Coupled Jets

Good looking signature ahead of Friday/s snow storm.

Transverse...ageostrophic circulations in the entrance region of the polar jet advect cold air into the storm from the NW. Transverse...ageostrophic circulations in the exit region of the sub-tropical jet advect moist air into the storm from the SE. Enhanced omega occurs at the intersection of these circulations.

GooFuS also throws in some additional forcing with strong...low-level...warm air advection.

Could be a memorable event.