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September 2025 OBS-Discussion centered NYC subforum


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Records:

Highs:

EWR: 89 (1986)
NYC: 89 (1986)
LGA: 88 (1988)
JFK: 84 (1986)


Lows:

EWR: 38 (1942)
NYC: 39 (1912)
LGA: 43 (1947)
JFK: 43 (1991)

Historical:

1875: What weather observers “observe” has changed with time. Among the remarks noted by the Lynchburg, VA observer, was today’s migration of hundreds of squirrels across the James River. (Ref. Weather Guide Calendar with Phenomenal Weather Events 2011 Accord Pub. 2010, USA)

1892: Central Park in New York City, NY concluded its wettest month ever with 16.85 inches of rain. (Ref. Wilson Wx. History)

1896 - A hurricane formed on September 22 and lasted until September 30. It formed directly over the Lesser Antilles and hit Cuba, Florida, Georgia, South and North Carolina, Virginia, Washington D.C., and Pennsylvania. Its maximum sustained winds were at 130 mph. The heaviest rainfall deposited in association with the storm was 19.96 inches at Glennville, Georgia. This hurricane was responsible for an estimated 130 deaths and $1.5 million in damage (1896 dollars).

1896: A hurricane moving through the Caribbean Sea and the Gulf of Mexico. The system then tracked inland through the Southeast to the west of Washington, DC. Richmond suffered severely from the cyclone. Communication was gone early on during the storm the only line that remained open belonged to Western Union, the wire than ran to Wilmington, NC. The steeple of the Second Baptist church yielded to the storm, falling across main street. The Governor's Mansion survived the cyclone reasonably well. Damage totaled $150,000 at the state capital. In Petersburg the Imperial Hotel was unroofed. Smaller buildings experienced great damage. Fredericksburg saw its St. George's church steeple injured by the cyclone. In Alexandria the Third Baptist Colored church was razed to the ground ($5000). Over forty windmills were wrecked at Falls Church. Manassas saw its Evangelical Lutheran church blown six inches off its foundation. It was one of the worst storms on record in the District of Columbia as five-minute sustained winds peaked at 66 mph and gusts reached 80 mph; the pressures fell to 29.14" around 11 p.m.. At 10:30 p.m., the steeple to the New York Avenue Presbyterian Church crashed to the ground. A five story brick building was demolished, injuring the adjoining buildings, trapping five men under debris. Many buildings were unroofed. Capitol Hill saw even greater damage. Georgetown experienced its worst storm ever. A few panes of glass at the White House were shattered as well. Winds began to subside by 12:55 a.m.. In all, a $390,000 in damage was incurred. A flash flood at Staunton, along Lewis Creek, overran its banks, killing five. Seven inches of rain on the 30th swelled a large lake near the town, bursting its dam at 10 p.m.. Alarms were sounded as torrents of water rushed down Central Avenue, submerging everything in its path. Twenty-five houses were moved from their foundations before crumbling in the angry waters ($500,000). On the 1st, the and Chesapeake & Ohio Canal merged into one as flood waters increased their height and breadth.
(Ref. for 1896 Fall Storm)

1924: Norfolk saw winds reach 76 mph sustained from a cyclone that became nontropical over the Southeast U.S.. In Fauquier county, four inches of rain fell at Leads Manor on the 29th. In Richmond county, 4.60" of rain fell at Warsaw on the 30th. Richmond, VA recorded 2.19 inches of rain on the 29th and 2.85 inches on the 30th for a total of 5.04 inches. Leeds Manor (4.00"), Stuart (4.20"), Urbanna (3.80"), and Winchester (2.05") all set 24-hour rainfall records for September during this tempest. East Coast Rain Storm

1932: Southern California: Tropical cyclone rainfall of 4.38 inches at Tehachapi in 7 hours causes flash floods on Auga Caliente and Tehachapi Creeks resulting in 15 deaths. (Ref. WxDoctor)

1934: DCA had the wettest September on record 17.45 inches at 24th and M street in Washington, DC. (Ref. Washington Weather Records - KDCA)

1943: A tropical storm that formed southwest of Bermuda moved to the northwest and into the Delmarva Peninsula overnight October 1 then dissipated in extreme northeastern Maryland as a depression. Atlantic City, NJ measured a gust to 78 mph and Cape Henry, VA gusted to 72 mph. (Ref. Wilson Wx. History)

