Not to be confused with Cyclone Harold, another tropical cyclone that affected Oceania less than a month after.
Intense Tropical Cyclone Herold was a powerful tropical cyclone that affected Madagascar and the Mascarene Islands in March 2020. Herold was the tenth zone of disturbed weather, ninth depression, eighth moderate tropical storm, sixth severe tropical storm, fifth tropical cyclone, and second intense tropical cyclone of the slightly above-average 2019–20 South-West Indian Ocean cyclone season. Herold formed on 13 March from a disorganized area of low pressure near Tromelin Island.[2]
When Herold reached Madagascar, it caused five deaths and an unknown amount of damage. Thousands of homes were flooded in the northeastern region. Maroantsetra got the worst of Herold, with all five deaths it caused coming from there.
Map plotting the intensity and track of the storm, according to the Saffir–Simpson scale
Early in March 2020, an area of low pressure existed near Tromelin Island, but it dissipated on 4 March. It unexpectedly regenerated the next day near the Mascarene Islands. Météo France predicted it would strengthen into a tropical depression by the end of the week.[2] Over the next two weeks, it gradually gained convection,[3] until on 13 March, Zone of Disturbed Weather 10 formed northwest of Madagascar. The next day, the JTWC and MFR upgraded it to a tropical depression.[4] Late on 14 March, 10 reached moderate tropical storm intensity and was named Herold. The JTWC began tracking it as Tropical Cyclone 22S. Herold began to undergo slow intensification. At 18:00 UTC on 15 March, the cyclone was designated Tropical Cyclone Herold. Late on March 17, Herold reached its peak intensity as an Intense tropical cyclone, and the JTWC classified it as a Category 3-equivalent tropical cyclone. As this happened, Herold rapidly moved southeast,[5] Herold's peak intensity was short-lived. On 18 March, Herold began rapidly weakening. Later that day, Herold became extratropical. Finally, on 20 March, Herold dissipated entirely.[6]
Preparationsedit
Madagascaredit
The first alert, a green alert (issued two to five days before the storm's potential impact[7]), was issued on March 13 by Météo Madagascar for the areas in northeastern Madagascar.[8] The next day, the alert was upgraded to a yellow alert (issued one to two days before storm, storm is going to be damaging area but it has not truly happened yet[7]).
Mascarene Islandsedit
On 18 March, a class four cyclone warning was issued for Rodrigues.[9]
Impactedit
Madagascaredit
Herold stalling near the coast of Madagascar on 14 March
Heavy rain was recorded in northeastern Madagascar on 13 March.[10] 95 mm (3.7 in) fell on Sambava that same day. Intense flooding occurred in the Ankavanana River, which threatened more than 1000 people. Five people were killed in the Sava Region. Flooding impacted more than 100 schools. Homes were swept away in areas near Maroantsetra.[11] Near the Andranofotsy River, people were most affected. By 17 March, though, the water level had decreased a fair amount in the community.[12][13] That day, the water level on land rose to 2 meters (6.6 feet). 13 of 20 municipalities in the Maroantsetra district were underwater and 28 houses had been destroyed in the town of Mahalevona.[13] In Maroantsetra, 104 homes were affected by the storm surge. A school in Anjanazana was found with puddles of mud in its classrooms.[14] The effects of Herold didn't end until the cyclone alerts were lifted on 17 March for the entire island.[15] 911 homes were flooded. 178 huts were damaged, and 127 residencies were destroyed in Madagascar.[16] In Maroantsetra, 79 classrooms were damaged, and 24 were damaged in Sainte-Marie.[17]
Mascarene Islandsedit
In the Mascarene Islands, maximum sustained winds of 185 km/h (115 mph) was recorded.[18] When Herold passed in between the islands of Mauritius and Rodrigues on 17 March, it made schools close and caused eighty people to seek refuge in accommodation centers. In the islands, damage was minimal. In most areas, it was limited to downed trees and power outages. However, a gust of 130 km/h (81 mph) was recorded in Sir Gaëtan Duval Airport. Maximum rainfall was no more than 29 mm (1.1 in).[11][19] Herold also briefly passed over Réunion. There was no known damage there.[20]
^"Overall Green Tropical Cyclone alert for HEROLD-20 in Mauritius, Madagascar from 13 Mar 2020 06:00 UTC to 19 Mar 2020 18:00 UTC". www.gdacs.org.
^"Madagascar/Mauritius: Cyclone Herold - Flash Update No. 1, As of 17 March 2020 - Madagascar". ReliefWeb. 17 March 2020.
^17 March 2020. "Herold drenches Madagascar". Retrieved 24 March 2020.
