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Chapter 2 - Chapter 2 Meteorological Measurements ATOC 1050...

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Chapter 2 – Meteorological Measurements ATOC 1050 I. Two main ways to predict severe and hazardous weather: A. Numerical modeling (discussed in Chapter 4) B. Analyses of measurements 1. Synoptic scale measurements taken on routine basis at same time. What is “synoptic scale”? 2. Use UTC time (Universal Coordinated Time) also called GMT (Greenwich Mean Time) also called Z (Zulu) time a. 24 hour “clocks” b. In Boulder (Mountain time zone), subtract 7 hours for Standard Time and 6 hours for Daylight Savings Time to convert local Boulder time to UTC/GMT/Z time 1). 1200UTC is what time here in Boulder? (5:00AM MST; 6:00AM MDT) 2). 000UTC is what time here in Boulder? (5:00PM MST; 6:00PM MDT) c. Radiosondes/Rawinsondes launched at 1200UTC and 0000UTC everyday day. c. What are radiosondes and rawinsondes? C. Surface measurements 1. Nonautomated measurements taken every 3 hours (0000Z, 0300Z, etc.) 2. Automated systems work continuously 24 hours a day (unless they break down) a). NWS (National Weather Service) has ASOS (Automated Surface Observing Systems) b). FAA (Federal Aviation Administration) has AWOS (Automated Weather Observing System) 1
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c). Automated systems record temperature, cloud type and height,
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  • Spring '06
  • FORREST,BE
  • Universal Time, Greenwich Mean Time, Time zone, Daylight saving time, local Boulder time, Meteorological Measurements ATOC

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