| Precipitation may be snow, sleet or rain. Icing and turbulence are frequently severe. |
| Precipitation may be snow, sleet or rain. Icing is probable and may range between light and severe. Turbulence is rarely more than moderate. |
| Precipitation and icing are usually nil. Turbulence is rarely more than moderate. |
| Precipitation is frequently in the form of hail. Icing and turbulence are frequently severe. |
EN 