Rio Grande County
Population 11,087 (2025) 912 sq mi
Large wildfires have burned 9,397 acres of Rio Grande County since 1984, 41st most of 64 counties in Colorado; the largest was the Million Fire in 2002.
Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed
- Tornado damage paths since 19503
- Wildfire burn scars since 19842
At a glance
The record for Rio Grande County in eight numbers. Each links to its section below.
Tornadoes
About one every 25 years since 1950, none rated F3/EF3 or stronger.
Strongest
September 25, 2012
EF0, 1.4 mile path
100 yards wide.
Most recent
Tuesday, September 25, 2012
EF0, 1.4 mile path
14 years ago.
Every recorded tornado
| Sep 25, 2012 | EF0 | 1.4 | 0 | 0 |
| Jun 29, 1995 | F0 | 0.1 | 0 | 0 |
| Jun 27, 1995 | F0 | 0.1 | 0 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Rio Grande County: 0.
- Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.
Storm Prediction Center severe weather database, 1950 to 2025.
Hurricanes and tropical storms
No tropical storm or hurricane has tracked within 100 miles since records began in 1851.
Wildfire and smoke
9,397 acres burned in 2 large fires since 1984, equal to 1.6% of the land.
Largest
June 19, 2002
Million Fire, 7,919 acres
7,921 acres inside Rio Grande County.
Most recent
June 19, 2002
Million Fire
7,919 acres in total.
Every large fire
| Million | 2002 | 7,921 | 7,919 |
| Mv Brown | 1989 | 1,475 | 1,468 |
- Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.
Smoke overhead
Smokiest year
2021: 28 days
Heavy smoke on 10 days in 2020, the most of any year.
Last 10 years
8.8 days a year
Medium or heavy smoke, 2016 to 2025.
2025
12 days
Medium or heavy smoke. 16 so far in 2026.
- A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.
NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.
Floods and flood insurance
11 federal flood insurance claims since 1980, with $14,000 paid.
Claims by ZIP code
| 81144 | 6 | $13,000 |
Flood events since 1996
- Heavy Rain4
- Flash Flood2
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).
OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.
River crests
Most severe crest
October 15, 1911
South Fork Rio Grande at South Fork, 9.70 ft
2.70 feet above the 7.0 ft flood stage; major flooding by today’s categories.
Most recent moderate or major crest
October 14, 2025
South Fork Rio Grande at South Fork, 7.63 ft
Moderate flooding.
River gauges
| Rio Grande at Monte Vista | 9.0 | 8.00 ft | 0 |
| Rio Grande near Del Norte | 5.5 | 6.80 ft | 0 |
| South Fork Rio Grande at South Fork | 7.0 | 9.70 ft | 1 |
- Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.
NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.
Drought
In severe drought or worse for 261 of 1,581 months since 1895 (17%); the longest spell lasted 20 months.
261
Months in severe drought or worse since 1895
106
Months in extreme drought
17%
Share of all months, severe or worse
Lowest reading
August 2002
−7.41, extreme drought
Longest severe spell
20 months
March 2002 to October 2003.
Latest month
September 2026
−4.59, extreme drought
- The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.
NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.
Earthquakes and landslides
1 earthquake of magnitude 4 or more within 50 miles since 1900; the largest was magnitude 5.1 in 1966.
3
Magnitude 2.5+ inside the county since 1973
8
Magnitude 3+ within 50 miles since 1973
1
Magnitude 4+ within 50 miles since 1900
1
Magnitude 5+ within 50 miles since 1900
Largest within 50 miles
January 22, 1966
4 km NNW of Lumberton, New Mexico; 32.9 miles away, 6.2 miles deep.
Most recent, magnitude 3 or more
July 5, 2026
Magnitude 3.5
17 km WSW of Los Ojos, New Mexico; 49.3 miles away.
Every earthquake of magnitude 4 or more within 50 miles
| Jan 22, 1966 | 5.1 | 32.9 |
- Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
- Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).
USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.
Mapped landslides
14
Landslides mapped, probable or better
0
With a recorded date
1
Source inventory
Mapped by CO GS (14).
- Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.
USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.
Severe weather and other events
746 events in the National Weather Service record, 733 of them since 1996.
13
Hail reports, 1 inch or larger
0
Hail, 2 inches or larger
0
Damaging gusts, 58 mph+
598
Winter weather events since 1996
0
Heat events since 1996
3
Cold events since 1996
Largest hail
July 12, 1955
1.75 inches
Strongest measured or estimated gust
August 6, 1973
0 mph
More event types since 1996
| Dust storms and dust devils | 1 | 0 |
| Dense fog and smoke | 1 | 0 |
| Debris flows | 1 | 0 |
| Avalanches | 4 | 5 |
Costliest events since 1996
- Jul 1, 2002Wildfire$11.0 million
National Weather Service narrative
Continued from the previous month. The Million Fire was contained on Independence Day, after consuming 9300 acres.
- Jun 19, 2002Wildfire$11.0 million
National Weather Service narrative
The Million Fire started in a rolled up section of illegally dumped sod. It is not known for sure whether the sod spontaneously combusted or was set on fire by a human. The fire spread rapidly with dry conditions and high winds. The 9300 acre fire totally destroyed 11 high end residences. Six residences were heavily damaged, and 2 outbuildings were destroyed. The fire was contained on July 4th. It cost nearly 3 1/2 million dollars to fight the fire.
