STARR — IOWA THUNDER-STORMS. 95 



Monona report wind force as "5." Rainfall is: Monticello, 0.87 

 inch; Middle River, 0.20; Marion, 1.00; Concord, 1.10; Cresco, 0.27; 

 Brush Creek, 0.60; Monona, 1.25; Kiron, 1.50; McGregor, 1.08; Ft. 

 Dodge, 1. 00; Emmetsburg, 2.50; Algona, 0.55; Garnavillo, 0.75. 



This storm continued on into the early morning of the 30th. Rain- 

 fall beginnings are reported as follows: Dysart, 12:25 A - M - ? Home- 

 stead, 2:30 a. m. ; Amana, 3:00 a. m. ; Cedar Rapids, 3:15 a. m. ; 

 Albia, 3:15 a. m. ; Monticello, 3:30 a. m. ; Mt. Pleasant, 5 140 A. m. 

 Perhaps the average rainfall was 0.50 inch. Dysart — "6:00 to 11:00 

 p. M. of 29th, very vivid lightning in the north; no thunder till 1:10 

 A. M. ; four or five columns of electricity seemed to extend vertically 

 to the earth from the motionless clouds that hung there for four hours." 



In August there are not so many reports as in June and July. Storms 

 are reported for each day, except the 6th, 24th, 26th, and 28th, but on 

 many days there is but a single report. A storm-cluster occurs on the 

 3d to the 5th. most marked on the 3d; another on the 8th to the 10th, 

 culminating on the 10th. The 13th is fully reported. On the 16th we 

 have several reports, and many on the 17th. A group of storms 

 occurred on the 19th to the 21st, most reports being received on the 

 20th. 



Prof. Hinrichs reports: "Thunder-storms nearly as numerous as 

 rain-storms during first half of month, but rare during the last — cold 

 decade. Much damage done to property and cattle by lightning, and 

 several people killed. High locally destructive winds accompanied the 

 thunder-storms of the 10th and 13th. Hail is reported only on the 3d, 

 in Hancock, and very light on the 8th. in Osceola County." 



Examination of the daily weather map of the United States Signal 

 Service shows connection with the general atmospheric movements as 

 follows: On the 3d we were to the southeast of a "low" overlapping 

 the corners of Dakota and Montana. This traveled east, and on the 

 4th was past us on the north. On the 5th, a well-marked "high" area 

 lay to our west; on the 6th it was over Iowa. No storms on that date. 

 On the 10th, a long, oval "low" area lay to our northwest, extending 

 from Colorado to Minnesota, and overlapping our northwestern corner. 

 August 13th, a well defined small "low" area was in Dakota and Ne- 

 braska, and on our extreme northwestern corner. This moved across 

 Iowa during the following twenty-four hours. On the 17th, a storm 

 gathered in a "low" center near St. Louis, Missouri. Can our storms 

 have been affected by it? On the 20th and 21st, "low" areas lay to 

 the west and southwest. That of the 21st was on the corner of the 



