air mass

Air mass thunderstorms usually form in the spring and summer.

A cold "marine layer" forms above the cold waters, where heat in the air mass contacts the water.

The CWB said on Facebook today that the continental cold air mass will continue to bring scattered showers, but the wet weather will gradually give way to drier conditions as the day wears on.

As a result, the deepening of the upper air trough will lead to a cold air mass causing unstable weather conditions and an increase in the amount of clouds by Monday.

The cause of this changeable and unsettled but mild weather is down to a tropical maritime air mass moving across the British Isles from southwest of the Atlantic.

This air mass comes from desert regions like North Africa and the Sahara.

Consequently, the high insolation causes the maritime air mass to have particular characteristics that are similar to a maritime tropical air mass [22], which can be replaced only by three main points: the Gulf of Lion, and the straits of Sicilia, and Gibraltar.

It replaces the Arctic maritime air mass which has been sitting over the UK during the last fortnight.

Weather Forecaster Zakariya al-Issa told SANA thatthe instability in the weather in the country came as a result of being affected by acold and wet polar air mass that would cause a drop in the temperatures and the fall ofthundershowers in different areas and snow on the mountains.

The meteorological office's Panayiotis Mouskos has said snowfall is likely by the end of the week or beginning of next, caused by a cold air mass coming Cyprus' way from the north.

The limited upper extension kept the hazy upper air mass more or less in place as we saw with the clear blue skies (like the previous week) just not in evidence.

PNN The Palestine Weather Service reported that a cold air mass affects the region with a major drop in temperatures amid rain storms and occasional hail on Monday and continues through Wednesday with no considerable change in temperature on Tuesday.