trough of low pressure

trough of low pressure

trough of low pressureclick for a larger image
A pressure system in which the isobars around a low pressure become elongated such that the pressure is lower along the axes of the trough than on its two sides. Sometimes, the isobars at a trough have a pronounced V-shape. Active weather fronts always lie in troughs, but not all troughs are frontal.
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The weather bureau said on Sunday that the trough of low pressure area (LPA) will bring rainy weather over the Mindanao region.
Sudden and extreme weather change on Friday, August 23: Weathermen said a trough of low pressure from the UAE's eastern region triggered it.
"The upper-level pattern will favor a trough of low pressure moving across the western U.S.
"A trough of low pressure extending over the region will result in the flow of a moist air from the Arabian Sea, accompanied with an upper air trough from the north," forecasters said.
PACA's National Multi Hazard Early Warning Centre has forecast a trough of low pressure affecting the sultanate from Friday, April 12 to Sunday, April 14.
Muscat, Apr 10 (ONA) A trough of low pressure will affect the Sultanate from Friday, 12 April to Sunday, l4 April 2019, the weather analysis in the National Multi Hazard Early Warning Centre indicated.
In a statement, the meteorology authority said, "The weather analysis in the National Multi-Hazard Early Warning Centre indicates that the Sultanate is affected by a trough of low pressure from Friday 22nd to Sunday 2th March 2019," "According to the latest weather outputs, the weather will continue being partly cloudy to cloudy over governorates of Musandam, AL Burainimi, Al Dhahirah, North Al Batinah, South Al Batinah, Al Dakhiliyah, Muscat, North Al Sharqiyah and South Al Sharqiyah with chances of isolated rain, occasional thundershowers," added PACA.
The month will begin with a stormy trough of low pressure linked to ex-hurricane Oscar piling towards the UK, especially affecting northern and western areas during this coming weekend.
Under the influence of a trough of low pressure, the weather in Hong Kong was mainly cloudy with occasional heavy showers and thunderstorms on September 1.
The fine spell will continue in the Midlands and south on Wednesday but more unsettled conditions will start to push down the country followed by cooler, fresher weather as a dip in the jet stream allows a trough of low pressure to take charge.
A report issued by the Met department says the country is "affected by an upper-level trough of low pressure" which is centred over the northern Arabian Peninsula.
The tail-end of a cold front is affecting Southern Luzon while a trough of low pressure area (LPA) is affecting the eastern portion of Mindanao.