-9.7˚C morning followed by 17.5˚C afternoon in Glen Innes
Temperatures at Glen Innes in New South Wales dipped to -9.7˚C this morning despite a maximum temperature of 15.5˚C yesterday afternoon. Maximum temperatures reached 17.5˚C this afternoon.
The big drop in temperature overnight was due to excellent radiational cooling with clear skies, light winds and very dry air. Dew points dipped below -15˚C with relative humidity down to 10% this afternoon.
Infrared satellite images and surface observations suggest that the area around Glen Innes was the coldest part of Australia this morning with the possible exception of the peaks of the Snowy Mountains.
On July 19 2019, Glen Innes saw temperatures dip to -12.3°C while temperatures rose to 16.8°C that day and a maximum of 13.6˚C the day before.This morning was the coldest morning since then and the coldest August morning since around -9.8°C on the morning of August 7 2012.
The coldest morning on record at the station with records from October 1996 is -12.8°C on July 8 2002 and August 9 2008 with the afternoon of July 8 2002 having a maximum temperature of 17.3°C with the maximum temperature the day before being 14.0°C.
The town is located around 1000 meters above sea level and has mountains to the east and some hills to the west.
Analysis of wind patterns suggest that at night, cold air drainage occurs from the mountains while during the day air rises up the mountains due to heating. The station sees a diurnal wind pattern with westerly winds during the day and easterly winds at night comparable to a sea and land breeze pattern.
At night the cold air gets trapped near Glen Innes since there are hills to the West.
The shape of the slope to the east makes the diurnal patterns particularly strong.
The relevant station is Glen Innes Airport which is at an altitude of around 1000 meters above sea level.
Infrared satellite image suggesting the area around Glen Innes possibly being the coldest around Australia this morning (see arrow):
The big drop in temperature overnight was due to excellent radiational cooling with clear skies, light winds and very dry air. Dew points dipped below -15˚C with relative humidity down to 10% this afternoon.
Infrared satellite images and surface observations suggest that the area around Glen Innes was the coldest part of Australia this morning with the possible exception of the peaks of the Snowy Mountains.
On July 19 2019, Glen Innes saw temperatures dip to -12.3°C while temperatures rose to 16.8°C that day and a maximum of 13.6˚C the day before.This morning was the coldest morning since then and the coldest August morning since around -9.8°C on the morning of August 7 2012.
The coldest morning on record at the station with records from October 1996 is -12.8°C on July 8 2002 and August 9 2008 with the afternoon of July 8 2002 having a maximum temperature of 17.3°C with the maximum temperature the day before being 14.0°C.
The town is located around 1000 meters above sea level and has mountains to the east and some hills to the west.
Analysis of wind patterns suggest that at night, cold air drainage occurs from the mountains while during the day air rises up the mountains due to heating. The station sees a diurnal wind pattern with westerly winds during the day and easterly winds at night comparable to a sea and land breeze pattern.
At night the cold air gets trapped near Glen Innes since there are hills to the West.
The shape of the slope to the east makes the diurnal patterns particularly strong.
The relevant station is Glen Innes Airport which is at an altitude of around 1000 meters above sea level.
Infrared satellite image suggesting the area around Glen Innes possibly being the coldest around Australia this morning (see arrow):
Contour map: