Weather Stuff

29 flashcards · Other · by theTisch21

1. Surface analysis

   Observation, 3hr

2. Weather depiction

   Observation, 3hr

3. Radar summary

   Observation, 30min

4. Constant pressure chart

   Every 6hr, valid 24hr

5. Low level sig WX prognostic

   Every 6 hrs, valid 24hr

6. Surface sig WX chart

   Every 6hrs, valid 24hr

7. Convective outlook 1 day

   5x a day, valid until 1200Z next day

8. Convective outlook 2 day

   2x a day

9. Convective outlook 3 day

   1x a day

10. Graphic Winds aloft (first 12hr)

    1hr

11. Graphic Winds aloft (12-66hr)

    every 6hr

12. Aviation surface forecast

    Every 3hrs, up to 18hrs

13. Aviation cloud forecast

    Every 3hrs, up to 18hrs

14. METAR

    Obs, hourly

15. TAF

    every 6hr, valid 24

16. Airmet

    Every 6hr, valid 6hr

17. Sigmet

    As needed for 4 hours

18. Convective sigmet

    Hourly, for 2 hours

19. Winds aloft

    Every 12hr, as noted

20. CWA

    As needed, for 2 hours

21. PIREP

    As needed, obs

22. Fog acronym

    AVSURF

23. Radiation fog

    Over land when radiational cooling reduces air temp to below dewpoint

24. Valley/Mountain

    Ground cools, heat released. Dense cool air from mountains sinks into valleys. Cold air saturates into fog.

25. Advection

    Moist air moves over cold surface, cools below dewpoint. <15kts generally

26. Upslope

    Moist air lifted up and cools down

27. Frontal

    Moist air lifted up over a front, precipitates, evaporating precip saturates air, fog

28. Steam

    Very cold air over warm water, enough moisture may evaporate to saturate. As it meets cold air, recondenses into fog

29. Atmospheric composition

    78% N2, 21% O2, 1% trace