1959 - Three tornadoes spawned by the remnants of Hurricane Gracie killed 12 persons at Ivy VA. (The Weather Channel)

1961: An early season snowfall occurred over the Northern Plains with the greatest total of 4 inches falling in the New Ulm- Mankato area in Minnesota. Austin, MN had their earliest measurable snowfall with half an inch. Omaha, NE had its first September snow in 70 years. (Ref. AccWeather Weather History)

1970: A nineteen-month drought in southern California came to a climax. The drought, that made brush and buildings tinder dry, set up the worst fire conditions in California history as hot Santa Anna winds sent the temperature soaring to 105 degrees at Los Angeles, and to 97 degrees at San Diego. During that last week of September whole communities of interior San Diego County were consumed by fire. Half a million acres were burned, and the fires caused fifty million dollars damage. (David Ludlum)

1970 - A nineteen month drought in southern California came to a climax. The drought, which made brush and buildings tinder dry, set up the worst fire conditions in California history as hot Santa Anna winds sent the temperature soaring to 105 degrees at Los Angeles, and to 97 degrees at San Diego. During that last week of September whole communities of interior San Diego County were consumed by fire. Half a million acres were burned, and the fires caused fifty million dollars damage. (David Ludlum)

1977 - The temperature at Wichita Falls, TX, soared to 108 degrees to establish a record for September. (The Weather Channel)

1979: This was the eighth day of 29 consecutive days when no measurable rain fell at Chicago, IL. The only measurable rain for the month came on the 1st with 0.01 inches. This was their driest September on record. Rockford, IL only received 0.05 inches of rain; their driest month ever. (Ref. Wilson Wx. History)

1985: An early season snowstorm covered much of the Arrowhead Region of Minnesota with 7 to 9 inches of snow. Some snow depths reported for the event, which ended the next day, were 7 inches at Babbitt and Aurora, 7.5 inches at Isabella, and 8.5 inches at Poplar Lake. (Ref. AccWeather Weather History)

1986 - Thunderstorms, which had inundated northern sections of Oklahoma with heavy rain, temporarily shifted southward producing 4 to 8 inches rains from Shawnee to Stilwell. Baseball size hail and 80 mph winds ripped through parts of southeast Oklahoma City, and thunderstorm winds caused more than half a million dollars damage at Shawnee. (Storm Data)

1987 - Afternoon thunderstorms in Michigan produced hail an inch in diameter at Pinckney, and wind gusts to 68 mph at Wyandotte. A thunderstorm in northern Indiana produced wet snow at South Bend. Seven cities in the northwestern U.S. reported record high temperatures for the date, including readings of 98 degrees at Medford OR and 101 degrees at downtown Sacramento CA. (The National Weather Summary) (Storm Data)

1988 - Unseasonably warm weather prevailed over Florida, and in the western U.S. The afternoon high of 94 degrees at Fort Myers FL was their tenth record high for the month. Highs of 98 degrees at Medford OR and 99 degrees at Fresno CA were records for the date, and the temperature at Borrego Springs CA soared to 108 degrees. (The National Weather Summary)

1989 - Thirteen cities reported record high temperatures for the date, as readings soared into the upper 80s and 90s from the Northern and Central High Plains Region to Minnesota. Bismarck ND reported a record high of 95 degrees, and the temperature reached 97 degrees at Broadus MT. Afternoon thunderstorms developing along a cold front produced wind gusts to 60 mph at Wendover UT. (The National Weather Summary) (Storm Data)

1992: The past month was the coldest September ever recorded in interior Alaska. Fairbanks averaged a frigid 31.7° which was 13.2° below normal and the first below freezing September ever. Beginning on the 9th and on every day for the rest of the month, a new record low was set for either low minimums or low maximums, or both. On this date, the city plunged to 3° to set a new all-time record low for September. Snowfall for the month totaled 24.4 inches which was more than three times the previous record for September.

