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