Hail Risk in Iowa

All Iowa counties ranked by FEMA National Risk Index hail score

Hail risk — ice stones from severe thunderstorms that damage property and crops — is rated for 99 of 99 Iowa counties in FEMA's National Risk Index. Polk County carries the state's highest hail score at 97.9, with $7M in expected annual hail losses.

9 Iowa counties are rated High or Very High for hail, and expected annual losses from hail total roughly $129M statewide. The full ranking below links to each county's complete 18-hazard risk profile.

County Rankings — Hail

#CountyHail ScoreRatingAnn. Freq.Ann. Loss
1 Polk County
97.9
High 6.13 / yr $7M
2 Linn County
97.6
High 4.66 / yr $7M
3 Hardin County
97.2
High 5.74 / yr $5M
4 Carroll County
96.9
High 5.81 / yr $5M
5 Scott County
96.1
High 3.97 / yr $4M
6 Pottawattamie County
95.7
High 6.61 / yr $4M
7 Sioux County
95.5
High 6.49 / yr $6M
8 Johnson County
95.3
High 4.44 / yr $4M
9 Woodbury County
95.0
High 6.02 / yr $3M
10 Plymouth County
93.5
Medium 6.23 / yr $3M
11 Calhoun County
92.8
Medium 5.67 / yr $2M
12 Buena Vista County
91.9
Medium 5.27 / yr $2M
13 Muscatine County
91.7
Medium 4.31 / yr $2M
14 Webster County
91.2
Medium 5.61 / yr $2M
15 Sac County
90.9
Medium 5.37 / yr $3M
16 Des Moines County
90.1
Medium 3.97 / yr $2M
17 Lyon County
89.4
Medium 6.13 / yr $3M
18 Dubuque County
89.3
Medium 3.99 / yr $3M
19 Cherokee County
88.6
Medium 5.79 / yr $2M
20 Black Hawk County
87.3
Medium 5.03 / yr $2M
21 Clinton County
87.0
Medium 4.02 / yr $1M
22 Story County
86.8
Medium 6.20 / yr $2M
23 Delaware County
86.4
Medium 4.51 / yr $1M
24 Harrison County
86.4
Medium 6.39 / yr $1M
25 Osceola County
86.3
Medium 5.74 / yr $1M
26 Lee County
85.7
Medium 3.64 / yr $1M
27 Washington County
83.3
Medium 4.44 / yr $1M
28 Winneshiek County
83.1
Medium 4.40 / yr $1M
29 Clay County
83.0
Medium 5.10 / yr $2M
30 Adair County
82.6
Medium 6.21 / yr $905K
31 Monona County
82.6
Medium 6.08 / yr $1M
32 Jackson County
82.5
Medium 4.06 / yr $1M
33 Clayton County
82.4
Medium 4.20 / yr $1M
34 O'Brien County
82.2
Medium 6.13 / yr $2M
35 Fayette County
82.1
Medium 4.43 / yr $894K
36 Dallas County
81.6
Medium 6.27 / yr $2M
37 Marshall County
80.9
Medium 6.16 / yr $926K
38 Floyd County
80.9
Medium 4.51 / yr $890K
39 Ida County
80.7
Medium 5.73 / yr $970K
40 Henry County
80.0
Medium 3.99 / yr $835K
41 Chickasaw County
79.8
Medium 4.41 / yr $917K
42 Allamakee County
79.7
Medium 4.11 / yr $753K
43 Cass County
79.5
Medium 6.19 / yr $662K
44 Jasper County
79.1
Medium 6.05 / yr $969K
45 Shelby County
78.5
Medium 6.16 / yr $1M
46 Palo Alto County
77.7
Medium 4.85 / yr $1M
47 Crawford County
76.8
Medium 5.79 / yr $801K
48 Cerro Gordo County
76.1
Medium 4.58 / yr $697K
49 Page County
76.0
Medium 6.14 / yr $697K
50 Benton County
75.3
Medium 4.73 / yr $1M
51 Jefferson County
75.3
Medium 4.00 / yr $592K
52 Poweshiek County
74.3
Medium 5.62 / yr $790K
53 Union County
74.2
Medium 5.88 / yr $528K
54 Buchanan County
74.0
Medium 4.74 / yr $1M
55 Iowa County
73.5
Medium 4.60 / yr $787K
56 Jones County
73.0
Low 4.48 / yr $981K
57 Mills County
72.7
Low 6.83 / yr $973K
58 Hamilton County
72.3
Low 5.70 / yr $712K
59 Montgomery County
72.1
Low 6.17 / yr $640K
60 Wright County
72.0
Low 5.11 / yr $612K
61 Grundy County
70.3
Low 5.62 / yr $956K
62 Bremer County
69.2
Low 4.76 / yr $993K
63 Dickinson County
68.9
Low 4.77 / yr $668K
64 Cedar County
68.4
Low 4.34 / yr $857K
65 Keokuk County
68.2
Low 4.40 / yr $599K
66 Fremont County
68.2
Low 6.86 / yr $575K
67 Madison County
68.0
Low 6.20 / yr $464K
68 Louisa County
67.9
Low 4.37 / yr $648K
69 Audubon County
66.4
Low 6.11 / yr $458K
70 Boone County
66.0
Low 6.14 / yr $833K
71 Mahaska County
64.6
Low 5.16 / yr $509K
72 Lucas County
64.2
Low 5.38 / yr $357K
73 Tama County
63.9
Low 5.75 / yr $382K
74 Hancock County
63.5
Low 4.64 / yr $507K
75 Humboldt County
63.2
Low 5.10 / yr $502K
76 Pocahontas County
63.1
Low 5.19 / yr $449K
77 Greene County
63.1
Low 6.13 / yr $502K
78 Wapello County
62.9
Low 4.18 / yr $410K
79 Taylor County
62.5
Low 5.79 / yr $339K
80 Ringgold County
62.5
Low 5.58 / yr $578K
81 Winnebago County
61.6
Low 4.39 / yr $386K
82 Guthrie County
59.9
Low 6.20 / yr $601K
83 Howard County
59.8
Low 4.58 / yr $569K
84 Appanoose County
58.3
Low 4.15 / yr $286K
85 Davis County
57.6
Low 3.72 / yr $240K
86 Emmet County
57.5
Low 4.52 / yr $364K
87 Mitchell County
57.1
Low 4.55 / yr $420K
88 Butler County
55.4
Low 5.09 / yr $527K
89 Van Buren County
55.1
Low 3.57 / yr $251K
90 Franklin County
53.7
Low 5.09 / yr $432K
91 Marion County
53.5
Low 5.53 / yr $397K
92 Kossuth County
51.7
Low 4.59 / yr $424K
93 Wayne County
51.5
Low 5.01 / yr $213K
94 Adams County
50.3
Low 5.97 / yr $286K
95 Warren County
49.2
Low 5.88 / yr $416K
96 Decatur County
47.6
Low 5.38 / yr $229K
97 Clarke County
45.3
Low 5.76 / yr $314K
98 Monroe County
30.3
Very Low 4.65 / yr $170K
99 Worth County
29.6
Very Low 4.39 / yr $171K

99 Iowa counties with measurable hail risk. See the national hail ranking or all Iowa counties by overall risk.

Frequently Asked Questions

Which Iowa county has the highest hail risk?

Polk County has the highest FEMA hail risk score in Iowa at 97.9 (High), with $7M in expected annual losses and about 6.13 events per year.

How many Iowa counties face significant hail risk?

99 Iowa counties record measurable hail risk in FEMA's National Risk Index; 9 of them are rated High or Very High.

Other Hazards in Iowa

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