2001: Phoenix, AZ had an average temperature for the month of 92.2°, the city's hottest September day on record. (Ref. Wilson Wx. History)

2003: Grand Rapids, Michigan: With a trace of snow hitting the ground, Grand Rapids records its earliest occurrence of measurable snowfall, beating the old mark by a week. (Ref. WxDoctor)

2004: Driven mostly by outbreaks from Hurricanes Frances and Ivan, 279 tornadoes were recorded for the month, by far the most tornadoes ever to occur in September in the U.S.
West Palm Beach, FL had its wettest month on record with 29.40 inches of rain. Hurricanes Frances and Jeanne contributed most to the total. (Ref. Wilson Wx. History)

2006: A rare F1 tornado struck North Berwick, ME, causing damage to roofs, windows. Damaged totaled $125,000.
(Ref. Wilson Wx. History) The first phase of the deluge focused on the Southeast, starting on September 26 (4.20 inches Macon, Georgia). September 27th Wilmington, North Carolina had 10.33 inches of rain. As the remains of Nicole tracked toward North Carolina on September 30, tropical downpours spread into the Northeast, On September 30, Baltimore, Maryland, reported its second wettest day on record, with 6.02 inches of rain. Two-day totals on October 1 reached 7.58 inches in Wilmington, Delaware, and exceeded five inches northward into western Massachusetts. Event totals exceeded 16 inches in eastern North Carolina, and over a foot of rain fell northward into the Chesapeake Bay region. Although widespread flooding occurred, drought conditions preceding the deluge mitigated the impacts. Today Portsmouth, Virginia storm spotter ID vpor002 measured 9.10 inches an all-time station daily rainfall record. [database to 1976] (Ref. Weatherwise U.S. Weather Highlights of 2010 page 9)
 

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Looking forward to the cool down no matter how short lived it will be.  Rainfall here for September was better than for most places.  Received 3.32" for the month.  That was mostly from the 2.15" that fell on 9/5, surprise over performer.  Rest of the month was scattered light events.  Hopefully October can deliver more widespread moderate to heavier totals but my expectations are low.

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30 minutes ago, MANDA said:

Looking forward to the cool down no matter how short lived it will be.  Rainfall here for September was better than for most places.  Received 3.32" for the month.  That was mostly from the 2.15" that fell on 9/5, surprise over performer.  Rest of the month was scattered light events.  Hopefully October can deliver more widespread moderate to heavier totals but my expectations are low.

I had 3.38" for the month. 

image.png

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1 hour ago, SACRUS said:

 

Rain Sep

 

JFK: 2.96
New Brnswck: 2.66
NYC: 2.76
LGA: 2.54
BLM: 2.09
TTN: 1.89
PHL: 1.79
EWR: 1.71
TEB: 1.65
ISP: 1.58

3.28” for the month here. About average 

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17 minutes ago, donsutherland1 said:

Newark has reached 80° for the 10th time during the second half of September. That is tied with September 1881 for the second most such days and just one short of the record of 11 days from 2017. 

We ran out of days in the month to break the record but we wouldn't have done it tomorrow anyways with temps much cooler on the way...........

 

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20 hours ago, Sundog said:

Two out of three months finished above normal using 1981-2010 normals. 

Under no circumstances would you call that quite cold. 

 

If 81-2010 is your standard we likely will never have a cold winter ever again.

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September is ending on an unseasonably warm note. Many parts of the region saw high temperatures in the 80s. Preliminary highs included:

Bridgeport: 81°
Islip: 82° (tied record set in 1986)
New York City-Central Park: 81°
New York City-JFK Airport: 81°
New York City-LaGuardia Airport: 80°
Newark: 83°
White Plains: 80°

The last time all seven locations saw 80° or above highs on September 30th was in 1986.  

The start of October will coincide with arrival of the coolest air mass so far this season, but temperatures will likely quickly moderate, rising to above normal levels within a few days.

High temperatures will reach only the middle 60s tomorrow and Thursday. New York City will see the low temperature bottom out in the lower 50s on Thursday morning. Outside the City, widespread 40s are likely with a few of the colder locations dipping into the 30s.

A rapid warmup will commence on Friday and a warm weekend lies ahead.

The guidance and historical experience following a second half September mean temperature of 70° or above suggest that October will be warmer than normal in the New York City area. The two most recent Octobers with a cooler than normal first half like 2025 and a second half with a mean temperature of 70° or above were: 2017 (October mean temperature: 64.1° and October 2019: October mean temperature 59.9°).

The ENSO Region 1+2 anomaly was -0.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around September 24. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.12°C and the ENSO Region 3.4 anomaly has averaged -0.42°C. La Niña conditions will likely develop during mid- or late-autumn.

The SOI was +3.63 today. 

The preliminary Arctic Oscillation (AO) was -0.436 today. 

