Jon Jelsema (July 24, 2020). "Hurricane Douglas Discussion Number 17". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 29, 2020.
Jon Jelsema (July 24, 2020). "Hurricane Douglas Advisory Number 17". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 1, 2020.
Thomas R. Birchard (July 24, 2020). "Hurricane Douglas Discussion Number 18". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 1, 2020.
Jon Jelsema (July 25, 2020). "Hurricane Douglas Discussion Number 20". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Derek Wroe (July 25, 2020). "Hurricane Douglas Discussion Number 22". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Derek Wroe (July 25, 2020). "Hurricane Douglas Advisory Number 22". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Tomas R. Birchard (July 26, 2020). "Hurricane Douglas Discussion Number 24". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Derek Wroe (July 26, 2020). "Hurricane Douglas Discussion Number 26". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Derek Wroe (July 26, 2020). "Hurricane Douglas Advisory Number 25A". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Sam Houston; Thomas R. Birchard (July 27, 2020). "Hurricane Douglas Tropical Cyclone Update". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Sam Houston; Thomas R. Birchard (July 27, 2020). "Hurricane Douglas Tropical Cyclone Update". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Thomas R. Birchard (July 27, 2020). "Hurricane Douglas Discussion Number 29". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Jeff Powell (July 27, 2020). "Hurricane Douglas Discussion Number 30". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved July 31, 2020.
Thomas R. Birchard (July 26, 2020). "Hurricane Douglas Advisory Number 24". nhc.noaa.gov. Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 1, 2020.