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2017 Hurricane Irma tornado outbreak
Type: Unknown
Active: August 29 - 30, 2017
Duration of tornado outbreak1: 1 day
Maximum rated tornado2: EF2 tornado
Highest winds Unknown
Tornadoes confirmed: 39
Damage: $205 million (2017 USD)
Injuries: Unknown
Fatalities: 6
Areas affected: Unknown

1Time from first tornado to last tornado
2Most severe tornado damage; see wikipedia:Enhanced Fujita scale

The 2017 Hurricane Irma tornado outbreak was a destructive tornado outbreak that occurred as a result of Hurricane Irma moving into the Gulf Coast and interacting with a frontal zone to its north over the Great Lakes, producing 39 tornadoes in the process, most of them weak. Several injuries, and 12 deaths were recorded due to the outbreak, and $205 million was done in damages by the event.


Synopsis

Confirmed
Total
Confirmed
EF0
Confirmed
EF1
Confirmed
EF2
Confirmed
EF3
Confirmed
EF4
Confirmed
EF5
39 24 12 3 0 0 0


Hurricane Irma developed off the Cape Verde islands nearly 2 weeks before the outbreak happened, and had reached a peak intensity as a category 4 hurricane about a week earlier. As the hurricane moved into the Gulf of Mexico, it began to interact with the outflow from a frontal system that was forming in the Gulf off Florida. The next day as the system made landfall, supercells began developing in the storms eyewall, allowing for several tornadoes to touch down as a result. Among these were 3 EF2's, which all occurred over Mississippi and Alabama, where the storm initially crossed the shore, and all were recorded within a few hours of the landfall at category 2 intensity, whilst the supercells had most strength. Continuing to move northeast, the storm was eventually absorbed into the frontal zone, triggering September 3 - 4, 2017 tornado outbreak in the process. Once Irma had degraded to a remnant low, the tornadoes stopped, and a few hours later, the severe thunderstorms dissipated, having no favourable conditions to feed off.

List of tornadoes

August 29

EF# State Times (UTC) Width Comments
EF0 Mississippi 1035 - 1039 35 meters Brief tornado with little known impact.
EF0 Mississippi 1105 - 1108 42 meters Brief tornado with little known impact.
EF1 Mississippi 1135 - 1140 80 meters Brief tornado that destroyed several outhouses.
EF0 Mississippi 1147 - 1150 45 meters Brief tornado with little known impact.
EF0 Mississippi 1157 - 1205 105 meters Significant tornado that tossed cars off the road and damaged several hundred trees.
EF0 Mississippi 1205 - 1210 50 meters Brief tornado with little known impact.
EF1 Mississippi 1217 - 1221 60 meters Brief tornado that did significant roof damage.
EF0 Mississippi 1235 - 1240 80 meters Brief tornado with little known impact.
EF2 Mississippi 1035 - 1039 35 meters See section below - A significant tornado struck parts of George and Lucedale. 4 fatalities.
EF0 Mississippi 1305 - 1310 90 meters Brief tornado with some significant tree damages reported.
EF0 Alabama 1345 - 1349 38 meters Brief tornado with little known impact.
EF2 Alabama 1402 - 1410 105 meters See section below - a significant tornado hit parts of Semes. 1 death.
EF2 Mississippi 1439 - 1444 35 meters See section below - A brief, but significant tornado struck Latimer.
EF0 Alabama 1455 - 1500 90 meters Brief tornado that caused minor roof damage, and knocked over a few trees.
EF0 Mississippi 1525 - 1529 54 meters Brief tornado with little known impact.
EF1 Alabama 1645 - 1652 100 meters Significant tornado that pushed cars off highways. 1 fatality when a car was pushed into a lamppost.
EF0 Alabama 1710 - 1714 75 meters Brief tornado with little known impact.
EF0 Alabama 1735 - 1740 65 meters Brief tornado with little known impact.
EF1 Alabama 1805 - 1810 135 meters Brief tornado that caused major tree damage.
EF1 Alabama 1835 - 1842 50 meters Brief tornado with little known impact.
EF0 Alabama 1905 - 1909 45 meters Brief tornado with little known impact.
EF1 Alabama 1955 - 1959 90 meters Brief tornado with significant roof damages.
EF0 Alabama 2027 - 2030 30 meters Brief tornado with little known impact.
EF0 Georgia 2140 - 2144 60 meters Brief tornado with little known impact.
EF1 Georgia 2230 - 2237 93 meters Brief tornado with moderate damage.
EF0 Alabama 2305 - 2309 70 meters Brief tornado with little known impact.

August 30

EF# State Times (UTC) Width Comments
EF0 Georgia 0035 - 0038 42 meters Brief tornado with little known impact.
EF1 Georgia 0110 - 0115 85 meters Brief tornado that caused some roof damage.
EF0 Tennessee 0205 - 0207 25 meters Brief tornado with little known impact.
EF1 Alabama 0255 - 0305 42 meters Significant, long lasting tornado that snapped or uprooted several trees, and caused significant roof damages.
EF0 Alabama 0345 - 0348 49 meters Brief tornado with little known impact.
EF1 Georgia 0421 - 0427 102 meters Significant, damaging tornado that badly compromised the roofs of some buildings. 3 injuries.
EF0 Tennessee 0435 - 0438 50 meters Brief tornado with little known impact.
EF0 Georgia 0501 - 0505 40 meters Brief tornado with little known impact.
EF0 Alabama 0550 - 0553 65 meters Brief tornado with little known impact.
EF0 Tennessee 0612 - 0616 42 meters Brief tornado with little known impact.
EF1 Georgia 0652 - 0658 96 meters Significant tree damage reported.
EF1 Georgia 0714 - 0718 67 meters Brief tornado with some severe roof damage.
EF0 Tennessee 0729 - 0730 Unknown Brief tornado touchdown reported.

Notable tornadoes

George - Lucedale, Mississippi

EF2 tornado (NWS)
BowlingGreenEF2.jpg
Duration 1245 – 1305
Intensity 195 km/h (120 mph) (1-min)

This tornado touched down near the initial landfall location shortly before the eye made landfall. It first touched down on the outer edge of George, before heading out towards Lucedale, tearing hundreds of roofs off of buildings, ripping trees from the ground, tossing cars off roads, and shredding power lines in the process. 4 people were killed during this tornado, one in a car which was later found mangled against a brick wall 100 feet from where it was when it was tossed, and the other 3 as a result of a live power line being torn up and tossed onto a home, having gone through the window. $65 million in damage was done by this tornado in total.


Semes, Alabama

EF2 tornado (NWS)
EvergreenVA2016EF3.png
Duration 1402 – 1410
Intensity 185 km/h (115 mph) (1-min)

This brief tornado touched down not long after the eye made landfall, and destroyed a mobile home park in the process. Numerous homes also had their roofs either badly damaged, or torn off completely by the force of the tornado. 1 person died in the tornado, with damages totaling to $105 million from the event in total.

Latimer, Mississippi

EF2 tornado (NWS)
Windsor, Co Tornado.jpg
Duration 1439 – 1444
Intensity 205 km/h (130 mph) (1-min)

This tornado was the final of the strong events following the landfall of Hurricane Irma. The tornado lasted 5 minutes, and tore wooden buildings apart, as well badly compromising the roofs of well built structures, as well as moving heavy vehicles. Rating disputed, and this event was considered EF3 by some survey teams. Officially rated high end EF2.

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