1884.] o/ the Bay of Bengal in 1883. 141 



The information respecting the weather in the Bay is as hithert) 

 meagre. 



The following are the observations taken at the land observatories in 

 the neighboui'hood of the cyclonic disturbance : — 





Barometer at 

 10 A. M. re- 

 duced to sea 

 level. 



Change since 

 10 A. M. previ- 

 ous day. 



Wind direction. 



Velocity in 

 miles per hour 

 since 10 a. m. 

 previous day. 



d 

 o S 



d -tJ 

 O 



Rainfall at 10 

 a. m. preceding 

 24 hours. 





Stations. 



10 A. M. 



4 p.m. 



Weather. 



Nancowry 



Port Blair 



Diamond Island 

 Chittagong ... 

 Tounghoo 



Bassein 



Rangoon 



Mouimein 



Mergui 



29-897 

 29-894 

 29-900 

 29-921 

 29-873? 



29-924 

 29-942 



29-898 

 29-995? 



— •025 



— •042 



— 030 



— •032 



— •107? 



— •017 



— 023 



— •030 

 + -030 ? 



S. W. 



w. 



E.S.E. 

 E.N.E. 



N. W. 



E. S. E. 

 E.S.E. 



N.E. 

 S. S. E. 



S. W. 

 W. S. W. 

 E. S. E. 



N. N. W. 

 N. W. 



S. E. 

 S. S. E. 

 E. S, E. 

 S. S. E. 



8 



7 



10 



1 

 ? 



5 

 4 

 2 

 2 



9 

 9 

 5 



2 

 10 



10 

 10 



1 



10 



202 

 0-17 

 1-41 



rio 



0-17 

 0-69 

 0-71 



Gloomy. 

 Fine. 

 Fine. 

 Thunder 

 storm. 

 Gloomy. 

 Showery 

 Showery 

 Gloomy. 



The I^aneowry returns shew that a fall of '03" had occurred in the 

 barometer. The winds were slightly stronger, but were only blowing 

 with an average velocity of 8 miles per hour, the normal rate at that 

 station in K'ovember. The sky was overcast, and rain continued to fall 

 in moderate amounts. 2'02 inches were registered for the 24 hours pre- 

 ceding 10 A. M. 



Heavy rain was apparently falling at this time to the north-east of 

 the Nicobars and to the east of the Andamans. There is no direct evidence 

 of this statement. The first indications, however, of cyclonic motion are 

 presented by the Port Blair observations of this day. The barometer was 

 falling at that station, the sky was, as on the 8th, densely clouded, and 

 heavy rain began to fall in the afternoon and evening. The wind shifted 

 round to west at 10 A. m. and to W. S. W. at 4 p. m. On the opposite 

 coast of the Martaban Gulf, the sky was overcast, but little rain fell. In 

 South Burmah, the weather was fine with passing clouds, which gave 

 occasional showers. The sea was slight at Diamond Island. Hence the 

 €-vn[dence is fairly complete that there was, as on the 8th, no definite cyclonic 

 circulation, although there were slight indications of its commencement. 



The shift of wind at Port Blair, and the occurrence of rainfall with 

 squalls to the west of it, render it almost certain that the usual actions, 

 which initiate the formation of an atmospheric whirl on a large scale, 

 were now commencing. The meteorology of the 10th will show tliat 

 the formation probably proceeded slowly during the afternoon and night 

 of th<i 9th, but afterwards with increasing rapidity, 

 19 



