168 C. Little — The Himalayan summer storm of Sept. 24th, 1903. [No. 4, 



line of the advancing disturbance, and anyone wlio lias watched 

 meteorological reports in such circumstances will be aware that there 

 are irregularities due to local storms. I have given the averages to elimi- 

 nate these irregularities as far as possible, and to show the advance 

 of the general disturbance. 



As on previous occasions, pressure changes are not of much assis- 

 tance in showing the importance of the general change then in pro- 

 gress. There was a slow fall of pressure on the 23rd in Assam, Bengal 

 and Orissa. It continued somewhat more rapidly on the 24th and 

 extended to the Oircars, Akyab and Diamond Island, which had not 

 been affected on the 23rd. The recovery is general on the 25th, and the 

 brisk fall on the 27th shows the development of the cyclonic storm over 

 Lower Bengal and the north of the Bay. 



In Table II the variations from the normal are given. It will be 

 seen that pressure was in excess, considerable excess as it is usually 

 measured in these parts, on the 22nd and 23rd ; and that deficient pres- 

 sure was not noticeably present until the 28th and 29th, when the shal- 

 low depression had formed over Lower Bengal and the north of the 

 Bay. 



Table III. 



Giving the temperature change daily from September 22nd to Sep- 

 tember 30th, 1903, arranged to show the southward progress of 

 the disturbance. 





September 

 22. 



September 

 23. 



September 

 24. 



September 

 25. 



Assam 



+ 0-8° 



-10° 



-1-9° 



-2*0° 



North Bengal ... 



+ 3 



+ 1-2 



-2-8 



-2*0 



East Bengal ... 



+ 0-3 



-0-6 



-0-7 



-21 



South- West Bengal 



-O'S 



+ 6 



+ 0-8 



-16 



Orissa 



+ 0-4 



-0-2 



+ 0-3 



+ 0-6 



Circars 



-0-9 



-0-1 



-0-7 



+ 1-4 



Akyab 



+ 15 



-20 



-1-0 



+ 1-5 



Diamond Island 



+ 0-8 



+ 0-2 



+ 0-5 



+ 0-5 



