This paper describes a technique for displaying real-time, rapidly updating geospatial weather data in a Google Earth web interface. Queries may be conducted over the web from a virtual globe client that interacts with a XML web service that caches and provides operations on large geospatial data grids. Queries may be conducted for a specific grid point, for an area defined by a polygon, or along a line, all drawn by the user. "Alarms" may also be set up for real-time data fields exceeding a threshold at a particular location or locations, which alerts the user that the threshold has been exceeded via a pop-up box or email message. Trends of data at a point may also be produced on demand. Input grids include current analyses, historical analyses, and future forecast grids of any meteorological data field.