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Spring ‘25 Severe Banter


largetornado
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2 hours ago, CheeselandSkies said:

Interesting. A lot of the analogs being pulled by the various TwXers I'm seeing are among the worst springs for chasing in my adult life (2006, 2009 and 2018). However this late winter has not really played out like any of those years locally IMO.

BAM Weather bringing up 2011

https://x.com/bam_weather/status/1893988404519481423

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2 hours ago, CheeselandSkies said:

Interesting. A lot of the analogs being pulled by the various TwXers I'm seeing are among the worst springs for chasing in my adult life (2006, 2009 and 2018). However this late winter has not really played out like any of those years locally IMO.

I don't see any of those years being analogs for this year at all.

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See the thing that is interesting is that we are seeing cooling in the middle part of the Pacific in the ENSO regions while having warming near South America

cdas-sflux_ssta_global_1.png

 

This leads to a very positive Trans-Nino Index, which is very conducive to severe in the US, combine that with the -PDO (cooling along Alaska/California along with warmth to the west of it, and an above average Gulf of Mexico. You present a very ripe pattern for western US troughing and strong return flow into the middle part of the country, with above normal moisture. Many of your first year Ninas that decay or weaken in this time frame tend to be blockbuster years. There are exceptions of 2006 but this winter/spring has not played out like that year.

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Quoting myself from the medium/LR thread:
 

6 minutes ago, CheeselandSkies said:

Hoping the one later next week has less moisture issues and can at least pull off a respectable cold-core  :twister:potential somewhere in the region. So much funny stuff has happened in that department in this region absurdly early in the season in recent years (from two consecutive years with a March Iowa EF4 to a 26-mile EF2 in Wisconsin on February 8th) it's almost become an expectation. This week's system was a bit of a reality check.

Last night's 0Z GFS was a favorable look in that regard, with some moisture being tugged back west beneath quite cold mid/upper levels. Subsequent runs slightly less so, with a narrower wavelength to the trough and consequent more meridional flow in the exit region. Long way to go with this one, but something should happen late next week. The floor is probably something similar to what's occurring yesterday/today.

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