Introduction
Weather doesn’t recognize geographic or political borders. In a rare example of international cooperation, the majority of countries with a national weather forecasting agency readily share their observations and forecasts. In order to coordinate the timing of observations and forecasts, meteorologists adhere to a standard timekeeping system.
The original standard timekeeping system was Greenwich Mean Time (GMT), a 24-hour clock system based on the local time on the prime meridian in Greenwich, England. Since the local time in Greenwich is the same at GMT, 1:00 am is 0100 GMT, noon is 1200 GMT, and 6:00 pm is 18 GMT. Continue reading