Since the beginning of the year, Pennsylvania has gotten so much rain — 40.2 inches just through August — it has smashed every eight-month rainfall total since 1895, when record-keeping began.
An Inquirer analysis of National Weather Service data also shows that the January-through-August average since 1895 has been 29.1 inches. And this year's record doesn't even include last weekend's drenching. The impact of Hurricane Florence, though it's too soon to predict, could mean far more precipitation is on the way.
In general, the areas north and west of Philadelphia have been hit the hardest, with Reading seeing more than triple its historic average level of precipitation the last 30 days.
Forecasters and officials are watching Florence's track closely to see what it could mean for an already soggy state.
"We don't know the path Florence will take and if it will even affect us," said Jeff Kolakowski, a representative for Philadelphia's Office of Emergency Management.
Summer has been abnormally wet, leading to fears of mosquito-borne illness such as West Nile virus. Pennsylvania officials say it was a record year for mosquitoes because of the rain. Rainfall from June through August in Pennsylvania was way above average in many areas of the state.
Pennsylvania's average total summer precipitation, dating back to 1895, is 12.4 inches. This summer it was 18.8 inches, or 51 percent above normal.
Philadelphia recorded 7.20 inches from Friday through Monday afternoon. That brings the total to 40.37 inches for the year — or 11.30 inches above average.
In addition to the death in Upper Merion, this year's rains have had an extraordinary impact. Some examples from the summer:
Alex Staarmann, a meteorologist with the National Weather Service office in Mount Holly, said it's too soon to know what Florence will mean for the Philadelphia and South Jersey region.
"The further north it tracks, the more an impact it would have on Philadelphia and South Jersey," Staarmann said. "However, regardless of where it ends up, we'll still have concerns for coastal and marine zones with high rip currents and surf, and more coastal flooding."
Staarmann noted that whatever additional rain comes, it will be hitting ground that already is saturated. That means strong winds could topple trees.
"That certainly leads to more concerns with flooding potentially for this weekend," Staarmann said. "It's been quite wet this year."
Current National Hurricane Center projections have Florence making landfall in the Carolinas on Friday. Dave Dombek, a senior meteorologist with AccuWeather, said forecasters should have a good idea by Wednesday of Florence's potential.
"One scenario is that Florence slows down and stalls, and rains itself out over the Carolinas. That would not have much impact (in Philadelphia)," Dombek said. "Another scenario is that it continues on a northwest course that takes it over the Smoky Mountains and toward the Ohio Valley, bypassing the Philadelphia area.
"And of course, one scenario is that it does slow down and comes northward carrying tons and tons of tropical moisture," he continued. "So you'd be looking at it having an impact this weekend. You could be looking at anywhere from an inch or 2 to 5 or 10 inches. That's a worst-case scenario. But, at this juncture, I don't have any answers yet."
David Robinson, a Rutgers University professor and New Jersey state climatologist, said that although summer rainfall was close to normal in his state, it's been a wet year overall for South Jersey, especially so far in September. Already, just 10 days into the month, many areas have seen more rain than in an entire normal month.
Robinson said the big concern in New Jersey is the coast, which has already experienced moderate flooding since the weekend. Coastal flooding comes from ocean water being pushed toward the shoreline by winds.