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Everything posted by Frank_Wx

  1. Looks like a 10hPa Strat PV split on today's 12z GFS by Day 10
  2. What are the general signals to a precursor pattern? What should I be looking for?
  3. The Day 10 forecasts are beginning to signal a moderate wave 2 warming event will occur in the upper and mid levels of the Stratosphere. Whether or not this leads to the collapse of the Strat PV remains to be seen. Let's first get this look within Day 5. Here is the ECM OP 10hPa at Day 10. Vortex is looking pretty elongated there.
  4. What's the difference between U wind on Attards site and this NASA "Merra" site?
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