 

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11 hours ago, bluewave said:

This was still the warmest last week of September for many across the region. 
 

Time Series Summary for SOMERSET AIRPORT, NJ
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 71.2 1
2 2011-09-30 70.3 0
3 2017-09-30 69.4 0
4 2010-09-30 69.3 0
5 2015-09-30 67.0 0
6 2007-09-30 66.8 0
7 2020-09-30 66.5 0
8 2024-09-30 66.1 0
- 2019-09-30 66.1 0
9 2004-09-30 65.0 0
10 2014-09-30 64.4 0


 

Time Series Summary for SUSSEX AIRPORT, NJ
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 69.4 1
2 2011-09-30 68.6 0
3 2010-09-30 66.9 0
4 2017-09-30 66.3 0
5 2020-09-30 65.1 0
6 2007-09-30 64.8 0
7 2024-09-30 64.5 0
8 2014-09-30 64.3 0
9 2015-09-30 63.5 0
10 2019-09-30 62.6

0


 

Time Series Summary for New Brunswick Area, NJ (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 73.2 1
2 2017-09-30 72.0 0
3 2011-09-30 71.8 0
4 1959-09-30 71.6 0
- 1920-09-30 71.6 0
5 2010-09-30 71.2 0
6 1945-09-30 71.0 0
7 1933-09-30 70.5 0
8 1923-09-30 69.9 0
9 1910-09-30 69.8 2
10 1970-09-30 69.5 0


 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ
Click column heading to sort ascending, click again to sort descending.
1 1881-09-30 77.5 0
2 2025-09-30 75.0 1
3 1959-09-30 73.3 0
4 2011-09-30 73.1 0
5 2010-09-30 72.6 0
6 1986-09-30 72.1 0
7 2017-09-30 72.0 0
8 1920-09-30 71.1 1
9 2007-09-30 70.5 0
10 2019-09-30 70.4 0
- 1968-09-30 70.4 0
- 1933-09-30 70.4 0


 

Time Series Summary for WESTCHESTER CO AP, NY
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 71.0 1
2 1959-09-30 70.9 0
3 2011-09-30 69.5 0
4 2017-09-30 69.1 0
5 1970-09-30 69.0 0
6 2010-09-30 68.7 0
7 2007-09-30 67.6 0
8 1986-09-30 66.9 0
9 1968-09-30 66.7 0
10 2020-09-30 66.6 0


 

Time Series Summary for JFK INTERNATIONAL AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 72.5 1
2 1959-09-30 72.4 0
3 2011-09-30 71.7 0
4 2010-09-30 71.6 0
5 2017-09-30 70.9 0
6 1986-09-30 69.8 0
7 1968-09-30 69.6 0
8 2007-09-30 69.2 0
9 2015-09-30 69.1 0
10 2020-09-30 68.9 0


 

Time Series Summary for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 74.5 1
2 1959-09-30 74.3 0
3 2007-09-30 73.8 0
4 2010-09-30 73.7 0
5 2011-09-30 72.1 0
6 2017-09-30 72.0 0
7 2020-09-30 71.9 0
8 1986-09-30 71.7 0
9 2019-09-30 71.4 0
10 1968-09-30 69.7 0
- 1945-09-30 69.7 0


 

Time Series Summary for ISLIP-LI MACARTHUR AP, NY
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 74.0 1
2 2010-09-30 71.1 0
3 2011-09-30 70.7 0
4 2017-09-30 69.6 0
5 2007-09-30 68.1 0
6 2020-09-30 68.0 0
- 1986-09-30 68.0 0
8 2015-09-30 66.9 0
9 1972-09-30 66.4 0
10 2019-09-30 66.3 0
11 2014-09-30 65.9 0


 

Time Series Summary for NEW HAVEN TWEED AP, CT
Click column heading to sort ascending, click again to sort descending.
1 2025-09-30 72.1 1
2 2011-09-30 71.5 0
3 2010-09-30 71.2 0
4 1970-09-30 70.4 2
5 1959-09-30 69.9 0
6 2020-09-30 69.1 0
7 2017-09-30 67.9 0
8 2019-09-30 67.0 0
- 2007-09-30 67.0 0
10 2024-09-30 66.1 0
11 2014-09-30 65.5 0

 

This is weird even without any extreme heat it's the warmest week-- because of the elevated mins? I'd expect at least one or more heatwaves have occurred in the history of NYC in the last week of September.  

