![wind graph](/sites/default/files/2024-05/polar-vortex-winds-graph-20240502_0.png)
File name: polar-vortex-winds-graph-20240502.png
Original Resolution: 2000 × 984
File Size: 174 KB (MIME Type: image/png)
Observed and forecasted (NOAA GEFSv12) wind speed at the 10-hPa pressure level and the 60-degrees North latitude circle. The final stratospheric warming occurred on April 28 (where thick magenta line falls below 0 m/s), 16 days later than normal (where the thin purple line falls below 0 m/s and stays there through summer). NOAA Climate.gov image, adapted from original by Laura Ciasto.