EF1 tornado, Sterling to Iliff, Colorado, June 30, 2026

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating, as surveyed

EF1, preliminary

Date

June 30, 2026

Touchdown

8:30 PM MDT (02:30 UTC)

Lifted

8:33 PM MDT (02:33 UTC)

On the ground

3 minutes

Path length

0.1 miles (0.2 km)

Path width

30 yards (27 m)

Deaths

0

Injuries

0

County

Logan County

Touchdown point

40.753, -103.061

Lift-off point

40.754, -103.059

Highest wind the damage implies

105 mph

Surveyed by

NWS BOU

The office's name for it

Iliff TOR

Survey last edited

July 1, 2026

Record number

None yet. SPC numbers 2026 in the spring of 2027.

Quick moving tornado, embedded within a larger area of stronger straightline winds, moved through Iliff, CO right around 830 PM MDT on June 30, 2026. One vacant single wide home was heavily damaged by the swirling winds before lifting to the northeast of town.

Written by NWS BOU in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.

1 damage points were recorded along this path by NWS BOU, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 105 mph.

• Vacant manufactured home was rolled and heavily damaged.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

A supercell thunderstorm produce 2 tornadoes severe hail and wind gusts up to 74 mph.

Tornado reported 1 mile north of US 6. Brief touch down over an open field.

A quick moving tornado, embedded within a larger area of stronger straightline winds, moved through Iliff, CO right around 830 PM MDT on June 30, 2026. One vacant single-wide home was heavily damaged by the swirling winds before lifting to the northeast of |town.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

8 minutes of warning. NWS BOU issued a tornado warning for this county at 02:22 UTC, 8 minutes before the tornado touched down, in force until 02:38 UTC.

The county was under a severe thunderstorm watch, issued at 01:11 UTC and running to 04:48 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Slight Risk. The outlook in force was issued at 01:06 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Sterling (STK), 23 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Cheyenne radar (KCYS), 153 km away, was scanning. The volume nearest the touchdown began at 02:28 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2026 tornado in ColoradoEvery tornado in Colorado since 1950Warnings in force in Colorado nowThe forecast where you are

2 more have been surveyed in the United States that day, so far.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. A survey can be revised, so the rating, the path and the casualties can all still change.

NWS Damage Assessment Toolkit, the record the survey teams file from the damage, and NOAA Storm Prediction Center storm reports. Neither is the official database for 2026, which SPC publishes in the spring of 2027.