Subtropical Storm Alpha (2020) (English Wikipedia)

Sosnowski, Alex (17 September 2020) [Updated 20 September 2020]. "Tropical Storm Beta to spend days pounding Gulf Coast". newscentermaine.com. Portland, Maine: WCSH. Retrieved 6 November 2020.

noaa.gov

Brown, Daniel (28 January 2021). "Subtropical Storm Alpha" (PDF). Tropical Cyclone Report. Miami, Florida: National Hurricane Center. Retrieved 14 May 2021.
Blake, Eric (15 September 2020). "Two-Day Graphical Tropical Weather Outlook". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved 18 September 2020.
Berg, Robbie (15 September 2020). "Two-Day Graphical Tropical Weather Outlook". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved 18 September 2020.
Andrew Latto (17 September 2020). "Two-Day Graphical Tropical Weather Outlook". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved 18 September 2020.
Blake, Eric (18 September 2020). "Subtropical Storm Alpha Special Discussion Number 1". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved 18 September 2020.
Blake, Eric (18 September 2020). "Subtropical Storm Alpha Discussion Number 2". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved 18 September 2020.

"Ciclone Alpha: Aviso laranja por agravamento de mau tempo hoje no distrito de Coimbra | Notícias de Coimbra". www.noticiasdecoimbra.pt (in Portuguese). Notícias de Coimbra. 18 September 2020. Retrieved 18 September 2020.

Rainho, Martine (19 September 2020). "Leiria: Ciclone Alpha derruba torre da Rádio 94FM". Região de Leiria (in European Portuguese). Retrieved 19 September 2020.

Machemer, Theresa (24 September 2020). "Out of Names, National Hurricane Center Calls New Storms by Greek Letters". Smithsonian. Retrieved 5 November 2020.

""Unique" Iberian subtropical storm recorded". www.theportugalnews.com. The Portugal News. 25 September 2020. Retrieved 14 May 2021.

Blašković, Teo (21 September 2021). "Mainland Portugal hit by its first (sub)tropical cyclone on record". The Watchers - Daily news service | Watchers.NEWS. Retrieved 14 May 2021.

"Global Catastrophe Recap September 2020" (PDF). Aon. 8 October 2020. Archived (PDF) from the original on 8 October 2020. Retrieved 8 October 2020.
"WMO Hurricane Committee retires tropical cyclone names and ends the use of Greek alphabet". Geneva, Switzerland: World Meteorological Organization. 17 March 2021. Archived from the original on 18 December 2023. Retrieved 17 March 2021.

"WMO Hurricane Committee retires tropical cyclone names and ends the use of Greek alphabet". Geneva, Switzerland: World Meteorological Organization. 17 March 2021. Archived from the original on 18 December 2023. Retrieved 17 March 2021.

Meteo Trás-os-Montes - Portugal [@MateoTrasMontPT] (18 September 2020). "TornadoCloud with tornado em é Lagameças, perto de #Setubal. Impressionante! Credit: Café Esperança #Invest99L" (Tweet) (in Portuguese). Retrieved 7 February 2021 – via Twitter.

Masters, Jeff; Henson, Bob (18 September 2020). "A slew of weather events – including two named storms troubling Europe – pose challenges far and wide". Yale Climate Connections. New Haven, Connecticut: Yale Center for Environmental Communication, Yale School of the Environment. Retrieved 6 November 2020.