3 ms·
I find it interesting that no one seems to be talking about the fact that we're having deadly tornadoes in December. This is not normal, especially if this was
by dhosek 5y ago
I find it interesting that no one seems to be talking about the fact that we're having deadly tornadoes in December. This is not normal, especially if this was a multiple tornado event, but even one really big one would be way out of the ordinary. Maybe it's my northern Illinois upbringing, but tornadoes this time of year seems way unlikely.
- danans 5y agoIt's pretty shocking. I found this paper which mentions the following, most of which I don't understand: https://www.sciencedirect.com/science/article/pii/S2212094717300956 https://www.sciencedirect.com/science/article/pii/S221209471... "Recent work has determined that peak, or maximum, tornado activity in the Great Plains has shifted earlier in the year by an average of 7 days (Long and Stoy, 2014) and 12–13 days (Lu et al., 2015) relative to the 1950s. Observed shifts in the seasonality in the Great Plains are accompanied by corresponding trends in convective available potential energy (CAPE) and the fourth power of storm relative helicity (SRH4), as well as their interaction, CAPE × SRH4 (Lu et al., 2015)." The CAPE measurement above, which seems to be a measure of fuel availability for thunderstorms, is apparently predicted to rise with global heating: https://ui.adsabs.harvard.edu/abs/2020JCli...33.2025C/abstract https://ui.adsabs.harvard.edu/abs/2020JCli...33.2025C/abstra...