Figure 17 — Winds and Temperatures Aloft Forecast · FAA-CT-8080-2H, p. 2-16
Figure 17 carries the note "TEMPS NEG ABV 24000." Denver's (DEN) entries at 30,000, 34,000, and 39,000 feet are "235347," "236056," and "236262." What does the note tell you about the two-digit temperature at the end of each of these groups?
Why: The "TEMPS NEG ABV 24000" note on Figure 17 means that above 24,000 feet, where temperatures are always below freezing, the forecast drops the explicit +/- sign used at lower altitudes and the two-digit value is understood to be negative — so Denver's 30,000-foot group (235347) decodes to 230° true, 53 knots, -47°C.
Reads the absence of a minus sign as meaning the value is positive; the note states the opposite — above 24,000 feet the sign is dropped because the temperature is always negative.
Invents a dew-point field that does not exist in this forecast product; winds-and-temperatures-aloft forecasts report only wind and temperature, never dew point.