September 2025 OBS-Discussion centered NYC subforum

[LibertyBell]

1 hour ago, steve392 said:

52 degree's in Mahwah this morning. Crystal clear skies

windy too but gorgeous but brrrrrrrrrrr lol

[anthonymm]

17 minutes ago, Stormlover74 said:

I can't really think of many storms in the final week of March while early April has produced a few. Very small sample size though. 1982 and 2003 probably skewing the results

What do you think climatologically the snowiest week is? Second week of Feb would be my gut feeling.

[Stormlover74]

6 minutes ago, anthonymm said:

What do you think climatologically the snowiest week is? Second week of Feb would be my gut feeling.

That or 3rd week of Jan

[donsutherland1]

50 minutes ago, anthonymm said:

What do you think climatologically the snowiest week is? Second week of Feb would be my gut feeling.

 

44 minutes ago, Stormlover74 said:

That or 3rd week of Jan

It depends on the timeframe one is using and how one defines snowiest week.

Select data for Central Park:

Snowiest Week (Based on Mean Daily Snowfall):
1869-2024: February 7-13: 0.4" per day
1991-2020: January 21-27: 0.6" per day

Snowiest Week (Based on the Percentage of Days with Measurable Snowfall):
1869-2024: January 27-February 2: 16.1%
1991-2020: January 25-31: 15.7%

Snowiest Week (Based on the Percentage of Days with 1" or More Snowfall):
1869-2024: February 1-7: 9.0%
1991-2020: January 21-27: 10.5%

[LibertyBell]

23 minutes ago, donsutherland1 said:

 

It depends on the timeframe one is using and how one defines snowiest week.

Select data for Central Park:

Snowiest Week (Based on Mean Daily Snowfall):
1869-2024: February 7-13: 0.4" per day
1991-2020: January 21-27: 0.6" per day

Snowiest Week (Based on the Percentage of Days with Measurable Snowfall):
1869-2024: January 27-February 2: 16.1%
1991-2020: January 25-31: 15.7%

Snowiest Week (Based on the Percentage of Days with 1" or More Snowfall):
1869-2024: February 1-7: 9.0%
1991-2020: January 21-27: 10.5%

what about for HECS Don (this I would define as a day with 10" or more of snowfall.)

[donsutherland1]

41 minutes ago, LibertyBell said:

what about for HECS Don (this I would define as a day with 10" or more of snowfall.)

Highest Percentage of Days with 10" or More Snowfall):
1869-2024: February 4-10: 0.8% of days
1991-2020: January 20-26: 1.4% of days

[LibertyBell]

3 hours ago, donsutherland1 said:

Highest Percentage of Days with 10" or More Snowfall):
1869-2024: February 4-10: 0.8% of days
1991-2020: January 20-26: 1.4% of days

Interesting, everything is shifting to January as February has been getting warmer at a more rapid rate.

[Roger Smith]

LB, I think that TS4 was about a 60 mph storm when it made landfall. The rainfall you asked about (8.28") is the daily record for September (second place being 7.13" Sep 1, 2021)  and is also the all-time daily record for any month, but the all-time monthly record at Central Park (despite what it said in the source) is August 2011 with 18.95" -- Oct 2005 had 16.73" April 1983 14.01" and Oct 1903 had 13.31" ... these are the largest daily totals ...

1. Sep 23, 1882 ____ 8.28"   

2. Apr 15, 2007 ____ 7.57"

3. Nov 8, 1977 _____ 7.40"

4, Oct 9, 1903 _____ 7.33" 

5. Sep 1, 2021 _____ 7.13

6. Aug 14, 2011 ___ 5.81"

7. Nov 8, 1972 _____ 5.60"

8. Sep 21, 1966 ___ 5.54"

9. Sep 29, 2023 __ 5.48"

10. Sep 16, 1999 __ 5.02"

10. Oct 1, 1913 ____ 4.98"

11. Apr 30, 2014 ___4.97"

12. Sep 8, 1934 ___ 4.86"

13t Aug 20, 1873 __ 4.80"

13t Aug 16, 1909 ___4.80"

15. Aug 10, 1990 ___4.64"

16. Aug 21, 2021 ___4.45"  

17. Oct 19, 1996 ____4.35"

18. Apr 10, 1983 ___ 4.31"

19t Sep 19, 1894 ___ 4.30"

19t Oct 8, 1903 ____ 4.30"

21. June 26, 1884 __4.29"

22t Oct 8, 2005 ____ 4.26"

22t Oct 12, 2005 ___ 4.26"

24. Mar 25, 1876 ___4.25"

25. Aug 21, 1888 ___4.19"

26t June 7, 2013 ___4.16"

26t Aug 27, 1971 ___ 4.16"

26t Sep 15, 1933 ___ 4.16"

29. Aug 9, 1942 ___ 4.10"

30. Oct 7, 1972 _____ 4.09"

31. Sep 21, 1938 ___ 4.05"

 

This includes all 4"daily amounts, May's record daily in 32nd place was 3.99" on 29th, 1968.

Sep 13-14 1944 (3.94 + 3.82) both came close to making the list also.