Below article from wunderground.com
Jonathan Erdman
Published: January 3, 2019
After topping the record, it would tack on almost 5 inches of additional rain in the latter half of December.
Washington D.C. set a record-wet November, fifth-wettest September, fourth-wettest July and sixth-wettest May, according to National Weather Service records dating to 1871. Only January, March and October were drier-than-average in 2018 in the nation’s capital.
As impressive as that record is, Baltimore’s BWI Airport topped its previous record-wet year – 62.66 inches in 2003 – in mid-November and crushed that record by over 9 inches.
For the first time, over 60 inches of precipitation was measured in a year on the Penn State University campus.
Not surprisingly, the mid-Atlantic states saw a record number of flood events in 2018, pointed out by the National Weather Service Middle Atlantic River Forecast Center.
Other yearly precipitation records were set in Pittsburgh (57.83 inches), Charleston, West Virginia (67.05 inches), Louisville, Kentucky (68.83 inches), and Columbus, Ohio (55.18 inches).
Lynchburg, Virginia, easily surpassed its previous record-wet year in 1972, which included Hurricane Agnes, a prolific eastern U.S. flood-producer.
(MORE: Weird Drought Affecting Alaska in One of Wettest U.S. Locations)
Wilmington, North Carolina, crushed its previous record-wet year during Hurricane Florence in mid-September. On Dec. 15, the city reached 100 inches of yearly precipitation for the first time in records dating to 1871.
Even taking away Florence’s rainfall, Wilmington would have had its second-wettest year.
Perhaps more staggering, an all-time state yearly rain record appears to have fallen in South Carolina.
According to the National Weather Service, 123.45 inches of precipitation was recorded at the Walhalla State Fish Hatchery west-northwest of the town of Jocassee, South Carolina, in 2018.
If the measurement is accepted after further review by the State Climate Extremes Committee, it would be the heaviest yearly precipitation total on record for any location in South Carolina.
Yearly precipitation surpluses of at least a foot covered rather staggering swaths of the East, South and Midwest.
Among the most impressive yearly precipitation surpluses included:
- Wilmington, North Carolina: 44.79-inch surplus
- Williamsport, Pennsylvania: 28.74-inch surplus
- Beaumont/Port Arthur, Texas: 28.28-inch surplus
- Louisville, Kentucky: 23.92-inch surplus
- Athens, Georgia: 22.93-inch surplus
Eight states in the East – Delaware, Maryland, Massachusetts, North Carolina, Pennsylvania, Rhode Island, Virginia and West Virginia – had the wettest first 11 months of any year in records dating to 1895, according to NOAA’s November U.S. climate report.
NOAA’s complete 2018 U.S. report is expected to be issued during the second week of January.
Rainfall from Hurricane Florence in mid-September, one of the nation’s heaviest rain events on record, played a significant role in these whopping 2018 totals in parts of the Carolinas.
A number of heavy rain events – including in Ellicott City, Maryland, in late May and in Pennsylvania’s lower Susquehanna Valley in late July – contributed to a waterlogged 2018 in the mid-Atlantic states.
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