PORT Pirie is reeling from five consecutive days of sub-zero temperatures.
Since Saturday, the city experienced very cold mornings with temperatures dropping below zero degrees, according to Recorder weatherman Joe McLaughlin.
Saturday morning had a low of -1.8C followed by Sunday with -2.3C, Monday with -2.2C, Tuesday with -1.2C and yesterday with -1.3C. This is the coldest snap since the airport weather station re-opened five full years ago.
Since the reopening of the airport station in August, 2006, and to the end of July this year there have been 17 days during the winter months when the mercury has fallen below0C.The lowest of those was -2.7C on July 29, 2008.
Previous to the airport occurrences, the only other incidences of below-zero readings were at the post office during June and July in 1958 when five days were below zero, with the lowest being -1.7C on June 27 and 29.
The only other incident was at the Harbours Board site when -0.6C was recorded on May 13, 1960.
In the five full years during 2007-2011, when both weather stations were operating simultaneously, there was a low anomaly of between 2.2C and 2.5C for the winter months minimum temperatures between the airport site with its open spaces and those taken at the more enclosed sites in the city centre.
With that anomaly in mind the -1.7C recorded at the post office in 1958 would most probably have been about -4C or lower if it had been recorded at the airport site.
JULY WARMER AND DRIER THAN AVERAGE
JULY – the mid month of winter – was warmer and drier than average.
This is according to Recorder weatherman Joe McLaughlin.
Although it rained on the average 13 days, the rainfall of 21.6mm was well below the average 37.1mm.
The highest daily rainfall was 6.0mm on July 10.
To the end of July, rain had been recorded on 59 days – nine more than average – and the highest number since 65 days over the same period during 1995. Rainfall to the end of July has totalled 276.6mm and is well ahead of the average 225.6mm for the seven months.
Night-time temperatures averaged 6.2C and were half-a-degree above average with a high of 11.1C and a low of 0.4C.
The average daily maximum of 16.8C was 0.3C above average and the warmest since the record 16.9C at the airport, shared by 2007, 2009 and 2013.
July’s highest recorded average daily maximum was 18.6C during 1975.
The highest maximum for the month was recorded on the last day when the mercury reached 21.8C.
The previous three days had highs of 20C or above and, although the July 29 reading was not recorded manually, it was recorded on the automatic weather station at the airport.
Strong northwesterly winds prevailed on two days of the month.
Joe McLaughlin compiled the statistics from data supplied by the Port Pirie airport weather station and the Bureau of Meteorology.
This story Administrator ready to work first appeared on Nanjing Night Net.