Tempestas Tonitrua
Member
You’ll take any opportunity to hijack whatever conversation is at hand back to your theory won’t you?In theory, yes, but in actuality we have been mostly underperforming in terms of major tornado outbreaks this spring, given the emergent Niña and the -PDO. Under similar circumstances a few decades ago, in the pre-warming era, we might well have seen multiple HIGH-Risk events that verified tornado-wise, especially in terms of long-tracked EF2+ events. So far only 26–7 April really merited a HIGH Risk tornado-wise to date. If you look at posts from a few months ago you will see that some people were bringing up high-end years such as 1974 and 2011 as analogs or parallels. To date verification has not gone so well. We are seeing above-average numbers of (lower-end, shorter-tracked) tornadoes, but possibly fewer strong, long-tracked events than one might have anticipated.
Back OT: I will openly concede that I personally believe all the high-end forecasts for this season, like a lot of the high-end expectations tornado-wise to date, are likely to bust, and I will freely use that term. Others are equally free to disagree with this, but I am really skeptical, in light of long-term trends toward a drier, more stable tropical Atlantic and a weaker +AMM—trends that seem to be consistent with a warmer climate. I personally suspect that this has something to do with changes in the seasonality, spatiality, and/or intensity of (major) tornado outbreaks as well. I am sticking to a contrarian and unpopular position here, but I really do not believe that this season will see more than 140 units of ACE or so, much less 190-plus units. The past few seasons have been mostly underwhelming:
Also, over the past two or three seasons the EC model in May has been overestimating seasonal ACE by fairly large margins.
- 2022: CSU in July forecasts ten hurricanes and five majors. Actual totals: eight hurricanes and two majors.
- 2023: CSU in August forecasts nine hurricanes and four majors (University of Arizona in June: twelve hurricanes and six majors; UKMO in August: nine hurricanes and six majors). Actual totals: seven hurricanes and three majors.
CSU April forecasts with seasonal ACE ≥ 160 units, 1995–present:
CSU June and/or August forecasts with seasonal ACE ≥ 160 units, 2014–present:
- 2006: 183 (observed: 83)
- 2007: 174 (observed: 74)
- 2011: 160 (observed: 126)
- 2013: 165 (observed: 36)
- 2022: 160 (observed: 94)
- 2020: 160–200 (observed: 180)
- 2022: 160–180 (observed: 94)
- 2023: 160 (observed: 148)
Who was seriously comparing this year to 2011/1974?? The analogs for this year were always 1973, 2010, and 2016. Not even close to 2011 or 1974. For one, we aren’t even officially in a La Niña state yet.
Regarding tropical season, or any severe weather event, it’s easy to sit back and underforecast and move the goalposts. We will see how this season plays out.