Pressure range

[tangofour]

I have been building an electronic barograph and tracking the passage of fronts over the past few days. The National Physical Laboratory has an online barograph at http://www.npl.co.uk/pressure/pressure.html which shows the passage of the foul weather of the past week. From just over 1033 hPa a week ago to 994 hPa on Monday morning.

Just wondering about the highest and lowest that forumites have seen?

ps - you can see my efforts at 91.84.14.190/baro.dat and 91.84.14.190/baro.log located at crowborough and corrected to sealevel. Pretty graphics to follow one day.

 

[FWB]

Apparently the highest recorded pressure was 1086mb --- Mongolia 19/12/2001. The lowest was in the Pacific 870mb on 12/10/1979.
My NASA Meteoman has a range of 1050-950mb.

 

[whiteoaks7]

Have a read of DEF STAN 00-35 Part 4 from www.dstan.mod.uk the Defence Standards Agency from which I quote (chapter 10):

2.4.2 If sea level values alone are considered, then the nine highest were all observed in the USSR during the cold Asian winter, with an extreme maximum of 1083.9 hPa at Agate (67 N, 93 E, approx. 263 m) at 1200 GMT on 31 December 1968, when the air temperature was -46°C. In January the 'Siberian High' exceeds 1057 hPa on 1% of occasions. The highest value measured in North America was 1070 on the
Alaska-Yukon border on 6 January 1909, while the British maximum was recorded at Glasgow in 1896 when a pressure of 1053.8 hPa was reached.

2.4.3 At the other end of the scale the pressure is reported to have fallen to 870 hPa on 12 October 1979 at 17° N, 138° E, in the eye of a typhoon, and on 18 August 1927 a value of 886.6 hPa was observed on a ship east of Luzon in the Philippines. The lowest pressure recorded in a United States hurricane at
Matecmbe Key, Florida on 2 September 1935 when the pressure fell to 892.3 hPa. The lowest recorded in Great Britain, was 925.5 hPa on 26 January 1884 at Ochertyre, Tayside. In January the 'Icelandic Low' is below 953 hPa on 1% of occasions.

I may be a sad old defence designer but I love this book - it's the Guiness Book of Records for everything environmental. Hailstones like rockets, rapid temperature changes that would freeze you to the street, and solar radiation to charge your batteries in no time - it's all there! And all unclassified and free.

 

[hubert]

My meteoman shows pressure digitally from 850mb to 1100mb. The barograph goes from 950mb to 1050mb. There is also a trend graph showing the rate of change of pressure over the last 24 hours.
Here are a couple of pictures leading up to a storm we had a week or so ago. (Or there would be if only I knew how to attach or paste them in here!) /forums/images/graemlins/frown.gif

 

[richardandtracy]

As of last week you've got to register to get Def Stan's. Quite why it's necessary I don't know.

Regards

Richard.