WeatherMatrix ObsMatrix · U.S. & World Weather Observations

Includes every non-U.S. station in NOAA's latest hourly bulk METAR file — the whole worldwide network reporting that hour, not a curated subset. Parsed from raw text by this script, not a pre-decoded feed — unusual or malformed report groups may be skipped for that field, and some stations may show no Location name if they aren't in the airport lookup. Heat Index and Wind Chill are calculated from temperature/dew point/wind, not transmitted directly, and only apply in their respective NWS-defined ranges (Heat Index ≥80°F, Wind Chill ≤50°F with wind >3 mph) — otherwise shown as —.

Decoded from raw FM-12 SYNOP bulletins — primarily NOAA's direct GTS mirror, falling back to Ogimet only if that's unreachable. Wind Gust and a RMK-style Remark are not part of the SYNOP code form and are omitted from this tab. Visibility is decoded from a WMO code table and is approximate. Weather Type is decoded using whichever of WMO's two present-weather tables (4677 manned / 4680 automatic) the station's own report indicates — the two tables assign different meanings to the same numbers. 12Hr/24Hr Precip only populate when a station's reporting period matches exactly (many stations report 6-hr totals instead, which have no dedicated column here). 24Hr Max/Min Temp come from the SYNOP section-3 Tx/Tn groups, which the code form doesn't strictly guarantee are a 24-hour window — treat as best-effort. Rel. Humidity, Heat Index, and Wind Chill are calculated from temperature/dew point/wind, not transmitted directly — treat as estimates. Stations are WMO indices, not NWS site codes, so they are not linked.