| In Victoria, many of the heaviest rainfall events occur when a depression develops over the State within an existing moist airmass. |
|
| The airmass was moist and stable in the lowest levels but fairly unstable further aloft. |
|
| While airmass thunderstorms still remain the predominant type, frontal thunderstorms and nocturnal thunderstorms are common. |
|
| Frontal fog forms in the moist airmass trapped beneath a warm frontal inversion. |
|
| Convection in Saskatchewan is most frequently of the airmass variety which is initiated by daytime heating. |
|
| Since the arctic airmass is dry and cold, the moisture to produce the clouds comes from the Maritime stream. |
|
| Behind the cold front, a period of strong northwesterly winds of 35 to 50 knots heralds the arrival of a colder, unstable airmass. |
|
| During the fall, with a cold airmass flowing over the open water of Frobisher Bay, southeast winds can also be gusty. |
|
| 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. |
|
| In the winter months, with a relatively weak gradient from the northwest and a cold airmass, northwest winds can be quite variable. |
|
| Radiation fog tends to develop under light wind conditions, with a moist airmass and cool early morning temperatures associated with clear nigh time skies. |
|
| The base can be less than 1,000 feet if the airmass is very unstable. |
|
| Hurricane Bill encountered a tropical airmass when it arrived in Atlantic Canada which delayed the onset of extratropical transition until it was well into the Atlantic region of Canada. |
|
| If you expect the average airmass motion to be slightly positive during the final glide, you may be able to start the glide 1or 2 bars low and still reach the goal. |
|
| This occurs when moist air cools, usually when an airmass rises through the atmosphere. |
|
| They are probably produced in the Gulfs of Tehuantepec and Papagayo by the severe mountain-pass wind jets associated with cold airmass outbreaks over North America. |
|
| Also with a tropical storm airmass came warm and muggy conditions. |
|
| Orographic mechanisms causing enhanced convergence and lift make the foothills a prime area for the onset of convective activity in unstable airmass situations. |
|
| The airmass was nearly saturated throughout the isothermal layer. |
|
|
|
| The airmass was forecast to be stable with extensive low-level moisture. |
|
| There are sharp changes where the airmass is rising or falling, and such changes are repeated frequently over a few hundreds of square kilometres. |
|
| If the airmass is sufficiently unstable, the lakes can provide enough low level moisture to initiate and accentuate convective activity in the area. |
|
| As one would expect, the area is susceptible to mechanical turbulence up to several thousand feet above the terrain in windy conditions, and in enhanced convective weather when the airmass is sufficiently unstable. |
|
| Simple airmass convection can also be fairly predictable. |
|
| The advected airmass, however, remains too shallow to produce any typical summer thunderstorms of meaningful intensity. |
|
| Orographic precipitation is similar, except the upwards motion is forced when a moving airmass encounters the rising slope of a landform such as a mountain ridge. |
|
