Fig. [21]. The Southwest Storm Warning. A white pennant below a square red flag with black center displayed by day, or a white lantern below a red lantern displayed by night (Fig. [21A]), indicates the approach of a storm of marked violence, with winds beginning from the southwest.

Fig. 24

Fig. [22]. The Northwest Storm Warning. A white pennant above a square red flag with black center displayed by day, or a white lantern above a red lantern displayed by night (Fig. [22A]), indicates the approach of a storm of marked violence, with winds beginning from the northwest.

Fig. [23]. Hurricane, or Whole Gale Warning. Two square flags, red with black centers, one above the other, displayed by day, or two red lanterns, with a white lantern between, displayed by night (Fig. [23]), indicate the approach of a tropical hurricane, or of one of the extremely severe and dangerous storms which occasionally move across the Great Lakes and Atlantic Coast.

Fig. 25

We have installed at our manufacturing plant a high-class weather station, with equipment of the latest United States Weather Bureau standard pattern, and are able to send out weather signals by wireless from our own wireless station twice daily, at 4 P. M. and 7 P. M., to all boys owning a wireless outfit. The indications are taken from our own instruments. A description of these instruments and the method of recording the indications will give you an insight into how the various government weather stations arrive at their forecasts.

Fig. 26