Surface weather analysis isotherms (lines of equal temperature), and isotachs (lines of equal wind speed) are drawn. The abstract weather symbols were devised to take up the least room possible on weather maps. A synoptic scale feature is one whose dimensions are large in scale, more than several hundred kilometers in length. Migratory pressure systems and frontal zones exist on this scale. Centers of surface high- and low-pressure areas that are found within closed isobars on a surface weather analysis are the absolute maxima and minima in the pressure field, and can tell a user in a glance what the general weather is
What Love Is Made Of number six. In Belgium, on the Ultratip Flanders chart, it charted at the runner-up position, while on the Scotland singles chart, its peak was at number 33. Directed by Emil Nava, the official music video for "What Love Is Made Of" was released on 29 May 2013. According to Michael Depland from MTV Buzzworthy, the visual takes inspiration from the American action film series The Fast and the Furious, as it delves into "the world of underground of street racing". A behind-the-scenes video for it was released on 14 June 2013. The video begins with a closeup shot of Katy's