Simon Lee
@simonleewx.com
Lecturer in Atmospheric Science, University of St Andrews. Large-scale weather & climate variability, prediction & change. simonleewx.com
06Z GFS has remarkably persistent Greenland blocking for the full run, and a very weak stratospheric vortex by the end of it too. Posting this just for fun, but falls within what seems to be the range of possible outcomes based on recent modelling.
November 8, 2025 at 2:45 PM
06Z GFS has remarkably persistent Greenland blocking for the full run, and a very weak stratospheric vortex by the end of it too. Posting this just for fun, but falls within what seems to be the range of possible outcomes based on recent modelling.
Evolution of #StormAmy from 18 UTC 1 October through 12 UTC 4 October per Met Office analyses. The initial disturbance was perfectly phased with a wave in the jet, undergoing explosive cyclogenesis & evolving into a powerful Shapiro–Keyser cyclone, setting low pressure records for the time of year.
October 4, 2025 at 3:12 PM
Evolution of #StormAmy from 18 UTC 1 October through 12 UTC 4 October per Met Office analyses. The initial disturbance was perfectly phased with a wave in the jet, undergoing explosive cyclogenesis & evolving into a powerful Shapiro–Keyser cyclone, setting low pressure records for the time of year.