- Dec 5, 1996High Wind, Alamosa Vicinity / Central San Luis Valley Below 8500 Ft$50,000
National Weather Service narrative
Strong winds occurred from the Sangre de Cristo mountains and east from early morning of the 4th through most of the day, as a powerful jet stream moved across Colorado. Sustained winds of 30 to 50 mph prevailed across the entire area before tapering off by late afternoon of the 5th. Damaging wind gusts began early morning of the 5th. Winds gusts to between 70 and 100 mph in the mountains west of and into Colorado Springs. In El Paso County a 70 foot Ponderosa pine fell on a house, and numerous fences and other outbuildings were damaged. Extensive damage occurred across the Wet Mountain Valley. Numerous power lines, smaller buildings, house and vehicle windows, and large trees…
- Sep 25, 2012Tornado$5,000
National Weather Service narrative
A strong storm produced a non-mesocyclone (landspout) tornado just south of Del Norte. There was minor damage to several properties...including one property which sustained damage to a camper and minor structural damage to the house.
- May 24, 2010High Wind, Del Norte Vicinity / Northern San Luis Valley Below 8500 Ft$4,000
National Weather Service narrative
Gradient winds...gusting up to 75 mph caused damage...especially over portions of El Paso and Pueblo Counties. Several large trees were uprooted in the Monte Vista area in Rio Grande County. A modular building was flipped on its top by the wind in Pueblo West. A few trees were also uprooted in the City of Pueblo. Winds caused power lines to come down in Manitou Springs, which sparked several small grass fires near the Pikes Peak Cog Railway. Three hangers at Peterson Air Force Base were evacuated, and some minor roof damage occurred. Some trees were uprooted in the greater Colorado Springs area. On Fort Carson, eight soldiers were injured when a tent they were setting up blew…
- Jun 6, 2007Wildfire, Alamosa Vicinity / Central San Luis Valley Below 8500 Ft$1,000
National Weather Service narrative
High winds across the San Luis Valley knocked over an electrical transmission line on Lane 6, 10 miles southwest of the Great Sand Dunes. The fire eventually consumed 320 acres of grass and brush as it spread to the northeast. No structures were involved, but the Great Sand Dunes was evacuated until 5 p.m.
- Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.
NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.
Weather records
From Monte Vista 2W, 3.7 miles from the county’s population centre, with records from 1893.
- All-time high
- 96°FJul 30, 2016
- All-time low
- −38°FJan 13, 1963
- Warmest night
- 59°FJul 16, 1944
- Coldest day
- −3°FDec 24, 1990
- Wettest day
- 2.20 inApr 3, 1986
- Snowiest day
- 17.0 inMar 15, 1942
- Hottest year
- 2003mean 44.0°F
- Coldest year
- 2013mean 37.6°F
- Wettest year
- 202416.52 in
- Driest year
- 19503.51 in
- Snowiest season
- 49.6 in1967-68
Median first snow
November 8
Earliest: September 9, 2020
Median last snow
April 18
Latest: May 18, 1971
2 of 70 winters had no measurable snow.
Station Monte Vista 2W (USC00055706), 7,695 ft elevation, 3.7 miles from the population centre. Daily records from 1893 to October 27, 2026; 96.6% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.
NOAA NCEI Global Historical Climatology Network Daily.
Federal disaster declarations
9 since 1953. The most recent: Covid-19 Pandemic, March 28, 2020.
| Mar 28, 2020 | Biological | DR-4498-CO |
| Mar 13, 2020 | Biological | EM-3436-CO |
| Jun 21, 2013 | Fire | FM-5031-CO |
| Sep 5, 2005 | Coastal Storm | EM-3224-CO |
| Jun 19, 2002 | Fire | FM-2428-CO |
| Jun 19, 2002 | Fire | DR-1421-CO |
| Jan 29, 1977 | Drought | EM-3025-CO |
| Jul 6, 1973 | Flood | DR-396-CO |
| Sep 22, 1970 | Flood | DR-293-CO |
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).
OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.
How this compares
Where Rio Grande County stands among 64 counties in Colorado and 3,143 in the United States.
| Tornadoes since 1950 | 3 | 40 / 64 |
| Tornadoes rated F3/EF3 or stronger | 0 | — |
| Tropical cyclones within 50 mi | 0 | — |
| Hurricane-strength passes within 50 mi | 0 | — |
| Wildfire acres since 1984 | 9,397 | 41 / 64 |
| Flood insurance claims | 11 | 30 / 64 |
| Flood insurance paid | $14,000 | 36 / 64 |
| Disaster declarations | 9 | 29 / 64 |
| Flood events since 1996 | 6 | 54 / 64 |
| Hail and wind events since 1996 | 111 | 39 / 64 |
| Winter storm events since 1996 | 598 | 14 / 64 |
| Reported damage since 1996 | $22.1 million | 14 / 64 |
| River crests at major flood stage | 1 | 9 / 64 |
| High tide flooding days a year, last 10 years | 0.0 | — |
| Months in severe drought since 1895 | 261 | 5 / 64 |
| Medium or heavy smoke days a year, last 10 years | 8.8 | 59 / 64 |
| Earthquakes M4+ within 50 mi since 1900 | 1 | 41 / 64 |
| Earthquakes M2.5+ in the county since 1973 | 3 | 20 / 64 |
Neighbouring counties
| Alamosa County | 16 | 0 |
| Archuleta County | 1 | 0 |
| Conejos County | 5 | 0 |
| Mineral County | 1 | 0 |
| Saguache County | 7 | 0 |
Sources and vintage
Every number on this page comes from these public records.
- Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
- Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
- Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
- Storm events NOAA NCEI Storm Events Database, through 2026.
- Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
- Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
- Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00055706.
- River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
- Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
- Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
- Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
- Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.
Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.