Extreme rain resulted in flooding across the Northeast on Sunday. Records were smashed, including an all-time record rainfall at the JFK International Airport in NYC.
The New York City JFK Airport set the wettest day on record with 7.80 inches on Sunday. This smashed the all-time daily rainfall record of 6.27 inches on June 30, 1984. The old daily rainfall record was 0.96 of an inch of rain set in 2008.
The normal rainfall for the month of August at the JFK Airport is 3.68 inches, so nearly twice the normal monthly rainfall was delivered in one day.
Cars submerged under floodwaters in Staten Island, New York City on Sunday August 14, 2011. Photo courtesy of AccuWeather.com Facebook fan Mike B.
The excessive rainfall amounts in the Northeast with this storm are more on par with the rain from a tropical storm or a hurricane. Significant flooding resulted in many communities. Many roads were closed and swift water rescues performed as flood waters rose quickly.
Topping the list of excessive rainfall amounts, Lido Beach, N.Y., got an astounding 10.87 inches of rain.
Newark, N.J., was deluged by 6.40 inches of rain. This broke the old rainfall record of 1.11 inches set in 1999.
Philadelphia got 4.84 inches of rain on Sunday, shattering the old daily rainfall record of 1.77 inches set in 1977. The inundating rain surpasses the normal monthly rainfall of 3.50 inches.
More daily rain records set on Sunday:
-New York City (LaGuardia Airport): 6.60 inches; old record 3.51 inches/2005
-New York City (Central Park): 5.81 inches; old record 3.10 inches/2005
-Islip, N.Y.: 5.31 inches; old record 1.04 inches/1994
-Trenton, N.J.: 4.66 inches; old record 3.40 inches/1999
-Bridgeport, Conn.: 2.75 inches; old record 1.79 inches/1999
Contributing Factors to the Flood Situation
The main reason for the flooding is that the storm system that has been unleashing the rainfall moved very slowly across the mid-Atlantic, allowing torrential downpours to keep moving across the same areas repeatedly.
The storm system was able to tap into moisture from both the Gulf of Mexico and the Atlantic.
Unfortunately, the storm system will skirt slowly up the Northeast Coast through tonight, allowing more heavy rain to pour down and aggravate flooding.
Another factor of the flooding is the fact that there has been a very dry pattern set up across the Northeast this summer. When there has been a dry pattern in place, water is not able to penetrate the parched soil as easily.
The U.S. Drought Monitor release on Aug. 9, 2011, shows abnormally dry to moderate drought conditions across portions of the Northeast. The dry conditions are likely a contributing factor to some of the flooding.
The total of 7.80 inches of rain that fell at the JFK International Airport is almost as much rain that fell during the months of May, June and July combined (7.96 inches).
Several storms will bring periods of rain and gusty winds to the west coast of the United States this week.
Colder weather, and in some cases, a taste of winter with snow will continue to invade the northeastern United States this weekend.
Dry weather set to dominate the southern United States into November will only worsen the already extreme drought conditions.
The changing of the seasons will bring beneficial rainfall to northern Brazil, a region that has experienced severe drought over the past several years.
Damaging storms pounded the Pacific Northwest, while two powerful typhoons struck the Philippines within a four-day span.
Typhoon Haima made a second landfall in southeast China on Friday after leaving at least 13 dead in the northern Philippines.
Newbury, VT (1843)
12 inches of snow.
East Coast, USA (1878)
"Gale of '78;" hurricane center over Richmond, VA. Washington, DC. barometer reading of 28.78"/975 mb. Cape May had winds of 84 mph from the SE. Highest tide ever for the Delaware River. Winds 100 mph at Wilmington, DE. Severe damage in Philadelphia.
Off British Columbia Coast (1918)
The Princess Sophia struck a coastal reef in severe storm and sank. All 343 aboard drowned.