NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Grantsburg, WI
Every tropical system within 75 miles since 1851 and every tornado within 25 miles since 1950.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
No tropical storm or hurricane has passed within 75 miles of Grantsburg, Wisconsin since records began in 1851. Since 1950, 51 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 51
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
4 deaths in all
What the records show for Grantsburg
The strongest of the 51 tornadoes within 25 miles was an F4 on May 21, 1957; its path came within 10 miles. The deadliest, an F3 on June 18, 2001, killed 2 people. Of the 51, 5 had paths within 5 miles of the city centre, and 27 have come since 2000. July has had the most tornadoes, 17. The most recent tornado was on June 18, 2024. Of the 416 Wisconsin cities on this site, 81% have more tornadoes within 25 miles than Grantsburg. Hail has been reported within 10 miles 56 times since 1956, with stones up to 2 inches (hen egg size). Grantsburg has more hail reports within 10 miles than 52% of the 416 Wisconsin cities.
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Tornadoes within 25 miles of Grantsburg
By decade
- 2020s4
- 2010s10
- 2000s13(1 EF3+)
- 1990s10
- 1980s4
- 1970s1
- 1960s5
- 1950s4(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 21, 1957 | F4 | 10 mi | 9.2 mi | 0 / 2 |
| Jun 18, 2001 | F3 | 2 mi | 34 mi | 2 / 16 |
| Jun 23, 1952 | F3 | 19 mi | 18.2 mi | 2 / 6 |
| Jun 17, 2010 | EF2 | 5 mi | 7.82 mi | 0 / 2 |
| May 5, 1965 | F2 | 4 mi | 14.3 mi | 0 / 0 |
| Jun 18, 2024 | EF1 | 24 mi | 4.99 mi | 0 / 0 |
| May 30, 2022 | EF1 | 22 mi | 3.3 mi | 0 / 0 |
| Jun 28, 2017 | EF1 | 12 mi | 2.2 mi | 0 / 0 |
| Jun 11, 2005 | F1 | 12 mi | 6 mi | 0 / 0 |
| Jun 18, 2001 | F1 | 23 mi | 8.3 mi | 0 / 0 |
| Oct 26, 1996 | F1 | 22 mi | 12 mi | 0 / 1 |
| Jul 21, 1995 | F1 | 20 mi | 6 mi | 0 / 0 |
The strongest 12 of 51, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Grantsburg
The Storm Prediction Center has 56 hail reports within 10 miles of Grantsburg since 1956, made on 41 separate days. Of these, 28 were 1 inch across or larger, and 2 reached 2 inches. The largest size, 2 inches (hen egg size), was reported on 2 days, most recently May 12, 2022. The most recent report is from May 15, 2025. July has the most reports, 15.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Grantsburg
The nearest NOAA station with 1991–2020 climate normals is Grantsburg, WI, 2 miles northwest of Grantsburg at 990 feet. July is the warmest, with an average high of 82°F and low of 58°F; January is the coolest, at 22°F and 1°F. July is the wettest at 4.6 inches of precipitation on average and January and February the driest at 0.9 inches; the year adds up to 34.1 inches over 65 days with at least a tenth of an inch. Highs reach 90°F on about 10 days a year, almost all from June to August. Lows fall below freezing on about 177 nights a year. Snowfall averages 52.2 inches a year, most of it in December. That 34.1 inches is more than at 69 of the 165 Wisconsin stations used on this site (42%). Frederic, 13 miles east, has its own station (Luck, WI): 32.9 inches a year, 1.2 less than here, and a July average high of 81°F against 82°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 22 | 1 | 0.9 | 3 | 10.8 |
| Feb | 28 | 5 | 0.9 | 3 | 8.9 |
| Mar | 41 | 18 | 1.6 | 4 | 8.4 |
| Apr | 56 | 31 | 2.9 | 6 | 3.5 |
| May | 69 | 44 | 4.1 | 7 | 0.1 |
| Jun | 78 | 53 | 4.5 | 8 | 0.0 |
| Jul | 82 | 58 | 4.6 | 7 | 0.0 |
| Aug | 80 | 56 | 4.5 | 7 | 0.0 |
| Sep | 72 | 47 | 3.7 | 6 | 0.0 |
| Oct | 58 | 35 | 3.2 | 6 | 0.5 |
| Nov | 41 | 22 | 1.8 | 4 | 8.1 |
| Dec | 27 | 10 | 1.4 | 4 | 11.9 |
| Year | 55 | 32 | 34.1 | 65 | 52.2 |
Averages for 1991–2020 at Grantsburg, WI (990 ft), from NOAA NCEI U.S. Climate Normals. Normals describe the station; the farther a place is from it, and the bigger the difference in height, the more its weather can differ.
Floods, thunderstorm wind and lightning near Grantsburg
Since 1996, the National Weather Service has logged 39 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Grantsburg: 38 thunderstorm wind reports and 1 lightning strike. None is recorded as killing or injuring anyone; the NWS estimated $59,000 in property and crop damage. The strongest thunderstorm gust on record here was 92 mph, on July 1, 2011.
Source: NOAA NCEI Storm Events Database, events whose starting point is on record, 1996 to June 30, 2026. Damage is the NWS estimate in the dollars of the year, not insured losses, and NWS notes that some reports are unverified.
Flood insurance claims, disaster declarations and FEMA risk ratings
Burnett County, which includes Grantsburg, has been named in 10 federal disaster or emergency declarations since 1976, 6 of them major disasters (by incident: 3 severe storms, 2 biological emergencies, 2 floods, 1 drought). The latest major disaster declaration was Covid-19 Pandemic, on April 4, 2020. FEMA's National Risk Index gives Burnett County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Moderate for strong wind and lightning; Relatively Low for tornadoes, hail and inland flooding; Very Low for heat waves. It models the county's expected loss from all 18 hazards it covers at $11.6 million a year, the 60th highest of 72 Wisconsin counties; of the hazards above, the largest share, $5.8 million (50%), is from inland flooding.
Claims: FEMA, OpenFEMA Dataset FIMA NFIP Redacted Claims – v3, summed over ZIP codes; payments in the dollars of each year, not adjusted for inflation. Declarations: Disaster Declarations Summaries – v2, by county. Retrieved October 25, 2026. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Risk ratings: FEMA, National Risk Index county table, December 2025 (v1.20), retrieved October 26, 2026; ratings compare counties nationwide, are meant for planning and are no substitute for a local risk assessment. This product uses the Federal Emergency Management Agency's National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
What counts as a pass, the distances and the sources: how this storm history is built.
Cities near Grantsburg
- Frederic, WI13 mi
- Siren, WI14 mi
- Pine City, MN15 mi
- Rush City, MN15 mi
- Luck, WI16 mi
- Hinckley, MN19 mi
- Saint Croix Falls, WI20 mi
- Webster, WI20 mi
- Harris, MN20 mi
- Centuria, WI22 mi
- North Branch, MN22 mi
- Balsam Lake, WI24 mi
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