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Prevailing Visibilty
The new rules being put to good use at Heathrow this morning..
EGLL 040920Z 31001KT 3500 1500W BR BKN040 06/05 Q1029 NOSIG EGLL 040850Z 28001KT 3500 1500W BR FEW000 BKN042 06/05 Q1029 TEMPO 1200 EGLL 040820Z 27002KT 3500 1200W R27L/P1500 R27R/P1500 BCFG BR FEW000 SCT025 BKN042 05/05 Q1029 NOSIG EGLL 040750Z 28003KT 3500 0800W BCFG BR FEW000 BKN038 05/05 Q1029 TEMPO 2000 BR EGLL 040720Z 28003KT 3000 0800W BCFG BR FEW000 SCT002 BKN038 05/05 Q1028 TEMPO 1200 BKN002 EGLL 040650Z 28004KT 4300 2000W BR FEW003 BKN038 05/05 Q1028 TEMPO 1500 BKN003 EGLL 040620Z 27004KT 4700 2300SW BR FEW003 BKN038 05/05 Q1028 TEMPO 1200 BKN002 Prevailing vis strangely not evident in many other obs, most puzzling, *cough*. Jon. |
Prevailing Visibilty
"Jon O'Rourke" wrote in message
... The new rules being put to good use at Heathrow this morning.. EGLL 040920Z 31001KT 3500 1500W BR BKN040 06/05 Q1029 NOSIG EGLL 040850Z 28001KT 3500 1500W BR FEW000 BKN042 06/05 Q1029 TEMPO 1200 EGLL 040820Z 27002KT 3500 1200W R27L/P1500 R27R/P1500 BCFG BR FEW000 SCT025 BKN042 05/05 Q1029 NOSIG EGLL 040750Z 28003KT 3500 0800W BCFG BR FEW000 BKN038 05/05 Q1029 TEMPO 2000 BR EGLL 040720Z 28003KT 3000 0800W BCFG BR FEW000 SCT002 BKN038 05/05 Q1028 TEMPO 1200 BKN002 EGLL 040650Z 28004KT 4300 2000W BR FEW003 BKN038 05/05 Q1028 TEMPO 1500 BKN003 EGLL 040620Z 27004KT 4700 2300SW BR FEW003 BKN038 05/05 Q1028 TEMPO 1200 BKN002 Prevailing vis strangely not evident in many other obs, most puzzling, *cough*. Well it *is* evident, but it looks like many of the observers haven't read the rubric carefully enough. :-) METAR EGNH 290920Z 09005KT 9999 9000E VCFG FEW030 00/M01 Q1022= METAR EGGD 302120Z 10007KT 9999 7000SE BKN063 05/04 Q1009= METAR EGGW 031250Z 21004KT 5000 3000S BR SCT076 04/04 Q1022= METAR EGFF 041320Z 25008KT 9999 8000N FEW007 SCT008 BKN016 10/09 Q1030= The directional vis should only be reported if less than 50% of the prev vis, or 1500 m. An early issue at EGLL EGLL 281550Z 33008KT 290V010 9999 7000NW -RADZ FEW009 SCT012 OVC020 06/04 Q1011 TEMPO 4000 BKN009= but nothing naughty since. I doubt the world will come to an end if unnecessary extra vis fields are included! Julian |
Prevailing Visibility
"Julian Scarfe" wrote in message ... snip Well it *is* evident, but it looks like many of the observers haven't read the rubric carefully enough. :-) I've seen few, but not many and I'm sure it's not being used on 99% of occasions when it should be (Heathrow excluded). Although I should add that there's still quite a few airfields (like Gatwick IIRC) who have yet to switch to the new practice. METAR EGNH 290920Z 09005KT 9999 9000E VCFG FEW030 00/M01 Q1022= METAR EGGD 302120Z 10007KT 9999 7000SE BKN063 05/04 Q1009= METAR EGGW 031250Z 21004KT 5000 3000S BR SCT076 04/04 Q1022= METAR EGFF 041320Z 25008KT 9999 8000N FEW007 SCT008 BKN016 10/09 Q1030= The directional vis should only be reported if less than 50% of the prev vis, or 1500 m. Oh dear. An early issue at EGLL EGLL 281550Z 33008KT 290V010 9999 7000NW -RADZ FEW009 SCT012 OVC020 06/04 Q1011 TEMPO 4000 BKN009= but nothing naughty since. I doubt the world will come to an end if unnecessary extra vis fields are included! Probably not, but I suspect additional vis filelds will be the exception rather than the rule at most airfields. Not least because the equipment only provides a single vis and the lower directional vis requires a look out the window.. allegedly ;-P Jon. |
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