Hazard Mitigation Plan update · Section 4 draft · prepared October 3, 2026
Calhoun County, Illinois Hazard Profiles
Draft. Built from public National Weather Service storm records (NOAA Storm Events, 1982 to June 2026). Not an adopted plan and not reviewed by FEMA.
Calhoun County's plan, the Calhoun County 2020 Hazard Mitigation Plan, expired October 13, 2025 in FEMA's plan-status data, with no update recorded as in progress on October 3, 2026. This chapter drafts the hazard-profile section of the update from 203 storm reports for the county, every one traceable to a NOAA event ID.
At a glance
6 hazards appear in the federal storm record for Calhoun County. Winter storms are the most frequent; tornadoes account for the most recorded deaths and damage.
Hazard
Days with reports, 1996–2025
Years with at least one
Deaths*
Injuries*
Property damage entered*
Thunderstorm wind
42
19/30
0
1
$32K
Hail
25
17/30
0
0
$0
Tornado
7
6/30
0
0
$400K
Flooding
27
15/30
0
0
$60K
Winter storms
49
23/30
0
0
$0
High wind (no storm)
8
7/30
0
0
$1K
* All years on record (tornado, wind and hail from the 1980s; other hazards from 1996). Dollars are as entered, not adjusted for inflation.
How often, year by year
Days with at least one report, 1996 to 2025. Each panel has its own scale. Hover a bar for the year.
Thunderstorm wind42 days · 19 of 30 yearsHail25 days · 17 of 30 yearsFlooding27 days · 15 of 30 yearsTornado7 days · 6 of 30 yearsWinter storms49 days · 23 of 30 years
Show the numbers behind the charts
Year
Thunderstorm wind
Hail
Tornado
Flooding
Winter storms
High wind (no storm)
1996
2
3
0
2
1
0
1997
0
0
0
0
3
1
1998
3
1
1
0
3
0
1999
2
0
1
0
2
0
2000
4
0
0
1
3
0
2001
2
0
0
3
1
2
2002
2
1
1
4
3
1
2003
0
2
0
3
2
0
2004
2
1
0
1
2
0
2005
2
1
0
1
1
0
2006
4
3
2
0
2
0
2007
3
0
0
1
4
0
2008
1
2
0
1
4
1
2009
1
0
0
0
0
1
2010
0
1
1
1
1
0
2011
0
2
0
0
3
0
2012
0
1
0
0
0
0
2013
1
0
0
4
2
0
2014
0
1
0
1
2
0
2015
1
0
0
2
1
0
2016
3
1
0
0
0
0
2017
0
0
0
0
0
0
2018
3
1
0
0
1
0
2019
2
1
0
0
2
1
2020
0
0
0
0
0
0
2021
3
1
0
1
1
0
2022
0
0
0
0
3
0
2023
1
2
0
0
0
0
2024
0
0
0
0
0
0
2025
0
0
1
1
2
1
When in the year
Days with reports by month, 1996 to 2025. Darker means more days.
J
F
M
A
M
J
J
A
S
O
N
D
Thunderstorm wind
1
3
2
7
9
7
5
3
3
1
1
Hail
1
2
4
9
4
2
1
1
1
Tornado
1
2
1
2
1
Flooding
1
4
10
8
1
1
1
1
Winter storms
18
12
3
1
4
11
High wind (no storm)
1
3
1
1
1
1
Tornado tracks, 1998–2025
8 tornadoes. Lines run from touchdown to lift within the county; dots are tornadoes recorded at a single point. Hover a track for its date and rating.
F0/EF0F1/EF1F2/EF2F3 or strongerF5Unrated
County outline from the Census Bureau (simplified); community labels sit at the average location of reports naming them.
Hazard profiles
Each profile answers FEMA's questions for hazard identification: what it is, where, how bad (extent), what has happened, and how likely it is to happen again.
Tornado
Description
A violently rotating column of air in contact with the ground, rated after the fact on the Fujita scale (through January 2007) or the Enhanced Fujita scale, EF0 to EF5, by the damage it leaves.
Location
Countywide; tornado reports name 4 communities, most often Mozier, Belleview and Centerville.
Extent
The strongest on record is the F2 of February 11, 1999 near Mozier. Tornadoes rated F2/EF2 or stronger touched down on 1 separate day.
Previous occurrences
8 tornadoes on 7 days from 1998 to 2025.
Probability
At least one tornado in 6 of 30 years (20%) from 1996 to 2025.
Recorded losses
0 deaths, 0 injuries, $400K in property damage as entered by the Weather Service (2 of 8 reports carry a dollar figure).
Severe thunderstorm wind
Description
Straight-line winds from thunderstorms, including downbursts, measured or estimated at 58 mph (50 knots) or more.
Location
Countywide; reports name 11 communities, most often Hardin, Batchtown and Brussels.
