A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
![]() Major damage to apartment buildings in Gatineau, Quebec, as a result of an EF3 tornado | |
Formed | September 20, 2018;[1] EDT |
---|---|
Dissipated | September 21, 2018 |
Highest winds |
|
Tornadoes confirmed | 38 |
Max. rating1 | EF3 tornado |
Fatalities | 1 fatality (non-tornadic), 31 injuries |
Damage | $295 million (2018 USD) 350M+ (2023 USD) |
Power outages | 300,000 |
Areas affected | Ohio, Iowa, Minnesota, Wisconsin, Ontario, and Quebec |
Part of the tornado outbreaks of 2018 1Most severe tornado damage; see Enhanced Fujita scale |
A destructive, two-day tornado outbreak affected the Great Lakes region of the United States and the National Capital Region of Canada in late-September. A total of 37 tornadoes were confirmed, including a violent long-tracked high-end EF3 tornado that moved along a 80 km (50 mi) path from near Dunrobin, Ontario to Gatineau, Quebec, and an EF2 tornado in the Nepean sector of Ottawa. The tornadoes in Ottawa-Gatineau were declared one of the ten most significant weather events of 2018 in Canada by the Meteorological Service of Canada.[2]
Numerous tornadoes touched down in Minnesota on the initial day of the outbreak, including a high-end EF2 tornado that caused major damage in Morristown, Minnesota. Other damage occurred in Eastern Ontario due to downburst winds from the severe thunderstorms. One death was reported as a result of straight-line winds that occurred during the outbreak, and 31 people were injured.
Meteorological synopsis
In the Great Lakes region of the United States, a warm front surged in a hot, unstable air mass ahead of a strong cold front on September 20. An enhanced risk of severe weather was issued by the Storm Prediction Center (SPC), including a 10% hatched risk area for tornadoes stretching from southern Minnesota into Wisconsin.[3] Later that evening, a quasi-linear convective system with numerous embedded circulations and bowing line segments produced many tornadoes across southern Minnesota. This included a high-end EF2 tornado that heavily damaged or destroyed many homes in the town of Morristown, Minnesota. Another EF2 tornado damaged the local airport in Faribault. A few tornadoes were also confirmed in Iowa, Wisconsin, and Ohio, and damaging winds from the line of storms also caused significant damage. Embedded downbursts produced destructive straight-line winds of up to 100 mph (160 km/h) during the event. With 25 tornadoes in a matter of hours, this event was Minnesota's third most prolific tornado day on record.[4][5]
The severe weather threat was expected to move eastward to affect southern Ontario and a part of southwestern Quebec the next day.[6] On September 21, a significant severe weather threat was confirmed across southern Ontario and the Outaouais region of Quebec, with the potential for severe thunderstorms and tornadoes noted.[7]
Severe thunderstorm watches and warnings along with wind warnings and special weather statements were issued across parts of Ontario as early as the pre-dawn hours of September 21, which remained in effect until that evening. The warm humid air mass reached Ontario that morning of September 21, along with localized thunderstorms with heavy torrential downpours in most of the areas across southern Ontario and again later that day during the tornado outbreak. Record breaking temperatures across southern Ontario ranged from the high 20s into the low 30s.[8][9] Tornado watches and warnings were issued by that afternoon.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Tornade_de_Gatineau_radar.png/220px-Tornade_de_Gatineau_radar.png)
On the afternoon of September 21, 2018, a localized outbreak of tornadoes impacted eastern Ontario and southern Quebec. During the event, Environment Canada issued numerous tornado warnings as multiple discrete tornadic supercells moved through the area.[10] Between 3:30 p.m. and 6:30 p.m. EDT, seven tornadoes, six of which were strong, caused severe damage in and around the National Capital Region of Canada.
