The 2020/21 Baltic hurricane season was an average season, featuring the formation of 15 (sub)tropical cyclones, all but one of which became a named storm. Out of all tropical storms, 6 have became hurricanes, 3 of them becoming major hurricanes. The season officialy started on September 1, 2020 and ended on March 31, 2021, though the first storm of the season, Tropical Storm Ana formed off-season - on July 27. This was the first season in which it was applied the tropical cyclones naming system and first in which the BSWS took control of the basin.
Seasonal forecasts[]
| Source | Date | Named storms |
Hurricanes | Major hurricanes |
| Average | 14.44 | 7.07 | 3.22 | |
| BSWS | July 24, 2020 | 12-16 | 5-8 | 2-4 |
| PHWC | September 25, 2020 | 13-18 | 4-7 | 1-3 |
| GLFC | October 2, 2020 | 12-17 | 5-9 | 1-4 |
| GHC | October 6, 2020 | 13-15 | 5-6 | 2-3 |
| BMS | October 7, 2020 | 14-17 | 7-10 | 3-5 |
| LNHA | October 16, 2020 | 6-9 | 2-4 | 0-2 |
| LNHA | October 23, 2020 | 7-11 | 2-5 | 0-3 |
| MHC | October 30, 2020 | 12-14 | 5-8 | 1-3 |
| NSWS | November 2, 2020 | 7-11 | 3-5 | 1-2 |
| PHWC | November 5, 2020 | 12-16 | 5-9 | 1-3 |
| NSWS | November 9, 2020 | 13-16 | 4-7 | 1-2 |
| CAWS | November 15, 2020 | 15-18 | 6-9 | 2-5 |
| NSWS | November 18, 2020 | 11-13 | 6-8 | 2-3 |
| PHWC | December 1, 2020 | 12-15 | 3-7 | 1-2 |
| GLFC | December 2, 2020 | 13-17 | 6-9 | 2-4 |
| FINHC | December 3, 2020 | 9-12 | 3-5 | 1-2 |
| PHWC | December 10, 2020 | 12-15 | 3-6 | 0-2 |
| BSWS | December 15, 2020 | 12-15 | 4-7 | 1-3 |
| JHHC | December 16, 2020 | 8-14 | 3-5 | 2 |
| FGHT | December 17, 2020 | 9-11 | 2-3 | 0 |
| ATLAS | December 21, 2020 | 16-22 | 7-9 | 4-5 |
| LWMC | December 22, 2020 | 18-22 | 6-9 | 3-5 |
| ACSF | December 24, 2020 | 22-27 | 16-19 | 11 |
| NSWS | December 25, 2020 | 11-14 | 4-6 | 1-2 |
| ALETA | December 29, 2020 | 14-17 | 6-8 | 2-3 |
| CWCB | December 30, 2020 | 12-14 | 4-8 | 1-3 |
| HFSN | January 1, 2021 | 12-15 | 5-8 | 3-5 |
| PIPC | January 2, 2021 | 13-15 | 5-6 | 3-5 |
| KKWS | January 4, 2021 | 15 | 7 | 3 |
| FINHC | January 9, 2021 | 13-16 | 6-9 | 3-6 |
| NSHHSW | January 10, 2021 | 11 | 8 | 6 |
| CWCB | January 14, 2021 | 11-13 | 5-7 | 2-3 |
| LWC | January 19, 2021 | 19 | 12 | 5 |
| ILHO | January 21, 2021 | 13-17 | 7-11 | 2-4 |
| FGHT | January 21, 2021 | 25-27 | 12-15 | 2-5 |
| HFSN | January 27, 2021 | 20-23 | 8-10 | 3-5 |
| Actual Activity | 14 | 6 | 3 |
WRITE YOUR OWN FORECASTS IN COMMENTS AND I WILL ADD THEM HERE!
