A standard briefing includes area forecasts, convective SIGMETS, center weather advisories, AIRMETs, SIGMETs, METARs
, PIREPs, TAFs, Winds Aloft and NOTAMs.
Since ceiling is measured with respect to ground level, the interpolation of ceiling must account for the elevation of the reporting METAR
station and the variation of terrain height between stations.
The official location for current METAR
data reported through GTS is http://weather.
SPECIs must be generated whenever we or the system observe a weather change that meets a certain criteria and happens outside of the 47-52 minute METAR
It has the same map layers as you'll find in the Mobile app, plus it overlays weather radar, TFRs, METARs
, AIRMETs, SIGMETs and satellite imagery.
Although the world gradually warmed up to METAR
and TAF formats by 1970, the United States, Canada, and Mexico were locked in their ways and continued doing things like they had since the 1930s, using "SAO" (surface airways observation) format.
This includes an excellent TAF viewer and viewers for METARs
, SIGMETS, AIRMETS and PIREPs.
Since its measurements are directly vertical above the unit, the ceiling in the rest of the vicinity may well be above the 200 feet showing on the METAR
But the METAR
also appears in this list and lets you call up TAFs and PIREPs.
RIGHT: XM weather radar, satellite and METAR
coverage is sparse, with the inset showing actual data available to forecasters.
However, you can get color-coded METAR
circles on any moving map.
You select the METAR
, Radar, and Strike products (Figure 5).