September 2026

[donsutherland1]

Tomorrow will be another variably cloudy day. Highs should reach the middle and upper 60s.

Some periods of rain and showers are possible late Friday through the weekend. The extent of the precipitation will depend on the track of a developing storm. For now, the system looks to pass far enough from the region to produce lighter to moderate amounts of precipitation in the immediate New York City area. Coastal erosion and some flooding at high tide appears likely. Long Island, especially Suffolk County, could experience gusty winds with some periods of heavy rain.

Uncertainty still exists in terms of track and timing. Temperatures will remain unseasonably cool through the weekend with highs mainly in the lower and middle 60s. 
 
The ENSO Region 1+2 anomaly was +4.6°C and the Region 3.4 anomaly was +3.0°C for the week centered around September 16. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +4.33°C and the ENSO Region 3.4 anomaly has averaged +2.73°C. Both ENSO regions have tied their all-time warmest anomalies. The ongoing strong El Niño, will continue to strengthen through the mid-fall. 

The SOI was -12.06 today.

The preliminary Arctic Oscillation (AO) was +0.757 today. 

Based on sensitivity analysis applied to the latest guidance, there is an implied near 67% probability that New York City will have a cooler than normal September (1991-2020 normal). September will likely finish with a mean temperature near 68.5° (0.7° below normal). 

Supplemental Information: The projected mean would be 0.5° above the 1981-2010 normal monthly value. 

 

[MJO812]

53 here

[steve392]

4 degree drop since coming into work.  Sitting at 49 degrees in Kearny. 

[MANDA]

Decidedly October feel out there this morning.  Overnight low of 44 with a gusty NE wind.  Seems Summer has fallen off the cliff.

[SACRUS]

61 / 48 Northern Cal like marine flow feel NNE.   Upper 60s to low 70s today and then Friday the warmest day of the next 5 as we deal with the cut off ULL and coastal Fri night - Monday.  Beyond there overall warmer 9/29 - 10/5.  We'll see if the trough digs back after then or moderates to near normal by the 7th.

 

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[SACRUS]

 

Records:

Highs:

EWR: 92 (2017)
NYC: 91 (2017)
LGA: 91 (2017)
JFK 92 (2017) 


Lows:

EWR: 40 (1950)
NYC: 40 (1963)
LGA; 44 (1974)
JFK: 40 (1963)

Historical:

 

 

1869: Heavy rain dumps nearly 10 inches on the White Earth Reservation, MN. (Ref. AccWeather Weather History)

1888: The earliest frost of record hit the southern states, covering South Carolina, Georgia and, northern Florida. (Ref. AccWeather Weather History)

1926 - The temperature at Yellowstone Park dipped to nine degrees below zero. It was the coldest reading of record in the U.S. during September. Severe freezes were widespread over the northwestern U.S. causing great crop destruction. In Washington State, Spokane County experienced their earliest snow of record. Harney Branch Experiment Station in Oregon reported a temperature of 2 degrees above zero to establish a state record for the month of September. (David Ludlum) (The Weather Channel)
 

1926: The temperature at Yellowstone Park drops to 9 degrees below zero, making it the coldest September reading ever recorded in the US.

1939: A thunderstorm on this day dropped 6.45 inches in six hours at Indio, CA. This rainfall preceded “El Cordonazo” or “The Lash of St. Francis”, an actual tropical storm. For the entire storm, which started on this day and ended on the 26th, four inches of rain fell across the deserts and mountains as a dying tropical cyclone moved across Baja California into southwestern Arizona. This storm was the second tropical cyclone to impact California during this month. A strong El Niño may have contributed to the activity. The tropical storm produced 50 mph winds over the ocean and estimated seas of 40 feet. September rain records were set in Los Angeles with 5.66 inches and 11.6 inches at Mt. Wilson. 45 people died from sinking boats, and harbors were damaged. Total damage was estimated at $2 million. Californians were unprepared and were alerted to their vulnerability to tropical storms. In response, the weather bureau established a forecast office for Southern California, which began operations in February of 1940.

1950 - A smoke pall from western Canada forest fires covered much of the eastern U.S. Daylight was reduced to nighttime darkness in parts of the Northeast. The color of the sun varied from pink to purple, blue, or lavendar. Yellow to grey-tan was common. (24th-30th) (The Weather Channel)

1956: Hurricane Flossy made landfall near Destin, Florida as a Category 1 storm. 

1972 - Lightning struck a man near Waldport, OR, a young man who it so happens was carrying thirty-five pieces of dynamite. (The Weather Channel)

1975: Remnants of Hurricane Eloise merge with a frontal system over Northeast, resulting in tremendous flooding. (Ref. AccWeather Weather History)

1984: Behind a strong cold front, Bismarck, ND had a record early season snowfall of 5 inches, their heaviest September snowfall. Along with the snow came record cold temperatures across parts of the northern Rockies. Billings, MT recorded their coldest September temperature of 22° followed by an afternoon high of just 31°. Other daily record lows included: Sheridan, WY: 13° and Casper, WY: 22°. Ahead of the front, along with dramatically warmer temperatures, by as much as 40 degrees plus, upper level dynamics were in place for severe weather. Crawford and Vernon Counties in Wisconsin reported baseball sized hail and 3 inch diameter hail was reported in La Crosse County, Wisconsin with this same cluster of storms. (Ref. Wilson Wx. History)

1986: An F2 tornado, unusually strong for one in California, touched down just southeast of Vina on this day and traveled two miles through an agricultural area. A mobile home was destroyed, injuring a 22-year-old occupant. Eleven other buildings were damaged or demolished, and 50 acres of walnut orchards were flattened.

1987 - The first full day of autumn proved to be a pleasant one for much of the nation, with sunny skies and mild temperatures. Thunderstorms again formed over Florida and the southwestern deserts, and also formed along a cold front in the northeastern U.S. A storm spotter at Earp CA sighted a couple of funnel clouds, one on the California side of the state line, and the other on the Arizona side. (The National Weather Summary) (Storm Data)

1988 - Thunderstorms developing along a stationary front produced large hail and damaging winds in the southeastern U.S., with reports of severe weather most numerous in North Carolina. Golf ball size hail was reported at Tick Creek and a number of other locations in North Carolina. (National Weather Summary) (Storm Data)

1989 - Forty-seven cities between the Rockies and the Appalachians reported record low temperatures for the date. Lows of 38 degrees at Abilene TX, 34 degrees at Jackson KY, and 36 degrees at Midland TX established records for the month of September. The low of 36 degrees at Midland smashed their previous record for the date by thirteen degrees. Fayetteville AR and Springfield MO reported their earliest freeze of record. Thunderstorms produced torrential rains in northeastern Florida. Jacksonville was deluged with 11.40 inches of rain, and flash flooding resulted in two deaths. (The National Weather Summary) (Storm Data)

2001: A weak, F0 tornado passed in the sight of the Washington Monument. Soon after, an F3 tornado struck College Park, Maryland.

 

2001: It was just 13 days after the 9/11 terrorist attack when the Emergency Action Notification System sounded in Washington, DC. Many people immediately thought the alert was for another attack, but it was actually for a tornado warning. The dramatic severe weather statement from the National Weather Service at Sterling, VA was that a tornado had been sighted near the Pentagon. (Ref. Wilson Wx. History)

2005 - Early in the morning, major Hurricane Rita came ashore near the Texas/Louisiana border

 

2005: Early on the morning of September 24, 2005, Major Hurricane Rita came ashore near the Texas/Louisiana border. 

[SACRUS]

Wonder if there is a NNE flow