20 May 2005: Loop mslp.

 20 May 2005: Loop 850 T.

 20 May 2005: Loop 850 T with mslp.

 20 May 2005: Loop 500 height.

 20 May 2005: Loop 500 height with mslp.

 20 May 2005: Loop 500 height with mslp & infrared satellite imagery.

Polar-front cyclone model.
Cyclones: where they occur, where they form, and where they decay.
Cyclone tracks.