New York Weather Bureau. 273^ 



27th. All of these disturbances, and especially the extensiA^e- 

 areas of the 5th, 17th and 27th brought southerly winds and in- 

 creased temperatures; but a contrary effect was produced by a 

 cyclone which passed northward over the Atlantic on the 13th. 

 The sharply defined low which passed over Canada on the 5th, 

 with a central pressure of 29.4 inches, gave the greatest average 

 precipitation and wind velocity of the month. The storm of the 

 30th brought the first considerable snowfall of the season in the 

 Atlantic Coast Region. 



The anticyclonic systems were generally large and strongly 

 developed. Their usual path was from the western to the central 

 or southern States, thence spreading alo'ng the Atlantic Coast 

 line. After the 14th a nearly permanent area of very high ba- 

 rometer was maintained in the extreme northwest; and from it 

 the successive waves of high pressure passing eastward became 

 detached. Owing to the southerly trend of the highs, they tended, 

 as a rule, to reinforce the action of the cyclonic areas in giving 

 warm southerly winds over this vicinity; but the cold wave of the 

 20th wa® due to a different condition; the high pressure in that 

 case spreading along the Canadian border, and developing a 

 pressure of 30.7 inches over northern New York. At the close of 

 the month the high pressure system in the northwest developed 

 great intensity, extending to the Atlantic coast, and bringing 

 the coldest weather of the month in this vicinity. 



18 



