September 2023

[Rjay]

7 minutes ago, forkyfork said:

so the park was almost three degrees cooler than the heliport on a monthly average? lol

Montauk was warmer than the park lol

[SACRUS]

 

59 / 58 continued 8 of 10 days if clouds and 3.01 inches from this event (luckily was just SW of the worst flooding)   12 more hours of the dingy grey and mist.  Sun (10/1)  starts feeling like we are in a warm pattern/ridging and out of the coold/rainy "oasis". Still some NNE flow through the week but very warm air all around against averages.  80s for the warm spots (park may stay 5 - 8 degrees below other sites with the growth).    Peak warmth Wed - Thu (10/4).   

Trough into the GL/MW by the end of the week with front approaching Sat (10/6).   Cooler period 10/ 8 - 10/11 looks like frost in the mountains/NW section as currently projected.    Ridge into the NW pushes east by mud month and warmer one the other end of the middle 10/16 or so.  We'll see how dry the 10/1 - 10/15 period can remain - tendency is for hung up fronts and it wants to rain here.

 

 

 

 

[forkyfork]

39 minutes ago, Rjay said:

Montauk was warmer than the park lol

but newark!!!

[bluewave]

NYC is the new Riverhead.

 

Data for September 1, 2023 through September 30, 2023
Click column heading to sort ascending, click again to sort descending.

State	Name	Station Type	Mean Avg Temperature
NY	PORT AUTH DOWNTN MANHATTAN WALL ST HEL	ICAO	72.4
NJ	NEWARK LIBERTY INTL AP	WBAN	71.4
NY	LAGUARDIA AIRPORT	WBAN	71.3
NY	MONTAUK AIRPORT	WBAN	70.5
NY	WORLD TRADE CENTER	WBAN	70.4
NY	MOUNT SINAI	COOP	70.2
NY	FARMINGDALE REPUBLIC AP	WBAN	70.1
NY	NY CITY CENTRAL PARK	WBAN	69.7
NY	RIVERHEAD RESEARCH FARM	COOP	69.7
NY	JFK INTERNATIONAL AIRPORT	WBAN	69.6
CT	NEW HAVEN TWEED AP	WBAN	69.5

[SACRUS]

Records:

 

Highs:

 

EWR: 89 (1986)
NYC: 89 (1986)
LGA: 88 (1986)


Lows:

EWR: 38 (1942)
NYC: 39 (2012)
LGA: 43 (1947)

Historical:

 

 

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).

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

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)

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.

[SACRUS]

1 minute ago, bluewave said:

NYC is the new Riverhead.

 

Data for September 1, 2023 through September 30, 2023
Click column heading to sort ascending, click again to sort descending.

State	Name	Station Type	Mean Avg Temperature
NY	PORT AUTH DOWNTN MANHATTAN WALL ST HEL	ICAO	72.4
NJ	NEWARK LIBERTY INTL AP	WBAN	71.4
NY	LAGUARDIA AIRPORT	WBAN	71.3
NY	MONTAUK AIRPORT	WBAN	70.5
NY	WORLD TRADE CENTER	WBAN	70.4
NY	MOUNT SINAI	COOP	70.2
NY	FARMINGDALE REPUBLIC AP	WBAN	70.1
NY	NY CITY CENTRAL PARK	WBAN	69.7
NY	RIVERHEAD RESEARCH FARM	COOP	69.7
NY	JFK INTERNATIONAL AIRPORT	WBAN	69.6
CT	NEW HAVEN TWEED AP	WBAN	69.5

 

It'll be interesting to see high differences between NYC (park) and EWR/New Brnswck/ LGA etc Mon - Wed this week.

[Stormlover74]

Feels warm and muggy out

[SACRUS]

 

Sun coming out now.  68  / 60 

[Roger Smith]

14.25" Sep 2023 total (plus any later today) would be 2nd wettest Sep (1882 _ 16.85") and fourth wettest month overall.

(Aug 2011 _ 18.95" ranks first, Sep 1882 _16.85" ranks 2nd, Oct 2005 _16.73" ranks 3rd). (NYC)

[IrishRob17]

Another double digit rainfall month here with 10.52” in September, July had 13.95”. 

[donsutherland1]

September is concluding with a mean temperature of 69.4° in New York City. That is 0.2° above normal.

A spell of warmer than normal weather lies ahead for much of the first week of October. Temperatures could reach 80° or above on several days next week.

However, this warmth will be minor compared to the record-breaking heat that will start October in parts of the Plains States and Midwest. Today, Macomb, IL reached 98°. The previous latest-season 90° reading occurred on September 4, 1906. Moreover, that tied the September monthly record.

There remain indications that colder air could push into the East near the start of the second week of October or just afterward, possibly preceded by yet another storm.

The ENSO Region 1+2 anomaly was +2.8°C and the Region 3.4 anomaly was +1.7°C for the week centered around September 20. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +2.98°C and the ENSO Region 3.4 anomaly has averaged +1.55°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 -7.19 today.

