Evanston

Every recorded tornado

1. Injuries and deaths are for the tornado’s whole path, which may extend beyond this area.
2. 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.

Every large fire

1. 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

1. 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.

Flood insurance figures are for Uinta County, the county that contains Evanston.

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

River gauges in Uinta County, the county that contains Evanston.

River gauges

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.

The drought index is for Uinta County, the county that contains Evanston.

1. 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.

Every earthquake of magnitude 4 or more within 50 miles

1. 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 city centre.
2. 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

Landslides mapped in Uinta County.

Mapped by WY WSGS (1,679), UT GRC (44).

1. 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.

More event types since 1996

Costliest events since 1996

1. Feb 18, 2026Winter Weather, Uinta$4.5 million
   National Weather Service narrative

   Wyoming Highway Patrol in addition to other law enforcement and first responders reported that a multi-vehicle accident occurred on I-80 near Evanston at mile marker 18 at approximately 3:00 PM 2/18/26. The crashes are said to have happened more or less simultaneously, involving 32 vehicles (20 semi trucks, 12 passenger vehicles), which blocked and closed both the westbound and eastbound lanes. The interstate was closed from mile marker 6 to mile marker 34, lasting from roughly 3:28 PM until 4:00 AM the following morning. As a result of the collisions, 2 fatalities were confirmed, as were 22 injuries, 3 of which required helicopter transportation to Utah emergency facilities.…

2. Jul 28, 2016Wildfire, Uinta$500,000
   National Weather Service narrative

   The Tokewanna Fire was discovered on the afternoon of July 28, about 15 miles south of Mountain View, Wyoming. The fire burned approximately 1,300 acres and destroyed 8 structures in the Tokewanna Estates Subdivision. The fire forced the evacuation of 140 homes and the Uinta County Youth Camp, and also closed portions of Highways 271 and 410. One firefighter on the wildfire suffered burns from the fire. The fire was 100% contained as of 6 p.m. MDT Saturday, August 6.

3. Aug 1, 2016Wildfire, Uinta$500,000
   National Weather Service narrative

   The Tokewanna Fire was discovered on the afternoon of July 28, about 15 miles south of Mountain View, Wyoming. The fire burned approximately 1,300 acres and destroyed 8 structures in the Tokewanna Estates Subdivision. The fire forced the evacuation of 140 homes and the Uinta County Youth Camp, and also closed portions of Highways 271 and 410. One firefighter on the wildfire suffered burns from the fire. The fire was 100% contained as of 6 p.m. MDT Saturday, August 6.

4. Nov 16, 2024Winter Weather, Uinta$100,000
   National Weather Service narrative

   Snow Squall. Wyoming DOT and the public reported Interstate 80 Westbound closure near milepost 13 due to multiple crashes and a pileup as a result of a snow squall. In the hour preceding the incidents WYDOT RWIS sensors at West Divide and Painter recorded heavy snow and visibility down to between one quarter and one eighth of a mile with an accompanying flash freeze. Gusty winds did not accompany these squalls. Time is approximate.

5. Jun 6, 2010Flood$10,000
   National Weather Service narrative

   Flooding occurred on both the Black's Fork and the Smith's Fork Rivers, with flooding reported near both Robertson and Mountain View, Wyoming, though not much damage was reported. The Black's Fork river gauge rose the most during this event, peaking at 3642 cfs.

6. Oct 11, 2008Winter Storm, Uinta$8,000
   National Weather Service narrative

   Evanston received 3.5 inches of new snow, and several large trees were knocked down outside Evanston, blocking some county roads.

7. Jul 3, 2023Thunderstorm Wind$5,000
   National Weather Service narrative

   Multiple trees were downed approximately 11 miles south southwest of Altamont.

8. Jul 3, 2023Thunderstorm Wind$250
   National Weather Service narrative

   A school crossing sign was blown off of a pole.

1. 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.

All-time high

99°FJul 7, 1985

All-time low

−38°FFeb 12, 1905

Warmest night

65°F3 times, most recently Jul 27, 2026

Coldest day

−17°FDec 21, 1990

Wettest day

2.63 inMay 30, 1924

Snowiest day

20.0 in2 times, most recently Mar 26, 1920

Hottest year

2025mean 46.1°F

Coldest year

1949mean 36.0°F

Wettest year

189919.51 in

Driest year

19884.26 in

Snowiest season

121.9 in1898-99

Station Evanston 1 E (USC00483100), 6,860 ft elevation, 1.0 miles from the city centre. Daily records from 1890 to September 30, 2026; 86.0% 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.

Declarations for Uinta County.

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.

• 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 USC00483100.
• 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.