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Forecast Products

Weather

 


 

Cartoon: Weather Briefing, from There I was, used in Weather Forecast Products.

High-level Significant Weather Progs

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  • Box in corner shows where the forecast came from, the valid times, and the altitudes covered.
  • Provide locations of thunderstorms in scalloped areas.
  • Provide coverage of thunderstorms — each area has a box which shows the type, coverage, and altitudes of that area. For example, "ISOL EMBD CB 280 XXX" indicates an isolated thunderstorm embedded in other cloud layers with tops at FL 280 and bases below the chart's coverage of FL 250.
  • Provide heights of tops and bases, generally starting at FL250.
  • Available at: http://www.aviationweather.gov/products/swh/.

Mid-level Significant Weather Progs (FLs 100 through 250)

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  • Box in corner shows where the forecast came from, the valid times, and the altitudes covered.
  • Provide locations of thunderstorms in scalloped areas.
  • Provide coverage of thunderstorms — each area has a box which shows the type, coverage, and altitudes of that area. For example, "ISOL EMBD CB XXX XXX" indicates an isolated thunderstorm embedded in other cloud layers with tops above FL 250 and bases below FL 100.
  • Provide heights of tops and bases, generally between FL 100 and FL250.
  • Available at: http://www.aviationweather.gov/products/swm/

Surface Progs

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Tropical Weather System Forecast Charts

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  • Show forecast track and positions of tropical weather systems.
  • The shaded area shows the overall area for the storm.
  • Each dot shows the forecast position of the center for the time indicated and the intensity.

National Convective Weather Forecast Charts

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Collaborative Convective Forecast Products (USA only)

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  • Forecasters collaborate with air traffic system, airport management and scheduled carrier operations personnel to publish the CCFP.
  • Provide heights of tops, growth (increasing or decreasing intensity), confidence and coverage of storms.
  • Provides charts for 4, 6, and 8 hours out.
  • Available at: http://www.aviationweather.gov/products/ccfp/.

SIGMETs

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  • "Significant Meteorological Information"
  • Criteria for international SIGMETS are specified by ICAO and WMO
  • Criteria for national SIGMETs are specified by respective national meteorological services.
  • SIGMETs are generally issued for thunderstorms and tropical cyclones.
  • Non-convective weather SIGMETs are also issued.
  • Available at: http://www.aviationweather.gov/adds/airmets/.

Aviation Area Forecasts

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  • Are issued by several (not all) nations.
  • Provide greater detail than high-level and mid-level significant sig weather progs.
  • Contain information additional to convective weather.
  • Available at: http://www.aviationweather.gov/products/fa/.

Tropical Weather System Forecast Bulletins

  • These are more detailed than tropical weather system forecast charts.
  • Provide 12, 24 and 36 hour forecast with wind distribution.

Terminal Aerodrome Forecasts (TAFs)

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References

14 CFR 91, Title 14: Aeronautics and Space, General Operating and Flight Rules, Federal Aviation Administration, Department of Transportation

14 CFR 135, Title 14: Aeronautics and Space, Operating Requirements: Commuter and On Demand Operations and Rules Governing Persons on Board Such Aircraft, Federal Aviation Administration, Department of Transportation

Aeronautical Information Manual

"There I was..." 25 Years, Bob Stevens, 1992

Revision: 20120101
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