METAR history
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METAR history
I've got several links to sites which give you the current METAR/TAF but what I'm after is a site which will give you previous METARs.
Something like a list of the last 24 hours etc.
Thanks,
H-D
Something like a list of the last 24 hours etc.
Thanks,
H-D
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That is a question nobody has been able to answer to me.
Actually it can not be the pressure at the airport. Take a look at this METAR from Denver International.
KDEN 142153Z 02013G16KT 10SM SCT090 BKN140 BKN220 34/M04 A2999 RMK AO2 SLP061 T03391044
It says the altimeter setting is 29.99 inches of mercury. We all know that altimeter setting ( or QNH) is the station pressure corrected to sea level. Station pressure is called QFE and in the case of Denver (5200 feet MSL) it would be somewhere around 24 inches of mercury or 870 milibars. It is impossible to have 29.99 at 5200 feet ( field elevation).
If you continue reading, in the remarks section it says SLP (Sea level Pressure) 061, which means 1006.1 milibars or hectopascals. And that, of course, it is not the conversion from 29.99 inches.
So what does SLP mean in US Metars?
AC00-45 Aviation Weather Services say "some stations include the sea-level-pressure, which is different from altimeter".
Actually it can not be the pressure at the airport. Take a look at this METAR from Denver International.
KDEN 142153Z 02013G16KT 10SM SCT090 BKN140 BKN220 34/M04 A2999 RMK AO2 SLP061 T03391044
It says the altimeter setting is 29.99 inches of mercury. We all know that altimeter setting ( or QNH) is the station pressure corrected to sea level. Station pressure is called QFE and in the case of Denver (5200 feet MSL) it would be somewhere around 24 inches of mercury or 870 milibars. It is impossible to have 29.99 at 5200 feet ( field elevation).
If you continue reading, in the remarks section it says SLP (Sea level Pressure) 061, which means 1006.1 milibars or hectopascals. And that, of course, it is not the conversion from 29.99 inches.
So what does SLP mean in US Metars?
AC00-45 Aviation Weather Services say "some stations include the sea-level-pressure, which is different from altimeter".
One of the most useful sites for past information is
Plymouth State Weather Center 24-HR Surface Station Summary Generator
Plymouth State Weather Center 24-HR Surface Station Summary Generator
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If A29.99 is set on the aircraft altimeter at the time of the observation then the altimeter will read the airport elevation not zero or any other number, so it is the pressure at the airport. And we all know SLP is sea level pressure.
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helen from Hades
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Quick way is go to Welcome to Weather Underground : Weather Underground (.wunderground.com) input location (pref 4 ltr code) & you can get historical Metars for any location that publishes same. I find this quicker than going through the main met databases/offices preamble is faster.
?Quick way is go to Welcome to Weather Underground : Weather Underground (.wunderground.com) input location (pref 4 ltr code) & you can get historical Metars for any location that publishes same. I find this quicker than going through the main met databases/offices preamble is faster.
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Originally Posted by Dufo
One of the most useful sites for past information is
Plymouth State Weather Center 24-HR Surface Station Summary Generator
Plymouth State Weather Center 24-HR Surface Station Summary Generator
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WX Support gives METAR history, not for 24 hours, but the last 5, quite nice showing recent trends. I use it a lot.
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One option here:
Observations EGLL Centre Meteo Montreal
Above is an example, Heathrow for the previous 48 hours. For any other airport edit the ICAO code in the url. '048' is hours back which can also be edited.
Also this site: Formulario para peticion de mensajes aeronauticos
Observations EGLL Centre Meteo Montreal
Above is an example, Heathrow for the previous 48 hours. For any other airport edit the ICAO code in the url. '048' is hours back which can also be edited.
Also this site: Formulario para peticion de mensajes aeronauticos
University of Wyoming site here works pretty well, interactive map etc......
Station Observations
Also allows you to look back up to a month, choose date/time etc
Station Observations
Also allows you to look back up to a month, choose date/time etc
Last edited by farsouth; 16th Jul 2008 at 09:28. Reason: added information
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Internet Weather Source from the NWS and NOAA gives current METAR and past 24 hour summary.
IWS International Weather Conditions
VRSC
IWS International Weather Conditions
VRSC
