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October 2026 general discussion


Typhoon Tip
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3 hours ago, WxWatcher007 said:

Uh oh. October snow. Winter canceled? :lol: 
 

A little skeptical, but it’s still an area climatologically favored. Euro legacy has it too now. Ensembles don’t really bring it up here though.

 
 There’s a strong correlation between very strong El Niños and having one significant to historic U.S. E coast storm in Oct as ALL 9 of the other very strong El Niño Octobers had one:

-1877: Hatteras had 1002 mb on 10/27 along with significant rainfall and strong NE winds caused by gradient between a sub 1000 mb low offshore and a 1022 mb high over Quebec. Norfolk got 2.71” of rain. The low was TS #7 then to the S moving OTS:
tracks-at-1877.png


-1888: TS #7 went up the coast 10/11-12:
tracks-at-1888.png

-1957: a strong nor’easter (995 mb) went up the coast 10/5-6 giving Hatteras 4.62” of rain:

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1957/19571006.pdf



-1965: TS # 9 formed 10/16 NW Bahamas and hit NE FL 10/19 producing 8.3” on rain at CHS:
tracks-at-1965.png

-1972: very strong nor’easter went up coast NC-NE 10/5-8 with strong winds and heavy rains (>4” NYC, nearly 4” Hatteras):

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1972/19721002-19721008.pdf



-1982: strong winds/heavy rain (3.64” of rain Hatteras) from nor’easter 10/23-26 due to strong gradient between 1004 mb low Hatteras and 1030 mb high NE US. I experienced this in DC and still clearly recall the unusual combo of continuous rain, wind, and cold:

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1982/19821018-19821024.pdf


https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1982/19821025-19821031.pdf



1991: “Perfect Storm” 10/30-11/1 H #8 (Boston 2.69” of rain):
tracks-at-1991.png

1997: nor’easter 10/18-20 (Hatteras 1.4” of rain):

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1997/19971013-19971019.pdf

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1997/19971020-19971026.pdf

2015: strong front pushed by 1045 mb SE Canadian high gets hung up along E coast with ~stationary upper low SE US and MH Joaquin ~stationary Bahamas interacting in a way few have ever seen resulting in >17”/historic flooding CHS Oct 1-4:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_stnplot_20151002.html

tracks-at-2015.png

 So, all 9 very strong El Niño had one impactful to historic US E coast storm in Oct! Are the 12Z UKMET, Euro, Euro-AIFS, and Icon sniffing out something real for 2026’s turn? Based on the history noted above, I wouldn’t at this point discount at least the possibility of something notable happening near the E coast next week.

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4 hours ago, GaWx said:

 
 There’s a strong correlation between very strong El Niños and having one significant to historic U.S. E coast storm in Oct as ALL 9 of the other very strong El Niño Octobers had one:

-1877: Hatteras had 1002 mb on 10/27 along with significant rainfall and strong NE winds caused by gradient between a sub 1000 mb low offshore and a 1022 mb high over Quebec. Norfolk got 2.71” of rain. The low was TS #7 then to the S moving OTS:
tracks-at-1877.png


-1888: TS #7 went up the coast 10/11-12:
tracks-at-1888.png

-1957: a strong nor’easter (995 mb) went up the coast 10/5-6 giving Hatteras 4.62” of rain:

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1957/19571006.pdf



-1965: TS # 9 formed 10/16 NW Bahamas and hit NE FL 10/19 producing 8.3” on rain at CHS:
tracks-at-1965.png

-1972: very strong nor’easter went up coast NC-NE 10/5-8 with strong winds and heavy rains (>4” NYC, nearly 4” Hatteras):

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1972/19721002-19721008.pdf



-1982: strong winds/heavy rain (3.64” of rain Hatteras) from nor’easter 10/23-26 due to strong gradient between 1004 mb low Hatteras and 1030 mb high NE US. I experienced this in DC and still clearly recall the unusual combo of continuous rain, wind, and cold:

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1982/19821018-19821024.pdf


https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1982/19821025-19821031.pdf



1991: “Perfect Storm” 10/30-11/1 H #8 (Boston 2.69” of rain):
tracks-at-1991.png

1997: nor’easter 10/18-20 (Hatteras 1.4” of rain):

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1997/19971013-19971019.pdf

https://library.oarcloud.noaa.gov/docs.lib/htdocs/rescue/dwm/1997/19971020-19971026.pdf

2015: strong front pushed by 1045 mb SE Canadian high gets hung up along E coast with ~stationary upper low SE US and MH Joaquin ~stationary Bahamas interacting in a way few have ever seen resulting in >17”/historic flooding CHS Oct 1-4:

https://www.wpc.ncep.noaa.gov/dailywxmap/dwm_stnplot_20151002.html

tracks-at-2015.png

 So, all 9 very strong El Niño had one impactful to historic US E coast storm in Oct! Are the 12Z UKMET, Euro, Euro-AIFS, and Icon sniffing out something real for 2026’s turn? Based on the history noted above, I wouldn’t at this point discount at least the possibility of something notable happening near the E coast next week.

You may have already observed that correlation

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1 hour ago, Typhoon Tip said:

You may have already observed that correlation

John, thanks.

 Are you referring to the late Sept of ‘26 nor’easter? If so, I was just counting ones in October though I realize it was within a week of Oct and thus very likely largely connected to the very strong Nino. But I didn’t check Sept for any of those 9 analogs.

 So, if we count that one, does that reduce the chance for a 2nd E coast storm later this month? I never found two really notable E coast storms for any of the 9 analog years in Oct, itself. I suspect that may be more than just randomness. Maybe one strong E coast storm late Sept/Oct is enough to sort of calm down the atmosphere and prevent a 2nd one? What do you think? If so and if we count the late Sep nor’easter, maybe that would reduce the chance for another for the rest of Oct?

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