2026-2027 Record-breaking El Nino

[40/70 Benchmark]

1 hour ago, GaWx said:

 This is not only the coldest CFSv2 forecast for JFM made in summer for the SE US to C Plains part of the U.S. in El Niño, it is by a good margin THE coldest JFM forecast for this area that I could find made from any season and in any ENSO back to the start of the CFSv2 in 2012! This is extreme, folks!

That doesn't look like prohibitive warmth in SNE, either....like 2004-2005 warmth probably. ... +1-+3F. Give me that all day long if it comes with tons of moisture....I'll take that over last year in a heartbeat. 

2004-2005 was slightly above average in terms of temps, but only 1995 and 2014 saw higher total seasonal snowfall IMBY.

[40/70 Benchmark]

1 hour ago, GaWx said:

 This is not only the coldest CFSv2 forecast for JFM made in summer for the SE US to C Plains part of the U.S. in El Niño, it is by a good margin THE coldest JFM forecast for this area that I could find made from any season and in any ENSO back to the start of the CFSv2 in 2012! This is extreme, folks!

That CFS plot looks like 2009-2010 IMO.

[bluewave]

12 hours ago, bncho said:

Not to be a downer or anything but is it possible/likely that the models that show the favorable Feb/Mar pattern are just falling back on what a normal El Niño would generally do? This is not a normal El Niño. I think @bluewave has touched on this in seasons past about how seasonal models are susceptible to this? Just worried for something like Feb 2024 to happen.

Seasonal model forecasts for super El Niños usually have warmer temperatures across Canada and the Northern tier states into the Northeast. So in that general sense they usually end up correct. But they haven’t been correct with the magnitude of the warmth.

Spots that wound up with +10 or more months have only been forecast to be something like +1 to 3 or maybe +2 to +4. Plus each of the 3 super El Niños since the late 90s had other variations in regard to where the ridge axis was located vs forecast.

1997-1998 was our only east based event of that era with a strong +PDO and no Maritime Continent forcing. But it started out cooler in the East during December and got progressively warmer during January and February. So it didn’t follow the general El Niño progression. It also had a strong -AO in January that linked up with the Southeast ridge even with such a strong STJ.

The models had the stock El Niño composite for December 2015 as late as November 2023 with warmer north and cooler south. We wound up with the warmest December on record in the East greater than +13 in spots which were forecast to be something like +1 to +3. Strong +PDO that winter and a Maritime Cintinent influence in December

2023-2024 was forecast to be only something like +1 to 3 for places  which verified more than +10. The event  had a -PDO with Maritime Continent influence.

This event is stronger than all three of those events. So the models probably won’t start showing the actual December pattern until into the first week of December. The January pattern probably won’t begin to show up until closer to New Years. And the actual February pattern until that month starts also.

 

 

 

 

[mitchnick]

5 hours ago, GaWx said:

 This is not only the coldest CFSv2 forecast for JFM made in summer for the SE US to C Plains part of the U.S. in El Niño, it is by a good margin THE coldest JFM forecast for this area that I could find made from any season and in any ENSO back to the start of the CFSv2 in 2012! This is extreme, folks!

Glad you posted it and not me! Lol

[mitchnick]

6 hours ago, GaWx said:

 This is not only the coldest CFSv2 forecast for JFM made in summer for the SE US to C Plains part of the U.S. in El Niño, it is by a good margin THE coldest JFM forecast for this area that I could find made from any season and in any ENSO back to the start of the CFSv2 in 2012! This is extreme, folks!

Looking at the Cfs2 past March, it warms up North America pretty fast getting you to this early forecast for May. So the relative extreme heat from this Niño does get distributed thru the conus/planet, but not until late spring into summer and beyond. Just a thought.

[GaWx]

 Yesterday’s NOAA weekly release for relative 3.4 came in at +1.8, which is the warmest early August on record back to 1982:
 

29JUL2026         3.2        2.1        1.5        0.2

05AUG2026        3.3        2.4        1.8        0.3

 ————————

How does this compare to 1997?

06AUG1997         3.9        2.3        1.6        0.3

——————

How does this +1.8 for 3.4 compare to others for weeks centered near August 5th?

2026 +1.8

2023 +0.4

2015 +1.1

2012 +0.7

2009 +0.4

2006 +0.2

2004 +0.7

2002 +0.7

1997 +1.6

1994 +0.8

1993 +0.4

1991  +0.7

1990 +0.4

1987 +1.2

1986 +0.3

1982 +1.0

 

 The earliest any of these reached +1.8 is August 20, 1997.