Hail history for Thomson, Illinois
NOAA hail reports in and within about 5 km (3 miles) of Thomson since 1975, with preliminary reports to November 3, 2026.
Readout · Thomson
- Last hail
- Apr 2, 2026
- 1.75 in, golf ball size
- Hail days, last 5 years
- 1
- since Nov 3, 2021 · 2 reports
- Largest ever
- 3.00 in
- teacup · Apr 2, 2026
13 reports on 12 days since 1975 · #240 of 378 Illinois places
Hail map · Thomson
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Thomson is from April 2, 2026. A local roofer can check and document it at no cost.
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What the record says about Thomson
The latest hail report in and around Thomson is from April 2, 2026, 1.75 in (golf ball size). Since November 3, 2021 there has been one hail day; the biggest stones in that time were 3.00 in on April 2, 2026.
Over the 20 years 2006–2025, Thomson logged 2 reports on 2 hail days, about 0.1 reports a year. That is 20% of the median Illinois town on this site (0.5 a year) and ranks #240 of 378 Illinois cities and towns on this site for all-time reports. Thomson accounts for 17% of the 76 reports filed in Carroll County.
8% of reports with a size were 2 inches (hen egg) or larger, against 4% for the median Illinois town on this site. The largest hail on record here is 3.00 in (teacup) on April 2, 2026 near 2.14 NNW Thomson.
The busiest year was 2026, with 2 reports on 1 day. Hail here peaks in April (46% of reports); 77% fall between April and June.
Reports a year 2006–2025 average
- Thomson 0.1
- Carroll County 1.7
- Median Illinois town on this site 0.5
Hail days 2006–2025
- Thomson 2
- Carroll County 21
- Median Illinois town on this site 8
Share 2 in or larger of sized reports
- Thomson 8%
- Carroll County 5%
- Median Illinois town on this site 4%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 2 | |||||||||||
| 2025 | 0 | ||||||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 0 | ||||||||||||
| 2022 | 0 | ||||||||||||
| 2021 | 0 | ||||||||||||
| 2020 | 0 | ||||||||||||
| 2019 | 0 | ||||||||||||
| 2018 | 0 | ||||||||||||
| 2017 | 0 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Apr 2, 2026 | 2 | 3.00 in | — |
Largest hail on record
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Apr 2, 2026 | 3.00 inteacup | 2.14 NNW Thomson | Carroll | — | 16:37 local · NCEI |
| Apr 2, 2026 | 1.75 ingolf ball | 1.38 N Thomson | Carroll | — | 16:38 local · NCEI |
| Apr 22, 1988 | 1.75 ingolf ball | — | Carroll | — | 19:35 local · NCEI |
| Jun 4, 1975 | 1.75 ingolf ball | — | Carroll | — | 17:25 local · NCEI |
| Jun 18, 2003 | 1.00 inquarter | Thomson | Carroll | $20K | 15:06 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 5 38%
- 1–2 in 7 54%
- 2 in + 1 8%
Most recent reports
| Date | Size | Location | County | Damage | Time · source |
|---|---|---|---|---|---|
| Apr 2, 2026 | 1.75 ingolf ball | 1.38 N Thomson | Carroll | — | 16:38 local · NCEI |
| Apr 2, 2026 | 3.00 inteacup | 2.14 NNW Thomson | Carroll | — | 16:37 local · NCEI |
| Apr 25, 2008 | 0.75 inpenny | 2.07 S Thomson | Carroll | — | 08:02 local · NCEI |
| Mar 12, 2006 | 0.75 inpenny | Mt Carroll | Carroll | — | 21:55 local · NCEI |
| Jun 18, 2003 | 1.00 inquarter | Thomson | Carroll | $20K | 15:06 local · NCEI |
| Aug 12, 2002 | 0.88 innickel | Thomson | Carroll | — | 18:40 local · NCEI |
| Jun 18, 1998 | 1.00 inquarter | Thomson | Carroll | — | 17:15 local · NCEI |
| May 18, 1997 | 1.00 inquarter | Thomson | Carroll | — | 17:15 local · NCEI |
| Apr 22, 1988 | 1.75 ingolf ball | — | Carroll | — | 19:35 local · NCEI |
| Apr 5, 1988 | 1.00 inquarter | — | Carroll | — | 16:59 local · NCEI |
| Apr 25, 1981 | 0.75 inpenny | — | Carroll | — | 21:05 local · NCEI |
| Mar 26, 1976 | 0.75 inpenny | — | Carroll | — | 17:10 local · NCEI |
Hail history near Thomson
- Savanna 13 km · 13
- Fulton 13 km · 10
- Mount Carroll 17 km · 16
- Morrison 22 km · 25
- Hanover 34 km · 11
- Erie 35 km · 12
- Prophetstown 37 km · 15
- Sterling 40 km · 22
Questions about hail in Thomson
How often does it hail in Thomson, Illinois?
13 hail reports have been logged in and within about 5 km (3 miles) of Thomson since 1975. Over the 20 years 2006–2025 that averages 0.1 reports a year. That ranks #240 of 378 Illinois places by number of reports.
When is hail season in Thomson?
Most reports come in April, June, March. April alone accounts for 46% of all reports.
What is the largest hail recorded in Thomson?
3.00 in (teacup size) on April 2, 2026 near 2.14 NNW Thomson. 8% of reports here were 2 inches or larger.
When did it last hail in Thomson?
The most recent report in this data is from April 2, 2026 (1.75 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Thomson had in the last five years?
1 separate days with hail reports since November 3, 2021, adding up to 2 reports. The most recent was April 2, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.