The Big Chill
This is of course a relative statement.
Really chilly is exemplified by Churchill Manitoba which on my visit in October 1991 got down to about -30oC wind chill with blowing snow. I commented on this to the doorman at the pub we were staying at and he responded that in January the windchill is often -100oC. On Scott's expedition to the Antarctic some temperatures of -70oF (~-57oC) were recorded - and I think that was without adjusting for wind.
That being said -5.9oC actual temperature at 0719 on 16 July was cool enough for us to defer the dog walk for a while. Indeed at 0800 it was still -4oC so we had another cup of coffee.
The timing of the minimum was quite normal occurring just before the sun pops over the ridge to the East of us. For this month the time of the daily minima at our house is illustrated below.
The very late minimum on the 6th follows a very warm overnight between the 5th and the 6th. In a significant majority of cases the minimum occurs between 0600 and 0800 mostly between 0700 and 0800.
After posting a comment on Facebook a few of the other folk around the area have reported their observations. They are shown (positions approximate) on the attached snip from Google Earth.
Our place is at 780m AMSL. The Flat is about 850m AMSL and in a valley so cold air will tend to pool there giving very cold temperatures. The second coldest reading is a property on the 'lip' of the Hoskinstown Plain: again frost hollow where cold air pools.
Really chilly is exemplified by Churchill Manitoba which on my visit in October 1991 got down to about -30oC wind chill with blowing snow. I commented on this to the doorman at the pub we were staying at and he responded that in January the windchill is often -100oC. On Scott's expedition to the Antarctic some temperatures of -70oF (~-57oC) were recorded - and I think that was without adjusting for wind.
That being said -5.9oC actual temperature at 0719 on 16 July was cool enough for us to defer the dog walk for a while. Indeed at 0800 it was still -4oC so we had another cup of coffee.
The timing of the minimum was quite normal occurring just before the sun pops over the ridge to the East of us. For this month the time of the daily minima at our house is illustrated below.
After posting a comment on Facebook a few of the other folk around the area have reported their observations. They are shown (positions approximate) on the attached snip from Google Earth.
Comments