^ ab16 March 2020. "Top News: Tropical Cyclone Herold drenches northeastern Madagascar" Retrieved 24 March 2020.
^17 March 2020. "Sava and Analanjirofo - Over three thousand victims of Herold" Retrieved 25 March 2020.
^ ab16 March 2020. "Herold floods Maroantsetra" Retrieved 25 March 2020.
^17 March 2020. "Cyclone Herold in Madagascar"[permanent dead link]. Retrieved 27 March 2020.
^17 March 2020."Precipitation: Rains expected in Antananarivo" 2020-03-27 at the Wayback Machine Retrieved 27 March 2020.
^22 March 2020. "Damage assessment: 4,771 victims after the passage of Herold" Retrieved 27 March 2020.
^20 March 2020."Cyclone Herold: provisional assessment: Five dead and 1 missing"[permanent dead link] Retrieved 27 March 2020.
^16 March 2020. "A dangerous Category 2 Tropical Cyclone #HEROLD will pass between Mauritius and Rodrigues Island on Tuesday - severe damaging threat for Rodrigues" Retrieved 23 April 2020.
^20 March 2020. "NASA finds Herold a fading ex-tropical cyclone" Retrieved 23 April 2020.
^16 March 2020. "NASA's Aqua satellite snaps new image of Cyclone Herold". Retrieved 23 April 2020.
April 11, 2024
cyclone, herold, confused, with, cyclone, harold, another, tropical, cyclone, that, affected, oceania, less, than, month, after, intense, tropical, powerful, tropical, cyclone, that, affected, madagascar, mascarene, islands, march, 2020, herold, tenth, zone, d. Not to be confused with Cyclone Harold another tropical cyclone that affected Oceania less than a month after Intense Tropical Cyclone Herold was a powerful tropical cyclone that affected Madagascar and the Mascarene Islands in March 2020 Herold was the tenth zone of disturbed weather ninth depression eighth moderate tropical storm sixth severe tropical storm fifth tropical cyclone and second intense tropical cyclone of the slightly above average 2019 20 South West Indian Ocean cyclone season Herold formed on 13 March from a disorganized area of low pressure near Tromelin Island 2 Intense Tropical Cyclone Herold Herold at peak intensity on 17 MarchMeteorological historyFormed13 March 2020 13 March 2020 Remnant low19 March 2020Dissipated21 March 2020 21 March 2020 Intense tropical cyclone10 minute sustained MF Highest winds165 km h 105 mph Highest gusts230 km h 145 mph Lowest pressure955 hPa mbar 28 20 inHgCategory 3 equivalent tropical cyclone1 minute sustained SSHWS JTWC Highest winds185 km h 115 mph Lowest pressure960 hPa mbar 28 35 inHgOverall effectsFatalities5 totalDamageUnknownAreas affectedMadagascar Tromelin Island Mauritius RodriguesIBTrACS 1 Part of the 2019 20 South West Indian Ocean cyclone seasonWhen Herold reached Madagascar it caused five deaths and an unknown amount of damage Thousands of homes were flooded in the northeastern region Maroantsetra got the worst of Herold with all five deaths it caused coming from there Contents 1 Meteorological history 2 Preparations 2 1 Madagascar 2 2 Mascarene Islands 3 Impact 3 1 Madagascar 3 2 Mascarene Islands 4 See also 5 ReferencesMeteorological history edit nbsp Map plotting the intensity and track of the storm according to the Saffir Simpson scaleEarly in March 2020 an area of low pressure existed near Tromelin Island but it dissipated on 4 March It unexpectedly regenerated the next day near the Mascarene Islands Meteo France predicted it would strengthen into a tropical depression by the end of the week 2 Over the next two weeks it gradually gained convection 3 until on 13 March Zone of Disturbed Weather 10 formed northwest of Madagascar The next day the JTWC and MFR upgraded it to a tropical depression 4 Late on 14 March 10 reached moderate tropical storm intensity and was named Herold The JTWC began tracking it as Tropical Cyclone 22S Herold began to undergo slow intensification At 18 00 UTC on 15 March the cyclone was designated Tropical Cyclone Herold Late on March 17 Herold reached its peak intensity as an Intense tropical cyclone and the JTWC classified it as a Category 3 equivalent tropical cyclone As this happened Herold rapidly moved southeast 5 Herold s peak intensity was short lived On 18 March Herold began rapidly weakening Later that day Herold became extratropical Finally on 20 March Herold dissipated entirely 6 Preparations editMadagascar edit The first alert a green alert issued two to five days before the storm s potential impact 7 was