Grand County, Colorado severe weather history spans 44 recorded events between 1960 and 2024. The dominant hazard is thunderstorm wind, accounting for 47.7% of all recorded events. It ranks #3,074 nationally and #52 in Colorado.
44
Recorded events
0
Direct deaths
31
Direct injuries
$333K
Property damage
The record
What the Grand County, Colorado severe weather history record shows
Across the archive, Grand County, Colorado severe weather history averages 0.7 recorded events a year. The busiest stretch on record is the 2020s, with 29 events logged in that decade alone. Roughly 2 events fall before 1990 and 42 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The costliest is thunderstorm wind, with $200K in reported property damage. In total, 5 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in Grand County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Thunderstorm Wind | 21 | 0 | $200K | 96 | 1960–2024 |
| Flash Flood | 16 | 0 | $125K | 0 | 2000–2023 |
| Hail | 4 | 0 | $5K | 1.75 | 1993–2020 |
| Lightning | 2 | 0 | $0 | 0 | 2004–2006 |
| Tornado | 1 | 0 | $3K | F1 | 1984–1984 |
Decade by decade
Grand County, Colorado severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
1 mapped tornado paths intersect this county: 1 touched down inside it and 0 crossed in from a neighbouring county. This comes from path geometry, not county-tagged reports.
| Date | Scale | Deaths | Injuries | Path length | Origin |
|---|---|---|---|---|---|
| 1984-06-08 | EF1 | 0 | 0 | 0.3 mi | Touched down here |
Significant events
Deadliest events on record in Grand County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Jun 20, 2004 | Lightning | KREMMLING | 0 | 19 | $0 |
| Jul 23, 2021 | Flash Flood | HEENEY | 0 | 10 | $0 |
| Jun 30, 2011 | Thunderstorm Wind | GRANBY ARPT | 0 | 1 | $0 |
| Jul 3, 2006 | Lightning | GRANBY | 0 | 1 | $0 |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Heavy rain produced a debris flow that impacted CO-125 near Mile Marker 7. County Road 21 was also flooded near its confluence. The debris flow forced the closure of the highway until it could be cleared. A mud/debris flow in the Cabin Creek drainage partially buried a parked USFS vehicle, and trapped the employee behind a washed-out road. The Forest Service employee was assessing one of the closed forest service roads when the storm hit, he was found safe and uninjured.
Grand County experienced periods of heavy rainfall during the evening. The commercial operation at Drowsy Water Ranch was heavily impacted. The Ranch began an evacuation of guests to predetermined safe facilities on the property in accordance with their emergency plans.
Heavy rain produced flash flooding along Highway 125, with mud and debris flows crossing the roadway. The highway was closed temporarily to clear off the debris. The U.S. Forest Service reported flooding and some damage on Cabin Creek and Buffalo Creek Roads.
Context
Risk, population and federal disasters
Relatively Low
FEMA NRI risk rating
15,895
Population (ACS)
$602K
Median home value
8
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Jan 15, 2021 | Fire | WILDFIRES | DR |
| Oct 17, 2020 | Fire | EAST TROUBLESOME FIRE | FM |
| Mar 28, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Sep 5, 2005 | Coastal Storm | HURRICANE KATRINA EVACUATION | EM |
| Apr 9, 2003 | Snowstorm | SNOW | EM |
Quick answers
Frequently asked
How many severe weather events have been recorded in Grand County, Colorado?
44 events are on record between 1960 and 2024, causing 0 direct deaths and $333K in property damage.
What is the most common severe weather hazard in Grand County?
Thunderstorm Wind, with 21 recorded events — 47.7% of everything in the archive for this county.
How many tornadoes have crossed Grand County?
1 mapped tornado paths intersect the county boundary; 1 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover Grand County?
8 federal disaster declarations from FEMA include Grand County, each tied to a specific incident period.
How risky is Grand County compared with the rest of the country?
FEMA's National Risk Index rates Grand County as relatively low risk, placing it in the 50 percentile of its state for expected annual loss.
Where does the Grand County, Colorado severe weather history data come from?
Every figure is drawn from United States federal public-domain records: NOAA/NCEI Storm Events for the event archive, NOAA SPC SVRGIS for mapped tornado paths, FEMA for disaster declarations and risk ratings, and the U.S. Census for population context. Dates are shown in UTC and recent entries may still be revised by NOAA.
Nearby
Neighbouring counties
- Gilpin County 19
- Gunnison County 65
- Garfield County 229
- Hinsdale County 16
- Fremont County 203
- Huerfano County 193
Cite this page
“Grand County, Colorado.” Severe Weather History. severeweatherhistory.com/county/colorado/grand-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.