The most significant tornado of the event made a direct strike on the small community of Dunrobin in the west end of Ottawa, then crossed the Ottawa River and struck the southern part of Luskville, the northern part of the Aylmer sector, and the Mont-Bleu residential area in the Hull sector before dissipating near the Pointe-Gatineau neighborhood of the Gatineau sector. The Dunrobin-Gatineau tornado was classified as a high-end, long-tracked EF3 tornado,[11] with peak winds reaching 265 km/h (165 mph).[12] Approximately 25 people were injured by the EF3 tornado, six of those taken to the hospital and five people had life-threatening injuries.[13] At least 200 buildings were damaged and an unknown number were destroyed along the path.[14][15] During the event, the long-tracked EF3 tornado that struck Dunrobin and Gatineau was visible on the horizon behind the Parliament Hill buildings in Ottawa.[16] A still image of the funnel was also captured from a live webcam.[17]
A second damaging tornado, rated EF2, caused significant damage in the Arlington Woods, Craig Henry, and Merivale Road residential areas of Nepean, with peak winds of 220 km/h (135 mph)[18] The tornadoes were preceded by severe thunderstorms throughout Ontario and Quebec.[19][20][21][22] Five other tornadoes also caused minor to moderate damage in the region, though they remained over remote forested areas and mostly damaged trees and power lines.[23][24][25]
The severe weather threat then diminished by late Friday evening, with cool windy conditions.[26]
Confirmed tornadoes
EFU | EF0 | EF1 | EF2 | EF3 | EF4 | EF5 | Total |
---|---|---|---|---|---|---|---|
0 | 10 | 20 | 7 | 1 | 0 | 0 | 38 |
September 20 event
EF# | Location | County / Parish | State | Start Coord. | Time (UTC) | Path length | Max width |
---|---|---|---|---|---|---|---|
EF1 | NE of Middlefield | Geauga | OH | 41°30′06″N 81°04′05″W / 41.5017°N 81.068°W | 18:23–18:31 | 3.18 mi (5.12 km) | 25 yd (23 m) |
A building under construction suffered significant damage and tree limbs were snapped. Outbuildings and a house sustained minor damage as well.[27] | |||||||
EF1 | NE of Middlefield | Geauga, Trumbull | OH | 41°28′53″N 81°01′14″W / 41.4814°N 81.0206°W | 18:31–18:41 | 4.11 mi (6.61 km) | 25 yd (23 m) |
Two single-wide mobile homes were significantly damaged. Otherwise, damage was confined to trees.[28][29] | |||||||
EF1 | Superior | Dickinson, Emmet | IA | 43°25′26″N 94°59′24″W / 43.4238°N 94.9899°W | 22:21–22:28 | 5.07 mi (8.16 km) | 35 yd (32 m) |
Trees were damaged in town, and a garage was destroyed. A two-story office building at the Superior Ethanol plant sustained major roof damage, broken windows, and partial exterior wall failure on the second floor. A weather station at the plant measured a 99 mph (159 km/h) wind gust. Crops were damaged as well.[30][31] | |||||||
EF1 | Northern Granada to S of Huntley | Martin, Faribault | MN | 43°41′53″N 94°21′11″W / 43.698°N 94.353°W | 22:52–22:59 | 6.48 mi (10.43 km) | 220 yd (200 m) |
This tornado touched down in Granada, where a house had its roof blown off, a small and unanchored home was shifted off its foundation and leveled, trees were downed, garages were destroyed, and other homes sustained roof damage. East of town, trees were snapped and sheet metal was strewn through fields.[32][33] | |||||||
EF0 | Garden City | Blue Earth | MN | 44°02′36″N 94°09′59″W / 44.0432°N 94.1665°W | 22:58–23:00 | 1.15 mi (1.85 km) | 70 yd (64 m) |
A weak tornado struck Garden City, downing trees at the fairgrounds. Outside of town, soybean fields were damaged and additional trees were downed.[34] | |||||||
EF0 | SW of Skyline | Blue Earth | MN | 44°06′56″N 94°04′43″W / 44.1155°N 94.0785°W | 23:04–23:05 | 0.84 mi (1.35 km) | 70 yd (64 m) |
A weak tornado caused minor tree damage. A house sustained roof damage from a falling tree.[35] | |||||||
