NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Grawn, MI
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 Grawn, Michigan since records began in 1851. Since 1950, 17 tornadoes have touched down within 25 miles, 2 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 17
- EF3 or stronger
- 2
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
2 deaths in all
What the records show for Grawn
The strongest of the 17 tornadoes within 25 miles was an F4 on April 3, 1956; its path came within 10 miles, and it killed 1 person. The deadliest, an EF2 on October 18, 2007, killed 1 person. Of the 17, none had a path within 5 miles of the city centre, and 3 have come since 2000. July has had the most tornadoes, 5. The most recent tornado was on September 22, 2025. Of the 546 Michigan cities on this site, 89% have more tornadoes within 25 miles than Grawn. Hail has been reported within 10 miles 44 times since 1958, with stones up to 1.75 inches (golf ball size). Grawn has more hail reports within 10 miles than 60% of the 546 Michigan cities.
Compare Grawn's storm record with another city →
Tornadoes within 25 miles of Grawn
By decade
- 2020s1
- 2010s1
- 2000s1
- 1990s2
- 1980s4
- 1970s4
- 1960s3(1 EF3+)
- 1950s1(1 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Apr 3, 1956 | F4 | 10 mi | 50.3 mi | 1 / 25 |
| Jun 26, 1969 | F3 | 7 mi | 6.4 mi | 0 / 0 |
| Oct 18, 2007 | EF2 | 23 mi | 4.45 mi | 1 / 1 |
| Jul 23, 1976 | F2 | 23 mi | 3.3 mi | 0 / 5 |
| May 8, 1964 | F2 | 19 mi | 16.6 mi | 0 / 0 |
| Sep 13, 1961 | F2 | 13 mi | 14.4 mi | 0 / 0 |
| Jul 8, 1990 | F1 | 22 mi | 12 mi | 0 / 0 |
| Oct 15, 1989 | F1 | 10 mi | 1 mi | 0 / 0 |
| Oct 15, 1989 | F1 | 17 mi | 12 mi | 0 / 0 |
| Jun 26, 1986 | F1 | 14 mi | 0.7 mi | 0 / 0 |
| Jul 21, 1983 | F1 | 6 mi | 0.1 mi | 0 / 0 |
| Aug 15, 1978 | F1 | 23 mi | 2.3 mi | 0 / 0 |
The strongest 12 of 17, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Grawn
The Storm Prediction Center has 44 hail reports within 10 miles of Grawn since 1958, made on 33 separate days. Of these, 21 were 1 inch across or larger, and none reached 2 inches. The largest size, 1.75 inches (golf ball size), was reported on 2 days, most recently June 9, 2000. The most recent report is from June 21, 2025. July has the most reports, 10.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Grawn
The nearest NOAA station with 1991–2020 climate normals is Traverse City Munson, MI, 8 miles north of Grawn at 635 feet. July is the warmest, with an average high of 79°F and low of 58°F; January is the coolest, at 28°F and 15°F. October is the wettest at 4.1 inches of precipitation on average and February the driest at 2.0 inches; the year adds up to 36.2 inches over 88 days with at least a tenth of an inch. Highs reach 90°F on about 6 days a year, almost all from June to August. Lows fall below freezing on about 154 nights a year. Snowfall averages 101.0 inches a year, most of it in January. That 36.2 inches is more than at 96 of the 131 Michigan stations used on this site (73%). Buckley, 9 miles south, has its own station (Traverse City Cherry Cptl Airport, MI): 29.2 inches a year, 7.0 less than here, and a July average high of 81°F against 79°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 28 | 15 | 2.7 | 8 | 32.3 |
| Feb | 30 | 14 | 2.0 | 7 | 21.4 |
| Mar | 39 | 21 | 2.1 | 6 | 12.3 |
| Apr | 52 | 31 | 3.4 | 8 | 4.7 |
| May | 65 | 42 | 3.5 | 7 | 0.0 |
| Jun | 75 | 53 | 2.9 | 6 | 0.0 |
| Jul | 79 | 58 | 2.8 | 5 | 0.0 |
| Aug | 78 | 57 | 3.2 | 6 | 0.0 |
| Sep | 71 | 50 | 3.6 | 7 | 0.0 |
| Oct | 57 | 39 | 4.1 | 10 | 0.1 |
| Nov | 44 | 30 | 3.2 | 8 | 5.6 |
| Dec | 33 | 22 | 2.7 | 9 | 24.6 |
| Year | 54 | 36 | 36.2 | 88 | 101.0 |
Averages for 1991–2020 at Traverse City Munson, MI (635 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 Grawn
Since 1996, the National Weather Service has logged 67 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Grawn: 51 thunderstorm wind reports, 8 flash floods, 5 floods and 3 lightning strikes. None is recorded as killing or injuring anyone; the NWS estimated $7.9 million in property and crop damage. The strongest thunderstorm gust on record here was 75 mph, on July 30, 2002. Of the 376 Michigan cities on this site with a flash flood on record, 330 have had fewer than Grawn.
August 2, 2015: thunderstorm wind 6 miles from the centre of Grawn — $5.2 million damage.
October 6, 2012: flash flood 4 miles from the centre of Grawn — $1.8 million damage.
NWS: “A temporary dam and de-watering structure was in place alongside the Brown Bridge Dam on the Boardman River. This temporary dam was to assist in drawing down the small lake (Brown Bridge Pond) behind the dam, prior to the permanent removal of Brown Bridge Dam.”
May 28, 2020: flash flood 10 miles from the centre of Grawn — $310,000 damage.
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
Grand Traverse County, which includes Grawn, has been named in 6 federal disaster or emergency declarations since 1977, 2 of them major disasters (by incident: 2 biological emergencies, 1 drought, 1 flood, 1 hurricane). The latest major disaster declaration was Severe Storms, Tornadoes, and Flooding, on June 30, 2026. FEMA's National Risk Index gives Grand Traverse 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 hurricanes, coastal flooding and heat waves. It models the county's expected loss from all 18 hazards it covers at $31.2 million a year, the 20th highest of 83 Michigan counties; of the hazards above, the largest share, $10.5 million (34%), 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.