NHC HURDAT2 · SPC Tornado Database
Hurricanes and Tornadoes That Hit Milliken, CO
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 Milliken, Colorado since records began in 1851. Since 1950, 194 tornadoes have touched down within 25 miles, 3 of them rated EF3 or stronger.
- Hurricanes
- 0
- Tropical storms
- 0
- Tornadoes
- 194
- EF3 or stronger
- 3
within 75 mi, since 1851
below hurricane strength
within 25 mi, since 1950
1 deaths in all
What the records show for Milliken
The highest rating among the 194 tornadoes within 25 miles is F3 or EF3, reached 3 times; the most recent, on June 4, 2015, came within 13 miles. The deadliest, an EF3 on May 22, 2008, killed 1 person. Of the 194, 9 had paths within 5 miles of the city centre, and 55 have come since 2000. June has had the most tornadoes, 70. The most recent tornado was on July 14, 2025. Milliken has more tornadoes within 25 miles than 82% of the 157 Colorado cities on this site. Hail has been reported within 10 miles 185 times since 1958, with stones up to 2.75 inches (baseball size). Milliken has more hail reports within 10 miles than 64% of the 157 Colorado cities.
Compare Milliken's storm record with another city →
Tornadoes within 25 miles of Milliken
By decade
- 2020s10
- 2010s17(1 EF3+)
- 2000s28(1 EF3+)
- 1990s47
- 1980s44
- 1970s24
- 1960s7
- 1950s17(1 EF3+)
| Date | Rating | Distance | Path | Killed / injured |
|---|---|---|---|---|
| May 22, 2008 | EF3 | 1 mi | 38.69 mi | 1 / 78 |
| Jun 4, 2015 | EF3 | 13 mi | 6.71 mi | 0 / 0 |
| May 15, 1952 | F3 | 15 mi | 7.4 mi | 0 / 5 |
| Jun 7, 2021 | EF2 | 6 mi | 7.5 mi | 0 / 0 |
| Jul 31, 1996 | F2 | 19 mi | 5 mi | 0 / 0 |
| Jun 5, 1988 | F2 | 22 mi | 2 mi | 0 / 0 |
| Jul 7, 1987 | F2 | 22 mi | 5 mi | 0 / 0 |
| May 18, 1984 | F2 | 18 mi | 5 mi | 0 / 0 |
| May 18, 1984 | F2 | 21 mi | 5 mi | 0 / 0 |
| May 18, 1984 | F2 | 17 mi | 5 mi | 0 / 0 |
| Jun 25, 1982 | F2 | 12 mi | 1 mi | 0 / 0 |
| Jun 4, 1976 | F2 | 21 mi | 0.5 mi | 0 / 0 |
The strongest 12 of 194, by rating and then by deaths. Ratings before February 2007 are on the original Fujita scale.
Hail in Milliken
The Storm Prediction Center has 185 hail reports within 10 miles of Milliken since 1958, made on 96 separate days. Of these, 140 were 1 inch across or larger, and 10 reached 2 inches. The largest size, 2.75 inches (baseball size), was reported on 2 days, most recently June 17, 2025. The most recent report is from July 24, 2025. June has the most reports, 58.
Source: NOAA Storm Prediction Center severe weather reports, data through 2025.
Weather by month in Milliken
The nearest NOAA station with 1991–2020 climate normals is Greeley Unc, CO, 9 miles northeast of Milliken at 4,715 feet. July is the warmest, with an average high of 92°F and low of 59°F; December is the coolest, at 43°F and 18°F. May is the wettest at 2.7 inches of precipitation on average and January and February the driest at 0.5 inches; the year adds up to 14.9 inches over 36 days with at least a tenth of an inch. Highs reach 90°F on about 58 days a year, almost all from May to September. Lows fall below freezing on about 153 nights a year. Snowfall averages 34.9 inches a year, most of it in January. That 14.9 inches is more than at 38 of the 91 Colorado stations used on this site (42%). Johnstown, 3 miles west, has its own station (Loveland 2N, CO): 15.7 inches a year, 0.8 more than here, and a July average high of 89°F against 92°F.
| Month | High °F | Low °F | Precip. in | Days ≥ 0.1" | Snow in |
|---|---|---|---|---|---|
| Jan | 44 | 18 | 0.5 | 2 | 5.7 |
| Feb | 48 | 20 | 0.5 | 2 | 5.1 |
| Mar | 59 | 28 | 0.9 | 2 | 5.1 |
| Apr | 66 | 35 | 1.8 | 4 | 3.7 |
| May | 75 | 45 | 2.7 | 6 | 0.5 |
| Jun | 86 | 54 | 1.8 | 4 | 0.0 |
| Jul | 92 | 59 | 1.6 | 4 | 0.0 |
| Aug | 89 | 57 | 1.6 | 3 | 0.0 |
| Sep | 82 | 49 | 1.1 | 3 | 0.5 |
| Oct | 68 | 37 | 1.1 | 3 | 3.3 |
| Nov | 54 | 26 | 0.7 | 2 | 5.4 |
| Dec | 43 | 18 | 0.6 | 2 | 5.6 |
| Year | 67 | 37 | 14.9 | 36 | 34.9 |
Averages for 1991–2020 at Greeley Unc, CO (4,715 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 Milliken
Since 1996, the National Weather Service has logged 32 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Milliken: 21 thunderstorm wind reports, 7 flash floods, 3 floods and 1 lightning strike. They killed 1 person and injured 0, and the NWS estimated $615,000 in property and crop damage. The strongest thunderstorm gust on record here was 90 mph, on June 20, 2024. September has had the most flash floods, 4 of 7. Of the 144 Colorado cities on this site with a flash flood on record, 77 have had fewer than Milliken.
June 5, 2009: lightning strike 10 miles from the centre of Milliken — 1 killed.
May 8, 2017: flash flood 5 miles from the centre of Milliken — $550,000 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
Weld County, which includes Milliken, has been named in 16 federal disaster or emergency declarations since 1965, 12 of them major disasters (by incident: 6 floods, 3 severe storms, 2 biological emergencies, 1 coastal storm). The latest major disaster declaration was Covid-19 Pandemic, on March 28, 2020. FEMA's National Risk Index gives Weld County a Relatively Moderate rating for natural hazard risk overall; by hazard: Relatively High for tornadoes, hail, strong wind and lightning; Relatively Moderate for inland flooding; Relatively Low for heat waves. It models the county's expected loss from all 18 hazards it covers at $104.7 million a year, the 9th highest of 64 Colorado counties; of the hazards above, the largest share, $44.5 million (42%), 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.