A new layer Cell Tops and an upgrade to Warning Polygons was released today.
The new Cell Tops layer displays large-scale storm movements, both direction and speed, and height in 100's of feet. If present, threat attributes HAIL, MESO, or TVS are also displayed. This layer is commonly seen in Radar Summary weather graphics used by pilots.

Cell Tops layer provides an overview of large-storm movements

If present, threat attributes are displayed alongside each cell
Warning Polygons (a.k.a Storm Warnings) has also received an upgrade:

Direction, speed, and projected path are now displayed
with convective warnings (Severe, Tornado, and Marine Warnings).

Similar to the Storm Tracks layer, mousing over the track icon
will display a projected path out to 1 hour
Both layers are FREE UPDATES for existing susbscribers:
Warning Polygons
- First remove Warning Polygons from your map (or Storm Warnings if you are using Summer Weather map).
- On the Map toolbar, click Add Layers > (Browse All Layers) > Severe Weather category.
- Find Warning Polygons and click Add To Map.
Cell Tops
- On the Map toolbar, click Add Layers > (Browse All Layers) > Severe Weather category.
- Find Cell Tops and click Add To Map.
If you need help re-arranging layers on your map, see: