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It's been a hard week for CA w/ major wildfires (#GettyFire, #KincaidFire) affecting the state.
Synoptic weather context is key: Fires were aided by repeated mountain & gap winds via ridge building over the Great Basin. This ridge building enhances the pressure gradient over CA.
Synoptic weather context is key: Fires were aided by repeated mountain & gap winds via ridge building over the Great Basin. This ridge building enhances the pressure gradient over CA.
The synoptic weather sets the stage, but the mountain interaction enhances the winds further.
Let's illustrate the mesoscale details w/ a cross-section across the coastal CA mountain ranges. Hurricane force (#SantaAna) winds form as cold easterly flow tries to cross the barrier.
Let's illustrate the mesoscale details w/ a cross-section across the coastal CA mountain ranges. Hurricane force (#SantaAna) winds form as cold easterly flow tries to cross the barrier.
The record-breaking cold pool intensity associated w/ a 1045-hPa ridge is one reason why this last mountain wind event for southern California may be the worst.
Inland, 850-hPa temps are at record lows, but adiabatic compression modifies the air to near climo on the coast.
Inland, 850-hPa temps are at record lows, but adiabatic compression modifies the air to near climo on the coast.
