Adelaide sweltering through long run of March heatBen McBurney, Tuesday March 5, 2013 - 15:42 EDT
Adelaide has begun potentially its third longest run of March heat in 127 years of records, with the city on target for 11 consecutive days of 30 degrees or hotter.
A slow-moving low pressure trough is allowing heat to build over South Australia. In Adelaide, the past four days have already exceeded 30 degrees, with yesterday and today both reaching 35 degrees. The next seven days are also forecast to reach at least 30 degrees, which would make it the city's third longest run of 30-degree heat on record.
Since records began in 1887 there only other longer runs of 30 degre days in march were in 2008, when there were 16 days and in 1934 when were 13 days.
Many residents will have memories of the March 2008 heatwave, which was not only the longest March heatwave on record but the longest heatwave on record for any month with 15 days above 35 degrees and 12 days above 38 degrees.
Thankfully for most, this current run of heat will seem relatively mild. However, it is still worth staying well hydrated and avoiding strenuous exercise. As well as hot days, this spell of heat is likely to be accompanied by very warm nights. Humidity will also be higher than average, making it feel up to three degrees hotter than what it actually is. However, some relief may be on the cards during the afternoons and evenings, as the high humidity combines with the trough, bringing the risk of showers and storms.
At this stage, the last hot day of this period should be next Tuesday, when a cool change moves through later in the day. This will bring much more tolerable conditions, with temperatures returning close to average.
© Weatherzone 2013
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