41. Other countries followed the lead of the United States in taking simultaneous weather observations , starting in 1873. 42. Coastal weather observations are also updated hourly. 43. Also located at the airport is the Automatic Weather Station, an important western Tasmania weather observation point. 44. The squadron trained indigenous weather personnel and set up the clandestine weather observation networks throughout Southeast Asia. 45. Eitel-Friedrich Kentrat and the weather observation ship. 46. This approach relied on physical principles for analyzing weather fronts and air masses and not simply weather observations . 47. Since the mid-1800s, farmers and everyday folk have been organized to make weather observations with the Smithsonian Institution. 48. For more than a decade, most official weather observations taken at airports around the nation have been automated. 49. San Francisco has continuous weather observations dating back to 1949, one of the longest periods in the nation. 50. The 19th century saw modest progress in the field after weather observation networks were formed across broad regions.