Extent
The highest gust on record is 61 knots (70 mph), estimated near Mozier on May 22, 2019.
Previous occurrences
74 reports on 59 days since 1982. July 9, 2021: "Thunderstorm winds blew down several large trees near Michael."
Probability
Reports in 19 of 30 years (63%) from 1996 to 2025; about 1.4 damaging-wind days a year.
Recorded losses
0 deaths, 1 injury, $32K in property damage as entered by the Weather Service (7 of 74 reports carry a dollar figure).
Hail
Description
Ice stones from thunderstorm updrafts; reported at 3/4 inch and larger in this record.
Location
Countywide; reports name 9 communities, most often Kampsville, Hardin and Batchtown.
Extent
Largest: 2.75 inches near Hardin on June 22, 2006. 3 reports of 2 inches or more.
Previous occurrences
32 reports on 27 days since 1983.
Probability
Reports in 17 of 30 years (57%) from 1996 to 2025.
Recorded losses
0 deaths, 0 injuries, $0 in property damage as entered by the Weather Service (0 of 32 reports carry a dollar figure).
Flooding (river, flash and heavy rain)
Description
River flooding, and flash flooding when heavy rain overwhelms streets, ditches and small streams.
Location
Countywide; reports name 7 communities, most often Belleview, Kampsville and Golden Eagle.
Extent
The costliest entry is July 27, 2025, at $50K in property damage.
Previous occurrences
30 flood, flash-flood and heavy-rain reports since 1996. July 27, 2025: "The Calhoun County sheriff reported at least 5 trees across roads around Hamburg. The closed roads in the county include Route 100, Michael Hamburg Road, Treshman Hollow Road, Irish Hollow Road, Gresham Hollow Road, …"
Probability
Reports in 15 of 30 years (50%) from 1996 to 2025.
Recorded losses
0 deaths, 0 injuries, $60K in property damage as entered by the Weather Service (6 of 30 reports carry a dollar figure).
Winter storms and ice
Description
Heavy snow, blizzards, ice storms, sleet and lesser winter weather, recorded by forecast zone rather than by point.
Location
Countywide (forecast-zone records).
Extent
Ice storms on 3 occasions. Zone records rarely give snow or ice totals; the full plan adds station data.
Previous occurrences
50 zone events from 1996 to 2025: 30 winter storm, 11 heavy snow, 3 ice storm, 3 winter weather, 2 sleet, 1 blizzard.
Probability
Events in 23 of 30 years (77%) from 1996 to 2025.
Recorded losses
0 deaths, 0 injuries, $0 in property damage as entered by the Weather Service (0 of 50 reports carry a dollar figure).
High wind (not from thunderstorms)
Description
Strong winds from large storm systems rather than thunderstorms, recorded by forecast zone.
Location
Countywide (forecast-zone records).
Extent
Highest: 50 knots (58 mph).
Previous occurrences
8 zone events since 1997.
Probability
Events in 7 of 30 years (23%) from 1996 to 2025.
Recorded losses
0 deaths, 0 injuries, $1K in property damage as entered by the Weather Service (1 of 8 reports carries a dollar figure).
Not covered by this record
Extreme heat, extreme cold, drought, earthquake and dam failure are not in the storm archive this chapter draws on. The full chapter profiles them from NOAA climate records, the U.S. Drought Monitor, USGS shaking maps and the state dam inventory, and the planning team decides which belong in the plan.
Previous occurrences by community
FEMA asks for hazard history for each participating jurisdiction. These are the communities the Weather Service names most often as the nearest place to a report.
Nearest community named in the report
Thunderstorm wind
Hail
Flooding
Tornado
All
Hardin
16
6
1
23
Batchtown
14
5
1
20
Kampsville
7
8
2
1
18
Belleview
3
1
6
2
12
Brussels
8
3
11
Mozier
2
1
4
7
Golden Eagle
1
4
1
6
Hamburg
2
1
3
Michael
2
1
3
Beechville
1
1
2
Deer Plain
1
1
2
Centerville
1
1
What this draft covers, and what the full update adds
Covered here
Type, location and extent of each recorded hazard (FEMA review element B1).
Previous occurrences and probability of future events, countywide and by community (element B2).
Added in the full update
Vulnerability and impacts on people, buildings and critical facilities from county parcel and building data (element B3).
National Flood Insurance Program repetitive-loss properties from FEMA (element B4).
Planning-team meetings, public input, capability review, the mitigation strategy and adoption.
Data notes
Before 1996 the storm database records only tornado, thunderstorm wind and hail, so every rate on this page uses 1996–2025.
Recent reports rarely carry a damage estimate: 2 of 13 wind, hail, tornado and flood reports since 2019 do. A missing dollar figure means "not estimated," not "no damage."
Reports follow people. Towns with more spotters and roads show more reports.
Winter storm, high wind and some flood events are recorded by forecast zone, not by point.