Weather Map Encoding Scheme

Explains how to understand some of the colors and figures found on standard meteorological maps. i.e. Surface maps, upper air maps, and radar summary charts.

Surface:

    Blue High Pressure Blue Cold Fronts Blue Cold Frontogenesis and frontolysis Red Low Pressure Red Warm Fronts Red Warm Frontogenesis and frontolysis Red/Blue Stationary Fronts Purple Occluded Fronts Purple Occluded frontolysis Purple Squall Lines Black Trough Green Shade precipitation areal coverage Yellow Stations with vision obstructions

850 mb and 700 mb analysis:

    Blue High geopotential centers Blue Height rises in +50 meter intervals Red Low geopotential centers Red Hight falls in -50 meter intervals Black Troughs or Waves Yellow A significant isotherm Orange Arrows indicating winds >= 30 kts Green Shade areas of dewpoint depressions of 5 degrees C or less

500 mb analysis:

    Blue High geopotential centers Blue Height rises in +50 meter intervals Red Low geopotential centers Red Height falls in -50 meter intervals Black Troughs Yellow A significant isotherm Orange Arrows indicating winds >= 50 kts Green Shade areas of dewpoint depressions of 5 degrees C or less

300 mb and 200 mb analysis:

    Purple Outline jet streams starting at 70 kts in 20 kt intervals Purple Actual value of wind maximum Orange Arrow indicating jet maximum

500 mb Hemispheric:

    Blue 534 dm geopotential Black 570 dm geopotential

Radar Chart:

    Green Outline all Level 1 Yellow Outline all Level 3 Red Outline and shade all Level 5

University of North Dakota / School of Aerospace Sciences / Atmospheric Science Department

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