Warm air that has been pent up over the Plains much of this past week has made the trip to Pittsburgh and will stick around into early next week.
The pattern will bring high temperatures in the 80s most days through Tuesday.
While there will be long episodes of rain-free weather, the pattern can also deliver a few disruptive downpours.
While some dry air will mix down from aloft and allow more in the way of sunshine on Mother's Day, it may not be enough to prevent spotty, pop-up thunderstorms from developing during the afternoon and evening.
Cooler air is projected to move in at midweek.
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Following a bright, dry and increasingly mild weekend in the northeastern U.S., a rainy midweek is in store for the region.
A storm which will bring the risk of flooding downpours early this week.
The resurgence of heat will come back with a vengeance this week as the highest readings so far this year will be rivaled.
Following the most significant rain event since last year, residents of the south-central United States may be wondering if more beneficial wet weather is on the way.
While lovers of springtime are often appalled by a snowy forecast after March 21, many major U.S. cities have received measurable snowfall well into April and even May.
Whilst Thursday was the warmest day so far this year across the United Kingdom, the mild air will hang on for this weekend's London Marathon and St. George's Day festivities.
Clear skies will allow many across Europe to view the peak of the annual Lyrid meteor shower on Saturday night.
The threat for heavy and locally strong thunderstorms will slowly shift eastward across the southern United States into Monday.