Station Models - PowerPoint PPT Presentation

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  1. Page 5 Station Models • Allows weather data to be plotted on a map in a condensed & usable format. It shows the current weather conditions for a particular location.

  2. Page 5 Station Models on a Map

  3. Page 5 Keys to Weather Map Symbols 13 What page of the ESRT?

  4. Page 5 Station Model • Purpose: allows data to be plotted in a condensed and usable format • Temperature and Dewpoint are always in Fahrenheit • Wind direction: winds are identified as the direction FROM which they come • Barometric pressure is shortened to a 3-digit number station model code

  5. Weather Variables and Locations Page 5

  6. Temp dewpt Wind Direction • The staff will point the direction the wind is coming from • What is the wind direction in this example? • ANSWER: Northwest or West Northwest Staff

  7. note, it is not on the end of the wind direction staff Wind Speed The coding for the wind speed symbols can be generalized as: half staff about 5 knots full staff about 10 knots these are additive for the total amounts three full staffs=30 knots

  8. Wind Symbols: Speed Calm Less than 5kts 5 kts 10 kts 50 kts

  9. Now You Try It 45kts 15kts 20kts 25kts 30kts 40kts 35kts

  10. Westerly Wind

  11. North Westerly Wind

  12. Southern Wind

  13. On a station model, cloud coverage is described in these forms: no clouds about 60% about 10% about 75% about 80% about 25% completely overcast about 40% sky obscured about 50%

  14. Samples of present weather symbols. rain fog * snow haze slight rain showers , thunderstorm drizzle . ice or snow pellets lightning cloud development not observed

  15. pressure Temp dewpt Current Barometric Pressure

  16. Barometric Pressure is VERY important! average barometric pressure at sea level is 1013.25 mb or 29.92 in. of Hg current barometric pressure is reported to the nearest TENTH BUT, they don’t want to waste space

  17. Pressure Conversion Air pressure (mb) 053 (1005.3) Station model The 500 Rule Below 500 add 10 Above 500 add a 9 and add a decimal before last number 101 1010.1 542 954.2

  18. Page 5 Keys to Weather Map Symbols 13 What page of the ESRT?

  19. Page 5 Lets Practice

  20. What is the pressure? 084 08.4 1008.4 962 96.2 996.2 281 28.1 1028.1 987.5 875 87.5 322 32.2 1032.2

  21. Convert to their short form: 1) 1018.0 ______ 2) 1018.4 ________ 3) 982.2 ______ 4) 975.6 __________ 5) 984.8 ______ 6) 1000.1 _________ 7) 1018.2 _____ 8) 989.1 __________ 9) 988.8 ______ 10) 1011.1 ________ Page 6 180 184 822 756 848 001 182 891 888 111

  22. 206 ________ 281 ________ 080 ________ 168 ________ 888 ________ Page 6 Convert to Long Form 800 _______ 987 _______ 768 _______ 000 _______ 165 _______ 980.0 1020.6 998.7 1028.1 976.8 1008.0 1000.0 1016.8 1016.5 988.8

  23. Station Model Quiz A. Page 6 A. Wind direction ___________ wind speed ___________ cloud cover ___________ temperature ___________ dewpoint ___________ air pressure ___________ pressure change ___________ visibility ___________ Present weather ___________ SE 15knots 50% 002 74ºF 74 72ºF 10 -31\ 1000.2mb 72 -3.1mb .50 10mi NONE

  24. Station Model Quiz B. Page 6 B. Wind direction ___________ wind speed ___________ cloud cover ___________ temperature ___________ dewpoint ___________ air pressure ___________ pressure change ___________ visibility ___________ Present weather ___________ NW 25knots 100% 48 986 48ºF 48ºF 1/2 = -2\ 998.6mb 48 -.2mb ½ mi Fog

  25. Page 7 Construct a Station Model #2

  26. Page 7 Station Model Quiz • 2 • 3 • 4 • 1 • 1