January West Coast Extratropical Cyclone

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January West Coast Extratropical Cyclone

Presentation transcript:

January 3-4 2008 West Coast Extratropical Cyclone Very intense cyclone Had a minimum central pressure of 956 mb. Characterized by warm advection Rapid development of system Criteria met for “meteorological bomb” Strong winds and heavy precipitation

24-hour precipitation totals ending 12 UTC 5 Jan 2008

Synoptic Overview Minimum pressure of 984 mb. 00Z Jan 3 South of Aleutian Islands Moved eastward and intensified Pressure of 954 mb. 12Z Jan 4 Warm front moving over CA at this time Strong negative omega values Large pressure drops and strong wind speed

Note the rapid pressure decrease and corresponding wind increase at KSFO

QG Omega Equation and SPDE LHS: Omega term RHS: Differential vorticity advection, temperature advection terms SPDE LHS: 1000 mb Relative vorticity tendency RHS: 500 mb vorticity advection, 1000 mb horizontal temperature advection terms