With more than an inch of rain falling Tuesday morning, 2018 became the wettest summer on record in the State College area.
The precipitation, which was still continuing into the afternoon, pushed this year's total to 20.35 inches, surpassing the previous record of 19.83 inches set in 2003, according to the National Weather Service.
Central Pennsylvania has experienced extended periods of heavy rain throughout the summer that have caused creek and stream flooding, most recently on Aug. 3.
According to AccuWeather, the heavy rainfall this summer has been on par with what comes with hurricanes and tropical storms, even though no named storms have contributed to the deluge.
"The weather pattern this summer is one of the most dramatic outbreaks of rain ever to hit Pennsylvania and other states in the region in a non-tropical storm setting," said AccuWeather Chief Meteorologist Elliot Abrams.
It has rained 44 out of the last 75 days this summer, according to AccuWeather. Typically it rains one out of every three or four days in the summer. Tropical moisture funneling in from the Gulf of Mexico and Atlantic Ocean have triggered the frequent downpours, according to AccuWeather Hurricane Expert Dan Kottlowski.
There are still two more weeks to add to the total as well. Meteorological autumn begins on Sept. 1.
Centre County is under a flash flood watch into Tuesday night, with a slow-moving system bringing the possibility of locally heavy downpours. Already wet ground and elevated streamflows will contribute to an increased risk of flooding, according to NWS.
"Flood prone roads adjacent to streams could be eroded and washed out by high, fast-moving water," an NWS advisory said. "If you encounter water over the roads turn around and seek an alternate route. It is especially difficult at night to discern the depth of water over a road, even if that road may be washed out."