8 THE WEATHER 



BLASTS INDICATE 



One long Fair weather. 



Two long Rain or snow. 



Three long Local rains. 



One short Lower temperature. 



Two short Higher temperature. 



Three short Cold wave. 



Interpretation of Combination Blasts 



One long, alone Fair weather, stationary temperature. 



Two long, alone Rain or snow, stationary temperature. 



One long and short .... Fair weather, lower temperature. 



Two long and two short . . . Rain or snow, higher temperature. 



One long and three short . . Fair weather, cold wave. 



Three long and two short . . Local rains, higher temperature. 



By repeating each combination a few times, with an interval of ten 

 seconds between, possibilities of error in reading the forecasts will be 

 avoided, such as may arise from variable winds, or failure to hear the 

 warning signal. 



Canadian signals (Fig. 3) 



1234 

 FIG. 3. Canadian storm warnings. 



No. 1, gale at first from an east- No. 3, heavy gale at first from 



erly direction. an easterly direction. 



No. 2, gale at first from a west- No. 4, heavy gale at first from 



erly direction. a westerly direction. 



The night signal corresponding to Nos. 1 and 3 is a red light. 

 Night signal corresponding to Nos. 2 and 4 is a white light above a 

 red light. 



