Radar Summary Charts

CHAPTER TWO

METEOROLOGY FLIGHT PLANNING

Figure 2-7 Surface Prognostic Legend

Freezing Level

Freezing level height contours are drawn on the charts for every 4000 foot interval. These

contours are labeled in hundreds of feet MSL. The surface freezing level, however, is labeled

SFC. An upper-level freezing contour crossing the surface freezing level line indicates multiple

freezing levels due to an intermediate temperature inversion. Areas of structural icing are not

specifically outlined on this chart, but icing can be inferred in clouds or precipitation above the

freezing level.

206.

RADAR SUMMARY CHARTS

The Radar Summary Chart (Figure 2-7) is a computer-produced facsimile presentation based on

radar observations of echo activity (thunderstorms, rain, sleet, etc.). The Radar Summary Chart

is used in flight planning to provide pilots with a pictorial display of echo activity along their

planned route of flight. This chart is transmitted on a variable schedule, and the date-time group

reflects the time the radar observations were taken.

2-8 DATA DISPLAYED ON WEATHER IMAGERY PRODUCTS