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.
References in periodicals archive ?
Leonard also said a trough of low pressure has been in the Northeast since mid-January while the Pacific Northwest has been in an area of high pressure which explains why Alaska has been mild and almost snowless this winter.
The center said that some weakening is expected by late Wednesday and the depression is forecast to degenerate into a trough of low pressure in two to three days.
With a trough of low pressure expected to eventually merge with Arthur this weekend, we expect the storm to be in a "hybrid state" when it moves through or tracks offshore," Chris Fogarty from the Canadian Hurricane Centre said in a technical information statement on the Environment Canada website.
But the low pressure cell is an area of clockwise circulation meaning it causes a north wind on our coastline, thereby bringing the Angolan low pressure area south along our coastline in a clearly defined trough of low pressure.
Muscat : The latest weather charts indicate that the effect of the trough of low pressure will continue on the Sultanate skies.
Muscat, Mar 27 (ONA) The latest weather charts indicate that the effect of the trough of low pressure will continue on the Sultanate skies.
It was a very deep trough of low pressure that brought the winds, but they eased off late in the afternoon and were being replaced by high pressure which should mean brighter weather for the weekend.
Talking to Qatar Tribune, the Head of Forecast and Analysis Section Abdulla Mohammed al Mannai said, "The primary reason for the dusty weather and light rain is the trough of low pressure in the upper air level over the Arabian peninsula.
There is a trough of low pressure in the Arabian Sea -- and winds are strengthening," B.
Dec 25: The crew's worst fears were realised when the balloon hit trough of low pressure over the Pacific.
Branson and his team finally conceded defeat to the weather after hitting a trough of low pressure more than halfway through their record attempt.
In the April 15 JOURNAL OF THE ATMOSPHERIC SCIENCES, Molinari reports the hurricane indeed encountered a trough of low pressure in the upper troposphere 30 hours before it intensified.