The 2020 Lake Michigan hurricane season was more active than the 2016 Season.


Tropical Storm Anita

Tropical storm (SSHWS)
Marco 6 oct 2008.jpg Tropical Storm Anita (Great Lakes-2020).JPG
Duration June 21 – June 25
Peak intensity 60 mph (95 km/h) (1-min)  993 mbar (hPa)

Tropical Storm Anita was a Strong Tropical Storm which brought considerable flooding to Gary, Indiana and Waukegan, Wisconsin.

Tropical Storm Bill

Tropical storm (SSHWS)
20050724GERT.jpg Tropical Storm Bill (Great Lakes-2020).JPG
Duration June 30 – July 3
Peak intensity 45 mph (75 km/h) (1-min)  998 mbar (hPa)

Tropical Storm Bill was a weak, somewhat disorganized storm that spawned a half mile wide EF-3 tornado in Madison, Wisconsin.

Hurricane Claudia

Category 1 hurricane (SSHWS)
HurricaneNate.jpg Hurricane Claudia (Great Lakes-2020).JPG
Duration July 17 – July 23
Peak intensity 85 mph (140 km/h) (1-min)  980 mbar (hPa)

Hurricane Claudia was a strong Category-1 hurricane which caused considerable flooding and an outbreak of Twenty-Four Tornadoes (One a weak EF-4) in the U-P of Michigan after a landfall as a 65 mph Tropical Storm.

Tropical Storm Dan

Tropical storm (SSHWS)
TropicalStormLee05.jpg Tropical Storm Dan (Great Lakes-2020).JPG
Duration August 1 – August 3
Peak intensity 40 mph (65 km/h) (1-min)  1000 mbar (hPa)

Tropical Storm Dan was a weak Tropical Storm which, despite it's Center of Circulation staying over Lake Michigan it's entire life, most of it's sheared deep convection caused near-extensive flooding in Michigan, with a near record monthly rainfall achieved in Detroit.

Hurricane Elaine

Category 1 hurricane (SSHWS)
Hurricane Karl (1998) - Cropped.JPG Hurricane Elaine (Great Lakes-2020).JPG
Duration August 6 – August 12
Peak intensity 90 mph (150 km/h) (1-min)  970 mbar (hPa)

Hurricane Elaine was a Strong Category-1 Hurricane which caused flooding in Milwaukee, Wisconsin and Southern Canada and also produced Hurricane-Force winds in the U-P of Michigan

Hurricane Franklin

Category 2 hurricane (SSHWS)
Hurricane Bertha (2008) - Cropped.JPG Hurricane Franklin (Great Lakes-2020).JPG
Duration August 25 – September 3
Peak intensity 110 mph (175 km/h) (1-min)  961 mbar (hPa)

Hurricane Franklin was a Strong Category-2 Hurricane which caused extensive flooding and Hurricane-Force winds in the U-P of Michigan.

Subtropical Storm Gillian

Subtropical storm (SSHWS)
Subtropical Invest.JPG Subtropical Storm Gillian (Great Lakes-2020).JPG
Duration August 31 – September 2
Peak intensity 40 mph (65 km/h) (1-min)  999 mbar (hPa)

Subtropical Storm Gillian was a small Subtropical Cyclone which only caused some flooding in michigan as a Dying Depression.

Hurricane Harold

Category 4 hurricane (SSHWS)
IvanSpace.jpeg Hurricane Harold (Great Lakes-2020).JPG
Duration September 10 – September 21
Peak intensity 130 mph (215 km/h) (1-min)  945 mbar (hPa)

Hurricane Harold was a low-end Category-4 Hurricane which caused Significant damage in Northern Indiana/Southwestern Michgan.

Hurricane Ilsa

Category 3 hurricane (SSHWS)
Hurricane Gert (1999) - Cropped - 4.JPG Hurricane Ilsa (Great Lakes-2020).JPG
Duration September 15 – October 1
Peak intensity 115 mph (185 km/h) (1-min)  954 mbar (hPa)

Hurricane Ilsa was a weak Major Hurricane which, due to it's somewhat slow moving, caused Extreme Flooding and Hurricane-Force winds in Wisconsin, the U-P of Michigan and parts of Southern Canada.

Tropical Storm Joey

Tropical storm (SSHWS)
Subtropical Storm One of 1979.JPG Tropical Storm Joey (Great Lakes-2020).JPG
Duration September 20 – September 24
Peak intensity 70 mph (110 km/h) (1-min)  988 mbar (hPa)

Tropical Storm Joey was a strong Tropical Storm which caused Flooding and an Outbreak of 17 Tornadoes in Northern Michigan.

Hurricane Kassie

Category 1 hurricane (SSHWS)
Hurricane Gloria of 1979.JPG Hurricane Kassie (Great Lakes-2020).JPG
Duration September 30 – October 6
Peak intensity 85 mph (140 km/h) (1-min)  979 mbar (hPa)

Hurricane Kassie was a Strong Category-1 Hurricane which caused flooding, some Hurricane-Force winds and an Outbreak of Twenty-One Tornadoes in Northern Michigan and Southern Canada.

Tropical Storm Lee

Tropical storm (SSHWS)
Tropical Storm Barry (1989).jpg Tropical Storm Lee (Great Lakes-2020).JPG
Duration October 19 – October 24
Peak intensity 65 mph (100 km/h) (1-min)  989 mbar (hPa)

Tropical Storm Lee was a Strong Tropical Storm that caused moderate flooding in and around Milwaukee, Wisconsin.

Hurricane Mindy

Category 2 hurricane (SSHWS)
Hurricane Bertha (2008) - Cropped - 1.JPG Hurricane Mindy (Great Lakes-2020).JPG
Duration October 31 – November 7
Peak intensity 105 mph (165 km/h) (1-min)  962 mbar (hPa)

Hurricane Mindy was a large, Mid-Strength Category-2 Hurricane that caused a large swath of Hurricane-Force winds as far south as South Bend, Indiana and as far north as the border of Canada at it's peak.

Hurricane Nolan

Category 1 hurricane (SSHWS)
Josephine2002.jpg Hurricane Nolan (Great Lakes-2020).JPG
Duration November 11 – November 16
Peak intensity 75 mph (120 km/h) (1-min)  987 mbar (hPa)

Hurricane Nolan was the last storm of the season, it was briefly a Weak Category-1 Hurricane that impacted the U-P of Michigan as a weakening Tropical Storm.

It caused flooding and an outbreak of Twenty Tornadoes.


wikipedia:Saffir-Simpson Hurricane Scale

Accumulated Cyclone Energy (ACE) Rating

ACE (104 kt2) – Storm: Source
1 20.0 Harold 12 3.71 Bill
2 15.0 Ilsa 13 2.50 Dan
3 11.7 Franklin 14 1.72 Gillian
4 10.0 Mindy 15 0.00 Storm
5 7.13 Elaine 16 0.00 Storm
6 6.60 Kassie 17 0.00 Storm
7 6.48 Claudia 18 0.00 Storm
8 5.99 Nolan 19 0.00 Storm
9 5.22 Joey 20 0.00 Storm
10 4.75 Lee 21 0.00 Storm
11 4.20 Anita 22 0.00 Storm

ACE is the result of a storm's winds multiplied by how long it lasted for, so storms or subtropical storms (Originally not included up until 2012) that at lasted a long time , as well as particularly strong hurricanes , have higher ACE totals. Tropical Depressions are not included in season total.