The reason that the storm's actions were confined to 

 Southern California was the fact that an immense area of high 

 pressure to the eastward acted as a mighty bolster. This 

 high area also provided masses of cold air thousands of miles 

 in area to affect, by its immensity, the nearly saturated air of 

 this district. 



The reasons why the region about Los Angeles and Pasa- 

 dena and neighboring towns received much heavier rainfall 



^onn No. loi«— Met'L 



(Station) 



U. S. DEPARTMENT OF AGRICULTURE, WEATHER BUREAU. 



DAILY LOCAL RECORD. 



LOB Angeles, Cal. ( Day of week) .}i°riiaT_ _ , rBaie) .'eo^ary 24, 



, 191% 



i/'<'^ storm southwest signala flying at Avalon, 



San Pedro, Radondo, 

 Venice ;ho--sted aim- 

 set Feb. 23d. 



Prepared by ^-25. S- y 

 reriftedby)y'J3l./T -^^"^ 



Meteorological conditions accompanying the heavy rain of Feb. 24, 1913. 

 (Copy of the daily local record for that date.) 



than Redlands or Riverside is. first, because the storm's track 

 left these latter places on the dry side of the area of low pres- 

 sure ; second, because the region about Los Angeles was en- 

 veloped in an atmosphere having in possession and recourse 

 to, a great amount of moist air necessary to the production of 

 rain. This was not the case at Redlands or Riverside as the 

 relative humidity at these places was low and the air dry and 



5 



