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Shower advection
Non-advection inland of showers (equilibrium convection)
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Fig9.6.3: This newer example was with non-equilibrium convection, introduced into the IFS in 2013: precipitation fields when showers developed over the Great Lakes in very cold air on a westerly wind (mm rainfall equivalent). Significant showers are shown where strong convection is initiated over the relatively warm waters of the Great Lakes, but give very small amounts of showery precipitation down-wind where instability is weakly initiated or not initiated over the cold land. In reality the showers developing over the Great Lakes persisted long enough to be blown well inland as active convection. Note in particular the difference in precipitation east of Lake Michigan.
Inland penetration of wintertime maritime showers
Wintertime maritime convection can penetrate further inland than indicated by IFS forecasts.
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