Sumatra: Difference between revisions
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<div class="definition"><div class="short_definition">A [[squall]], with [[wind speeds]] occasionally exceeding 13 m s<sup>-1</sup> (30 mph), in the Malacca Strait between Malay and Sumatra during the [[southwest monsoon]] (April through November).</div><br/> <div class="paragraph">It usually blows from the southwest, sometimes from the west or northwest, raising a heavy sea on the Malay coast. The [[wind]] veers and strengthens and a heavy bank or arch of cumulonimbus [[arcus]] passes overhead ([[arched squall]]) with [[heavy rain]] and often [[thunder]]. Sumatras usually occur at night; they bring a sudden drop in [[temperature]] and are generally due to the descent of air cooled by [[radiation]] on the high ground of northern Sumatra. In a few cases they mark an [[air mass]] boundary during the advance of the [[monsoon]]. They are said to occur simultaneously along a line of 320 km (200 miles) or more that advances in a direction between southeast and northeast at about 9 m s<sup>-1</sup> (20 mph).</div><br/> </div> | <div class="definition"><div class="short_definition">A [[squall]], with [[wind speeds]] occasionally exceeding 13 m s<sup>-1</sup> (30 mph), in the Malacca Strait between Malay and Sumatra during the [[southwest monsoon]] (April through November).</div><br/> <div class="paragraph">It usually blows from the southwest, sometimes from the west or northwest, raising a heavy sea on the Malay coast. The [[wind]] veers and strengthens and a heavy bank or arch of cumulonimbus [[arcus]] passes overhead ([[arched squall]]) with [[heavy rain]] and often [[thunder]]. Sumatras usually occur at night; they bring a sudden drop in [[temperature]] and are generally due to the descent of air cooled by [[radiation]] on the high ground of northern Sumatra. In a few cases they mark an [[air mass|air mass]] boundary during the advance of the [[monsoon]]. They are said to occur simultaneously along a line of 320 km (200 miles) or more that advances in a direction between southeast and northeast at about 9 m s<sup>-1</sup> (20 mph).</div><br/> </div> | ||
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Latest revision as of 17:01, 25 April 2012
sumatra
A squall, with wind speeds occasionally exceeding 13 m s-1 (30 mph), in the Malacca Strait between Malay and Sumatra during the southwest monsoon (April through November).
It usually blows from the southwest, sometimes from the west or northwest, raising a heavy sea on the Malay coast. The wind veers and strengthens and a heavy bank or arch of cumulonimbus arcus passes overhead (arched squall) with heavy rain and often thunder. Sumatras usually occur at night; they bring a sudden drop in temperature and are generally due to the descent of air cooled by radiation on the high ground of northern Sumatra. In a few cases they mark an air mass boundary during the advance of the monsoon. They are said to occur simultaneously along a line of 320 km (200 miles) or more that advances in a direction between southeast and northeast at about 9 m s-1 (20 mph).
