounts of about a quarter to a half inch possible and roughly a 70 percent chance of precipitation. Forecast guidance from the National Weather Service indicates the larger squall-line threat has trended downward, but a non-zero risk remains for isolated damaging wind gusts if storms manage to organize along outflow boundaries.
Commute And Outdoor Plans
If you have evening plans on Monday or an early-morning drive on Tuesday, a quick-dry jacket and a little extra travel time are good bets. Intermittent heavy downpours and locally gusty, erratic winds can make for jumpy braking and sudden spray on busy roads. Widespread flooding is not expected, but repeated storms over the same neighborhood could still cause brief ponding on low-lying streets and in poor-drainage spots.
Rest Of The Week
After Tuesday's frontal passage, forecasts point to a cooler, drier stretch, with seasonable highs in the low 80s through Thursday and more sunshine by late week. Anyone eyeing outdoor plans for the weekend should keep an eye on later updates, since another disturbance could nudge isolated storm chances higher by Saturday into Sunday.
