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September 2023


Stormlover74
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Dry weather will prevail through the remainder of the week. Temperatures will generally top out in the lower 70s in much of the region. Nights will see readings in the 50s in New York City, Newark, and Philadelphia with 40s possible in some of the colder suburbs.

Another storm will likely bring a significant rainfall to the region late Friday night into Sunday. Gusty winds and some coastal flooding are likely along the Jersey Shore, Connecticut Shore, and Long Island.

In the medium and longer range, a warmer than normal pattern could develop in eastern North America as September concludes.

The ENSO Region 1+2 anomaly was +2.9°C and the Region 3.4 anomaly was +1.6°C for the week centered around September 6. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +3.20°C and the ENSO Region 3.4 anomaly has averaged +1.38°C. El Niño conditions will likely continue to strengthen into the fall with the current East-based event transitioning to a basinwide El Niño for the upcoming winter.

The SOI was -26.14 today.

The preliminary Arctic Oscillation (AO) was +0.121 today.

On September 18 the MJO was not available. The September 17-adjusted amplitude was 1.591 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied 74% probability that New York City will have a warmer than normal September (1991-2020 normal). September will likely finish with a mean temperature near 70.7° (1.5° above normal).

 

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Records: 9/20


Highs:


EWR: 92 (1983)
NYC: 93 (1983)
LGA: 90 (1983)


Lows:


EWR: 44 (1979)
NYC: 44 (1993)
LGA: 46 (1979)

Historical:

 

1845 - A tornado traveled 275 miles across Lake Ontario, New York and Lake Champlain. (Sandra and TI Richard Sanders - 1987)

 

1909: A large and deadly Category 3 hurricane made landfall near Grand Isle, Louisiana during the late evening hours. The states of Louisiana and Mississippi showed catastrophic damage resulting in 371 deaths and $265 million in damage (2010 USD).

1926 - A hurricane which hit Miami, FL, on the 18th, pounded Pensacola with wind gusts to 152 mph. Winds raged in excess of 100 mph for four hours, and above 75 mph for 20 hours. (The Weather Channel)

1961: On September 10th, the Television Infrared Observation Satellite observed an area of thunderstorms west-southwest of the Cape Verde Islands, suggesting a possible tropical cyclone. This storm is the first large tropical cyclone to be discovered on satellite imagery and would eventually become Hurricane Esther. On September 20th, Hurricane Esther, a Category 4 storm off of Cape Hatteras, North Carolina began to slow down as it moved north-northeast well off the Jersey shore. The storm continued to weaken as it made a five-day loop south of Cape Cod, Massachusetts, then moved to Cape Cod and into Maine on the 26th.

1967 - Hurricane Beulah moved into South Texas, and torrential rains from the hurricane turned the rich agricultural areas of South Texas into a large lake. Hurricane Beulah also spawned a record 115 tornadoes. (David Ludlum)

1983 - The temperature at West Yellowstone MT plunged to six degrees below zero, while the temperature at San Francisco CA soared to 94 degrees. (The Weather Channel)

1987 - Afternoon and evening thunderstorms produced severe weather in Oklahoma and west Texas. In Oklahoma, a thunderstorm at Seiling produced three inches of rain in one hour, golf ball size hail, and wind gusts to 60 mph which collapsed a tent at the state fair injuring nine persons. (The National Weather Summary) (Storm Data)

1988 - Showers and thunderstorms produced locally heavy rains in central Wyoming, and snow in some of the higher elevations. Casper WY reported 1.75 inches of rain in 24 hours, and a thunderstorm north of the Wild Horse Reservoir produced 1.90 inches of rain in just forty minutes.

1989 - Hugo jilted Iris. Hurricane Hugo churned toward the South Atlantic Coast, gradually regaining strength along the way. Tropical Storm Iris got too close to Hugo, and began to weaken. A cold front brought strong and gusty winds to the Great Basin and the Southern Plateau Region, with wind gusts to 44 mph reported at Kingman AZ. (The National Weather Summary)

2005 - Hurricane Rita tracked through the Florida Straits and just south of the Florida Keys. Winds were sustained at tropical storm force at Key West, where peak winds gusted to 76 mph.

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