| Frontal fog forms in the moist airmass trapped beneath a warm frontal inversion. |
| The airmass was moist and stable in the lowest levels but fairly unstable further aloft. |
| This year the extra water froze only when it fell into the cold Canadian airmass below. |
| This Arctic airmass will affect the eastern two-thirds of the country on Monday as a sharp cold front moves towards the East Coast. |
| Convection in Saskatchewan is most frequently of the airmass variety which is initiated by daytime heating. |
| In the winter months, with a relatively weak gradient from the northwest and a cold airmass, northwest winds can be quite variable. |
