Prevailing directio7i ofivind. — West. 

 Thunder-storms.— Aih, 7th, 15th, 17th, 19th, 20th, 25th, 

 26th, 30th, 31st. 



Hail. — Very general on 19th. 

 Tornado. — South Lawrence, 26th. 



Remarks. 



The month of July, 1890, was characterized by a severe 

 drought, extreme range of temperature, numerous thunder- 

 storms accompanied sometimes by hail and high winds, and 

 a severe and destructive tornado. The weather during the 

 month was influenced by the passage of six cyclonic areas, 

 and the same number of anti-cyclones, most of them well 

 defined. Nearly all the cyclones have passed to the north of 

 New England, and all but two of the anti-cyclones have gone 

 to the south. It has been during the passage of the former 

 down the St. Lawrence, thus causing a strong inflow of 

 warm moist air from the south and south-east, that our hot 

 oppressive days have occurred and the severe tornado and 

 thunder-storms generated ; while the low temperature and 

 frosts which have occurred in several localities on the 10th, 

 19th and 21st have been due to the influence of the anti- 

 cyclones or areas of high barometric pressure. The mean 

 temperature and total precipitation for the month have been 

 slightly below the average, while the amount of sunshine 

 has been in excess. The tornado at Lawrence on the 26th 

 was one of the most severe that has ever visited New Eng- 

 land. Its path of greatest destruction ran through Lawrence 

 and into the edge of North Andover, a distance of about two 

 miles, but outside of this area much damage was done to 

 crops and fruit and shade trees by the heavy wind and rain. 

 The course of the tornado was nearly parallel with the 

 Merrimack River, and 1,500 feet south of it. The damage 

 to buildings was about $40,000 ; to contents and things out- 

 side about $20,000. Eight persons were killed and sixty- 

 three injured. 