On May 14th, the Baltic Sea Weather Service released their July Outlook, calling for a potentially above average season, with 12-16 named storms, 5-8 hurricanes, and 2-4 major hurricanes. Two months later, on September 25th, the Poxy Hurricane Warning Center released their outlook, calling for an above-average season, with 13-18 named storms, 4-7 hurricanes, and 1-3 major hurricanes, citing warmer than average sea-surface temperatures. One week later, on October 2nd, Great Lakes Forecasting Center published their outlook, calling for a potentially above average season with 12-17 named storms, 5-9 hurricanes and 1-4 major hurricanes. Four days later, GHC issued their outlook, calling for an average season with 13-15 named storms, 5-6 hurricanes and 2-3 major hurricanes. A day later, at October 7th, BMS released their outlook, calling for an above-average season containing 14-17 named storms, 7-10 hurricanes and 3-5 major hurricanes. Later, at October 16, LNHA published their outlook, calling for a below average season with only 6-9 named storms, 2-4 hurricanes and 0-2 major hurricanes. A week later, at October 23, LNHA updated their forecast, calling for 7-11 named storms, 2-5 hurricanes and 0-3 major hurricanes. Another week later, at October 30, MHC issued their outlook, calling for a slightly below average season containing 12-14 named storms, 5-8 hurricanes and 1-3 major hurricanes. At November 2, NSWS released their forecast, also calling for a below average season with 7-11 named storms, 3-5 hurricanes and 1-2 major hurricanes. Three days later, at November 5, PHWC updated their forecast, calling for a rather average season, but with a 25% chance of an above-average season, with 12-16 named storms, 5-9 hurricanes and 1-3 major hurricanes. Later, on November 9, NSWS also updated their forecast, calling for a slightly above-average season containing 13-16 named storms, 4-7 hurricanes and 1-2 major hurricanes. On November 15, CAWS released their outlook, calling for an above-average season with 15-18 named storms, 6-9 hurricanes and 2-5 major hurricanes. Three days later, on November 18, NSWS once again updated their forecast, calling for a slightly below average season with 11-13 named storms, 6-8 hurricanes and 2-3 major hurricanes, and adding that they not expect Category 5 hurricanes this season. Later, on December 1, the PHWC updated their forecast again, calling for an average or a slightly below average season with 12-15 named storms, 3-7 hurricanes and 1-2 major hurricanes. A day later, on December 2, the GLFC released an updated forecast, calling for an above-average season containing 13-17 named storms 6-9 hurricanes and 2-4 major hurricanes. Another day later, on December 3, the FINHC issued their outlook, calling for a below-average season with 9-12 named storms, 3-5 hurricanes, 1-2 major hurricanes and no Category 5 hurricanes. A week later, on December 10, the PHWC released the next update of their forecast, calling for an average or a slightly below-average season with 12-15 named storms, 3-6 hurricanes and 0-2 major hurricanes. On December 15, the BSWS issued their December outlook, calling for an average or a slightly below-average season containing 12-15 named storms, 4-7 hurricanes and 1-3 major hurricanes. A day later, on December 16, the JHHC released their forecast, calling for a below-average season with 8-14 named storms, 3-5 hurricanes and 2 major hurricanes. Another day later, the FGHT released their outlook, calling for a well below-average season containing 9-11 named storms, 2-3 hurricanes and no major hurricanes. On December 21, the ATLAS released their forecast, calling for a well above-average season with 16-22 named storms 7-9 hurricanes and 4-5 major hurricanes. A day later, on December 22, the LWMC released their prediction, calling, like ATLAS, for a well above-average season and expecting 18-22 named storms, 6-9 hurricanes and 3-5 major hurricanes. On December 24, the ACSF issued their outlook, calling for a hyperactive season with 22-27 named storms, 16-19 hurricanes, 11 major hurricanes and 4 Category 5 hurricanes, citing a predicted extremely high water temperatures. A day later, on December 25, the NSWS released their Christmas outlook, calling for a below-average season containing 11-14 named storms, 4-6 hurricanes, 1-2 major hurricanes and no Category 5 hurricanes. On December 29, the ALETA issued their outlook, calling for an average or a slightly above-average season with 14-17 named storms, 6-8 hurricanes and 2-3 major hurricanes. A day later, on December 30, the CWCB