I don't know if I've seen pressure this low before........YOD altimeter 28.83
CYEG 051500Z 24002KT 15SM FEW090 BKN200 M10/M12 A2878 RMK AC2CI2 SLP783
CYEG 051400Z 18006KT 15SM SCT160 M06/M08 A2877 RMK AC3 SLP777
CYZH 051500Z AUTO 11006KT 9SM CLR M05/M08 A2878 RMK SLP779
CYZH 051400Z AUTO 13008KT 9SM CLR M04/M08 A2879 RMK SLP781
CYZH 051321Z AUTO 14009KT 9SM FEW082 M04/M08 A2880
CYOD 051500Z 07005KT 15SM BKN140 BKN240 M04/M07 A2883 RMK AS6CS1 SLP795
CYOD 051400Z 07006KT 15SM OVC140 M03/M07 A2883 RMK AC8 SLP792
CYLL 051500Z 18012KT 15SM FEW060 BKN080 M02/M06 A2877 RMK SC2AC5 SLP775
CYLL 051400Z 15007KT 15SM FEW060 BKN080 M02/M06 A2880 RMK SC2AC5 SLP786
CYLJ 051500Z 10013KT 15SM FEW080 BKN200 M04/M06 A2885 RMK AC2CI4 SLP799
CYLJ 051400Z 11008KT 15SM OVC200 M02/M04 A2886 RMK CI8 SLP796
Low pressure on the Prairies
Moderators: lilfssister, North Shore, sky's the limit, sepia, Sulako, I WAS Birddog
Re: Low pressure on the Prairies
gotta love saying "sorry Flight Level 190 unavailable due to low altimeters." Lowest I've seen was last fall in the Hearst / Kap area 2874 i say again 2874
Re: Low pressure on the Prairies
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Last edited by altiplano on Fri Aug 13, 2010 12:11 am, edited 1 time in total.
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Siddley Hawker
- Rank 11
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- Location: 50.13N 66.17W
Re: Low pressure on the Prairies
Fairly regular occurrence on the East Coast. You get a low coming up the east coast, up through the Gulf of Maine, and another one approaches from over the Great Lakes. They join up over the Gulf of St. Lawrence into one big mother of a low. I've seen the altimeter in Wabush at 2798, about 20 years ago in January. The last big snowstorm we had here on December 14, the altimeter was 2853.
Re: Low pressure on the Prairies
pokaroo wrote:gotta love saying "sorry Flight Level 190 unavailable due to low altimeters." Lowest I've seen was last fall in the Hearst / Kap area 2874 i say again 2874
Heck that is its below 29.92. FL200 wouldnt even be available!
Re: Low pressure on the Prairies
You may want to recheck your figures....chief wrote:pokaroo wrote:gotta love saying "sorry Flight Level 190 unavailable due to low altimeters." Lowest I've seen was last fall in the Hearst / Kap area 2874 i say again 2874
Heck that is its below 29.92. FL200 wouldnt even be available!
IF THE ALTIMETER SETTING IS: THEN THE LOWEST USABLE FLIGHT LEVEL IS
29.92 OR HIGHER you may use FL180
29.91 TO 28.92 you may use FL190
28.91 TO 27.92 you may use FL200
27.91 OR LOWER you may use FL210
Re: Low pressure on the Prairies
Seen 28.72 in Gander a few years back.....couldn't see the plane 100' from the term!!!
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snaproll20
- Rank 7
- Posts: 636
- Joined: Tue Jun 01, 2004 7:50 pm
Re: Low pressure on the Prairies
Have seen pressure completely off the altimeter range top and bottom.
I guess if you are around long enough, it is bound to happen.
It is a little eerie, but if you are going somewhere where they don't report, then you just have to be a little more careful than usual anyway. Understand pressure gradients.
Once it is off the altimeter's range, it has become so radical that only a major meteorological event is going to drive it further from the normal. (almost like trying to achieve absolute zero Kelvin.)
Mark it in your personal log book. Show your granchildren. Boast at cocktail parties.
Stay away from people who may be affected by low pressure.
I guess if you are around long enough, it is bound to happen.
It is a little eerie, but if you are going somewhere where they don't report, then you just have to be a little more careful than usual anyway. Understand pressure gradients.
Once it is off the altimeter's range, it has become so radical that only a major meteorological event is going to drive it further from the normal. (almost like trying to achieve absolute zero Kelvin.)
Mark it in your personal log book. Show your granchildren. Boast at cocktail parties.
Stay away from people who may be affected by low pressure.
