The phrase "weather bureau" refers to an organization or government agency that is responsible for studying and predicting weather conditions. Full definition
The state weather bureau said Haiyan was expected to move past the Philippines on Saturday and out over the South China Sea, where it could strengthen even further and hit Vietnam. (scientificamerican.com)
Typhoon Ferdie intensifies further as it continues to move west northwest, state weather bureau PAGASA said. (petesgrillandpizza.com)
The national weather bureaus were correcting this problem by the 1860s by placing thermometers inside vented wooden boxes called screens, which blocked sunlight but allowed air to circulate through gaps — a method still used today. (discovermagazine.com)