released their forecast, expecting 12-14 named storms, 4-8 hurricanes and 1-3 major hurricanes. On the first day of 2021, the HFSN released their forecast, calling for 12-15 named storms, 5-8 hurricanes and 3-5 major hurricanes. A day later, on January 2, the PIPC issued their outlook, calling for an average season with 13-15 named storms, 5-6 hurricanes and 3-5 major hurricanes. On January 4, the KKWS released their outlook, calling for an average season containing 15 named storms, 7 hurricanes and 3 major hurricanes. A few days later, on January 9, the FINHC released their updated forecast, calling for 13-16 named storms, 6-9 hurricanes, 3-6 major hurricanes and 2 Category 5 hurricanes. One day later, on January 10, the NSHHSW issued their outlook, calling for a below-average season with 11 named storms, 8 hurricanes and 6 major hurricanes. On January 14, the CWCB updated their forecast, calling for 11-13 named storms, 5-7 hurricanes and 2-3 major hurricanes. A few days later, on January 19, the LWC released their outlook, calling for an above-average season with 19 named storms, 12 hurricanes and 5 major hurricanes. Two days later, on January 21, the ILHO issued their forecast, calling for 13-17 named storms, 7-11 hurricanes and 2-4 major hurricanes. Later on the same day, the FGHT updated their outlook, calling for a hyperactive season containing 25-27 named storms, 12-15 hurricanes and 2-5 major hurricanes. A few days later, on January 27, the HFSN released their updated outlook, calling for an extremely active season with 20-23 named storms, 8-10 hurricanes and 3-5 major hurricanes.
Season summary[]
Systems[]
Tropical Storm Ann[]
| Tropical storm (SSHWS) | |
  | |
| Duration | July 27 – July 30 |
|---|---|
| Peak intensity | 65 km/h (40 mph) (1-min) 1003 mbar (hPa) |
Hurricane Bill[]
- Main article: Hurricane Bill (2020/21)
| Category 1 hurricane (SSHWS) | |
  | |
| Duration | September 26 – October 4 |
|---|---|
| Peak intensity | 80 mph (130 km/h) (1-min) 985 mbar (hPa) |
Tropical Storm Cleo[]
| Tropical storm (SSHWS) | |
  | |
| Duration | October 16 – October 21 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) 999 mbar (hPa) |
Tropical Storm Danny[]
| Tropical storm (SSHWS) | |
  | |
| Duration | November 12 – November 16 |
|---|---|
| Peak intensity | 65 mph (100 km/h) (1-min) 991 mbar (hPa) |
Hurricane Elise[]
- Main article: Hurricane Elise (2020-21)
| Category 2 hurricane (SSHWS) | |
  | |
| Duration | November 25 – December 2 |
|---|---|
| Peak intensity | 100 mph (155 km/h) (1-min) 972 mbar (hPa) |
Subtropical Storm Ferdinand[]
| Subtropical storm (SSHWS) | |
  | |
| Duration | November 29 – December 1 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) 996 mbar (hPa) |
Tropical Depression 07B[]
| Tropical depression (SSHWS) | |
  | |
| Duration | December 11 – December 13 |
|---|---|
| Peak intensity | 30 mph (45 km/h) (1-min) 1008 mbar (hPa) |
Tropical Storm Grace[]
| Tropical storm (SSHWS) | |
  | |
| Duration | December 17 – December 20 |
|---|---|
| Peak intensity | 45 mph (75 km/h) (1-min) 1001 mbar (hPa) |
Hurricane Isa[]
| Category 3 hurricane (SSHWS) | |
  | |
| Duration | December 25 – January 5 |
|---|---|
| Peak intensity | 115 mph (185 km/h) (1-min) 962 mbar (hPa) |
Hurricane Harry[]
- Main article: Hurricane Harry (2020-21)
| Category 5 hurricane (SSHWS) | |
  | |
| Duration | December 26 – January 8 |
|---|---|
| Peak intensity | 160 mph (260 km/h) (1-min) 927 mbar (hPa) |
Hurricane Jacob[]
| Category 1 hurricane (SSHWS) | |
  | |
| Duration | January 10 – January 18 |
|---|---|
| Peak intensity | 75 mph (120 km/h) (1-min) 990 mbar (hPa) |
Hurricane Kate[]
| Category 2 hurricane (SSHWS) | |
  | |
| Duration | January 18 – January 29 |
|---|---|
| Peak intensity | 105 mph (165 km/h) (1-min) 968 mbar (hPa) |
Tropical Storm Lucas[]
| Tropical storm (SSHWS) | |
  | |
| Duration | February 6 – February 7 |
|---|---|
| Peak intensity | 45 mph (75 km/h) (1-min) 998 mbar (hPa) |
Hurricane Monica[]
| Category 4 hurricane (SSHWS) | |
  | |
| Duration | February 11 – February 20 |
|---|---|
| Peak intensity | 140 mph (220 km/h) (1-min) 939 mbar (hPa) |
Tropical Storm Nathan[]
| Tropical storm (SSHWS) | |
  | |
| Duration | March 11 – March 18 |
|---|---|
| Peak intensity | 45 mph (75 km/h) (1-min) 1003 mbar (hPa) |
Storm names[]
- Main article: Tropical cyclone naming in the Baltic Sea
|
|
Retirement[]
On April 10, the BSWS retired the name Harry from its rotating naming lists due to the number of deaths and amount of damage it caused. It will be replaced with Henry for the 2024/25 season.
