A zone of very drenching rain will push slowly eastward across into Thursday night across the Pittsburgh area.
The rainfall has the potential to bring flash, urban and small stream flooding, especially to areas around and north and east of the city through the Laurel Highlands.
Much cooler air will be felt beginning late Thursday night as a front pushes off to the east.
The passage of this front will mark the end of the risk of severe weather and flash flood threat, but not the end for shower activity through the weekend.
A storm in the upper atmosphere and the associated chilly air will allow a mosaic of showers to develop each day Friday through Monday.
While it may not rain much each day, it can rain just enough to cause disruptions to outdoor projects and activities.
Cloud cover and a breeze should prevent temperatures from dipping to frosty levels in the upcoming pattern.
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Hurricane Maria will likely come close enough to North Carolina to trigger gusty winds and rain, while unleashing dangerous seas elsewhere along the East Coast this week.
A cold front will spread needed rainfall across drought-stricken parts of eastern Australia during the middle of the week.
The cold front that is expected to whisk Hurricane Maria back out to sea after it nears North Carolina will trim the summerlike warmth out of the midwestern and northeastern United States this week.
Emergency officials in Puerto Rico evacuated tens of thousands of people on Friday afternoon due to an imminent dam failure in the nearby areas of Isabela and Quebradillas, following Hurricane Maria's devastating blow.
Tropical Storm Pilar is expected to churn up rough seas and raise the risk for flooding downpours across southwestern Mexico this week.
Thousands of people have been evacuated from their homes on the Indonesian island of Bali due to fears of Mount Agung potentially erupting.
Recent earthquakes near North Korea’s nuclear test site have raised questions as to how far radioactive material would travel if an underground atomic explosion triggers a leak.
While no new threats are lurking behind Maria and Lee this week, residents of the Caribbean and United States should not let their guard down as tropical season is far from over.