128 Eighth Annual Report of the 



Light frosts occurred on the 1st, 2d, 3d, 6th, Tth, 8th, 12th, 13th, 

 14th, 16th and 20th. 



The weather of May was characterized by the deficient rainfall, 

 the rapid and great changes in temperature and the high general 

 monthly mean. From the 1st to the 19th the mean temperature 

 was continuously above normal for the season, the average excess 

 being about 9 degrees. The period of greatest departure was 

 from the 9th to the 11th inclusive, the warmest day being the 10th 

 with station means ranging from 70 to 80 degrees and the general 

 mean for the State of 73 degrees, or about 19 degrees above the 

 normal for this date. A maximum temperature of 95 degrees 

 occurred on the 10th and 11th. The principal depressions of tem- 

 perature occurred on the 20th, with general light frosts over the 

 State, and on the 29th to 31sft, the mean for the latter dates being 

 slightly below normal. The general mean for the last third of 

 the month was slightly in excess of the normal value. 



The principal periods of rainfall were on the 17th to 19th and 

 26th to the close of the month, accompanied by severe thunder- 

 storms, destructive hail in restricted areas, and high winds along 

 Lake Ontario and the St. Lawrence Vallej'. Though rain fre- 

 quency was but slightly less than usual, the precipitation was gen- 

 erally very light until the latter part of the month. 



About the usual number of cyclonic storms for May affected 

 weather conditions in New York. With the exception of those 

 which passed in this region on the 18th, 26lh and 2Sth-29th, the 

 storms were of very moderate intensity and all passed centrally 

 north of New York State. The storm of the 28th moved rapidly 

 from the southwest increasing in energy and passed centrally over 

 the Great Lake Region and the St. Lawrence Valley, developing 

 severe thunderstorms with general and the heaviest rains of the 