EF1 | Lake Elysian | Waseca | MN | 44°08′24″N 93°45′40″W / 44.1401°N 93.7612°W | 23:19–23:25 | 7.13 mi (11.47 km) | 440 yd (400 m) |
A house sustained roof loss and total destruction of its garage. The home owner was thrown from the garage into his yard, and sustained minor injuries. Outbuildings were damaged, a grain bin was thrown into a field. Other homes sustained minor damage, and trees were damaged as well.[36] | |||||||
EF0 | E of Janesville | Waseca | MN | 44°07′07″N 93°36′10″W / 44.1186°N 93.6027°W | 23:20–23:21 | 0.73 mi (1.17 km) | 20 yd (18 m) |
High-resolution satellite imagery confirmed a brief tornado through corn fields.[37] | |||||||
EF1 | SSW of Waseca | Waseca | MN | 43°59′33″N 93°39′48″W / 43.9926°N 93.6634°W | 23:20–23:30 | 10.88 mi (17.51 km) | 300 yd (270 m) |
A tornado damaged trees and a silo along its path.[38] | |||||||
EF1 | SE of Elysian to NE of Waterville | Waseca, Le Sueur | MN | 44°10′54″N 93°37′50″W / 44.1816°N 93.6305°W | 23:25–23:32 | 7.17 mi (11.54 km) | 330 yd (300 m) |
This tornado struck Waterville, where numerous trees were downed, many of which landed on homes. A one-story home had a large section of its roof torn off as well. Outside of town, tree limbs were snapped.[39][40] | |||||||
EF1 | Eastern Waseca to SW of Medford | Waseca, Steele | MN | 44°04′47″N 93°28′39″W / 44.0797°N 93.4774°W | 23:28–23:37 | 11.13 mi (17.91 km) | 350 yd (320 m) |
A silo and a grain bin were both destroyed. A few sheds and outbuildings, as well as many trees and crops, were damaged.[41][42] | |||||||
EF2 | Southeastern Morristown | Rice | MN | 44°12′35″N 93°27′01″W / 44.2098°N 93.4504°W | 23:31–23:36 | 4.94 mi (7.95 km) | 300 yd (270 m) |
This strong tornado touched down in the southeastern part of Morristown, and caused high-end EF2 damage as it impacted residential areas. Many trees were snapped and numerous homes were badly damaged, some of which lost roofs and exterior walls. One home was left with only a few walls standing. The tornado continued to the northeast outside of town, where a turkey barn and outbuildings were destroyed. Crops were damaged as well.[43] | |||||||
EF1 | N of Morristown to NE of Roberds Lake | Rice | MN | 44°15′10″N 93°26′17″W / 44.2527°N 93.438°W | 23:35–23:44 | 8.57 mi (13.79 km) | 440 yd (400 m) |
Many outbuildings were destroyed, and numerous trees were snapped or uprooted along the path. A shed was crushed by a large tree.[44] | |||||||
EF1 | Owatonna | Steele | MN | 44°03′34″N 93°19′55″W / 44.0595°N 93.332°W | 23:35–23:42 | 8.12 mi (13.07 km) | 300 yd (270 m) |
Southwest of town, crops and trees were damaged and a barn was destroyed. In Owatonna, power poles and power lines were snapped, a large factory building sustained minor exterior damage, homes had shingles ripped off, and many trees were snapped or uprooted, some of which landed on homes.[45] | |||||||
EF2 | Northwestern Faribault | Rice | MN | 44°18′13″N 93°20′41″W / 44.3036°N 93.3448°W | 23:37–23:40 | 2.95 mi (4.75 km) | 600 yd (550 m) |
Significant damage occurred at the Faribault Airport, where several hangars were destroyed and roughly 80 airplanes were damaged or destroyed. The footings of one hangar were ripped from its frame. Hundreds of trees were downed, and outbuildings were damaged as well.[46] | |||||||
EF1 | Roberds Lake | Rice | MN | 44°20′01″N 93°21′46″W / 44.3336°N 93.3628°W | 23:40–23:42 | 1.57 mi (2.53 km) | 150 yd (140 m) |
Numerous trees were snapped or uprooted, some of which landed on homes and cabins. Outbuildings were destroyed, and one home sustained broken windows and considerable roof damage.[47] | |||||||
EF1 | N of Medford to E of Faribault | Rice | MN | 44°11′47″N 93°14′16″W / 44.1965°N 93.2379°W | 23:40–23:47 | 9.06 mi (14.58 km) | 500 yd (460 m) |
