| 11. | The National Weather Service said conditions were expected to improve by afternoon.
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| 12. | Timely warnings by the National Weather Service helped minimize the death toll.
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| 13. | The National Weather Service confirmed that one tornado touched down in Owensboro.
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| 14. | The tornado was rated an EF3 by the National Weather Service.
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| 15. | The National Weather Service said the water temperature was 53 degrees.
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| 16. | The National Weather Service issues this measurement on a regular basis.
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| 17. | National Weather Service : http : / / weather . gov
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| 18. | Records for Erie date from 1847, the National Weather Service said.
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| 19. | National Weather Service researcher Bartlett C . Hagemeyer said last week.
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| 20. | The National Weather Service says Oklahoma averages 54 tornadoes a year.
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