NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Glyndon, MN
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 Glyndon, Minnesota since records began in 1851. Since 1950, 95 tornadoes have touched down within 25 miles, 4 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 95
- EF3 or stronger
- 4
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
10 deaths in all
What the records show for Glyndon
The strongest of the 95 tornadoes within 25 miles was an F5 on June 20, 1957; its path passed within a mile of the city centre, and it killed 10 people. Of the 95, 6 had paths within 5 miles of the city centre, and 39 have come since 2000. July has had the most tornadoes, 35. The most recent tornado was on June 20, 2025. Glyndon has more tornadoes within 25 miles than 60% of the 341 Minnesota cities on this site. Hail has been reported within 10 miles 79 times since 1959, with stones up to 3 inches (tea cup size). Of the 341 Minnesota cities, 55% have more hail reports within 10 miles than Glyndon.
Compare Glyndon's storm record with another city →
Tornadoes within 25 miles of Glyndon
By decade
- 2020s6
- 2010s16
- 2000s17
- 1990s13
- 1980s13
- 1970s12(2 EF3+)
- 1960s6
- 1950s12(2 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| Jun 20, 1957 | F5 | in town | 52.4 mi | 10 / 103 |
| Jun 28, 1975 | F4 | 7 mi | 5.4 mi | 0 / 0 |
| Jun 28, 1975 | F3 | in town | 2.3 mi | 0 / 0 |
| Aug 30, 1956 | F3 | 11 mi | 5.1 mi | 0 / 8 |
| Jul 11, 2017 | EF2 | 21 mi | 12.81 mi | 0 / 0 |
| May 30, 2011 | EF2 | 14 mi | 7.44 mi | 0 / 0 |
| May 30, 2011 | EF2 | 14 mi | 4 mi | 0 / 0 |
| May 30, 2011 | EF2 | 23 mi | 4.27 mi | 0 / 0 |
| Sep 5, 2005 | F2 | 17 mi | 4 mi | 0 / 0 |
| Jun 5, 1996 | F2 | 17 mi | 5 mi | 0 / 0 |
| May 5, 1965 | F2 | 19 mi | 33.8 mi | 0 / 0 |
| May 31, 1960 | F2 | 16 mi | 0.1 mi | 0 / 0 |
The strongest 12 of 95, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Glyndon
The Storm Prediction Center has 79 hail reports within 10 miles of Glyndon since 1959, made on 58 separate days. Of these, 55 were 1 inch across or larger, and 9 reached 2 inches. The largest, 3 inches (tea cup size), fell on September 21, 2007. The most recent report is from July 13, 2023. July has the most reports, 22.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Glyndon
The nearest NOAA station with 1991–2020 climate normals is Moorhead, MN, 9 miles west of Glyndon at 904 feet. July is the warmest, with an average high of 82°F and low of 61°F; January is the coolest, at 17°F and 0°F. June is the wettest at 4.7 inches of precipitation on average and January and February the driest at 0.7 inches; the year adds up to 26.0 inches over 53 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 170 nights a year. Snowfall averages 52.7 inches a year, most of it in January. That 26.0 inches is more than at 16 of the 124 Minnesota stations used on this site (13%). West Fargo, ND, 16 miles west, has its own station (Fargo Hector International Airport, ND): 24.1 inches a year, 1.9 less than here, and the same July average high, 82°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 17 | 0 | 0.7 | 3 | 12.2 |
| Feb | 23 | 4 | 0.7 | 2 | 7.7 |
| Mar | 37 | 18 | 1.3 | 4 | 9.3 |
| Apr | 54 | 32 | 1.7 | 4 | 4.0 |
| May | 69 | 45 | 3.4 | 6 | 0.0 |
| Jun | 78 | 56 | 4.7 | 7 | 0.0 |
| Jul | 82 | 61 | 3.4 | 6 | 0.0 |
| Aug | 81 | 59 | 2.7 | 5 | 0.0 |
| Sep | 72 | 49 | 2.9 | 5 | 0.0 |
| Oct | 55 | 36 | 2.5 | 5 | 0.7 |
| Nov | 38 | 21 | 1.1 | 3 | 8.0 |
| Dec | 23 | 8 | 0.9 | 2 | 10.8 |
| Year | 52 | 32 | 26.0 | 53 | 52.7 |
Averages for 1991–2020 at Moorhead, MN (904 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 Glyndon
Since 1996, the National Weather Service has logged 81 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Glyndon: 69 thunderstorm wind reports, 8 flash floods and 4 floods. None is recorded as killing or injuring anyone; the NWS estimated $252,000 in property and crop damage. The strongest thunderstorm gust on record here was 92 mph, on June 29, 2018. July has had the most flash floods, 3 of 8. Of the 312 Minnesota cities on this site with a flash flood on record, 204 have had fewer than Glyndon.
May 28, 2002: thunderstorm wind 9 miles from the centre of Glyndon — $100,000 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
Flood insurance policyholders in Glyndon's ZIP code 56547 have filed 31 claims with the National Flood Insurance Program since 1978, and were paid $359,000 for buildings and contents, in the dollars of each year. The most came from Flooding in 1997: 15 claims (48% of all) and $181,000. 61% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 120 Minnesota cities on this site with 10 or more claims, 65 have fewer than Glyndon.
| Event | Claims | Paid |
|---|---|---|
| Flooding1997 | 15 | $181,000 |
Clay County, which includes Glyndon, has been named in 29 federal disaster or emergency declarations since 1966, 24 of them major disasters (by incident: 15 floods, 10 severe storms, 2 biological emergencies, 1 drought). The latest major disaster declaration was Severe Storms and Flooding, on July 19, 2023. FEMA's National Risk Index gives Clay County a Relatively Low rating for natural hazard risk overall; by hazard: Relatively Moderate for hail, inland flooding and strong wind; Relatively Low for tornadoes and lightning; Very Low for heat waves. It models the county's expected loss from all 18 hazards it covers at $42.0 million a year, the 11th highest of 87 Minnesota counties; of the hazards above, the largest share, $28.3 million (67%), 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.