The preliminary Arctic Oscillation (AO) was +0.219 today.

 

[doncat]

September finished here with a +0.9° temp departure...the first ten days were about +7°, so we made up a lot the last couple weeks. Rainfall of 9.75" which is my 3rd wettest in 42 years.

[bluewave]

Top 10 warmest September at ISP and EWR. The 91-20 climate normals have warmed so much, that it only takes a +1.7 at ISP for the 7th warmest September temperature. 

 

Time Series Summary for ISLIP-LI MACARTHUR AP, NY - Month of Sep
Click column heading to sort ascending, click again to sort descending.

Rank	Year	Mean Avg Temperature	Missing Count
1	2015	70.9	0
2	2005	70.2	0
3	2018	69.8	0
4	2021	69.6	0
-	1980	69.6	0
5	2017	69.0	0
-	2011	69.0	0
6	2016	68.9	0
7	2023	68.6	0
-	1998	68.6	0
8	2010	68.3	0
9	2022	68.2	0
10	1983	68.1	0
-	1971	68.1	0

 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Sep
Click column heading to sort ascending, click again to sort descending.

Rank	Year	Mean Avg Temperature	Missing Count
1	1961	74.5	0
2	2005	73.5	0
3	2015	73.4	0
4	2021	72.5	0
5	2016	71.8	0
-	1971	71.8	0
6	2010	71.6	0
7	1959	71.5	0
8	2018	71.4	0
9	2023	71.2	0
-	2011	71.2	0
10	1973	71.0	0
-	1931	71.0	0

[MANDA]

Rainfall at my location for September:  7.50".  That pales in comparison to other locations in the sub forum.

Y.T.D.: 47.68"

[BucksCO_PA]

On 10/1/2023 at 6:56 AM, bluewave said:

Top 10 warmest September at ISP and EWR. The 91-20 climate normals have warmed so much, that it only takes a +1.7 at ISP for the 7th warmest September temperature. 

 

Time Series Summary for ISLIP-LI MACARTHUR AP, NY - Month of Sep
Click column heading to sort ascending, click again to sort descending.

Rank	Year	Mean Avg Temperature	Missing Count
1	2015	70.9	0
2	2005	70.2	0
3	2018	69.8	0
4	2021	69.6	0
-	1980	69.6	0
5	2017	69.0	0
-	2011	69.0	0
6	2016	68.9	0
7	2023	68.6	0
-	1998	68.6	0
8	2010	68.3	0
9	2022	68.2	0
10	1983	68.1	0
-	1971	68.1	0

 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ - Month of Sep
Click column heading to sort ascending, click again to sort descending.

Rank	Year	Mean Avg Temperature	Missing Count
1	1961	74.5	0
2	2005	73.5	0
3	2015	73.4	0
4	2021	72.5	0
5	2016	71.8	0
-	1971	71.8	0
6	2010	71.6	0
7	1959	71.5	0
8	2018	71.4	0
9	2023	71.2	0
-	2011	71.2	0
10	1973	71.0	0
-	1931	71.0	0

LOL, That's because Islip only has a 61 yr period of record. 94 years shorter than Central Park. 

Rinse, wash, repeat.....next thing you know you'll be posting temp obs for a helicopter pad.

[bluewave]

14 minutes ago, BucksCO_PA said:

LOL, That's because Islip only has a 61 yr period of record. 94 years shorter than Central Park. 

Rinse, wash, repeat.....next thing you know you'll be posting temp obs for a helicopter pad.

It’s because they are measuring the high temperatures now in NYC underneath trees. The thermometer was out in the open before the 90s. So this invalidates comparisons to NYC high temperatures before the change in observation methodology. Just add a few degrees to the NYC high temperatures and they would have as many top 10 warmest finishes as the other sites do. Even the new WTC station right on NY Harbor with local sea breezes finished the month above 70°.

https://facilityexecutive.com/world-trade-center-weather-station-offers-insights-for-facilities/

Monthly Data for September 2023 for Upton NY NWS CWA
Click column heading to sort ascending, click again to sort descending.

State	Name	Station Type	Mean Avg Temperature
NY	PORT AUTH DOWNTN MANHATTAN WALL ST HEL	ICAO	71.7
NJ	NEWARK LIBERTY INTL AP	WBAN	71.2
NY	LAGUARDIA AIRPORT	WBAN	71.0
NY	WORLD TRADE CENTER	WBAN	70.4
NY	MOUNT SINAI	COOP	70.2
NY	MONTAUK AIRPORT	WBAN	69.9
NY	FARMINGDALE REPUBLIC AP	WBAN	69.8
NY	MOLLOY CERCOM	COOP	69.5
NY	NY CITY CENTRAL PARK	WBAN	69.4
NY	JFK INTERNATIONAL AIRPORT	WBAN	69.4
NY	RIVERHEAD RESEARCH FARM	COOP	69.4