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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#1
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I'm sure this has been asked before, but I can't find it on Google,
so... is there a website anywhere with a TAF decoder? I don't just mean a key to the symbols, but somewhere where you can take a TAF string, put it in a box, press a button and get an English translation. I know programs exist to do this - I just can't find one! -- Above address *is* valid - but snip spamtrap to get me to *read*! Support the world's oldest motorsport venue! http://www.shelsley-walsh.co.uk/future.html |
#2
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David Buttery wrote here on 23
Feb 2004: I'm sure this has been asked before, but I can't find it on Google, so... is there a website anywhere with a TAF decoder? snip Ah, never mind, I think I've more or less got the hang of it now - to keep things on topic, here's a recent one with (I hope!) a correct translation: EGBB 241038Z 241812 34008KT 9999 SCT030 TEMPO 1823 8000 -RA BKN012 PROB40 TEMPO 1823 4000 -RASN BKN008 Birmingham Airport, issued 24th (ie today) at 10:38z. Valid from 18:00 tonight to 12:00 tomorrow. Wind 8 kts from bearing 340 degrees. Visibility more than 10km. Scattered clouds 3000 feet. Between 18:00 and 23:00 a 30-50% chance of visibility reducing to 8000 metres with light rain and broken cloud at 1200 feet, and also a 30-50% chance of visibility down to 4000 metres with light sleet and broken cloud at 800 feet. -- Above address *is* valid - but snip spamtrap to get me to *read*! Support the world's oldest motorsport venue! http://www.shelsley-walsh.co.uk/future.html |
#3
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David Buttery wrote here on 24
Feb 2004: Ah, never mind, I think I've more or less got the hang of it now - to keep things on topic, here's a recent one with (I hope!) a correct translation Well, nearly correct - I'd read it as having two PROB40s instead of only one. :-S -- Above address *is* valid - but snip spamtrap to get me to *read*! Support the world's oldest motorsport venue! http://www.shelsley-walsh.co.uk/future.html |
#4
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"David Buttery" wrote in message
Snip Ah, never mind, I think I've more or less got the hang of it now - to keep things on topic, here's a recent one with (I hope!) a correct translation: EGBB 241038Z 241812 34008KT 9999 SCT030 TEMPO 1823 8000 -RA BKN012 PROB40 TEMPO 1823 4000 -RASN BKN008 Birmingham Airport, issued 24th (ie today) at 10:38z. Valid from 18:00 tonight to 12:00 tomorrow. Wind 8 kts from bearing 340 degrees. Visibility more than 10km. Scattered clouds 3000 feet. Between 18:00 and 23:00 a 30-50% chance of visibility reducing to 8000 metres with light rain and broken cloud at 1200 feet, and also a 30-50% chance of visibility down to 4000 metres with light sleet and broken cloud at 800 feet. Well in the case of the first TEMPO there's no PROB, so the forecast conditions should occur as defined in the UK AIP :- "The change indicator TEMPO followed by a four figure time group indicates a period of temporary fluctuations to the forecast meteorological conditions which may occur at any time during the period given. The conditions following these groups are expected to last less than one hour each instance and in aggregate less than half the period indicated." PROB40 means the probability of occurance is 40%, PROB30 - 30%, there are no other PROBs in use. Jon. -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#5
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"David Buttery" wrote in message
David Buttery wrote here on 24 Feb 2004: Ah, never mind, I think I've more or less got the hang of it now - to keep things on topic, here's a recent one with (I hope!) a correct translation Well, nearly correct - I'd read it as having two PROB40s instead of only one. :-S Ahh, you beat me to it while I was ploughing through the not very exciting Aeronautical Information Package ! Jon. -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#6
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"Jon O Rourke" wrote here on 24 Feb 2004:
snip PROB40 means the probability of occurance is 40%, PROB30 - 30%, there are no other PROBs in use. Jon. Thanks. Actually, I was going to put a straight 40%, but this page: http://www.crh.noaa.gov/lot/aviation/tafcode.html says: "The PROB40 group is used when the occurrence of thunderstorms or precipitation is in the 30% to less than 50% range" - and so I changed my own translation to 30-50%. -- Above address *is* valid - but snip spamtrap to get me to *read*! Support the world's oldest motorsport venue! http://www.shelsley-walsh.co.uk/future.html |
#7
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"David Buttery" wrote in message
snip Thanks. Actually, I was going to put a straight 40%, but this page: http://www.crh.noaa.gov/lot/aviation/tafcode.html says: "The PROB40 group is used when the occurrence of thunderstorms or precipitation is in the 30% to less than 50% range" - and so I changed my own translation to 30-50%. Interesting. All I can say is that they do things a little differently across the pond... Also on that page is this statement "PROB40 will not be shown during the first six hours of a forecast." I'd like to see the verification figures ! They also tend to use FM a lot rather than BECMG (min 2 hour period, max 4) eg :- (New York) KJFK 170914Z 170913 03021G32KT 6SM -RA BR OVC012 TEMPO 0913 3SM RA BR OVC008 FM1400 02013G20KT 5SM -RA BR OVC012 FM2100 36011KT 5SM -RA BR OVC020 FM0400 34009KT 5SM -RA BR OVC015 I've yet to reach that level of accuracy ;-) Jon. -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#8
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![]() I'm sure this has been asked before, but I can't find it on Google, so... is there a website anywhere with a TAF decoder? snip You will get the hang of it if you think of it as a "foreign language" . I did of course spent a whole career reading Tafs and Metars and nowadays never consciously translate - I just "read" and my warped brain interprets the meanings without any actual intermediate process. I must say the one aspect that still never comes naturally though is all this SCT, BKN, etc. Why on earth they didn't stick to oktas is one of life's mysteries. I believe it's something to do with the American influence where they use (or used to use) tenths and they wanted to make the whole world use the same system (or something like that) Jack |
#9
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![]() "Jon O Rourke" I've yet to reach that level of accuracy ;-) When I was based at RAF Strubby, we had a wonderful met man called Max Mekin (a Pole or a Czech - not too sure of the spelling of his name) Max would say something like: "The cold font. He is due at 1020 ...... maybe 1025" and damn me, Max was usually right. Jack |
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