San Juan County, Utah severe weather history spans 217 recorded events between 1957 and 2025. The dominant hazard is flash flood, accounting for 27.2% of all recorded events. It ranks #2,338 nationally and #8 in Utah.
217
Recorded events
1
Direct deaths
1
Direct injuries
$2.2M
Property damage
The record
What the San Juan County, Utah severe weather history record shows
Across the archive, San Juan County, Utah severe weather history averages 3.2 recorded events a year. The busiest stretch on record is the 2000s, with 80 events logged in that decade alone. Roughly 4 events fall before 1990 and 213 from 1990 onward — a gap that reflects the expansion of NOAA reporting practice as much as the weather itself.
The deadliest hazard in the San Juan County, Utah record is flash flood, responsible for 1 direct deaths. The costliest is flash flood, with $1.7M in reported property damage. In total, 10 distinct hazard types appear in this county archive, each listed with its own dated record below.
By hazard type
Every hazard type recorded in San Juan County
| Hazard | Events | Deaths | Damage | Max | Span |
|---|---|---|---|---|---|
| Flash Flood | 59 | 1 | $1.7M | 0 | 1996–2025 |
| Hail | 32 | 0 | $60K | 1.75 | 1957–2024 |
| Heavy Rain | 31 | 0 | $40K | 0 | 1998–2018 |
| Debris Flow | 28 | 0 | $67K | 0 | 2012–2022 |
| Thunderstorm Wind | 22 | 0 | $210K | 70 | 1983–2025 |
| Wildfire | 16 | 0 | $0 | 0 | 1999–2003 |
| Flood | 10 | 0 | $14K | 0 | 2001–2021 |
| Funnel Cloud | 10 | 0 | $0 | 0 | 2000–2022 |
| Tornado | 7 | 0 | $0 | EFU | 2015–2025 |
| Lightning | 2 | 0 | $101K | 0 | 2003–2009 |
Decade by decade
San Juan County, Utah severe weather history by decade
Reporting practice changed over time — early decades are undercounted, not calmer.
Tornado tracks
Paths crossing this county
7 mapped tornado paths intersect this county: 7 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 |
|---|---|---|---|---|---|
| 2025-07-12 | EF2 | 0 | 0 | 0.1 mi | Touched down here |
| 2025-09-13 | EF2 | 0 | 0 | 1.1 mi | Touched down here |
| 2025-06-05 | EF0 | 0 | 0 | 0.1 mi | Touched down here |
| 2025-09-13 | EF0 | 0 | 0 | 0.3 mi | Touched down here |
| 2024-06-21 | EF0 | 0 | 0 | 0.5 mi | Touched down here |
| 2024-07-20 | EF0 | 0 | 0 | 0.1 mi | Touched down here |
| 2015-06-06 | EF0 | 0 | 0 | 1.2 mi | Touched down here |
Significant events
Deadliest events on record in San Juan County
| Date | Type | Location | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Sep 14, 1996 | Flash Flood | WHITE CANYON | 1 | 0 | $0 |
| Aug 29, 2002 | Flash Flood | GOULDING | 0 | 1 | $300K |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Flash flooding was reported along Taylor Canyon on the afternoon of June 4h. This flooding eroded a six food embankment along White Rim Road in Canyonlands National Park, and carried sediment all the way to the Green River. Additionally, several washes along Taylor Canyon Road ran and washed out sections of Taylor Canyon Road. No other damages, and no injuries or fatalities, were received.
Heavy rainfall of nearly three quarters of an inch was reported in the southwest part of Monticello which led to localized street flooding. Heavier amounts of precipitation fell in other portions of the city which also led to flooding of basements.
Runoff from heavy rainfall caused flash flooding near White Rock Point during the evening of the 15th. Mud 4 feet deep was washed onto Highway 191 near mile marker 17. Temporary levees were also built to keep flood waters out of nearby houses. A car was also trapped by debris in a nearby wash, but no injuries occurred.
Context
Risk, population and federal disasters
Very Low
FEMA NRI risk rating
14,483
Population (ACS)
$224K
Median home value
6
Federal declarations
| Declared | Incident | Title | Type |
|---|---|---|---|
| Jul 12, 2025 | Fire | DEER CREEK FIRE | FM |
| Jun 10, 2021 | Fire | PACK CREEK FIRE | FM |
| Apr 4, 2020 | Biological | COVID-19 PANDEMIC | DR |
| Mar 13, 2020 | Biological | COVID-19 | EM |
| Sep 5, 2005 | Coastal Storm | HURRICANE KATRINA EVACUATION | EM |
| Jan 20, 1977 | Drought | DROUGHT | EM |
Within the county
Most affected places
- Grand Co Arpt 118
Quick answers
Frequently asked
How many severe weather events have been recorded in San Juan County, Utah?
217 events are on record between 1957 and 2025, causing 1 direct deaths and $2.2M in property damage.
What is the most common severe weather hazard in San Juan County?
Flash Flood, with 59 recorded events — 27.2% of everything in the archive for this county.
How many tornadoes have crossed San Juan County?
7 mapped tornado paths intersect the county boundary; 7 of them touched down inside it. This is derived from path geometry, not county-tagged reports.
How many federal disaster declarations cover San Juan County?
6 federal disaster declarations from FEMA include San Juan County, each tied to a specific incident period.
How risky is San Juan County compared with the rest of the country?
FEMA's National Risk Index rates San Juan County as very low risk, placing it in the 27 percentile of its state for expected annual loss.
Where does the San Juan County, Utah 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
Cite this page
“San Juan County, Utah.” Severe Weather History. severeweatherhistory.com/county/utah/san-juan-county/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.