QNH extremes

[Ultralights]

is 1043 the highest QNH setting you have ever used? as was the case over Tassie today?

[compressor stall]

I have a vague recollection of a 1046 at EN in the late 90's..?

[Aye Ess]

Lowest I've had was 983, in Switzerland in the early 1990s.

[Atlas Shrugged]

1040 highest for me departing Scone for BK somewhere between 2000-2005 (can't remember off the top of my head)

[noip]

Lowest ... 952 departing LHR in the late '80s

N

[Red Jet]

Was flying in the NWT (Northern Canada) in January 1989, and when we woke up one morning getting ready to go to the airport - a combination of extremely cold Arctic air mass and the oblique sun angle had produced a high pressure at the Yellowknife airport of 31.78 inHg (1076 Mb). At the same day an all time record (which still stands BTW - I just looked it up) for the North American continent was measured in Alaska of 31.84 inHg (1078 Mb). I remember that all IFR flights was canceled in Alaska as there is an FAR that grounds all aircraft when the Mercury gets above 31 inHg. I was "lucky enough to be" flying a bug smasher in VFR, and had the "pleasure" of hooking up the Herman Nelson heater to get the thing going, as the temperature was hovering below -45C. The performance at takeoff was worth it though - we literally leaped into the air and never in history has a Twin Comanche climbed to altitude quicker:ok::eek::ok:

[Jabawocky]

thats too cold ......:eek: So did the avgas heater work?

[Red Jet]

did the avgas heater work?

Sadly - NO! I vividly remember how farkin difficult it was to move the throttles and props though, and once the props had been set in the cruise, they could not be moved to fine pitch again for approach. Not that we would have needed it, even if we'd lost a donk. Engine out performance was not an issue that day:ok:

[VH-XXX]

Red Jet, did you work for Buffalo Joe?

[aerostatic]

Seen sub 980 going into NZCH a few years back.

[mmhbtower]

1044 in ML in 2003 cant remember the date

[Biggles78]

Seen sub 980 going into NZCH a few years back.
You don't remember when exactly that was do you? I went out one day in CH several (many) years ago and noted that FL130 could NOT be used for a cruise level due to the low QNH. (Back in the days when 11,000' to FL130 was the Transition Layer)

[DirectAnywhere]

NOIP, was it this??


Great Storm of 1987 - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Great_Storm_of_1987)

BBC ON THIS DAY | 16 | 1987: Hurricane winds batter southern England (http://news.bbc.co.uk/onthisday/hi/dates/stories/october/16/newsid_2533000/2533219.stm)

Wapedia - Wiki: Great Storm of 1987 (http://wapedia.mobi/en/1987_hurricane)

I spent that night in Essex before flying out of LHR on the 16th. Took 5 hours from Chelmsford to Heathrow. 953 was the number I remember.

[noip]

That's the one. The weather wasn't too bad when we left, but two hours later it came through and cleaned up a few things.

Afterwards we got to thinking ... What is the lowest QNH you can use on an altimeter? ..... 950 :eek:

N

[Tmbstory]

In the month of December 1999 a low pressure developed in the Bay of Biscay and instead of heading North East, it came Due West and did tremendous damage through central parts of France.

As it destroyed most of my roof the Pressure Barometer was reading 967.5 MB.

The noise was something to hear, like an express train going through!!.

Tmb

[Raropilot]

978Hpa going into NZNS a few weeks ago :}

[Ultralights]

looking at todays forecast, 1044 predicted for Friday, over the bight, so nice cold southerlies all weekend up the coast.

[Pontius]

Oct 1987, Bay of Biscay, flying from HMS Ship I have a note in the logbook that states QNH/QFE of 948mb. I thought that was pretty good until 1992, when in the States and affected by the edge of Hurricane Andrew and the QNH was in the 920s.

I prefer the high QNHs and time off 'cos the fish seem to bite better ;)