New York Weather Bureau. 259 



Northeastern States in their eastward course. The atmospheric 

 movements were rapid during the first half of the month, the 

 velocities then decreasing somewhat. The following is a brief 

 account of the pressure systems of October : 



The last depression of September had reached the Northeastern 

 coast by the 1st and was followed by 



High I, 30.T inches, reaching from Canada to the Gulf of Mexico 

 on the 2d, and with maximum pressure over southeastern New 

 Tork on the 3d and 4th, giving severe frosts on the highlands of 

 that section. Light showers on the 2d, mainly along the coast, 

 preceded the advance of the high, fair weather following until 

 the 6th. 



Low I, 29.7 inches, passed over our northern border on the 6th, 

 giving light general rains, while the temperature rose slightly above 

 the normal ; precipitation continued with the advance of a cool 

 wave due to 



High II, 30.2 inches, a broad area which moved from the Central 

 to Eastern States on the 7th and 8th, bringing severe frosts at scat- 

 tered stations. 



Low II, 29.6 inches, passing over Canada on the 9th, raised the 

 temperature slightly, but brought no appreciable rain. 



High III, 30.4 inches, passed from the Missouri Valley section to 

 the Northeastern States on the 9th and 10th, also spreading along 

 the coast. It was accompanied by clear weather and a severe 

 " freeze " in the colder sections. 



Low III, 29.4 inches, a large depression passed over British 

 America and the lake region on the 11th and 12th. The tempera- 

 ture rose about 10 degrees above normal, and the largest general 

 rainfall of the month occurred on the 12th, the heaviest rain falling 

 in the eastern and northern counties. 



