308 



GENERAL TOPICS. 



II. MISCELLANEOUS SUBJECTS AND 

 TABLES. 



E:S PLANATION OF THE FFjAG SIGNALS ADOPTED 

 BY THE UNITED STATES WEATHER BUREAU. 



The U. S. Weather Bureau furnishes, when practicable, 

 for the benefit of the general public and those interests de- 

 pendent to a greater or less extent upon weather condi- 

 tions, the " Forecasts " which are prepared daily, at 

 lO A.M. and lo p.m., for the following day. These weather 

 forecasts are telegraphed to observers at stations of the 

 Weather Bureau, railway officials, and many others, 

 and are so worded as to be readily communicated to the 

 public by means of flags or steam whistles. The flags 

 adopted for this purpose are five in number, and of the 

 form and dimensions indicated below: 



Weather Flags. 



No. 3. 

 No. I. No. 2. White and Blue 



White Flag. Blue Flag. Flag. 



No 4. No. <;. 



Black Tri- White Flag 

 angular with black 

 Flag. square in centre. 



Clear or fair Rain or snow. Local rains 

 weather. or snow 



^ 



Temperature 



signal. 



Cold wave. 



Interpretation of Displays. 



No. I, alone : fair weather, stationary temperature. 

 No. 2, alone : rain or snow, stationary temperature. 

 No. 3, alone : local rain or snow, stationary temperature. 

 No. I, with No. 4 above it : fair weather, warmer. 

 No. I, with No. 4 below it : fair weather, colder. 