Outbuildings, grain bins, machine sheds, and silos were damaged or destroyed along the path. Homes had portions of their roofs torn off, and many trees were snapped or uprooted.[48] | |||||||
EF1 | S of Nerstrand | Rice, Goodhue | MN | 44°14′48″N 93°07′51″W / 44.2466°N 93.1307°W | 23:44–23:50 | 7.17 mi (11.54 km) | 300 yd (270 m) |
A few sheds and outbuildings, as well as numerous corn and soy bean fields, were damaged. A silo lost a roof panel.[49][50] | |||||||
EF1 | N of Faribault | Rice | MN | 44°21′04″N 93°15′57″W / 44.351°N 93.2657°W | 23:44–23:48 | 4.66 mi (7.50 km) | 440 yd (400 m) |
Numerous large trees were damaged along the path.[51] | |||||||
EF1 | S of Dundas | Rice | MN | 44°21′54″N 93°18′13″W / 44.3649°N 93.3035°W | 23:45–23:50 | 5.75 mi (9.25 km) | 440 yd (400 m) |
This tornado damaged power poles and trees, twisted road signs, and left a convergent pattern in a corn field.[52] | |||||||
EF0 | Dundas | Rice | MN | 44°24′05″N 93°17′35″W / 44.4013°N 93.293°W | 23:46–23:51 | 5.53 mi (8.90 km) | 75 yd (69 m) |
Pine trees were uprooted and billboards were destroyed to the southwest of town. In Dundas, numerous trees were snapped or uprooted.[53] | |||||||
EF1 | SE of Northfield | Rice, Goodhue | MN | 44°24′54″N 93°07′36″W / 44.4149°N 93.1268°W | 23:52–23:57 | 5.31 mi (8.55 km) | 550 yd (500 m) |
A pizza restaurant housed in a large barn was leveled by this high-end EF1 tornado. Other outbuildings were damaged or destroyed, and trees were damaged.[54][55] | |||||||
EF0 | S of Wanamingo | Goodhue | MN | 44°16′02″N 92°54′02″W / 44.2672°N 92.9006°W | 23:56–00:05 | 8.72 mi (14.03 km) | 250 yd (230 m) |
Corn crop was damaged, and tree limbs were snapped, some of which pierced the roof of a machine shed.[56] | |||||||
EF1 | Southern Cannon Falls | Goodhue | MN | 44°28′38″N 92°55′14″W / 44.4771°N 92.9206°W | 00:01–00:03 | 1.86 mi (2.99 km) | 440 yd (400 m) |
Numerous trees were snapped or uprooted, with many falling on homes and vehicles.[57] | |||||||
EF0 | N of Cannon Falls | Dakota, Goodhue | MN | 44°32′31″N 92°58′08″W / 44.5419°N 92.9688°W | 00:02–00:05 | 3.19 mi (5.13 km) | 70 yd (64 m) |
Roofing material was removed from a commercial facility, and a convergent pattern was noted in crops.[58][59] | |||||||
EF0 | S of New Trier | Dakota | MN | 44°34′58″N 92°58′30″W / 44.5829°N 92.975°W | 00:04–00:08 | 4.61 mi (7.42 km) | 220 yd (200 m) |
Outbuildings were damaged at several farms.[60] | |||||||
EF0 | NE of Zumbrota | Goodhue, Wabasha | MN | 44°20′07″N 92°39′04″W / 44.3353°N 92.6512°W | 00:09–00:14 | 6.22 mi (10.01 km) | 150 yd (140 m) |
This tornado struck several farms, destroying grain bins and outbuildings.[61][62] [63] | |||||||
EF0 | Prairie Island | Goodhue, Pierce | MN, WI | 44°38′18″N 92°40′43″W / 44.6382°N 92.6787°W | 00:16–00:19 | 3.23 mi (5.20 km) | 100 yd (91 m) |
This brief, weak tornado caused minor damage.[64][65] | |||||||
EF0 | E of Ellsworth | Pierce | WI | 44°43′54″N 92°28′26″W / 44.7318°N 92.4738°W | 00:27–00:29 | 1.67 mi (2.69 km) | 140 yd (130 m) |
A barn, sheds, trees and outbuildings were damaged.[66] |
September 21 event
EF# | Location | County / Municipality | Province | Start Coord. | Time (UTC) | Path length | Max width |
---|---|---|---|---|---|---|---|
EF2 | E of Mont-Laurier | La Vallée-de-la-Gatineau | QC | 46°39′08″N 75°57′39″W / 46.6522°N 75.9608°W | 19:30 | 19.4 km (12.1 mi) | 1,200 m (1,300 yd) |
This tornado tracked through densely forested areas near the Baskatong Reservoir, snapping trees and damaging power lines.[67][68] | |||||||
EF2 | N of Otter Lake | Pontiac | QC | 45°54′37″N 76°29′05″W / 45.9103°N 76.4848°W | 19:50 | 12.6 km (7.8 mi) | 320 m (350 yd) |
A tornado tracked through densely forested areas, downing numerous trees along its path.[67][68] | |||||||
EF2 | Calabogie to White Lake | Renfrew | ON
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