Cold Fronts in the Central Plains: 4-6 and 8-10 March 2003

Javascript animation of potential vorticity (PV units) and potential temperature (K) in a cross section through the arctic airmass and cold front: RUC analysis (00 UTC 5 March - 23 UTC 8 March)
Snapshots:
[00 UTC 5 March]
[12 UTC 5 March]
[00 UTC 6 March]
[12 UTC 6 March]
[00 UTC 7 March]
[06 UTC 7 March]
[12 UTC 7 March]
[18 UTC 7 March]
[00 UTC 8 March]
[06 UTC 8 March]
[12 UTC 8 March]
[18 UTC 8 March]
[23 UTC 8 March]

Snapshots from NCEP/NCAR Reanalysis:
[Sea-level Pressure: 00 UTC 5 March 2003]
[Sea-level Pressure: 12 UTC 5 March 2003]
[Sea-level Pressure: 00 UTC 6 March 2003]
[Sea-level Pressure: 12 UTC 6 March 2003]
[Sea-level Pressure: 00 UTC 7 March 2003]
[Sea-level Pressure: 12 UTC 7 March 2003]
[Sea-level Pressure: 00 UTC 8 March 2003]
[Sea-level Pressure: 12 UTC 8 March 2003]
[Sea-level Pressure: 00 UTC 9 March 2003]