Continental or maritime are dependent on whether the air masses
come from over land or sea.
This can be explained by the dominance of air masses
from the south and south-east.
A sharp cold snap in Kyrgyzstan is due to the Arctic air masses
, Kyrgyzhydromet reported on January 24.
In very cold air masses
, altimeter settings will frequently rise above 30.
In its detailed weather forecast, it indicated the following: - General weather condition: Eastern Mediterranean basin will continue to be under the influence of warm air masses
until Tuesday afternoon, accompanied by cold air masses
leading to rainy weather - Weather forecast in Lebanon: Sunday: Overall clear with limited rise in temperature, especially in mountainous and inland areas, and low humidity Monday: Clear with few clouds, gradually turning into high clouds with stable temperatures and low humidity Tuesday: Partly cloudy, temperatures start to gradually decrease.
Twisters are formed when warm, moist air masses
meet with cool air, creating instability in the atmosphere.
Media reports that clashing air masses
produce tornadoes mischaracterize the abundant new observational and modeling research on how tornadoes form.
Shanghai has been plagued by high levels of air pollution for several days after air masses
carried industrial emissions from neighbouring Jiangsu and Zhejiang provinces.
Meteorological officer Philippos Tymvios yesterday said warm and humid air masses
were to blame for the last four days of warm weather.
The tool used to obtain information about the origin of the air masses
arriving to the station has been the 10-day backward isentropic trajectories.
When water vapor condenses inside a thunderstorm, the heat that's released drives fast-rising air masses
that can spawn tornadoes.
Because squall line thunderstorms are often triggered by weather fronts (boundary along which cold and warm air masses
collide) rather than by the sun heating air at the earth's surface, the storms can happen any season, day or night.