I am trying to use METAR data from AviationWeather.gov to programmatically collect hourly rainfall data. This Wiki says that the first field in the report should be "type" - either METAR or SPECI.

2024年9月27日 · The ASOS transmits an official meteorological aerodrome report (known as a METAR) at 53 minutes past each hour and a special weather observation (known as a SPECI) as conditions warrant; such conditions include a wind shift, change in visibility, and change in ceiling (cloud cover or height).

2023年12月21日 · What exactly is the difference between RA, SHRA and TSRA in METAR and TAF reports? I couldn't find a source where they were all compared together.

Here is an actual METAR example: KOMA 190352Z 36017G26KT 3SM -SN OVC012 M08/M11 A3014 RMK AO2 PK WND 36027/0302 FZDZE37SNB27 SLP220 P0000 I1001 T10831111 $ What does the I1001 mean? I have also seen I1000, I1002, I1003, and I1004.

2021年3月8日 · I was wondering how long is the METAR report valid for after issuance? I know some airports issue them every 30 minutes and some every hour. So I wanted to know if a METAR is issued at 8:30AM then will it be valid till next Metar report i.e. 9:00AM or is it just valid for 10-15 minutes after that ?

2020年12月7日 · The term 27/10 is the temperature (27°C) and dew point (10°C). The RF term in the remark section is used to indicate the accumulated rainfall (in this case 0, so no rain): What is the meaning of the RF group in METAR/SPECI and TTF? This group reports rainfall in the last ten minutes and accumulated rainfall since 0900 local. For example, RF02.2/024.4 reports that …

2017年4月5日 · The general rule is: If you read it, it's true. If you hear it, it's magnetic. All charts and textual sources (METAR, TAF, winds aloft, surface analysis charts, etc) use true north as the reference. ATIS/AWOS/ASOS broadcasts, or any information a controller gives you over the radio, is magnetic. Wind direction broadcast over FAA radios is in reference to magnetic north. …

2017年6月1日 · Regarding variable wind direction in METAR reports, what are the criteria for VARIABLE when the authority uses "VRB"? An Advisory Circular mentions the authority uses "V" when the wind direction varies by 60 degrees.

2017年10月9日 · This is a METAR with the addition of U.S. Observations, and according to the details of the abbreviations used there is no such value as DSPTD. I suspect you are right, that it should have been DSIPTG - which does indeed mean "dissipating". The full decode of the Remarks section of your example METAR is as follows A02 - automated station with …

2015年9月26日 · What doesn't appear to be defined is exactly what area the METAR covers. It's understood that a METAR is a reporting for a particular station's current conditions at a particular time, but is there a more discrete definition for where the METAR's conditions can be expected?