51 



the night of March 23 gave a few hours of moderate gales from the 

 Northwest on the 24th. These were the only gales of the month, for 

 the storm of the 31st did not produce anything stronger than a fresh 

 breeze In general the weather was very moderate for March. 



Figure 2.— March weather diagram. Inner figures show day of the montli; the next band out 

 contains the record of the atmospheric pressure; the next outer one indicates the degree of 

 visibility (black areas are for visibility of less than two miles and cro.ss-hatched areas for 

 visibilities between two and four miles); the outer margin shows the average direction and 

 force of wind per 12-hour periods, midnight to noon, and noon to midnight. 



APRIL 



Maximum air temperature, 52° F. 



Minimum air temperature, 30° F. 



Average air temperature, 38.7° F. 



Visibility was less than 4 miles 26 per cent of time. 



Visibility was less than 2 miles 18 per cent of time. 



Fog and poor visibility prevailed during April just about normally; 

 that is, to the average extent that the ice patrol has experienced 

 during the past eight years. There were a number of days of high 

 barometer and fine weather. 



