Visualizar condiciones atmósfericas globales

Una excelente forma de ver las condiciones atmosféricas de nuestro planeta es visitar earth. Se puede elegir la región que deseemos con el ratón (click + arrastrar), hacer zum con la rueda del ratón, y cambiar la configuración de los datos clickeando en la palabra earth. Allí podemos elegir los datos a ver (vientos, temperatura, etc), la fecha, e incluso podemos cambiar el sistema de proyección. Con un click en cualquier punto de la superficie terrestre obtendremos, además de sus coordenadas, los valores en ese lugar de las variables elegidas. La fuente de los datos son variadas (Global Forecast System, NCEP, US National Weather Service), y los mismos se actualizan cada 3 horas.

El "about" de earth, completo:

earth, a visualization of global weather conditions
forecast by supercomputers
updated every three hours
Community | Facebook, はてブ
Author | Cameron Beccario @cambecc
Source | github.com/cambecc/earth
Modules | D3.js, when.js, backbone.js, node.js
Weather Data | Global Forecast System
NCEP / National Weather Service / NOAA
GRIB Decoder | UCAR/Unidata THREDDS
Geographic Data | Natural Earth
Hosting | Amazon S3, CloudFlare
Font | M+ FONTS
Waterman Butterfly | watermanpolyhedron.com
Earlier Work | Tokyo Wind Map
Inspiration | HINT.FM wind map
atmospheric pressure corresponds roughly to altitude
several pressure layers are meteorologically interesting
they show data assuming the earth is completely smooth
note: 1 hectopascal (hPa) ≡ 1 millibar (mb)
1000 hPa | ~100 m, near sea level conditions
850 hPa | ~1,500 m, planetary boundary, low
700 hPa | ~3,500 m, planetary boundary, high
500 hPa | ~5,000 m, vorticity
250 hPa | ~10,500 m, jet stream
70 hPa | ~17,500 m, stratosphere
10 hPa | ~26,500 m, even more stratosphere
the "Surface" layer represents conditions at ground or water level
this layer follows the contours of mountains, valleys, etc.
overlays show another dimension of data using color
some overlays are valid at a specific height
while others are valid for the entire thickness of the atmosphere
Wind | wind speed at specified height
Temp | temperature at specified height
TPW (Total Precipitable Water) | total amount of water in a column of air
stretching from ground to space
TCW (Total Cloud Water) | total amount of water in clouds
in a column of air from ground to space
MSLP (Mean Sea Level Pressure) | air pressure reduced to sea level

weather data is generated from numerical models
earth.nullschool.net implies no guarantee of accuracy