issued on March 13 by Meteo Madagascar for the areas in northeastern Madagascar 8 The next day the alert was upgraded to a yellow alert issued one to two days before storm storm is going to be damaging area but it has not truly happened yet 7 Mascarene Islands edit On 18 March a class four cyclone warning was issued for Rodrigues 9 Impact editMadagascar edit nbsp Herold stalling near the coast of Madagascar on 14 MarchHeavy rain was recorded in northeastern Madagascar on 13 March 10 95 mm 3 7 in fell on Sambava that same day Intense flooding occurred in the Ankavanana River which threatened more than 1000 people Five people were killed in the Sava Region Flooding impacted more than 100 schools Homes were swept away in areas near Maroantsetra 11 Near the Andranofotsy River people were most affected By 17 March though the water level had decreased a fair amount in the community 12 13 That day the water level on land rose to 2 meters 6 6 feet 13 of 20 municipalities in the Maroantsetra district were underwater and 28 houses had been destroyed in the town of Mahalevona 13 In Maroantsetra 104 homes were affected by the storm surge A school in Anjanazana was found with puddles of mud in its classrooms 14 The effects of Herold didn t end until the cyclone alerts were lifted on 17 March for the entire island 15 911 homes were flooded 178 huts were damaged and 127 residencies were destroyed in Madagascar 16 In Maroantsetra 79 classrooms were damaged and 24 were damaged in Sainte Marie 17 Mascarene Islands edit In the Mascarene Islands maximum sustained winds of 185 km h 115 mph was recorded 18 When Herold passed in between the islands of Mauritius and Rodrigues on 17 March it made schools close and caused eighty people to seek refuge in accommodation centers In the islands damage was minimal In most areas it was limited to downed trees and power outages However a gust of 130 km h 81 mph was recorded in Sir Gaetan Duval Airport Maximum rainfall was no more than 29 mm 1 1 in 11 19 Herold also briefly passed over Reunion There was no known damage there 20 See also edit nbsp Tropical cyclones portalWeather of 2020 Tropical cyclones in 2020 Cyclone Belna a storm of similar intensity that also affected Madagascar 2019 20 South West Indian Ocean cyclone season List of South West Indian Ocean intense tropical cyclonesReferences edit HEROLD 2020 03 12 TO 2020 03 21 Meteo France La Reunion Retrieved 23 July 2023 a b http www meteo fr temps domtom La Reunion webcmrs9 0 francais activiteope bulletins zcit ZCITF 202003011000 pdf bare URL PDF Low Pressure Area forms near Tromelin Islands Tropical Cyclone Herold forms off the coast of Madagascar www aljazeera com NASA sees Tropical Cyclone Herold s eye phys org Herold 2020 Hurricane And Typhoon Updates blogs nasa gov 20 March 2020 a b Cyclone DGM www meteomadagascar mg Overall Green Tropical Cyclone alert for HEROLD 20 in Mauritius Madagascar from 13 Mar 2020 06 00 UTC to 19 Mar 2020 18 00 UTC www gdacs org Madagascar Mauritius Cyclone Herold Flash Update No 1 As of 17 March 2020 Madagascar ReliefWeb 17 March 2020 17 March 2020 Herold drenches Madagascar Retrieved 24 March 2020 a b 16 March 2020 Top News Tropical Cyclone Herold drenches northeastern Madagascar Retrieved 24 March 2020 17 March 2020 Sava and Analanjirofo Over three thousand victims of Herold Retrieved 25 March 2020 a b 16 March 2020 Herold floods Maroantsetra Retrieved 25 March 2020 17 March 2020 Cyclone Herold in Madagascar permanent dead link Retrieved 27 March 2020 17 March 2020 Precipitation Rains expected in Antananarivo Archived 2020 03 27 at the Wayback Machine Retrieved 27 March 2020 22 March 2020 Damage assessment 4 771 victims after the passage of Herold Retrieved 27 March 2020 20 March 2020 Cyclone Herold provisional assessment Five dead and 1 missing permanent dead link Retrieved 27 March 2020 16 March 2020 A dangerous Category 2 Tropical Cyclone HEROLD will pass between Mauritius and Rodrigues Island on Tuesday severe damaging threat for Rodrigues Retrieved 23 April 2020 20 March 2020 NASA finds Herold a fading ex tropical cyclone Retrieved 23 April 2020 16 March 2020 NASA s Aqua satellite snaps new image of Cyclone Herold Retrieved 23 April 2020 Retrieved from https en wikipedia org w index php title Cyclone Herold amp oldid 1193087732, wikipedia, wiki, book, books, library,