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12 minutes ago, LibertyBell said:

This is weird even without any extreme heat it's the warmest week-- because of the elevated mins? I'd expect at least one or more heatwaves have occurred in the history of NYC in the last week of September.  

The latest heatwave on record for Central Park is September 21-23, 1895 and 1914. Newark's is September 23-25, 2017.

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8 hours ago, SACRUS said:


 

Records:

Highs:

EWR: 89 (1986)
NYC: 89 (1986)
LGA: 88 (1988)
JFK: 84 (1986)


Lows:

EWR: 38 (1942)
NYC: 39 (1912)
LGA: 43 (1947)
JFK: 43 (1991)

Historical:

1875: What weather observers “observe” has changed with time. Among the remarks noted by the Lynchburg, VA observer, was today’s migration of hundreds of squirrels across the James River. (Ref. Weather Guide Calendar with Phenomenal Weather Events 2011 Accord Pub. 2010, USA)

1892: Central Park in New York City, NY concluded its wettest month ever with 16.85 inches of rain. (Ref. Wilson Wx. History)

1896 - A hurricane formed on September 22 and lasted until September 30. It formed directly over the Lesser Antilles and hit Cuba, Florida, Georgia, South and North Carolina, Virginia, Washington D.C., and Pennsylvania. Its maximum sustained winds were at 130 mph. The heaviest rainfall deposited in association with the storm was 19.96 inches at Glennville, Georgia. This hurricane was responsible for an estimated 130 deaths and $1.5 million in damage (1896 dollars).

1896: A hurricane moving through the Caribbean Sea and the Gulf of Mexico. The system then tracked inland through the Southeast to the west of Washington, DC. Richmond suffered severely from the cyclone. Communication was gone early on during the storm the only line that remained open belonged to Western Union, the wire than ran to Wilmington, NC. The steeple of the Second Baptist church yielded to the storm, falling across main street. The Governor's Mansion survived the cyclone reasonably well. Damage totaled $150,000 at the state capital. In Petersburg the Imperial Hotel was unroofed. Smaller buildings experienced great damage. Fredericksburg saw its St. George's church steeple injured by the cyclone. In Alexandria the Third Baptist Colored church was razed to the ground ($5000). Over forty windmills were wrecked at Falls Church. Manassas saw its Evangelical Lutheran church blown six inches off its foundation. It was one of the worst storms on record in the District of Columbia as five-minute sustained winds peaked at 66 mph and gusts reached 80 mph; the pressures fell to 29.14" around 11 p.m.. At 10:30 p.m., the steeple to the New York Avenue Presbyterian Church crashed to the ground. A five story brick building was demolished, injuring the adjoining buildings, trapping five men under debris. Many buildings were unroofed. Capitol Hill saw even greater damage. Georgetown experienced its worst storm ever. A few panes of glass at the White House were shattered as well. Winds began to subside by 12:55 a.m.. In all, a $390,000 in damage was incurred. A flash flood at Staunton, along Lewis Creek, overran its banks, killing five. Seven inches of rain on the 30th swelled a large lake near the town, bursting its dam at 10 p.m.. Alarms were sounded as torrents of water rushed down Central Avenue, submerging everything in its path. Twenty-five houses were moved from their foundations before crumbling in the angry waters ($500,000). On the 1st, the and Chesapeake & Ohio Canal merged into one as flood waters increased their height and breadth.
(Ref. for 1896 Fall Storm)

1924: Norfolk saw winds reach 76 mph sustained from a cyclone that became nontropical over the Southeast U.S.. In Fauquier county, four inches of rain fell at Leads Manor on the 29th. In Richmond county, 4.60" of rain fell at Warsaw on the 30th. Richmond, VA recorded 2.19 inches of rain on the 29th and 2.85 inches on the 30th for a total of 5.04 inches. Leeds Manor (4.00"), Stuart (4.20"), Urbanna (3.80"), and Winchester (2.05") all set 24-hour rainfall records for September during this tempest. East Coast Rain Storm

1932: Southern California: Tropical cyclone rainfall of 4.38 inches at Tehachapi in 7 hours causes flash floods on Auga Caliente and Tehachapi Creeks resulting in 15 deaths. (Ref. WxDoctor)

1934: DCA had the wettest September on record 17.45 inches at 24th and M street in Washington, DC. (Ref. Washington Weather Records - KDCA)

