S.E.D.D.
Severe Event Delta Discriminator — Visualizes the change in 500mb wind speeds over a 6-hour window (18z → 00z) using HRRR. Values exceeding +10 kts in an expected outbreak area may be supportive of a tornado threat.
Select Day 1 or Day 2 above to load the latest S.E.D.D. plot.
Plots are generated daily at 03:00 UTC.
Plots are generated daily at 03:00 UTC.
HRRR data is typically available 1–2 days behind the current date.
Data sourced from NOAA NOMADS.