Visibility < 3 mi
Visibility 3-5 mi
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Cold front |
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Warm front |
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Stationary front |
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Occluded front |
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Trough |
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Squall line |
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Dry line |
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Tropical wave |
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Isobar |
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Ceiling < 1000' Visibility < 3 mi |
|
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Ceiling 1000-3000' Visibility 3-5 mi |
|
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Moderate or greater turbulence |
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Freezing level at surface |
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Freezing level above mean sea level |
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Area of precipitation |
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Rain: light - moderate - heavy |
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Snow: light - moderate - heavy |
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Thunder: with rain - with snow - without precipitation |
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Shower: rain - snow |
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Drizzle |
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Freezing rain - freezing drizzle |
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Ice pellets or sleet |