Retirement predictions[]
On March 29, the CWCB released their forecast for retired names, giving a 25% chance of retirement of the name Elise, and a 95% chance of retirement of the name Harry. A day later, on March 30, the SICA also issued their retirement prediction, giving 10% chance of Bill getting retired, 25% chance of Elise getting retired and 95% chance of Harry getting retired. Later that day, yet another meteorological agency, the LHNA, issued their forecast for retired names, giving a 95% chance of retirement of the name Harry and not seeing any chance of other names getting retired. However, one day later they updated their prediction, adding a 15% chance of retirement of the name Elise and maintaining a 95% chance of retirement of the name Harry. Then, on April 3, the NSHHSW predicted 30% chance of the name Elise getting retired and 90% chance of the name Harry getting retired.
Season effects[]
| Storm name |
Dates active | Storm category at peak intensity |
Max 1-min wind mph (km/h) |
Min. press. (mbar) |
Areas affected | Damage (USD) |
Deaths | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Ann | July 27- July 30 | Tropical storm | 40 (65) | 1003 | Island of Gotland, Sweden | ~$50 million | None | |||
| Bill | September 26- October 4 | Category 1 hurricane | 80 (130) | 985 | Northern Poland | ~$470 million | 4 | |||
| Cleo | October 16- October 21 | Tropical storm | 50 (85) | 999 | None | None | None | |||
| Danny | November 12- November 16 | Tropical storm | 65 (100) | 991 | Denmark, Southwestern Sweden | ~$270 million | 2 | |||
| Elise | November 25- December 2 | Category 2 hurricane | 100 (155) | 972 | Latvia, Estonia | ~$730 million | 9 | |||
| Ferdinand | November 29- December 1 | Subtropical storm | 50 (85) | 996 | Finland | Minimal | None | |||
| 07B | December 11- December 13 | Tropical depression | 30 (45) | 1008 | None | None | None | |||
| Grace | December 17- December 20 | Tropical storm | 45 (75) | 1001 | Lithuania | ~$21 million | None | |||
| Isa | December 25- January 5 | Category 3 hurricane | 115 (185) | 962 | None | None | None | |||
| Harry | December 26- January 8 | Category 5 hurricane | 160 (260) | 927 | Island of Bornholm, Island of Oland, Island of Gotland, Eastern Sweden, Fasta Åland Island, Finland | ~$15.450 billion | 68 | |||
| Jacob | January 10- January 18 | Category 1 hurricane | 75 (120) | 990 | Island of Gotland, Fasta Åland Island | Minimal | 1 | |||
| Kate | January 18- January 29 | Category 2 hurricane | 105 (165) | 968 | Latvia | ~4 million | None | |||
| Lucas | February 6- February 7 | Tropical storm | 45 (75) | 998 | None | None | None | |||
| Monica | February 11- February 20 | Category 4 hurricane | 140 (220) | 939 | Poland | >$10 million | 1 | |||
| Nathan | March 11- March 18 | Tropical storm | 45 (75) | 1003 | Poland, Kaliningrad Oblast | Unknown | None | |||
| Season aggregates | ||||||||||
| 15 systems | July 27-March 18 | 160 (260) | 927 | - | >$17.005 billion | 85 total | ||||