1943: A tropical storm that formed southwest of Bermuda moved to the northwest and into the Delmarva Peninsula overnight October 1 then dissipated in extreme northeastern Maryland as a depression. Atlantic City, NJ measured a gust to 78 mph and Cape Henry, VA gusted to 72 mph. (Ref. Wilson Wx. History)

1959 - Three tornadoes spawned by the remnants of Hurricane Gracie killed 12 persons at Ivy VA. (The Weather Channel)

1961: An early season snowfall occurred over the Northern Plains with the greatest total of 4 inches falling in the New Ulm- Mankato area in Minnesota. Austin, MN had their earliest measurable snowfall with half an inch. Omaha, NE had its first September snow in 70 years. (Ref. AccWeather Weather History)

1970: A nineteen-month drought in southern California came to a climax. The drought, that made brush and buildings tinder dry, set up the worst fire conditions in California history as hot Santa Anna winds sent the temperature soaring to 105 degrees at Los Angeles, and to 97 degrees at San Diego. During that last week of September whole communities of interior San Diego County were consumed by fire. Half a million acres were burned, and the fires caused fifty million dollars damage. (David Ludlum)

1970 - A nineteen month drought in southern California came to a climax. The drought, which made brush and buildings tinder dry, set up the worst fire conditions in California history as hot Santa Anna winds sent the temperature soaring to 105 degrees at Los Angeles, and to 97 degrees at San Diego. During that last week of September whole communities of interior San Diego County were consumed by fire. Half a million acres were burned, and the fires caused fifty million dollars damage. (David Ludlum)

1977 - The temperature at Wichita Falls, TX, soared to 108 degrees to establish a record for September. (The Weather Channel)

1979: This was the eighth day of 29 consecutive days when no measurable rain fell at Chicago, IL. The only measurable rain for the month came on the 1st with 0.01 inches. This was their driest September on record. Rockford, IL only received 0.05 inches of rain; their driest month ever. (Ref. Wilson Wx. History)

1985: An early season snowstorm covered much of the Arrowhead Region of Minnesota with 7 to 9 inches of snow. Some snow depths reported for the event, which ended the next day, were 7 inches at Babbitt and Aurora, 7.5 inches at Isabella, and 8.5 inches at Poplar Lake. (Ref. AccWeather Weather History)

1986 - Thunderstorms, which had inundated northern sections of Oklahoma with heavy rain, temporarily shifted southward producing 4 to 8 inches rains from Shawnee to Stilwell. Baseball size hail and 80 mph winds ripped through parts of southeast Oklahoma City, and thunderstorm winds caused more than half a million dollars damage at Shawnee. (Storm Data)

1987 - Afternoon thunderstorms in Michigan produced hail an inch in diameter at Pinckney, and wind gusts to 68 mph at Wyandotte. A thunderstorm in northern Indiana produced wet snow at South Bend. Seven cities in the northwestern U.S. reported record high temperatures for the date, including readings of 98 degrees at Medford OR and 101 degrees at downtown Sacramento CA. (The National Weather Summary) (Storm Data)

1988 - Unseasonably warm weather prevailed over Florida, and in the western U.S. The afternoon high of 94 degrees at Fort Myers FL was their tenth record high for the month. Highs of 98 degrees at Medford OR and 99 degrees at Fresno CA were records for the date, and the temperature at Borrego Springs CA soared to 108 degrees. (The National Weather Summary)

1989 - Thirteen cities reported record high temperatures for the date, as readings soared into the upper 80s and 90s from the Northern and Central High Plains Region to Minnesota. Bismarck ND reported a record high of 95 degrees, and the temperature reached 97 degrees at Broadus MT. Afternoon thunderstorms developing along a cold front produced wind gusts to 60 mph at Wendover UT. (The National Weather Summary) (Storm Data)

1992: The past month was the coldest September ever recorded in interior Alaska. Fairbanks averaged a frigid 31.7° which was 13.2° below normal and the first below freezing September ever. Beginning on the 9th and on every day for the rest of the month, a new record low was set for either low minimums or low maximums, or both. On this date, the city plunged to 3° to set a new all-time record low for September. Snowfall for the month totaled 24.4 inches which was more than three times the previous record for September.

