EF0 tornado, Jemtland to Connor, Maine, June 8, 2011

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

EF0

Date

June 8, 2011

Touchdown

6:22 PM EDT (22:22 UTC)

Lifted

6:42 PM EDT (22:42 UTC)

On the ground

20 minutes

Path length

8.9 miles (14.4 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

County

Aroostook County

Touchdown point

46.990, -68.180

Lift-off point

46.990, -67.990

Record number

1106081622-01

Severe thunderstorms developed across Aroostook County along a nearly stationary frontal boundary. The storms developed during the late afternoon and continued into the evening. The storms primarily produced damaging winds...though two weak tornadoes also occurred. Heavy rain from training thunderstorms produced localized flash flooding in the Fort Kent area.

An EF0 tornado snapped or uprooted numerous trees along an intermittent path. The tornado initially touched down around 1 mile east-southeast of Little Madawaska Lake. The tornado was embedded within an area of damaging straight line winds...intermittently touching down along its path. The final touch down point was around 4 miles west-northwest of Loring Air Force Base. Most of the damage along the path was uprooted or snapped trees. However...the tornado destroyed an older barn (DI 1, DOD 5) and damaged several farm outbuildings on the Brissette Road. Several other outbuildings were damaged or destroyed at various points along the path. Several homes (DI 2, DOD 2) received damage to shingles and siding. Damage along the path was due to a combination of straight line winds and the intermittent tornado touchdowns.

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

17 minutes of warning. NWS CAR issued a tornado warning for this county at 22:05 UTC, 17 minutes before the tornado touched down, in force until 22:45 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, with a 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 20:00 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.

The Caribou radar (KCBW), 108 km away, was scanning. The volume nearest the touchdown began at 22:22 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 2011 tornado in MaineEvery tornado in Maine since 1950Warnings in force in Maine nowThe forecast where you are

2 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.