New York Weather Bureau. 153 



coast stations; on the 23d at Angelica; on the 2-itli at 10 

 stations in the northwest, 5 near the Central Lakes, and at St. 

 Johnsville; on the 29th at Jamestown and Franklinville; on 

 the 30th at 8 stations of the southern and southeastern counties. 



Hail fell on the 1st, 8d, 13th and 15th. 



Auroras were reported on the 22d and 27th. 



Lunar halos were observed on the 6th and 11th. 



Light frosts occurred in western and northern New York 

 on the 1st and 2d. Killing frosts occurred on the 21st and 

 22d in the vicinity of Allega^iy county, and light frosts were 

 generally reported, except in the Coast Kegion. 



General Features or the Weather. 



This month was exceptionally cool, the temperature rising to, or 

 above, the normal only on the 3d and -Ith and the 23d to 25th. 

 The principal cold periods occurred about the 2d and 21st, with 

 daily temperatures 15 degrees below normal, and severe frosts in 

 the southwest and also in some northern localities. The rainfall 

 was greater than usual in much of the eastern and central sections, 

 but much lighter in the west. About the usual rain frequency and 

 cloudiness obtained for the State at large, fair weather prevailing 

 generally after the 10th. The continued low temperature kept 

 vegetation in a backward condition throughout the mouth. 



Seven areas of high pressure, and the same number of depres- 

 sions, influenced our weather this month. The lows were of small 

 intensity, usually developing and moving eastward near or beyond 

 the Canadian border, broadening out when over the northeastern 

 States and coast. The highs were large but ill-defined areas, whose 

 maximum pressures were usually under 30.3 inches. The follow- 

 ing is a brief account of the pressure systems of the month : 



High I, 30.2 inches over the Upper Lakes on the 1st, high winds 

 into a low (the last of May) on the northeast coast. The high 

 pressure over New York to the Central Coast on the 2d, giving 

 clear weather, and on the 3d to the southeast coast, forcing warm 

 southerly winds into . 



Low I, 29.7-29.9 inches, over the Upper Lakes on the 3d, 

 spreading over Canada on the three days following, giving thun- 

 derstorms or showers, heaviest in the east. 