2001: Phoenix, AZ had an average temperature for the month of 92.2°, the city's hottest September day on record. (Ref. Wilson Wx. History)

2003: Grand Rapids, Michigan: With a trace of snow hitting the ground, Grand Rapids records its earliest occurrence of measurable snowfall, beating the old mark by a week. (Ref. WxDoctor)

2004: Driven mostly by outbreaks from Hurricanes Frances and Ivan, 279 tornadoes were recorded for the month, by far the most tornadoes ever to occur in September in the U.S.
West Palm Beach, FL had its wettest month on record with 29.40 inches of rain. Hurricanes Frances and Jeanne contributed most to the total. (Ref. Wilson Wx. History)

2006: A rare F1 tornado struck North Berwick, ME, causing damage to roofs, windows. Damaged totaled $125,000.
(Ref. Wilson Wx. History) The first phase of the deluge focused on the Southeast, starting on September 26 (4.20 inches Macon, Georgia). September 27th Wilmington, North Carolina had 10.33 inches of rain. As the remains of Nicole tracked toward North Carolina on September 30, tropical downpours spread into the Northeast, On September 30, Baltimore, Maryland, reported its second wettest day on record, with 6.02 inches of rain. Two-day totals on October 1 reached 7.58 inches in Wilmington, Delaware, and exceeded five inches northward into western Massachusetts. Event totals exceeded 16 inches in eastern North Carolina, and over a foot of rain fell northward into the Chesapeake Bay region. Although widespread flooding occurred, drought conditions preceding the deluge mitigated the impacts. Today Portsmouth, Virginia storm spotter ID vpor002 measured 9.10 inches an all-time station daily rainfall record. [database to 1976] (Ref. Weatherwise U.S. Weather Highlights of 2010 page 9)
 

1892: Central Park in New York City, NY concluded its wettest month ever with 16.85 inches of rain. (Ref. Wilson Wx. History)

what caused so much rain Tony?

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5 minutes ago, LibertyBell said:

I thought it would be the one in 1895 when NYC had 3 straight days of 95+, was that 20-22 Don?

 

I thought I had included the 1895 but typed too fast. The 1914 heatwave tied the 1895 one for the latest on record at Central Park.

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The 88 _ 90 _ 94 of Oct 4 to 6 1941 was the latest not quite a heatwave by official definitions, and mid-October 1954 had three in a row over 84 F. 

The wet September is a typo, it was actually 1882. And what caused it was mainly a slow-moving tropical storm (TS 4 of 1892) moving up the east coast 22nd to 24th. About three quarters of the month's massive total occurred in that time frame. The TS crossed Long Island with a landfall at Mastic Beach.  

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41 minutes ago, Roger Smith said:

The 88 _ 90 _ 94 of Oct 4 to 6 1941 was the latest not quite a heatwave by official definitions, and mid-October 1954 had three in a row over 84 F. 

The wet September is a typo, it was actually 1882. And what caused it was mainly a slow-moving tropical storm (TS 4 of 1892) moving up the east coast 22nd to 24th. About three quarters of the month's massive total occurred in that time frame. The TS crossed Long Island with a landfall at Mastic Beach.  

Thanks

 

September 1882 New York City Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
81 69 0.07 0.0
85 70 0.00 0.0
80 72 0.00 0.0
82 72 0.64 0.0
79 68 0.00 0.0
76 65 0.00 0.0
79 63 0.00 0.0
82 66 0.00 0.0
73 63 0.16 0.0
68 62 0.00 0.0
67 59 2.57 0.0
70 57 0.66 0.0
69 53 0.00 0.0
77 64 0.09 0.0
73 63 0.00 0.0
76 58 0.00 0.0
74 60 0.00 0.0
80 65 0.00 0.0
87 69 0.00 0.0
84 72 0.29 0.0
72 62 1.21 0.0
72 62 2.34 0.0
66 55 8.28 0.0
69 55 0.02 0.0
62 55 0.04 0.0
63 56 0.05 0.0
62 51 0.00 0.0
55 48 0.16 0.0
60 48 0.27 0.0
68 50 0.00 0.0
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In Sept 1882 as indicated the massive rainfalls 22nd-23rd were in advance of landfalling TS4, and the 2.57" on the 11th was due to passage of Hurricane Two (by then only a TS) across the Delmarva Peninsula after a landfall near Mobile (Navarre FL) on the night of 10th-11th. Between those, TS3 of 1892 was a weaker event that moved into TX around the 16th. 

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