EF0 tornado, Venango County, Pennsylvania, July 21, 2026

1. EF065 to 85 mphthis tornado

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

2. EF186 to 110 mph

   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

EF0, preliminary

Date

July 21, 2026

Touchdown

6:37 PM EDT (22:37 UTC)

Lifted

6:38 PM EDT (22:38 UTC)

On the ground

1 minutes

Path length

1.1 miles (1.7 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

County

Venango County

Touchdown point

41.610, -79.805

Lift-off point

41.598, -79.791

Highest wind the damage implies

80 mph

Surveyed by

NWS PBZ

Survey last edited

July 23, 2026

Record number

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

A storm persisted over Crawford County around 6:00pm. This storm intensified into a supercell over the county, before heading into northern Venango County around 6:34pm. With ample low-level rotation as evidenced by local radar, the cell proceeded to touch down at 6:37pm in Diamond, PA. The most evidence of tornadic activity was noted by a hardwood tree down in a tree-line north of town with some tree tops snapped by wind. This was the tied for the strongest damage indicator, with 80mph wind estimated. Some medium sized branches were snapped off trees in Diamond-proper, but most damage observed was from a prior storm which moved through on June 14th, 2026. The damage direction from this tornado was observed from northeast-to-southwest, while the June damage direction was east-to-west. Additional tree damage was observed on the east side of PA-428 before the tornado moved into a wooded area. A large tree was down in a similar direction on Goodwin Road, which signaled the final damage on the tornado track, with estimated wind speeds also at 80mph. This will go down as a 80mph EF-0, that lasted 2 minutes and traveled about one mile.

Venango County now has a total of 10 tornadoes dating back to 1950. The last tornado that occurred in Venango County Pennsylvania was on June 14, 2026. This was an EF-0 tornado that touched down east of Diamond.

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

7 damage points were recorded along this path by NWS PBZ, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 85 mph.

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

The Storm Prediction Center had this point in a Slight Risk, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 20:01 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.

Franklin(Awos) (FKL), 26 km from the path, in the two hours either side.

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

The Pittsburgh radar (KPBZ), 124 km away, was scanning. The volume nearest the touchdown began at 22:39 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.

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

35 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.