• No
information— If information is not reported, the chart will
say “NA.” If no echoes are detected, the chart will say “NE.”
• Precipitation intensity contours— Intensity can be
described as one of six levels and is shown on the chart by
three contour intervals.
• Height of tops— The heights of the echo tops are given
in hundreds of feet MSL.
• Movement of cells— Individual cell movement is
indicated by an arrow pointing in the direction of movement. The
speed of movement in knots is the number at the top of the arrow
head. “LM” indicates little movement
.
• Type of precipitation—The type of precipitation is
marked on the chart using specific symbols. These symbols are
not the same as used on the METAR charts.
• Echo configuration—Echoes are shown as being areas,
cells, or lines.
• Weather watches— Severe weather watch areas for
tornadoes and severe thunderstorms aredepicted by
