This sounds strange... - 21st July 1966

[Lettucing Gutted]

1. According to http://www.personal.dundee.ac.uk/~taharley/1966_weather.htm

The highest temperature of July 1966 was 29c in Perth on the 21st, as cold Easterlies circulating around low pressure affected much of the SE of England.

2. Do you think Perth's warm temperature of 29c in July 1966 was caused by warm, humid South-Southwesterlies (Maritime Tropical air) moving to Perth on the northwestern edge of the Scandi High Pressure Centre as well as the South-Southwesterlies experiencing adiabatic heating as they descend the Grampians (Fohn Effect)?

Edited December 23, 2006 by Craig Evans

[Lettucing Gutted]

The effect of the highest temperature of the day (29c) being in Perth instead of in Southeastern Britain was to effectively reverse the usual south to north decline in temperatures in Britain!

It is amazing that a reversal of the usual south to north temperature decline in Britain can occur in summer as well as winter!

Edited December 23, 2006 by Craig Evans

[Lettucing Gutted]

Sorry correction. I gave the wrong mountain range. It was the Southern Uplands in Scotland that the South-Southwesterlies would have descended to undergo the Fohn Effect to bring Perth's 29c on 21/7/66.

[Hiya]

there is another range of hills between the southern Uplands and Perth, the Ochils. I don't think the terrain is right for the Fohn effect to occur on Perth from a south westerly. Maybe a straight westerly tho.

[Lettucing Gutted]

there is another range of hills between the southern Uplands and Perth, the Ochils. I don't think the terrain is right for the Fohn effect to occur on Perth from a south westerly. Maybe a straight westerly tho.

Thankyou Hiya. A Great point about the Ochils as well. I think that over the years straight westerly winds crossing the Ochils and other Scottish mountains have been responsible for some of Scotland's most supernatural warmth (particularly in Eastern Scotland) in mild winters and warm summers.

Edited December 24, 2006 by Craig Evans